On the mass of the neutron star in Cyg X-2 (2009)
Casares, J., Hernandez, J. I. Gonzalez, Israelian, G., Rebolo, R.
We present new high resolution spectroscopy of the low mass X-ray binary Cyg X-2 which enables us to refine the orbital solution and rotational broadening of the donor star. In contrast with Elebert...
The Chemical Composition of Cernis 52 (BD+31 640) (2009)
Hernandez, J. I. Gonzalez, Iglesias-Groth, S., Rebolo, R., Garcia-Hernandez, D. A., Manchado, A., Lambert, D. L.
We present an abundance analysis of the star Cernis 52 in whose spectrum we recently reported the napthalene cation in absorption at 6707.4 {\AA}. This star is on a line of sight to the Perseus...
Candidate free-floating super-Jupiters in the young sigma Orionis open cluster (2009)
Bihain, G., Rebolo, R., Osorio, M. R. Zapatero, Béjar, V. J. S., Villó-Pérez, I., Díaz-Sánchez, A., ...
Free-floating substellar candidates with estimated theoretical masses of as low as ~5 Jupiter masses have been found in the ~3 Myr old sigma Orionis open cluster. As the overlap with the planetary...
Flores-Cacho, I., Rubiño-Martín, J. A., Luzzi, G., Rebolo, R., De Petris, M., Yepes, G., ...
[Abridged] We study the thermal and kinetic Sunyaev-Zel'dovich (SZ) effect associated with superclusters of galaxies using the MareNostrum Universe SPH simulation. We consider superclusters similar...
A census of very-low-mass stars and brown dwarfs in the sigma Orionis cluster (2009)
Lodieu, N., Osorio, M. R. Zapatero, Rebolo, R., Martin, E. L., Hambly, N. C.
(ABRIDGED) We have analysed the near-infrared photometric data from the Fourth Data Release (DR4) of the UKIRT Infrared Deep Sky Suvey (UKIDSS) Galactic Clusters Survey (GCS) to derive the cluster...
Padilla-Torres, C. P., Gutierrez, C. M., Rebolo, R., Genova-Santos, R., Rubino-Martin, J. A.
We study the spatial distribution and colours of galaxies within the region covered by the cold spot in the cosmic microwave background (CMB) recently detected by the Very Small Array (VSA;...
SPACE: the spectroscopic all-sky cosmic explorer (2009)
Cimatti, A., Robberto, M., Baugh, C., Beckwith, S. V. W., Content, R., Daddi, E., ...
We describe the scientific motivations, the mission concept and the instrumentation of SPACE, a class-M mission proposed for concept study at the first call of the ESA Cosmic-Vision 2015–2025...
The Quijote CMB Experiment (2008)
Rubino-Martin, J. A., Rebolo, R., Tucci, M., Genova-Santos, R., Hildebrandt, S. R., Hoyland, R., ...
We present the current status of the QUIJOTE (Q-U-I JOint TEnerife) CMB Experiment, a new instrument which will start operations early 2009 at Teide Observatory, with the aim of characterizing the...
Chemical abundances of late-type pre-main sequence stars in the $\sigma$-Orionis cluster (2008)
Hernández, J. I. González, Caballero, J. A., Rebolo, R., Béjar, V. J. S., Navascués, D. Barrado Y, Martín, E. L., ...
The young $\sigma$-Orionis cluster is an important location for understanding the formation and evolution of stars, brown dwarfs, and planetary-mass objects. Its metallicity, although being a...
Tucci, M., Rubiño-Martin, J. A., Rebolo, R., Genova-Santos, R., Watson, R. A., Battye, R. A., ...
We present an analysis of the spectral properties of the extragalactic radio sources in the nearly complete Very Small Array (VSA) sample at 33 GHz. Data from different surveys are used to study...
Tucci, M., Rubiño-Martin, J. A., Rebolo, R., Genova-Santos, R., Watson, R. A., Battye, R. A., ...
We present an analysis of the spectral properties of the extragalactic radio sources in the nearly-complete VSA sample at 33GHz. Data from different surveys are used to study source spectra between...
Liske, J., Pasquini, L., Bonifacio, P., Bouchy, F., Carswell, R. F., Cristiani, S., ...
CODEX and ESPRESSO are concepts for ultra-stable, high-resolution spectrographs at the E-ELT and VLT, respectively. Both instruments are well motivated by distinct sets of science drivers. However,...
New constraints on the membership of the T dwarf S Ori 70 in the σ Orionis cluster (2008)
Zapatero Osorio, M. R., Béjar, V. J. S., Bihain, G., Martín, E. L., Rebolo, R., Villó-Pérez, I., ...
Aims.The nature of S Ori 70 (S Ori J053810.1-023626), a faint mid-T type object found towards the direction of the young sigma Orionis cluster, is still under debate. We intend to find out whether it...
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more.. (2007)
Cristiani, S., Avila, G., Bonifacio, P., Bouchy, F., Carswell, B., D'Odorico, S., ...
