2015MNRAS.446.1584J

Query : 2015MNRAS.446.1584J

2015MNRAS.446.1584J - Mon. Not. R. Astron. Soc., 446, 1584-1596 (2015/January-2)

A Spitzer Space Telescope survey of extreme asymptotic giant branch stars in M32.

JONES O.C., McDONALD I., RICH R.M., KEMPER F., BOYER M.L., ZIJLSTRA A.A. and BENDO G.J.

Abstract (from CDS):

We investigate the population of cool, evolved stars in the Local Group dwarf elliptical galaxy M32, using Infrared Array Camera observations from the Spitzer Space Telescope. We construct deep mid-infrared colour-magnitude diagrams for the resolved stellar populations within 3.5 arcmin of M32's centre, and identify those stars that exhibit infrared excess. Our data are dominated by a population of luminous, dust-producing stars on the asymptotic giant branch (AGB) and extend to approximately 3 mag below the AGB tip. We detect for the first time a sizeable population of `extreme' AGB stars, highly enshrouded by circumstellar dust and likely completely obscured at optical wavelengths. The total dust-injection rate from the extreme AGB candidates is measured to be 7.5x10–7 M☉/yr, corresponding to a gas mass-loss rate of 1.5x10–4 M☉/yr. These extreme stars may be indicative of an extended star formation epoch between 0.2 and 5 Gyr ago.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: AGB and post-AGB - stars: late-type - stars: mass-loss - galaxies: individual: M32 - galaxies: stellar content - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/446/1584): table1.dat>

Nomenclature: Table 1: SSTM32 JHHMMSS.ss+DDMMSS.s N=1552.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 15

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Number of rows : 15
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
3 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
5 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
6 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
7 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
8 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
9 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
11 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
12 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
13 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
14 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
15 NAME Local Group GrG ~ ~           ~ 9325 0

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