A Multi-Color Optical Survey of the Orion Nebula Cluster. Part I: the Catalog (2009)
Da Rio, Nicola, Robberto, Massimo, Soderblom, David R., Panagia, Nino, Hillenbrand, Lynne A., Palla, Francesco, ...
We present U, B, V, I broad-band, 6200A TiO medium-band and Halpha photometry of the Orion Nebula Cluster obtained with the WFI imager at the ESO/MPI 2.2 telescope. The nearly-simultaneous...
The influence of magnetic fields on the thermodynamics of primordial star formation (2009)
Schleicher, Dominik R. G., Galli, Daniele, Glover, Simon C. O., Banerjee, Robi, Palla, Francesco, Schneider, Raffaella, ...
We explore the effects of magnetic energy dissipation on the formation of the first stars. For this purpose, we follow the evolution of primordial chemistry in the presence of magnetic fields in the...
Properties of Protostars in the Elephant Trunk in the Globule IC 1396A (2009)
Reach, William T., Faied, Dohy, Rho, Jeonghee, Boogert, Adwin, Tappe, Achim, Jarrett, Thomas H., ...
Extremely red objects, identified in the early Spitzer Space Telescope observations of the bright-rimmed globule IC 1396A and photometrically classified as Class I protostars and Class II T Tauri...
Properties of protostars in the Elephant Trunk globule IC 1396A (2008)
Reach, William T., Faied, Dohy, Rho, Jeonghee, Boogert, Adwin, Tappe, Achim, Jarrett, Thomas H., ...
Extremely red objects, identified in the early Spitzer Space Telescope observations of the bright-rimmed globule IC 1396A and photometrically classified as Class I protostars Class II T Tauri stars...
Astronomy And Astrophysics (2007)
The Onset, Leonardo Testi, Francesco Palla, Antonella Natta
. The large body of near infrared observations presented in Testi et al. (1997; 1998) are analysed with the aim of characterizing the young stellar clusters surrounding Herbig Ae/Be stars. The...
A search for clustering around Herbig Ae/Be stars (2007)
Leonardo Testi, Francesco Palla, Timo Prusti, Antonella Natta, Silvia Maltagliati
. We present the results of new near-infrared observations of the fields around a sample of 19 Herbig Ae/Be stars. The observations reveal the population of young stars that accompanies the formation...
IRAS 23385+6053: A Prototype Massive Class 0 Object (2007)
Sergio Molinari, Leonardo Testi, Riccardo Cesaroni, Francesco Palla
IRAS 23385+6053 is a Young Stellar Object with luminosity ¸ 1:6 \Theta 10 4 L fi at a kinematic distance of 4.9 kpc. This candidate precursor of an ultracompact Hii region is associated with a...
A search for clustering around Herbig Ae/Be stars (2007)
Ii Atlas, Leonardo Testi, Francesco Palla, Antonella Natta
. We present large field infrared images of a sample of 45 Herbig Ae/Be stars. Stellar parameters, such as age and mass, have been derived for all of them in a consistent way. The images have been...
IRAS 23385+6053: A Prototype Massive Class 0 Object (2007)
Sergio Molinari, Leonardo Testi, Riccardo Cesaroni, Francesco Palla
IRAS 23385+6053 is a Young Stellar Object with luminosity ¸ 1:6 \Theta 10 4 L fi at a kinematic distance of 4.9 kpc. This candidate precursor of an ultracompact Hii region is associated with a...
Max Tegmark, Joseph Silk, Martin J. Rees, Alain Blanchard, Francesco Palla, Fohringer Ring, ...
The minimum mass that a virialized gas cloud must have in order to be able to cool in a Hubble time is computed, using a detailed treatment of the chemistry of molecular hydrogen. With a simple model...
X-Rays From Massive OB Stars: Thermal Emission From Radiative Shocks (2007)
Zhekov, Svetozar A., Palla, Francesco
Chandra gratings spectra of a sample of 15 massive OB stars were analyzed under the basic assumption that the X-ray emission is produced in an ensemble of shocks formed in the winds driven by these...
X-ray emission from the young brown dwarfs of the Taurus Molecular Cloud (2007)
Grosso, Nicolas, Briggs, Kevin, Güdel, Manuel, Guieu, Sylvain, Franciosini, Elena, Palla, Francesco, ...