CODEX, a high resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the...
Bejar, V. J. S., Osorio, M. R. Zapatero, Perez-Garrido, A., Alvarez, C., Martin, E. L., Rebolo, R., ...
We present the discovery of a companion near the deuterium burning mass limit located at a very wide distance, at an angular separation of 4.6+/-0.1 arcsec (projected distance of ~ 670 AU) from...
Iso Soc Vilspa, K. Leech, B. Altieri, P. Claes, R. Laureijs, E. L. Martin, ...
. Teide 1 and Calar 3 are unique objects in being the first solitary Brown Dwarfs discovered. This point deserves stressing - they are not companions to other objects (in fact they are distant from...
New constraints on the membership of the T dwarf S Ori 70 in the sigma Orionis cluster (2007)
Osorio, M. R. Zapatero, Bejar, V. J. S., Bihain, G., Martin, E. L., Rebolo, R., Villo-Perez, I., ...
(Abridged) The nature of S Ori 70, a faint mid-T type object found towards the direction of the young sigma Orionis cluster, is still under debate. We intend to disentangle whether it is a field...
Hildebrandt, S. R., Rebolo, R., Rubiño-Martín, J. A., Watson, R. A., Gutiérrez, C. M., Hoyland, R. J., ...
We present observations with the new 11 GHz radiometer of the COSMOSOMAS experiment at the Teide Observatory (Tenerife). The sky region between 0 deg
The Black Hole Binary Nova Scorpii 1994 (GRO J1655-40): An improved chemical analysis (2007)
Hernandez, J. I. Gonzalez, Rebolo, R., Israelian, G.
The chemical analysis of secondary stars of low mass X-ray binaries provides an opportunity to study the formation processes of compact objects, either black holes or neutron stars. Following the...
Caballero, J. A., Béjar, V. J. S., Rebolo, R., Eislöffel, J., Osorio, M. R. Zapatero, Mundt, R., ...
We investigate the mass function in the substellar domain down to a few Jupiter masses in the young sigma Orionis open cluster (3+/-2 Ma, d = 360^+70_-60 pc). We have performed a deep IJ-band search,...
Discs of planetary-mass objects in s Orionis (2007)
Zapatero Osorio, M. R., Caballero, J. A., Béjar, V. J. S., Rebolo, R., Bihain, G., ...
Aims.We searched for infrared flux excesses of planetary-mass candidates in the sigma Orionis cluster (~3 Myr, ~350 pc). Methods: Using IJHKs data from the literature and the [3.6], [4.5], [5.8], and...
Caballero, J. A., Béjar, V. J. S., Rebolo, R., Eislöffel, J., Zapatero Osorio, M. R., Mundt, R., ...
Aims.We investigate the mass function in the substellar domain down to a few Jupiter masses in the young sigma Orionis open cluster (3±2 Ma, d = 360^+70_-60 pc). Methods: We have performed a deep...
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more (2007)
Cristiani, Stefano, Avila, Gerardo, Bonifacio, Piercarlo, Bouchy, Francois, Carswell, B., D'Odorico, Sandro D., ...
CODEX, a high-resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the...
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more (2007)
Cristiani, Stefano, Avila, Gerardo, Bonifacio, Piercarlo, Bouchy, Francois, Carswell, B., D'Odorico, Sandro D., ...
CODEX, a high-resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the...
Fernandez-Cerezo, S., Gutierrez, C.M., Rebolo, R., Watson, R.A., Hoyland, R.J., Hildebrandt, S., ...
(Abridged) We present the analysis of the first 18 months of data obtained with the COSMOSOMAS experiment at the Teide Observatory (Tenerife). Three maps have been obtained at 12.7, 14.7 and 16.3 GHz...
Pleiades low-mass brown dwarfs: the cluster L dwarf sequence (2006)
Bihain, G., Rebolo, R., Bejar, V. J. S., Caballero, J. A., Mundt, R., ...
We present a search for low-mass brown dwarfs in the Pleiades open cluster. The identification of Pleiades members fainter and cooler than those currently known allows us to constrain evolutionary...
Rubiño-Martín, J.A., Aliaga, A.M., Barreiro, R.B., Battye, R.A., Carreira, P., Cleary, K., ...
Out of the 41 published VSA individual pointings dedicated to cosmological [cosmic microwave background (CMB)] observations, 37 are found to be consistent with Gaussianity, whereas four pointings...
Millimetric observation of the SZ effect in the Corona Borealis supercluster (2006)
Battistelli, E. S., De Petris, M., Lamagna, L., Watson, R. A., Rebolo, R., Melchiorri, F., ...
We have observed the Corona Borealis Supercluster with the Millimeter and Infrared Testa grigia Observatory (MITO), located in the Italian Alps, at 143, 214, 272, and 353 GHz. We present a...
Battistelli, E. S., Rebolo, R., Rubiño-Martín, J. A., Hildebrandt, S. R., Watson, R. A., Gutiérrez, C., ...
