Noel, Noelia E. D., Aparicio, Antonio, Gallart, Carme, Hidalgo, Sebastian L., Costa, Edgardo, Mendez, Rene A.
We present a quantitative analysis of the SFH of 12 fields in the SMC. We find that there are four main periods of enhancement of star formation: a young one peaked at around 0.2-0.5 Gyr old, only...
The ACS Nearby Galaxy Survey Treasury (2009)
Dalcanton, Julianne J., Williams, Benjamin F., Seth, Anil C., Dolphin, Andrew, Holtzman, Jon, Rosema, Keith, ...
The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D14...
Bernard, Edouard J., Monelli, Matteo, Gallart, Carme, Drozdovsky, Igor, Stetson, Peter B., Aparicio, Antonio, ...
(abridged) We present the first study of the variable star populations in the isolated dwarf spheroidal galaxies (dSph) Cetus and Tucana. Based on Hubble Space Telescope images obtained with the...
The ACS Nearby Galaxy Survey Treasury I. The Star Formation History of the M81 Outer Disk (2008)
Williams, Benjamin F., Dalcanton, Julianne J., Seth, Anil C., Weisz, Daniel, Dolphin, Andrew, Skillman, Evan, ...
The ACS Nearby Galaxy Survey Treasury (ANGST) is a large Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) treasury program to obtain resolved stellar photometry for a volume-limited...
The Chemical Enrichment History of the Small Magellanic Cloud and Its Gradients (2008)
Carrera, Ricardo, Gallart, Carme, Aparicio, Antonio, Costa, Edgardo, Méndez, Rene A., Noël, Noelia E. D.
We present stellar metallicities derived from Ca II triplet spectroscopy in over 350 red giant branch stars in 13 fields distributed in different positions in the SMC, ranging from $\sim$1\arcdeg\@...
Matching the Local and Cosmic Star Formation Histories (2008)
Drozdovsky, Igor, Hopkins, Andrew M., Aparicio, Antonio, Gallart, Carme, Team, The LCID
Given the many recent advances in our understanding of the star formation history (SFH) of the Local Group and other nearby galaxies, and in the evolution of star formation with redshift, we present...
Bernard, Edouard J., Gallart, Carme, Monelli, Matteo, Aparicio, Antonio, Cassisi, Santi, Skillman, Evan D., ...
We present a study of the radial distribution of RR Lyrae variables, which present a range of photometric and pulsational properties, in the dwarf spheroidal galaxy Tucana. We find that the fainter...
The Chemical Enrichment History of the Large Magellanic Cloud (2007)
Carrera, Ricardo, Gallart, Carme, Hardy, Eduardo, Aparicio, Antonio, Zinn, Robert
Ca II triplet spectroscopy has been used to derive stellar metallicities for individual stars in four LMC fields situated at galactocentric distances of 3\arcdeg, 5\arcdeg, 6\arcdeg\@ and 8\arcdeg\@...
Stellar Populations in the Outskirts of the Small Magellanic Cloud: No Outer Edge Yet (2007)
We report the detection of intermediate-age and old stars belonging to the SMC at 6.5 kpc from the SMC center in the southern direction. We show, from the analysis of three high quality 34\arcmin...
Bernard, Edouard J., Aparicio, Antonio, Gallart, Carme, Padilla-Torres, Carmen P., Panniello, Maurizio
We present resolved-star VI photometry of the Local Group dwarf irregular galaxy IC1613 reaching I~23.5, obtained with the wide-field camera at the 2.5m Isaac Newton Telescope. A fit to the stellar...
The Infrared Ca II triplet as metallicity indicator (2007)
Carrera, Ricardo, Gallart, Carme, Pancino, Elena, Zinn, Robert
From observations of almost 500 RGB stars in 29 Galactic open and globular clusters, we have investigated the behaviour of the infrared Ca II triplet (8498, 8542 and 8662 \AA) in the age range...
The ACS LCID Project: overview and first results (2007)
The star formation history (SFH) of Local Group galaxies is a powerful tool for studying their evolution, including chemical enrichment histories and stellar population gradients, which in turn may...
Noel, Noelia E. D., Gallart, Carme, Costa, Edgardo, Mendez, Rene A.
We present ground-based B and R-band color-magnitude diagrams (CMDs), reaching the oldest main-sequence turnoffs with good photometric accuracy for twelve fields in the Small Magellanic Cloud (SMC)....
The Star Formation History in a SMC field: IAC-star/IAC-pop at work (2007)
Noel, Noelia E. D., Aparicio, Antonio, Gallart, Carme, Hidalgo, Sebastian L., Costa, Edgardo, Mendez, Rene A.
We present a progress report of a project to study the quantitative star formation history (SFH) in different parts of the Small Magellanic Cloud (SMC). We use the information in [(B-R), R]...
Noel, Noelia E. D., Aparicio, Antonio, Gallart, Carme, Hidalgo, Sebastian L., Carrera, Ricardo, Costa, Edgardo, ...
We present deep ground-based {\it B} and {\it R} observations of 12 fields in the Small Magellanic Cloud (SMC). The resulting color-magnitude diagrams (CMDs) reach the oldest main-sequence (MS)...
Studying galaxy formation and evolution from Local Group galaxies (2007)
In this contribution I present the main research activities of the IAC ``Stellar Populations in Galaxies'' research Group, with emphasis on the subtopics directly related with the study of the...
Noel, Noelia E. D., Gallart, Carme, Costa, Edgardo, Mendez, Rene A.
Publicación ISI
Noel, Noelia E. D., Gallart, Carme, Costa, Edgardo, Mendez, Rene A.
