Brown Dwarf Disks at Ages of 5-10 Myr (2009)
Riaz, B., Lodieu, N., Gizis, J. E.
We present Spitzer/IRAC and MIPS 24mu archival observations for 28 brown dwarfs in the Upper Scorpius (UppSco) region. We find a disk fraction of 10.7%^(+8.7%)_(-3.3%). One object shows a small...
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...
The Physical Properties of Four ~600 K T Dwarfs (2009)
Leggett, S. K., Cushing, Michael C., Saumon, D., Marley, M. S., Roellig, T. L., Warren, S. J., ...
We present Spitzer 7.6-14.5 μm spectra of ULAS J003402.77–005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and...
Lucky Imaging of M subdwarfs (2009)
Lodieu, N., Osorio, M. R. Zapatero, Martin, E. L.
The knowledge of the binary properties of metal-poor and solar-metallicity stars can shed light on the potential differences between the formation processes responsible for both types of objects. The...
Lodieu, N., Dobbie, P. D., Deacon, N. R., Venemans, B. P., Durant, M.
We present the discovery of two brown dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Deep Extragalactic Survey (DXS) Data Release 2. Both objects were selected photometrically from six square...
The discovery of an M4+T8.5 binary system (2009)
Burningham, Ben, Pinfield, D. J., Leggett, S. K., Tinney, C. G., Liu, M. C., Homeier, D., ...
We report the discovery of a T8.5 dwarf, which is a companion to the M4 dwarf Wolf 940. At a distance of 12.50 (+0.75,-0.67) pc, the angular separation of 32arcsec corresponds to a projected...
The Physical Properties of Four ~600K T Dwarfs (2009)
Leggett, S. K., Cushing, M. C., Saumon, D., Marley, M. S., Roellig, T. L., Warren, S. J., ...
We present Spitzer 7.6-14.5um spectra of ULAS J003402.77-005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and photometry...
The physical properties of four ~600 K T dwarfs. (2009)
Leggett, S., Cushing, M.C., Saumon, D., Marley, M., Roellig, T.L., Warren, S.J., ...
Original article can be found at: http://www.iop.org/EJ/journal/apj Copyright American Astronomical Society DOI: 10.1088/0004-637X/695/2/1517 [Full text of this article is not available in the UHRA]
Identifying nearby field T dwarfs in the UKIDSS Galactic Clusters Survey (2008)
Lodieu, N., Burningham, B., Hambly, N. C., Pinfield, D. J.
We present the discovery of two new late-T dwarfs identified in the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS) Data Release 2 (DR2). These T dwarfs are nearby old T dwarfs...
Dynamical masses for the nearest brown dwarf binary: Epsilon Indi Ba, Bb (2008)
Cardoso, C. V., McCaughrean, M. J., King, R. R., Close, L. M., Lenzen, R., ...
We present preliminary astrometric results for the closest known brown dwarf binary to the Sun: Epsilon Indi Ba, Bb at a distance of 3.626 pc. Via ongoing monitoring of the relative separation of the...
Cool White Dwarfs Identified in the Second Data Release of the UKIRT Infrared Deep Sky Survey (2008)
Lodieu, N., Leggett, S. K., Bergeron, P., Nitta, A.
We have paired the Second Data Release of the Large Area Survey of the UKIRT Infrared Deep Sky Survey with the Fifth Data Release of the Sloan Digital Sky Survey to identify ten cool white dwarf...
A PHOTOMETRIC STUDY OF THE YOUNG CLUSTER COLLINDER 359 (2008)
N. Lodieu, J. Bouvier, M. J. Mccaughrean
We present the first deep optical wide-field imaging survey of the young open cluster Collinder 359, complemented by near-infrared follow-up observations. We have surveyed 1.6 square degree in the...
Kharchenko, N. V., Lodieu, N., McCaughrean, M. J.
(abridged) We describe the discovery of an extremely wide pair of low-mass stars with a common large proper motion and discuss their possible membership in a Galactic halo stream crossing the Solar...
Exploring the substellar temperature regime down to ~550K (2008)
Burningham, Ben, Pinfield, D. J., Leggett, S. K., Tamura, M., Lucas, P. W., Homeier, D., ...
We report the discovery of three very late T dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Third Data Release: ULAS J101721.40+011817.9 (ULAS1017), ULAS J123828.51+095351.3 (ULAS1238) and...
Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey (2008)
Pinfield, D. J., Burningham, B., Tamura, M., Leggett, S. K., Lodieu, N., Lucas, P. W., ...
We present the discovery of fifteen new T2.5-T7.5 dwarfs (with estimated distances between ~24-93pc, identified in the first three main data releases of the UKIRT Infrared Deep Sky Survey. This...
Jameson, R. F., Lodieu, N., Casewell, S. L., Bannister, N. P., Dobbie, P. D.
We present a new method to derive the age of young (
Properties of the Coolest Dwarfs. (2008)
Leggett, S., Freedman, R., Geballe, T., Golimowski, D., Lodieu, N., Marley, M., ...