The anomalous microwave emission detected in the Perseus molecular complex by Watson \ea has been observed at 11 GHz through dual orthogonal polarizations with the COSMOSOMAS experiment. Stokes U and...
Fernandez-Cerezo, S., Gutierrez, C. M., Rebolo, R., Watson, R. A., Hoyland, R. J., Hildebrandt, S. R., ...
(Abridged) We present the analysis of the first 18 months of data obtained with the COSMOSOMAS experiment at the Teide Observatory (Tenerife). Three maps have been obtained at 12.7, 14.7 and 16.3 GHz...
Fernandez-Cerezo, S., Gutierrez, C. M., Rebolo, R., Watson, R. A., Hoyland, R. J., Hildebrandt, S., ...
(Abridged) We present the analysis of the first 18 months of data obtained with the COSMOSOMAS experiment at the Teide Observatory (Tenerife). Three maps have been obtained at 12.7, 14.7 and 16.3 GHz...
Fernandez-Cerezo, S., Gutierrez, C. M., Rebolo, R., Watson, R. A., Hoyland, R. J., Hildebrandt, S., ...
(Abridged) We present the analysis of the first 18 months of data obtained with the COSMOSOMAS experiment at the Teide Observatory (Tenerife). Three maps have been obtained at 12.7, 14.7 and 16.3 GHz...
Pleiades low-mass brown dwarfs: the cluster L dwarf sequence (2006)
Bihain, G., Rebolo, R., Béjar, V. J. S., Caballero, J. A., Mundt, R., ...
Aims.We present a search for low-mass brown dwarfs in the Pleiades open cluster. The identification of Pleiades members fainter and cooler than those currently known allows us to constrain...
Proper motion Pleiades candidate L-type brown dwarfs (2005)
Bihain, G., Rebolo, R., Bejar, V. J. S., Caballero, J. A., Mundt, R.
We present results of an optical and near-infrared (IR) 1.8 deg^2 survey in the Pleiades open cluster to search for substellar objects. From optical I-band images from the CFHT and J-band images from...
S Ori J053825.4-024241: A Classical T Tauri-like object at the substellar boundary (2005)
Caballero, J. A., Martín, E. L., Osorio, M. R. Zapatero, Béjar, V. J. S., Rebolo, R., Pavlenko, Ya., ...
We present a spectrophotometric analysis of S Ori J053825.4-024241, a candidate member close to the substellar boundary of the young (1-8 Myr), nearby (~360 pc) sigma Orionis star cluster. Our...
Oxygen abundances in planet-harbouring stars. Comparison of different abundance indicators (2005)
Ecuvillon, A., Israelian, G., Santos, N. C., Shchukina, N. G., Mayor, M., Rebolo, R.
We present a detailed and uniform study of oxygen abundances in 155 solar type stars, 96 of which are planet hosts and 59 of which form part of a volume-limited comparison sample with no known...
A search for planetary-mass objects and brown dwarfs in the Upper Scorpius association (2005)
Costado, M. T., Bejar, V. J. S., Caballero, J. A., Rebolo, R., Acosta-Pulido, J., Manchado, A.
We report the results of a deep photometric search for planets and brown dwarfs in the nearby young OB Upper Scorpius association. We obtained optical (I) and near-infrared (JKs) images around nine...
Watson, R. A., Rebolo, R., Rubino-Martin, J. A., Hildebrandt, S., Gutierrez, C. M., Fernandez-Cerezo, S., ...
We present direct evidence for anomalous microwave emission in the Perseus molecular cloud, which shows a clear rising spectrum from 11 to 17 GHz in the data of the COSMOSOMAS experiment. By...
On the kinematics of the neutron star low mass X-ray binary Cen X-4 (2005)
Hernández, J. I. González, Rebolo, R., Peñarrubia, J., Casares, J., Israelian, G.
We present the first determination of the proper motion of the neutron star low mass X-ray binary {Cen X-4} measured from relative astrometry of the secondary star using optical images at different...
Rajguru, N., Myers, S. T., Battye, R. A., Bond, J. Richard, Cleary, K., Contaldi, C. R., ...
We present coincident observations of the Cosmic Microwave Background (CMB) from the Very Small Array (VSA) and Cosmic Background Imager (CBI) telescopes. The consistency of the full datasets is...
On the kinematics of the neutron star low mass X-ray binary Cen X-4 (2005)
González Hernández, J. I., Rebolo, R., Peñarrubia, J., Casares, J., Israelian, G.
We present the first determination of the proper motion of the neutron star low mass X-ray binary Cen X-4 measured from relative astrometry of the secondary star using optical images at different...
Proper motion Pleiades candidate L-type brown dwarfs (2005)
Bihain, G., Rebolo, R., Béjar, V. J. S., Caballero, J. A., Mundt, R.
We present results of an optical and near-infrared (IR) 1.8 deg2 survey in the Pleiades open cluster to search for substellar objects. From optical I-band images from the CFHT and J-band images from...
