2019A&A...629A..91Y


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET10:13:04

2019A&A...629A..91Y - Astronomy and Astrophysics, volume 629A, 91-91 (2019/9-1)

Evolved massive stars at low-metallicity. I. A source catalog for the Small Magellanic Cloud.

YANG M., BONANOS A.Z., JIANG B.-W., GAO J., GAVRAS P., MARAVELIAS G., REN Y., WANG S., XUE M.-Y., TRAMPER F., SPETSIERI Z.T. and POULIASIS E.

Abstract (from CDS):

We present a clean, magnitude-limited (IRAC1 or WISE1 ≤ 15.0 mag) multiwavelength source catalog for the Small Magellanic Cloud (SMC) with 45 466 targets in total, with the purpose of building an anchor for future studies, especially for the massive star populations at low-metallicity. The catalog contains data in 50 different bands including 21 optical and 29 infrared bands, retrieved from SEIP, VMC, IRSF, AKARI, HERITAGE, Gaia, SkyMapper, NSC, Massey (2002ApJS..141...81M), and GALEX, ranging from the ultraviolet to the far-infrared. Additionally, radial velocities and spectral classifications were collected from the literature, and infrared and optical variability statistics were retrieved from WISE, SAGE-Var, VMC, IRSF, Gaia, NSC, and OGLE. The catalog was essentially built upon a 1'' crossmatching and a 3'' deblending between the Spitzer Enhanced Imaging Products (SEIP) source list and Gaia Data Release 2 (DR2) photometric data. Further constraints on the proper motions and parallaxes from Gaia DR2 allowed us to remove the foreground contamination. We estimate that about 99.5% of the targets in our catalog are most likely genuine members of the SMC. Using the evolutionary tracks and synthetic photometry from MESA Isochrones & Stellar Tracks and the theoretical J-KS color cuts, we identified 1405 red supergiant (RSG), 217 yellow supergiant, and 1369 blue supergiant candidates in the SMC in five different color-magnitude diagrams (CMDs), where attention should also be paid to the incompleteness of our sample. We ranked the candidates based on the intersection of different CMDs. A comparison between the models and observational data shows that the lower limit of initial mass for the RSG population may be as low as 7 or even 6M and that the RSG is well separated from the asymptotic giant branch (AGB) population even at faint magnitude, making RSGs a unique population connecting the evolved massive and intermediate stars, since stars with initial mass around 6 to 8M are thought to go through a second dredge-up to become AGB stars. We encourage the interested reader to further exploit the potential of our catalog.

Abstract Copyright: © ESO 2019

Journal keyword(s): infrared: stars - Magellanic Clouds - stars: late-type - stars: massive - stars: mass-loss - stars: variables: general

VizieR on-line data: <Available at CDS (J/A+A/629/A91): table3.dat tablebsg.dat tablersg.dat tableysg.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3575 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9559 1
3 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 945 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5762 1
5 NAME Magellanic Bridge HI 03 11 -77.5           ~ 339 1

    Equat.    Gal    SGal    Ecl

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2020.10.25-10:13:04

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