Lodieu, N., Hambly, N. C., Jameson, R. F., Hodgkin, S. T.
We present near-infrared (1.15-2.50 microns) medium-resolution (R = 1700) spectroscopy of a sample of 23 brown dwarf candidates in the young Upper Sco association. We confirm membership of 21 brown...
Proper motions of field L and T dwarfs (2007)
Jameson, R. F., Casewell, S. L., Bannister, N. P., Lodieu, N., Keresztes, K., Dobbie, P. D., ...
The proper motion measurements for 143 previously known L and T dwarfs are presented. From this sample we identify and discuss 8 high velocity L dwarfs. We also find 4 new wide common proper motion...
A very cool brown dwarf in UKIDSS DR1 (2007)
Warren, S. J., Mortlock, D. J., Leggett, S. K., Pinfield, D. J., Homeier, D., Dye, S., ...
(abridged) We report the discovery of a very cool brown dwarf, ULAS J003402.77-005206.7 (ULAS J0034-00), identified in UKIDSS DR1. We provide optical, near-infrared, and mid-infrared photometry of...
Lodieu, N., Dobbie, P. D., Deacon, N. R., Hodgkin, S. T., Hambly, N. C., Jameson, R. F.
We present the results of a deep wide-field near-infrared survey of 12 square degrees of the Pleiades conducted as part of the UKIDSS Deep Infrared Sky Survey (UKIDSS) Galactic Cluster Survey (GCS)....
Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS Large Area Survey Data Release 1 (2007)
Lodieu, N., Pinfield, D. J., Leggett, S. K., Jameson, R. F., Mortlock, D. J., Warren, S. J., ...
We present eight new T4.5-T7.5 dwarfs identified in the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) Data Release 1 (DR1). In addition we have recovered the T4.5 dwarf SDSS...
Proper motion L and T dwarf candidate members of the Pleiades (2007)
Casewell, S. L., Dobbie, P. D., Hodgkin, S. T., Moraux, E., Jameson, R. F., Hambly, N. C., ...
We present the results of a deep optical-near-infrared multi-epoch survey covering 2.5 square degrees of the Pleiades open star cluster to search for new very-low-mass brown dwarf members. A...
Two T dwarfs from the UKIDSS Early Data Release (2007)
Kendall, T. R., Tamura, M., Tinney, C. G., Martin, E. L., Ishii, M., Pinfield, D. J., ...
We report on the first ultracool dwarf discoveries from the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey Early Data Release (LAS EDR), in particular the discovery of T dwarfs which are...
Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS large area survey data release 1. (2007)
Lodieu, N., Pinfield, D.J., Leggett, S., Jameson, R.F., Mortlock, D.J., Warren, S.J.
A very cool brown dwarf in UKIDSS DR1. (2007)
Warren, S.J., Mortlock, D.J., Leggett, S., Pinfield, D.J., Homeier, D., Dye, S., ...
The Origins of the Ultramassive White Dwarf GD50. (2007)
Dobbie, P.D., Napiwotzki, R., Lodieu, N., Burleigh, M.R., Barstow, M.A., Jameson, R.F.
The UKIRT infrared deep sky survey early data release (2006)
Dye, S., Warren, S.J., Hambly, N.C., Cross, N.J.G., Hodgkin, S.T., Irwin, M.J., ...
This paper defines the UKIRT Infrared Deep Sky Survey (UKIDSS) Early Data Release (EDR). UKIDSS is a set of five large near-infrared surveys being undertaken with the United Kingdom Infrared...
New brown dwarfs in Upper Sco using UKIDSS Galactic Cluster Survey science verification data (2006)
Lodieu, N., Hambly, N. C., Jameson, R. F., Hodgkin, S. T., Carraro, G., Kendall, T. R.
We present first results from a deep (J = 18.7), wide-field (6.5 square degrees) infrared (ZYJHK) survey in the Upper Sco association conducted within the science verification phase of the UKIRT...
New members in the Upper Sco association from the UKIDSS Early Data Release (2006)
Lodieu, N., Hambly, N. C., Jameson, R. F.
We present the results of a 9.3 square degree infrared (ZYJHK) survey in the Upper Scorpius association extracted from the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Cluster Survey Early Data...
On the origin of the ultramassive white dwarf GD50 (2006)
Dobbie, P. D., Napiwotzki, R., Lodieu, N., Burleigh, M. R., Barstow, M. A., Jameson, R. F.
We argue on the basis of astrometric and spectroscopic data that the ultramassive white dwarf GD50 is associated with the star formation event that created the Pleiades and is possibly a former...
The UKIRT Infrared Deep Sky Survey (UKIDSS) (2006)
Lawrence, A., Warren, S. J., Almaini, O., Edge, A. C., Hambly, N. C., Jameson, R. F., ...
We describe the goals, design, implementation, and initial progress of the UKIRT Infrared Deep Sky Survey (UKIDSS), a seven year sky survey which began in May 2005, using the UKIRT Wide Field Camera....
A deep wide-field optical survey in the young open cluster Collinder 359 (2006)
Lodieu, N., Bouvier, J., James, D. J., Palla, F., McCaughrean, M. J., ...