Cosmological parameter estimation using Very Small Array data out to ℓ= 1500 (2004)
Rebolo, R., Battye, R.A., Carreira, P., Cleary, K., Davies, R.D., Davis, R.J., ...
We estimate cosmological parameters using data obtained by the Very Small Array (VSA) in its extended configuration, in conjunction with a variety of other cosmic microwave background (CMB) data and...
Cosmological parameter estimation using Very Small Array data out to ℓ= 1500 (2004)
Rebolo, R., Battye, R.A., Carreira, P., Cleary, K., Davies, R.D., Davis, R.J., ...
We estimate cosmological parameters using data obtained by the Very Small Array (VSA) in its extended configuration, in conjunction with a variety of other cosmic microwave background (CMB) data and...
Are beryllium abundances anomalous in stars with giant planets? (2004)
Santos, N. C., Israelian, G., Lopez, R. J Garcia, Mayor, M., Rebolo, R., Randich, S., ...
In this paper we present beryllium (Be) abundances in a large sample of 41 extra-solar planet host stars, and for 29 stars without any known planetary-mass companion, spanning a large range of...
Beryllium anomalies in solar-type field stars (2004)
Santos, N. C., Israelian, G., Randich, S., Lopez, R. J. Garcia, Rebolo, R.
We present a study of beryllium (Be) abundances in a large sample of field solar-type dwarfs and sub-giants spanning a large range of effective temperatures. The analysis shows that Be is severely...
Estimating the bispectrum of the Very Small Array data (2004)
Smith, S., Rocha, R., Challinor, A., Battye, R.A., Carreira, P., Cleary, K., ...
We estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in 2002 December, and compare our results with those obtained from Gaussian...
Photometric variability of young brown dwarfs in the sigma Orionis open cluster (2004)
Caballero, J. A., Bejar, V. J. S., Rebolo, R., Osorio, M. R. Zapatero
We have carried out multi-epoch, time-series differential I-band photometry of a large sample of objects in the south-east region of the young (~3 Myr), nearby (~350 pc) sigma Orionis open cluster. A...
Galactic Evolution of Nitrogen (2004)
Israelian, G., Ecuvillon, A., Rebolo, R., Lopez, R. Garcia, Bonifacio, P., Molaro, P.
We present detailed spectroscopic analysis of nitrogen abundances in 31 unevolved metal-poor stars analysed by spectral synthesis of the near-UV NH band at 3360 A observed at high resolution with...
Cu and Zn in the early Galaxy (2004)
Bihain, G., Israelian, G., Rebolo, R., Bonifacio, P., Molaro, P.
We present Cu and Zn abundances for 38 FGK stars, mostly dwarfs, spanning a metallicity range between solar and [Fe/H] =-3. The abundances were obtained using Kurucz's local thermal equilibrium (LTE)...
Bejar, V. J. S., Osorio, M. R. Zapatero, Rebolo, R.
We present an RI photometric survey covering an area of 430 arcmin^2 around the multiple star Sigma Orionis. The observations were conducted with the 0.8 m IAC-80 Telescope at the Teide Observatory....
Chemical Abundances in the Secondary Star in the Black Hole Binary A0620-00 (2004)
Gonzalez-Hernandez, Jonay I., Rebolo, R., Israelian, G., Casares, J., Maeder, A., Meynet, G.
Using a high resolution spectrum of the secondary star in the black hole binary A0620-00, we have derived the stellar parameters and veiling caused by the accretion disk in a consistent way. We have...
Israelian, G., Shchukina, N., Rebolo, R., Basri, G., Gonzalez-Hernandez, J. I., Kajino, T.
We report the results of a non-LTE Fe, O and Mg abundance analysis of the carbon-nitrogen-rich ultra-metal-poor giants CS29498--043 and CS22949--037. The abundance of oxygen has been derived from...
The Quest for Microwave Foreground X (2003)
Tegmark, Max, Davies, R. D., Gutierrez, Carlos M., Lasenby, A. N., Rebolo, R., ...
The WMAP team has produced a foreground map that can account for most of the low-frequency Galactic microwave emission in the WMAP maps, tentatively interpreting it as synchrotron emission....
Photometric variability of a young, low-mass brown dwarf (2003)
Osorio, M. R. Zapatero, Caballero, J. A., Bejar, V. J. S., Rebolo, R.
We report differential I-band and J-band photometry of S Ori 45, a cool (M8.5), young (1-8 Myr) brown dwarf of the sigma Orionis cluster with a likely mass estimated at around 20 times the mass of...
First results from the Very Small Array - IV. Cosmological parameter estimation (2003)
Rubino-Martin, J. A., Rebolo, R., Carreira, P., Cleary, K., Davies, R. D., Davis, R. J., ...
The Sigma Orionis substellar population. VLT/FORS spectroscopy and 2Mass photometry (2003)
Béjar, V.J.S., Mundt, R., Martín, E.L., Rebolo, R., Zapatero Osorio, M.R., ...
