2018A&A...616L..13L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST21:04:31

2018A&A...616L..13L - Astronomy and Astrophysics, volume 616, L13-13 (2018/8-1)

A new method to identify subclasses among AGB stars using Gaia and 2MASS photometry.

LEBZELTER T., MOWLAVI N., MARIGO P., PASTORELLI G., TRABUCCHI M., WOOD P.R. and LECOEUR-TAIBI I.

Abstract (from CDS):


Aims. We explore the wealth of high-quality photometric data provided by data release 2 (DR2) of the Gaia mission for long-period variables (LPVs) in the Large Magellanic Cloud (LMC). Our goal is to identify stars of various types and masses along the asymptotic giant branch.
Methods. For this endeavour, we developed a new multi-band approach combining Wesenheit functions WRP,BP–RP and WKs,J–Ks in the Gaia BP, RP, and 2MASS J, Ks spectral ranges, respectively, and use a new diagram, (WRP,BP–RP-WKs,J–Ks) versus Ks, to distinguish between different kinds of stars in our sample of LPVs. We used stellar population synthesis models to validate our approach.
Results. We demonstrate the ability of the new diagram to discriminate between O- and C-rich objects, and to identify low-mass, intermediate-mass, and massive O-rich red giants, as well as extreme C-rich stars. Stellar evolution and population synthesis models guide the interpretation of the results, highlighting the diagnostic power of the new tool to discriminate between stellar initial masses, chemical properties, and evolutionary stages.

Abstract Copyright: © ESO 2018

Journal keyword(s): stars: AGB and post-AGB - stars: evolution - stars: variables: general - Magellanic Clouds

Simbad objects: 4

goto Full paper

goto View the reference in ADS

Number of rows : 4

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9446 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
4 NAME Galactic Bulge reg ~ ~           ~ 3391 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018A&A...616L..13L and select 'bookmark this link' or equivalent in the popup menu


2020.07.11-21:04:32

© Université de Strasbourg/CNRS

    • Contact