AIMS. We report the X-ray properties of young (~3 Myr) bona fide brown dwarfs (BDs) of the Taurus Molecular Cloud (TMC). METHODS. The XMM-Newton Extended Survey of the TMC (XEST) is a large program...
New Pre-Main Sequence Candidates in the Taurus-Auriga Star Forming Region (2007)
Scelsi, Luigi, Maggio, Antonio, Micela, Giuseppina, Pillitteri, Ignazio, Stelzer, Beate, Briggs, Kevin, ...
We have studied the X-ray source population of the Taurus Molecular Cloud (TMC) to search for new members of the Taurus-Auriga star forming region. Candidate members have been selected among the...
X-ray emission from the young brown dwarfs of the Taurus Molecular Cloud (2007)
Grosso, Nicolas, Briggs, Kevin, Güdel, Manuel, Guieu, Sylvain, Franciosini, Elena, Palla, Francesco, ...
AIMS. We report the X-ray properties of young (~3 Myr) bona fide brown dwarfs (BDs) of the Taurus Molecular Cloud (TMC). METHODS. The XMM-Newton Extended Survey of the TMC (XEST) is a large program...
New Pre-Main Sequence Candidates in the Taurus-Auriga Star Forming Region (2007)
Scelsi, Luigi, Maggio, Antonio, Micela, Giuseppina, Pillitteri, Ignazio, Stelzer, Beate, Briggs, Kevin, ...
We have studied the X-ray source population of the Taurus Molecular Cloud (TMC) to search for new members of the Taurus-Auriga star forming region. Candidate members have been selected among the...
The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) (2006)
Güdel, Manuel, Briggs, Kevin, Arzner, Kaspar, Audard, Marc, Bouvier, Jérôme, Feigelson, Eric, ...
(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray...
X-ray emission from the young brown dwarfs of the Taurus Molecular Cloud (2006)
Grosso, Nicolas, Briggs, Kevin, Güdel, Manuel, Guieu, Sylvain, Franciosini, Elena, Palla, Francesco, ...
AIMS. We report the X-ray properties of young (~3 Myr) bona fide brown dwarfs (BDs) of the Taurus Molecular Cloud (TMC). METHODS. The XMM-Newton Extended Survey of the TMC (XEST) is a large program...
X-ray emission from the young brown dwarfs of the Taurus Molecular Cloud (2006)
Grosso, Nicolas, Briggs, Kevin, Güdel, Manuel, Guieu, Sylvain, Franciosini, Elena, Palla, Francesco, ...
AIMS. We report the X-ray properties of young (~3 Myr) bona fide brown dwarfs (BDs) of the Taurus Molecular Cloud (TMC). METHODS. The XMM-Newton Extended Survey of the TMC (XEST) is a large program...
The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) (2006)
Güdel, Manuel, Briggs, Kevin, Arzner, Kaspar, Audard, Marc, Bouvier, Jérôme, Feigelson, Eric, ...
(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray...
New Pre-Main Sequence Candidates in the Taurus-Auriga Star Forming Region (2006)
Scelsi, Luigi, Maggio, Antonio, Micela, Giuseppina, Pillitteri, Ignazio, Stelzer, Beate, Briggs, Kevin, ...
We have studied the X-ray source population of the Taurus Molecular Cloud (TMC) to search for new members of the Taurus-Auriga star forming region. Candidate members have been selected among the...
New Pre-Main Sequence Candidates in the Taurus-Auriga Star Forming Region (2006)
Scelsi, Luigi, Maggio, Antonio, Micela, Giuseppina, Pillitteri, Ignazio, Stelzer, Beate, Briggs, Kevin, ...
We have studied the X-ray source population of the Taurus Molecular Cloud (TMC) to search for new members of the Taurus-Auriga star forming region. Candidate members have been selected among the...
The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) (2006)
Güdel, Manuel, Briggs, Kevin, Arzner, Kaspar, Audard, Marc, Bouvier, Jérôme, Feigelson, Eric, ...
(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray...
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
Stellar evolution before the ZAMS (2005)
Young stars on their way to the ZAMS evolve in significantly different ways depending on mass. While the theoretical and observational properties of low- and intermediate-mass stars are rather well...
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
Pulsations induced by deuterium-burning in young brown dwarfs (2005)
Palla, Francesco, Baraffe, Isabelle
Very low-mass stars and brown dwarfs can undergo pulsational instability excited by central deuterium burning during the initial phases of their evolution. We present the results of evolutionary and...