We present the first deep, optical, wide-field imaging survey of the young open cluster Collinder 359, complemented by near-infrared follow-up observations. This study is part of a large programme...
On the origin of the ultramassive white dwarf GD50 (2006)
Dobbie, P.D., Napiwotzki, R., Lodieu, N., Burleigh, Matthew R., Barstow, Martin A., Jameson, Richard F.
Accepted for publication in Monthly Notices of the Royal Astronomical Society
On the origin of the ultramassive white dwarf GD 50. (2006)
Dobbie, P.D., Napiwotzki, R., Lodieu, N., Burleigh, M.R., Barstow, M.A., Jameson, R.F.
Exploring the Lower Mass Function in the young open Cluster IC 4665 (2005)
De Wit, W. J., Bouvier, J., Palla, F., James, D. J., Kendall, T. R., ...
We present a study of the young (30-100Myr) open cluster IC 4665 with the aim to determine the shape of the mass function well into the brown dwarf regime. We photometrically select 691 low-mass...
Spectroscopic classification of red high proper motion objects in the Southern Sky (2005)
Lodieu, N., McCaughrean, M. J., Ibata, R., Irwin, M., Zinnecker, H.
We present the results of spectroscopic follow-up observations for a sample of 71 red objects with high proper motions in the range 0.08-1.14 arcsec/yr as detected using APM and SSS measurements of...
A near-infrared survey for new low-mass members in Alpha Per (2005)
Lodieu, N., McCaughrean, M. J., Navascues, D. Barrado Y, Bouvier, J., Stauffer, J. R.
We present a near-infrared (K'-band) survey of 0.7 square degree area in the Alpha Persei open cluster (age = 90 Myr, distance = 182 pc) carried out with the Omega-Prime camera on the Calar Alto...
SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf (2004)
Lodieu, N., McCaughrean, M. J.
We present the discovery of a new extreme high proper motion object (3.5 arcsec/year) which we classify as an ultracool subdwarf with [M/H] = -0.5. It has a formal spectral type of sdM9 but also...
GRB 011121: Jet, wind and supernova – all in one (2004)
Greiner, J., Klose, S., Salvato, M., Zeh, A., Schwarz, R., Hartmann, D. H., ...
ε Indi Ba, Bb: The nearest binary brown dwarf (2004)
McCaughrean, M. J., Close, L. M., Lenzen, R., Biller, B., Brandner, W., ...
We have carried out high angular resolution near-infrared imaging and low-resolution (Rsim;1000) spectroscopy of the nearest known brown dwarf, \varepsilon Indi B, using the ESO VLT NAOS/CONICA...
An active M8.5 dwarf wide companion to the M4/DA binary LHS4039/LHS4040 (2003)
Lodieu, N., Ibata, R., Bienaymé, O., Irwin, M., McCaughrean, M. J., ...
Low-mass and brown dwarfs have recently been found as wide companions to many nearby stars, formerly believed to be single. Wide binaries are usually found as common proper motion pairs. Sometimes,...
GRB 011121: A collimated outflow into wind-blown surroundings (2003)
Greiner, J., Klose, S., Salvato, M., Zeh, A., Schwarz, R., Hartmann, D. H., ...
We discover a break in the GRB 011121 afterglow light curve after 1.3 days, which implies an initial jet opening angle of about 9 deg. The SED during the first four days is achromatic, and supports...
Epsilon Indi Ba/Bb: the nearest binary brown dwarf (2003)
McCaughrean, M. J., Close, L. M., Lenzen, R., Biller, B., Brandner, W., ...
We have carried out high angular resolution near-infrared imaging and low-resolution (R~1000) spectroscopy of the nearest known brown dwarf, Eps Indi B, using the ESO VLT NAOS/CONICA adaptive optics...
GRB 011121: A Collimated Outflow into Wind-blown Surroundings (2003)
Greiner, J., Klose, S., Salvato, M., Zeh, A., Schwarz, R., Hartmann, D.H., ...
GRB 011121: A Collimated Outflow into Wind-blown Surroundings (2003)
Greiner, J., Klose, S., Salvato, M., Zeh, A., Schwartz, R., Hartmann, D.H., ...
We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the afterglow light curve after 1.3 days, which...
GRB 011121 : a collimated outflow into wind-blown surroundings (2003)
Greiner, J., Klose, S., Salvato, M., Zeh, A., Schwarz, R., Hartmann, D. H., ...
Epsilon Indi B: a new benchmark T dwarf (2002)
McCaughrean, M. J., Lodieu, N., Kuhlbrodt, B.
We have identified a new early T dwarf only 3.6pc from the Sun, as a common proper motion companion (separation 1459AU) to the K5V star Epsilon Indi (HD209100). As such, Epsilon Indi B is one of the...
Discovery of three nearby L dwarfs in the Southern Sky (2002)
Lodieu, N., McCaughrean, M. J.
We report the discovery of three L dwarfs in the solar vicinity within 30 parsecs. These objects were originally found as proper motion objects from a combination of R and I photographic plates...