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Extremely red stellar objects revealed by IPHAS
N. J. Wright, R. Greimel, M. J. Barlow +13
We present photometric analysis and follow-up spectroscopy for a population of extremely red stellar objects extracted from the point-source catalogue of the INT Photometric H-Alph…
AGB stars as tracers of metallicity and mean age across M33
M. -R. L. Cioni, M. Irwin, A. M. N. Ferguson +6
Wide-field JHKs near-infrared observations covering an area of 1.8x1.8 sq. deg. centred on M33 were obtained using WFCAM at UKIRT. These data show a large population of intermediat…
Metallicity and mean age across M33
M. -R. L. Cioni, M. Irwin, A. M. N. Ferguson +6
New wide-field near-infrared (NIR) imaging observations of M33 were obtained from UKIRT. These show a large population of intermediate-age stars considerably improving on previous…
Near-Infrared photometry of carbon stars in the Sagittarius dwarf irregular galaxy and DDO 210
M. Gullieuszik, M. Rejkuba, M. R. Cioni +2
We investigate the intermediate-age asymptotic giant branch stellar population of two Local Group dwarf irregular galaxies to characterize their carbon star population in near-infr…
The VMC survey and the SFH of some Local Group Galaxies
Maria-Rosa L. Cioni
The Ks-band magnitude distribution of carbon-rich and oxygen-rich asymptotic giant branch stars within Local Group galaxies like the Magellanic Clouds, NGC 6822, M33 and SagDIG is…
Probing clumpy pasts of galaxies from AGB stars
K. Bekki, M. -R. L. Cioni
Recent morphological studies of galaxies by the {\it Hubble Space Telescope (HST)} have revealed that actively star-forming galaxies at intermediate and high redshifts (…
Star Formation History across the Magellanic Clouds and other Local Group galaxies
M. -R. L. Cioni
The Ks magnitude distribution of asymptotic giant branch stars provides important constraints on the spatial variation of metallicity and mean-age of the stellar population of gala…
Spitzer spectroscopy of carbon stars in the Small Magellanic Cloud
Eric Lagadec, Albert A. Zijlstra, G. C. Sloan +12
We present Spitzer Space telescope spectroscopic observations of 14 carbon-rich AGB stars in the Small Magellanic Cloud. SiC dust is seen in most of the carbon-rich stars but it is…
A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloud
Albert A. Zijlstra, Mikako Matsuura, Peter R. Wood +13
We present a Spitzer Space Telescope spectroscopic survey of mass-losing carbon stars (and one oxygen-rich star) in the Large Magellanic Cloud. The spectra cover the wavelength ran…
AGB stars in the Magellanic Clouds. III. The rate of star formation across the SMC
M. -R. L. Cioni, L. Girardi, P. Marigo +1
This article compares the Ks magnitude distribution of Small Magellanic Cloud asymptotic giant branch stars obtained from the DENIS and 2MASS data with theoretical distributions. T…
AGB stars in the Magellanic Clouds. II. The rate of star formation across the LMC
M. -R. L. Cioni, L. Girardi, P. Marigo +1
This article compares the distribution of Ks magnitude of Large Magellanic Cloud (LMC) asymptotic giant branch (AGB) stars obtained from the DENIS and 2MASS data with theoretical d…
Pulsation properties of C stars in the Small Magellanic Cloud
G. Raimondo, M. -R. L. Cioni, M. Rejkuba +1
A sample of carbon-rich stars (C-stars) in the Small Magellanic Cloud (SMC) was selected from the combined 2MASS and DENIS catalogues on the basis of their colour. This sam…
An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch stars
Jacco Th. van Loon, Maria-Rosa L. Cioni, Albert A. Zijlstra +1
We present an empirical determination of the mass-loss rate as a function of stellar luminosity and effective temperature, for oxygen-rich dust-enshrouded Asymptotic Giant Branch s…
Near-IR observations of NGC 6822: AGB stars, distance, metallicity and structure
M. -R. L. Cioni, H. J. Habing
Observations in the IJKs wave bands covering the central 20'x20' of the Local Group galaxy NGC 6822 have been performed from the William Herschel Telescope in La Palma. They have a…
Abundance gradient in Local Group galaxies using Asymptotic Giant Branch stars
M. -R. L. Cioni
Simultaneous IJKs observations allow us to statistically select AGB stars, both M and C type, from RGB and younger or foreground stars in nearby galaxies. Regions of different meta…
AGB star in the Magellanic Clouds & in other members of the Local Group
Maria-Rosa L. Cioni
Results obtained in the Magellanic Clouds using the latest near-IR DENIS survey are briefly revised. This sets the base to a similar study of AGB stars in other galaxies of the Loc…
Long Period Variables detected by ISO in the SMC
M. -R. L. Cioni, J. A. D. L. Blommaert, M. A. T. Groenewegen +8
This article presents the study of the light-curves extracted from the MACHO database of a sample of stars observed by the ISO in the SMC. These stars belong to the ISO-Mini-Survey…
On the usefulness of finding charts Or the runaway carbon stars of the Blanco & McCarthy field 37
C. Loup, N. Delmotte, D. Egret +2
We have been recently faced with the problem of cross--identifying stars recorded in historical catalogues with those extracted from recent fully digitized surveys (such as DENIS a…
The Master Catalogue of stars towards the Magellanic Clouds
N. Delmotte, C. Loup, D. Egret +2
The Master Catalogue of stars towards the Magellanic Clouds (MC2) is a multi-wavelength reference catalogue. The current paper presents the first results of the MC2 project. We sta…
Three aspects of red giant studies in the Magellanic Clouds
M. -R. L. Cioni
There are three important aspects concerning the study of the red giant and in particular of the asymptotic giant branch (AGB) stars in the Magellanic Clouds. These are: the surfac…
Cross-matching DENIS and 2MASS Point Sources towards the Magellanic Clouds
N. Delmotte, D. Egret, C. Loup +1
The recent publications of the DENIS Catalogue towards the Magellanic Clouds (MCs) with more than 1.3 million sources identified in at least two of the three DENIS filters (I J K_s…
Variability and spectral classification of LMC giants: results from DENIS and EROS
M-R. L. Cioni, J-B. Marquette, C. Loup +4
We present the first cross-identifications of sources in the near-infrared DENIS survey and in the micro-lensing EROS survey in a field of about 0.5 square degrees around the optic…
Magellanic Cloud Structure from Near-IR Surveys I: The Viewing Angles of the LMC
Roeland P. van der Marel, Maria-Rosa L. Cioni
We present a detailed study of the viewing angles of the LMC disk plane. We find that our viewing direction differs considerably from the commonly accepted values, which has import…
The Tip of the Red Giant Branch and Distance of the Magellanic Clouds: results from the DENIS survey
Maria-Rosa. L. Cioni, Roeland P. van der Marel, Cecile Loup +1
We present a precise determination of the apparent magnitude of the tip of the red giant branch (TRGB) in the I (0.8 micron), J (1.25 micron), and K_S (2.15 micron) bands from the…