Publicación ISI
The stellar structures around disk galaxies (2007)
Antonio Aparicio, Carme Gallart, Edouard J. Bernard, Igor Drozdovsky, Matteo Monelli, Nikolay Tikhonov, ...
We present a brief summary of current results on the stellar distribution and population gra- dients in disk galaxies, and discuss future prospects of follow-up imaging and spectro- scopic research...
Pont, Frederic, Zinn, Robert, Gallart, Carme, Hardy, Eduardo, Winnick, Rebeccah
Near infrared spectra were obtained for 117 red giants in the Fornax dwarf spheroidal galaxy with the FORS1 spectrograph on the VLT, in order to study the metallicity distribution of the stars and to...
Spectroscopy of quest RR Lyrae variables: The new virgo stellar stream (2006)
Duffau, Sonia, Zinn, Robert, Vivas, A. Katherina, Carraro, Giovanni, Méndez, René A., Winnick, Rebeccah, ...
Eighteen RR Lyrae variables (RRLs) that lie in the "12(h).4 clump" identified by the Quasar Equatorial Survey Team ( QUEST) have been observed spectroscopically to measure their radial velocities and...
Old Main-Sequence Turnoff Photometry in the SMC (2006)
Noel, Noelia E. D., Gallart, Carme, Costa, Edgardo, Mendez, Rene A.
We present ground-based {\it B} and {\it R}-band color-magnitude diagrams (CMDs) of unprecedented depth for twelve fields in the Small Magellanic Cloud (SMC). They reach the oldest main-sequence...
Spectroscopy of QUEST RR Lyrae Variables: the new Virgo Stellar Stream (2005)
Duffau, Sonia, Zinn, Robert, Vivas, A. Katherina, Carraro, Giovanni, Mendez, Rene A., Winnick, Rebeccah, ...
Eighteen RR Lyrae variables (RRLs) that lie in the "$12\fh 4$ clump" identified by the QUEST survey have been observed spectroscopically to measure their radial velocities and metal abundances. Ten...
SMC: Stellar Populations through deep CMDs (2005)
Noel, Noelia E. D., Gallart, Carme, Costa, Edgardo, Mendez, Rene
We present deep color-magnitud diagrams (CMDs) reaching the oldest main-sequence turnoffs for 12 fields in the SMC. The {\it B}-band and {\it R}-band observations were performed using the 100-inch...
VLT Spectroscopy of RR Lyrae Stars in the Sagittarius Tidal Stream (2004)
Vivas, A. Katherina, Zinn, Robert, Gallart, Carme
Sixteen RR Lyrae variables from the QUEST survey that lie in the leading arm of the tidal stream from the Sagittarius dSph galaxy have been observed spectroscopically to measure their radial...
Pont, Frederic, Zinn, Robert, Gallart, Carme, Hardy, Eduardo, Winnick, Rebeccah
Near infrared spectra were obtained for 117 red giants in the Fornax dwarf spheroidal galaxy with the FORS1 spectrograph on the VLT, in order to study the metallicity distribution of the stars and to...
Halo Substructure in the QUEST RR Lyrae Survey (2003)
Zinn, Robert, Vivas, A. Katherina, Gallart, Carme, Winnick, Rebeccah
A survey of 380 sq. deg. of the sky with the 1m Schmidt telescope at the Observatorio Nacional de Llano del Halo and the QUEST camera has found 498 RR Lyrae variables lying from 4 to 60 kpc from the...
Velocities of RR Lyrae Stars in the Sagittarius Tidal Stream (2003)
Vivas, A. Katherina, Zinn, Robert, Gallart, Carme
We have measured radial velocities and metallicities of 16 RR Lyrae stars, from the QUEST survey, in the Sagittarius tidal stream at 50 kpc from the galactic center. The distribution of velocities is...
The Stellar Content of M31's Bulge (2003)
Stephens, Andrew W., Frogel, Jay A., DePoy, D. L., Freedman, Wendy, Gallart, Carme, Jablonka, Pascale, ...
In this paper we analyze the stellar populations present in M31 using nine sets of adjacent HST-NICMOS Camera 1 and 2 fields with galactocentric distances ranging from 2' to 20'. These infrared...
Pont, Frederic, Zinn, Robert, Gallart, Carme, Hardy, Eduardo, Winnick, Rebeccah
Near infrared spectra were obtained for 117 red giants in the Fornax dwarf spheroidal galaxy with the FORS1 spectrograph on the VLT, in order to study the metallicity distribution of the stars and to...
Pont, Frederic, Zinn, Robert, Gallart, Carme, Hardy, Eduardo, Winnick, Rebeccah
Near infrared spectra were obtained for 117 red giants in the Fornax dwarf spheroidal galaxy with the FORS1 spectrograph on the VLT, in order to study the metallicity distribution of the stars and to...
The star formation history of resolved galaxies: Composite H-R diagram (2000)
I discuss the information provided by color-magnitude diagrams of different absolute magnitude limits in the study of the star formation histories of nearby galaxies. I review the recent progress...
The Star Formation History of the Local Group dwarf galaxy Leo I (1999)
Gallart, Carme, Freedman, Wendy, Aparicio, Antonio, Bertelli, Gianpaolo, Chiosi, Cesare
We present a quantitative analysis of the star formation history (SFH) of the Local Group dSph galaxy Leo I, from the information in its HST [(V-I),I] color-magnitude diagram (CMD). The method we use...
The huge photometric databases that are being created for stars in the Magellanic Clouds and in Local Group galaxies not only allow detailed study of the star formation history of these systems, but...