The Substellar Population in s Orionis (2003)
Zapatero Osorio, M. R., Béjar, V. J. S., Rebolo, R., Caballero, J. A., Martín, E. L., ...
Santos, N. C., Israelian, G., Mayor, M., Rebolo, R., Udry, S.
In this article we present a detailed spectroscopic analysis of more than 50 extra-solar planet host stars. Stellar atmospheric parameters and metallicities are derived using high resolution and high...
A Methane Isolated Planetary Mass Object in Orion (2002)
Osorio, M. R. Zapatero, Bejar, V. J. S., Martin, E. L., Rebolo, R., Navascues, D. Barrado Y, Mundt, R., ...
We report on the discovery of a free-floating methane dwarf toward the direction of the young star cluster sigma Orionis. Based on the object's far-red optical and near-infrared photometry and...
Activity at the Deuterium-Burning Mass Limit in Orion (2002)
Osorio, M. R. Zapatero, Bejar, V. J. S., Martin, E. L., Navascues, D. Barrado Y, Rebolo, R.
We report very intense and variable Halpha emission (pseudo-equivalent widths of ~180, 410 A) of S Ori 55, a probable free-floating, M9-type substellar member of the young sigma Orionis open star...
Planet accretion and the abundances of lithium isotopes (2002)
Planet accretion onto solar type stars may significantly change the stellar atmospheric abundances of 6Li and 7Li if it takes place after the star has arrived at the main sequence. Ingestion of...
Beryllium abundances in stars hosting giant planets (2002)
Santos, N. C., Lopez, R. J. Garcia, Israelian, G., Mayor, M., Rebolo, R., Garcia-Gil, A., ...
We have derived beryllium abundances in a wide sample of stars hosting planets, with spectral types in the range F7V-K0V, aimed at studying in detail the effects of the presence of planets on the...
Lithium and Halpha in stars and brown dwarfs of sigma Orionis (2002)
Osorio, M. R. Zapatero, Bejar, V. J. S., Pavlenko, Ya., Rebolo, R., Prieto, C. Allende, Martin, E. L., ...
We present intermediate- and low-resolution optical spectra around Halpha and LiI 6708 A for a sample of 25 low mass stars and 2 brown dwarfs with confirmed membership in the pre-main sequence...
VLT/FORS Spectroscopy in s; Orionis: Isolated Planetary Mass Candidate Members (2002)
Zapatero Osorio, M. R., Béjar, V., Rebolo, R., Martín, E. L., Mundt, R, ...
A Methane, Isolated, Planetary-Mass Object in Orion (2002)
Zapatero Osorio, M. R., Béjar, V. J. S., Martín, E. L., Rebolo, R., Navascués, D. Barrado Y., Mundt, R., ...
Direct Imaging and Spectroscopy of a Young Jupiter-like Object (2002)
Martin, E. L., Zapatero Osorio, M. R., Bejar, V. J. S., Rebolo, R., Mundt, R., ...
We report on our continuing effort to identify extremely low-mass members of the cluster around the hot star sigma Orionis. Using the KeckI telescope in Hawaii and the Isaac Newton telescope in La...
Discovery of a Very Cool Object with Extraordinarily Strong Hα Emission (2002)
Zapatero Osorio, M. R., Martín, E. L., Béjar, V. J. S., Rebolo, R., Mundt, R.
Optical spectroscopy of isolated planetary mass objects in the sigma Orionis cluster (2001)
Zapatero-Osorio, M. R., Béjar, V. J. S., Rebolo, R., Martín, E. L., Mundt, R., ...
We have obtained low resolution optical spectra of 15 isolated planetary mass objects (IPMOs) in the sigma Orionis cluster, and derived spectral types by comparison with nearby M and L dwarfs. The...
Keck NIRC Observations of Planetary-mass Candidate Members in the sigma Orionis Open Cluster (2001)
Martin, E. L., Osorio, M. R. Zapatero, Navascues, D. Barrado Y, Bejar, V. J. S., Rebolo, R.
We present K-band photometry and low-resolution near-infrared spectroscopy from 1.44 to 2.45 micron of isolated planetary-mass candidate members in the sigma Orionis cluster found by Zapatero Osorio...
COSMOSOMAS: A Circular Scanning Instrument to Map the Sky at Centimetric Wavelengths (2001)
Gallegos, J. E., Macias-Perez, J. F., Gutierrez, C. M., Rebolo, R., Watson, R. A., Hoyland, R. J., ...
We describe the first instrument of a Cosmic Microwave Background experiment for mapping cosmological structures on medium angular scales (the COSMOSOMAS experiment) and diffuse Galactic emission....
The Substellar Mass Function in sigma Orionis (2001)
Bejar, V. J. S., Martin, E. L., Osorio, M. R. Zapatero, Rebolo, R., Navascues, D. Barrado Y, ...
We combine results from imaging searches for substellar objects in the sigma Orionis cluster and follow-up photometric and spectroscopic observations to derive a census of the brown dwarf population...
