2021MNRAS.504..565J

Query : 2021MNRAS.504..565J

2021MNRAS.504..565J - Mon. Not. R. Astron. Soc., 504, 565-575 (2021/June-2)

Infrared variable stars in the compact elliptical galaxy M32.

JONES O.C., NALLY C., SHARP M.J., McDONALD I., BOYER M.L., MEIXNER M., KEMPER F., FERGUSON A.M.N., GOLDMAN S.R. and RICH R.M.

Abstract (from CDS):

Variable stars in the compact elliptical galaxy M32 are identified, using three epochs of photometry from the Spitzer Space Telescope at 3.6 and 4.5 µm, separated by 32 to 381 d. We present a high-fidelity catalogue of sources detected in multiple epochs at both 3.6 and 4.5 µm, which we analysed for stellar variability using a joint probability error-weighted flux difference. Of these, 83 stars are identified as candidate large-amplitude, long-period variables, with 28 considered high-confidence variables. The majority of the variable stars are classified as asymptotic giant branch star candidates using colour-magnitude diagrams. We find no evidence supporting a younger, infrared-bright stellar population in our M32 field.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

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

VizieR on-line data: <Available at CDS (J/MNRAS/504/565): table2.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 10

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Number of rows : 10
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 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
2 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
3 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
4 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
5 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
6 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
7 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
9 NAME NOAO Deep Wide Field reg 14 32 05.75 +34 16 47.5           ~ 430 0
10 NAME Local Group GrG ~ ~           ~ 9325 0

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