Pulsating young brown dwarfs (2005)
Palla, Francesco, Baraffe, Isabelle
We present the results of a nonadiabatic, linear stability analysis of models of very low-mass stars (VLMSs) and brown dwarfs (BDs) during the deuterium burning phase in the center. We find unstable...
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
COUP census of X-ray stars in BN-KL and OMC-1S (2005)
Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Townsley, Leisa, Broos, Patrick, Flaccomio, Ettore, ...
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 behind the Orion Nebula Cluster (ONC), as seen in the exceptionally deep (~10...
Current views on low-mass star formation (2004)
Palla, Francesco, Randich, Sofia
The process that leads to the formation and early evolution of low-mass stars is in a broad sense well understood theoretically and carefully traced observationally. The largest uncertainties in this...
Age spreads in clusters and associations: the lithium test (2004)
Palla, Francesco, Randich, Sofia
We report the evidence that several low-mass stars (
The Pre--Main-Sequence of A-type stars (2004)
Marconi, Marcella, Palla, Francesco
Young A-type stars in the pre--main-sequence (PMS) evolutionary phase are particularly interesting objects since they cover the mass range (1.5-4 solar ma sses) which is most sensitive to the...
Dispersion in the lifetime and accretion rate of T Tauri discs (2003)
Armitage, Philip J., Clarke, Cathie J., Palla, Francesco
We compare evolutionary models for protoplanetary discs that include disc winds with observational determinations of the disc lifetime and accretion rate in Taurus. Using updated estimates for...
Star Formation in Space and Time: Taurus-Auriga (2002)
Palla, Francesco, Stahler, Steven W.
To understand the formation of stellar groups, one must first document carefully the birth pattern within real clusters and associations. In this study of Taurus-Auriga, we combine pre-main-sequence...
NGC 3603 - a local template for massive young clusters (2002)
Brandl, Bernhard R., Brandner, Wolfgang, Eisenhauer, Frank, Moffat, Anthony F. J., Palla, Francesco, Zinnecker, Hans
We present a study of the star cluster associated with the massive Galactic HII region NGC 3603 based on near-IR broad- and narrowband observations taken with ISAAC/VLT under excellent seeing...
Binary Masses as a Test for Pre-Main-Sequence Models (2001)
Palla, Francesco, Stahler, Steven W.
Observations of binaries have traditionally provided the means for ascertaining stellar masses. Here, we use the published data on 8 pre-main-sequence pairs to gauge the accuracy of our own, recently...
Lorenzani, Andrea, Palla, Francesco
We present the initial results of a study aimed at computing the global effects of the X-ray ionization due to young stars within a molecular cloud that forms stars with a standard IMF at a rate...
The Onset of Cluster Formation around Intermediate Mass Stars (2000)
Testi, Leonardo, Palla, Francesco, Natta, Antonella
We present the results of a recent near-infrared survey of the fields surrounding a large sample of intermediate-mass pre-main-sequence (Herbig Ae/Be) stars. While late-type Be and Ae stars are never...
Molinari, Sergio, Brand, Jan, Cesaroni, Riccardo, Palla, Francesco
The James Clerk Maxwell Telescope has been used to obtain submillimeter and millimeter continuum photometry of a sample of 30 IRAS sources previously studied in molecular lines and centimeter radio...
IRAS 23385+6053: A Prototype Massive Class 0 Object (1998)
Molinari, Sergio, Testi, Leonardo, Brand, Jan, Cesaroni, Riccardo, Palla, Francesco
IRAS 23385+6053 is a Young Stellar Object with luminosity 16,000 solar luminosities at a kinematic distance of 4.9 kpc. This candidate precursor of an ultracompact HII region is associated with a...
Star formation in disk galaxies driven by primordial H_2 (1997)
Corbelli, Edvige, Galli, Daniele, Palla, Francesco
We show that gaseous \HI disks of primordial composition irradiated by an external radiation field can develop a multiphase medium with temperatures between 10^2 and 10^4 K due to the formation of...
How small were the first cosmological objects? (1996)
Tegmark, Max, Silk, Joseph, Rees, Martin, Blanchard, Alain, Abel, Tom, Palla, Francesco
The minimum mass that a virialized gas cloud must have in order to be able to cool in a Hubble time is computed, using a detailed treatment of the chemistry of molecular hydrogen. With a simple model...