Oxygen in the Very Early Galaxy (2001)
Israelian, G., Rebolo, R., Lopez, R. Garcia, Bonifacio, P., Molaro, P., Basri, G., ...
Oxygen abundances in a sample of ultra-metal-poor subdwarfs have been derived from measurements of the oxygen triplet at 7771--5 A and OH lines in the near UV performed in high-resolution and high...
Magnetic fields in cool stars. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Moreno-Insertis, F., Saar, S. H., Solanki, S. K.
Radiance of solar spectral lines observed with CDS and SUMER on SOHO. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Pauluhn, A., Schühle, U., Solanki, S. K., ...
Noise reduction in GOLF spectra using wavelets. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Régulo, C., Roca Cortés, T., Solanki, S. K., ...
Velocity fields in an active region loop system observed on the solar disc with SUMER/SOHO. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Lanzafame, A. C., Spadaro, D., Consoli, L., ...
Buried flux tubes in the coronal graveyard. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Schüssler, M., Holzwarth, V., Solanki, S. K., ...
Storage of a strong magnetic field below the solar convection zone. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Rempel, M., Schüssler, M., Moreno-Insertis, F.
Star spot patterns on young stars: Theoretical approach. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Granzer, Th., Caligari, P., Schüssler, M., ...
Consistent empirical models of solar magnetic flux tubes and the surrounding convection. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Frutiger, C., Solanki, S. K.
Empirical models of stellar convection. (2001)
López, R. J. García, Rebolo, R., Osorio, M. R. Zapatero, Frutiger, C., Solanki, S. K.
Millimetric Ground Based Observation of CMBR Anisotropy at $\delta =+28^{\lowercase{o}}$ (2000)
Romeo, G., Ali, S., Femenia, B., Limon, M., Piccirillo, L., Rebolo, R., ...
Results from the third campaign of a ground-based multi-band observation of the millimeter emission of the sky from Tenerife (Canary Islands) are presented. The instrument consists of a 0.45 meter...
A New Spin on Galactic Dust (2000)
Tegmark, Max, Finkbeiner, Douglas P., Davies, R. D., Gutierrez, Carlos M., Haffner, L. M., ...
We present a new puzzle involving Galactic microwave emission and attempt to resolve it. On one hand, a cross-correlation analysis of the WHAM H-alpha map with the Tenerife 10 and 15 GHz maps shows...
Prieto, C. Allende, Rebolo, R., Lopez, R. J. Garcia, Serra-Ricart, M., Beers, T. C., Rossi, S., ...
With the dual aims of enlarging the list of extremely metal-poor stars identified in the Galaxy, and boosting the numbers of moderately metal-deficient stars in directions that sample the rotational...
A measurement at the first acoustic peak of the CMB with the 33 GHz interferometer (2000)
Harrison, D. L., Rubino-Martin, J. A., Melhuish, S. J., Watson, R. A., Davies, R. D., Rebolo, R., ...
This paper presents the results from the Jodrell Bank-IAC two-element 33 GHz interferometer operated with an element separation of 32.9 wavelengths and hence sensitive to 1 deg scale structure on the...
On the Interpretation of the Optical Spectra of L-type Dwarfs (2000)
Pavlenko, Ya., Osorio, M. R. Zapatero, Rebolo, R.
We present synthetic optical spectra in the range 640-930 nm of a sample of field L dwarfs and the brown dwarf GL229B. Our computations show that Li, Na, K, Rb, and Cs govern the spectra of these...
Osorio, M. R. Zapatero, Bejar, V. J. S., Rebolo, R., Martin, E. L., Basri, G.
We present J-band photometry and low-resolution optical spectroscopy (600-1000 nm) for one of the faintest substellar member candidates in the young sigma Ori cluster, SOri 47 (I=20.53, Bejar et al....
CMB observations with the Jodrell Bank - IAC interferometer at 33 GHz (1999)
Dicker, S. R., Melhuish, S. J., Davies, R. D., Gutierrez, C. M., Rebolo, R., Harrison, D. L., ...
The paper presents the first results obtained with the Jodrell Bank - IAC two-element 33 GHz interferometer. The instrument was designed to measure the level of the Cosmic Microwave Background (CMB)...
A 33 GHz interferometer for CMB observations on Tenerife (1999)
Melhuish, S. J., Dicker, S., Davies, R. D., Gutierrez, C. M., Watson, R. A., Davis, R. J., ...
We describe a new high sensitivity experiment for observing cosmic microwave background (CMB) anisotropies. The instrument is a 2-element interferometer operating at 33 GHz with a ~3 GHz bandwidth....
Cross-correlation of Tenerife data with Galactic templates - evidence for spinning dust? (1999)
Tegmark, Max, Gutierrez, Carlos M., Jones, Aled W., Davies, R. D., Lasenby, A. N., ...
The recent discovery of dust-correlated diffuse microwave emission has prompted two rival explanations: free-free emission and spinning dust grains. We present new detections of this component at 10...
