2019MNRAS.482.4733D

Query : 2019MNRAS.482.4733D

2019MNRAS.482.4733D - Mon. Not. R. Astron. Soc., 482, 4733-4743 (2019/February-1)

Evolved stars in the Local Group galaxies - III. AGB and RSG stars in Sextans A.

DELL'AGLI F., DI CRISCIENZO M., GARCIA-HERNANDEZ D.A., VENTURA P., LIMONGI M., MARINI E. and JONES O.C.

Abstract (from CDS):

We study the evolved stellar population of the galaxy Sextans A. This galaxy is one of the lowest metallicity dwarfs in which variable asymptotic giant branch stars have been detected, suggesting that little metal enrichment took place during the past history. The analysis consists in the characterization of a sample of evolved stars, based on evolutionary tracks of asymptotic giant branch and red supergiant stars, which include the description of dust formation in their winds. Use of mid-infrared and near-infrared data allowed us to identify carbon-rich sources, stars undergoing hot bottom burning, and red supergiants. The dust production rate, estimated as 6 x 10–7M☉/yr, is dominated by ∼10 carbon stars, with a small contribution of higher mass M-stars, of the order of 4 x 10–8M☉/yr. The importance of this study to understand how dust production works in metal-poor environments is also evaluated.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Stars: abundances - Stars: AGB and post-AGB

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
2 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
4 [JMB2018] SextansA 462 * 10 10 53.0 -04 40 47           ~ 2 0
5 [JMB2018] SextansA 472 * 10 10 56.4 -04 40 08           ~ 2 0
6 [JMB2018] SextansA 456 C* 10 10 56.5 -04 41 34           ~ 2 0
7 [JMB2018] SextansA 305 * 10 10 57.9522856224 -04 39 47.441018268           ~ 2 0
8 [JMB2018] SextansA 17 * 10 10 59.2 -04 42 49           ~ 3 0
9 [JMB2018] SextansA 282 * 10 10 59.4 -04 40 12           ~ 2 0
10 SSTDUSTG J101059.55-044058.6 AB* 10 10 59.5347032760 -04 40 58.539788472           M 3 0
11 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
12 [JMB2018] SextansA 452 * 10 11 00.7 -04 42 12           ~ 2 0
13 SSTDUSTG J101100.79-044154.6 C* 10 11 00.795 -04 41 54.67           C 3 0
14 [JMB2018] SextansA 147 * 10 11 02.5432411656 -04 41 35.959041888           ~ 2 0
15 [JMB2018] SextansA 457 C* 10 11 03.0 -04 41 23           ~ 2 0
16 [JMB2018] SextansA 193 * 10 11 03.1 -04 41 08           ~ 2 0
17 [JMB2018] SextansA 336 * 10 11 04.8643897080 -04 43 05.132130276           ~ 2 0
18 NAME Local Group GrG ~ ~           ~ 9325 0

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