Cosmic Microwave background map making with data between 10 and 90GHz (1999)
Jones, A. W., Lasenby, A. N., Mukherjee, P., Gutierrez, C. M., Davies, R. D., Watson, R. A., ...
We use data from the Tenerife 10, 15 and 33 GHz beamswitching experiments along with the COBE 53 and 90 GHz data to separate the cosmic microwave background (CMB) signal from the Galactic signal and...
A Search for Very Low-mass Stars and Brown Dwarfs in the Young sigma Orionis Cluster (1999)
Bejar, V. J. S., Osorio, M. R. Zapatero, Rebolo, R.
We present a CCD-based photometric survey covering 870 sq. arcmin in a young stellar cluster around the young multiple star sigma Orionis. Our survey limiting R, I, and Z magnitudes are 23.2, 21.8,...
Discovery of a Low-Mass Brown Dwarf Companion of the Young Nearby Star G196-3 (1998)
Rebolo, R., Osorio, M. R. Zapatero, Madruga, S., Bejar, V. J. S., Arribas, S., Licandro, J.
A substellar-mass object in orbit at about 300 astronomical units (AU) from the young low-mass star G196-3 was detected by direct imaging. Optical and infrared photometry and low- and...
Discovery of a Very Low-Mass Binary with HST/NICMOS (1998)
Martin, E. L., Basri, G., Brandner, W., Bouvier, J., R., Zapatero Osorio M., Rebolo, R., ...
Hubble Space Telescope NICMOS observations are presented of six brown dwarf candidates in the Pleiades open cluster. One of them, namely CFHT-Pl-18, is clearly resolved as a binary with an angular...
Brown Dwarfs in the Pleiades Cluster. III. A deep IZ survey (1998)
Osorio, M. R. Zapatero, Rebolo, R., Martin, E. L., Hodgkin, S. T., Cossburn, M. R., Magazzu, A., ...
We present the results of a deep CCD-based IZ photometric survey of a ~1 sq. deg area in the central region of the Pleiades Galactic open cluster. The magnitude coverage of our survey (from I~17.5...
The First L-type Brown Dwarf in the Pleiades (1998)
Martin, E. L., Basri, G., Osorio, M. R. Zapatero, Rebolo, R., Lopez, R. J. Garcia
We have obtained low-resolution optical spectra of three faint brown dwarf candidates in the Pleiades open cluster. The objects observed are Roque 12 (I=18.5), Roque 5 (I=19.7) and Roque 25 (I=21.2)....
Oxygen abundances in unevolved metal-poor stars from near-UV OH lines (1998)
Israelian, G., Lopez, R. Garcia, Rebolo, R.
We have performed a detailed oxygen abundance analysis of 23 metal-poor (-3.0
A New Pleiades Member at the Lithium Substellar Boundary (1998)
Martin, E. L., Basri, G., Gallegos, J. E., Rebolo, R., Zapatero-Osorio, M. R., Bejar, V. J. S.
We present the discovery of an object in the Pleiades open cluster, named Teide 2, with optical and infrared photometry which place it on the cluster sequence slightly below the expected substellar...
Jones, A. W., Hancock, S., Lasenby, A. N., Davies, R. D., Gutierrez, C. M., Rocha, G., ...
The complete set of data from the Tenerife 10 GHz (8 degree FWHM) twin-horn, drift scan experiment is described. These data are affected by both long-term atmospheric baseline drifts and short term...
A brown dwarf candidate in the Praesepe Open Cluster (1998)
Magazzu, A., Rebolo, R., Osorio, M. R. Zapatero, Martin, E. L., Hodgkin, S. T.
We present optical and infrared observations of RPr1, a faint (I = 21.01) and very red object (I - K = 4.57) discovered in a deep CCD survey, covering an area of 800 square arcmin of the Praesepe...
Boron in Very Metal-Poor Stars (1998)
Lopez, R. J. Garcia, Lambert, D. L., Edvardsson, B., Gustafsson, B., Kiselman, D., Rebolo, R.
We have observed the B I 2497 A line to derive the boron abundances of two very metal-poor stars selected to help in tracing the origin and evolution of this element in the early Galaxy: BD +23 3130...
Femenia, B., Rebolo, R., Gutierrez, C. M., Limon, M., Piccirillo, L.
We present the results of a Cosmic Microwave Background (CMB) anisotropy ground-based millimetric experiment sensitive to fluctuations on angular scales of $\sim 2\degg$. Four independent bands...
New Brown Dwarfs in the Pleiades Cluster (1997)
Osorio, M. R. Zapatero, Rebolo, R., Martin, E. L., Basri, G., Magazzu, A., Hodgkin, S. T., ...
We present intermediate and low resolution optical spectroscopy (650-915 nm) of seven faint, very red objects (20 > I >= 17.8, I-Z >= 0.5) discovered in a CCD-based IZ survey covering an area of 1...
Beryllium, Lithium and Oxygen Abundances in F-type Stars (1997)
Lopez, R. J. Garcia, Herrera, M. C. Dominguez, Casares, C., Rasilla, J. L., Rebolo, R., ...
Beryllium and oxygen abundances have been derived in a sample of F-type field stars for which lithium abundances had been measured previously, with the aim of obtaining observational constraints to...
Studies of CMB structure at Dec=40. II: Analysis and cosmological interpretation (1997)
Hancock, S., Gutierrez, C. M., Davies, R. D., Lasenby, A. N., Rocha, G., Rebolo, R., ...
We present a detailed analysis of the cosmic microwave background structure in the Tenerife Dec=+40 degrees data. The effect of local atmospheric contributions on the derived fluctuation amplitude is...
New Cosmological Structures on Medium Angular Scales Detected with the Tenerife Experiments (1997)
Gutierrez, C. M., Hancock, S., Davies, R. D., Rebolo, R., Watson, R. A., Hoyland, R. J., ...
We present observations at 10 and 15 GHz taken with the Tenerife experiments in a band of the sky at Dec.=+35 degrees. These experiments are sensitive to multipoles in the range l=10-30. The...
Brown Dwarfs in the Pleiades Cluster. II. J, H and K photometry (1997)
Osorio, M. R. Zapatero, Martin, E. L., Rebolo, R.
We have obtained near-IR observations of some of the faintest objects so far known towards the Pleiades cluster, with the aim of investigating the sequence that connects cluster very low-mass (VLM)...
New cosmological structures on medium angular scales detected with the Tenerife experiments (1997)
Gutierrez, CM, Hancock, S, Davies, RD, Rebolo, R, Watson, RA, Hoyland, RJ, ...
Millimetric Ground-based Observations of Cosmic Microwave Background Anisotropy (1996)
Piccirillo, L., Femenia, B., Kachwala, N., Rebolo, R., Limon, M., Guttierrez, C. M., ...
First results of a Cosmic Microwave Background (CMB) anisotropy experiment conducted at the Observatorio del Teide (Tenerife, Spain) are presented. The instrument is a four channel (3.1, 2.1, 1.3 and...
Brown Dwarfs in the Pleiades Cluster Confirmed by the Lithium Test (1996)
Rebolo, R., Martin, E. L., Basri, G., Marcy, G. W., Osorio, M. R. Zapatero
We present 10 m Keck spectra of the two Pleiades brown dwarfs Teide 1 and Calar 3 showing a clear detection of the 670.8 nm Li resonance line. In Teide 1, we have also obtained evidence for the...
Brown Dwarfs in the Pleiades Cluster: a CCD-based R,I survey (1996)
Osorio, M. R. Zapatero, Rebolo, R., Martin, E. L.
We have obtained deep CCD R and I mosaic imaging of 578 arcmin$^{2}$ within 1$^{\circ}$.5 of the Pleiades' center -- reaching a completeness magnitude I=19.5 -- with the aim of finding free-floating...
Martin, E. L., Rebolo, R., Osorio, M. R. Zapatero
We present optical and near-IR spectroscopy (600--1000 nm) of 8 faint (I$>$18) very red (R--I$>$2.2) objects discovered in a deep CCD survey of the Pleiades (Zapatero-Osorio et al. 1996). We compare...
Stars Approaching the Substellar Limit in the alpha Persei Open Cluster (1995)
Osorio, M. R. Zapatero, Rebolo, R., Martin, E. L., Lopez, R. J. Garcia
We present intermediate dispersion optical spectroscopy for seven very low-mass stars in the alpha Per open cluster with spectral types between M3 and M6, including the brown dwarf candidate of...
Comparison of the COBE DMR and Tenerife Data (1994)
Lineweaver, C. H., Hancock, S., Smoot, G. F., Lasenby, A. N., Davies, R. D., Banday, A. J., ...
We have compared the Tenerife data with the {\it COBE} DMR two-year data in the declination +40\deg region of the sky observed by the Tenerife experiment. Using the Galactic plane signal at $\sim 30$...
Lithium and the Nature of Brown Dwarf Candidates (1994)
Rebolo, R., Magazzu, A., Martin, E. L.
This paper discusses the ability of Li to confirm the substellar nature of a brown dwarf candidate. Theoretical computations using different interior models agree that brown dwarfs with masses below...
Constraints to the Masses of Brown Dwarf Candidates from the Lithium Test (1994)
Martin, E. L., Rebolo, R., Magazzu, A.
We present intermediate dispersion (0.7-2.2 \AA ~pix$^{-1}$) optical spectroscopic observations aimed at applying the ``Lithium Test'' to a sample of ten brown dwarf candidates located in the general...
Pre-main sequence lithium burning. I. Weak T Tauri stars (1993)
Martin, E. L., Rebolo, R., Magazzu, A., Pavlenko, Ya. V.
We derive lithium abundances in 53 T Tauri stars (TTS), concentrating on weak-line TTS. Our study gives the following results: 1)At luminosities $\ge 0.9 L\sun$ the Li abundances are remarkably...