2008ApJ...678L..85D

Query : 2008ApJ...678L..85D

2008ApJ...678L..85D - Astrophys. J., 678, L85-L88 (2008/May-2)

An arc of young stars in the halo of M82.

DAVIDGE T.J.

Abstract (from CDS):

The properties of the brightest resolved stars in an arc that was originally identified by Sun et al. and is located in the extraplanar regions of M82 are discussed. The stars form an elongated structure that is traced over a projected area of 3.0x0.8 kpc2. The integrated brightness is MV~-11, while the total stellar mass is between 3x105 and 2x106 M☉. If there is only foreground extinction then the youngest stars have a metallicity Z≥0.008 and an age log(tyr)∼7.75; thus, the youngest stars formed at roughly the same time as stars in tidal features that are associated with other M81 Group galaxies. If the arc disperses then it will deposit young, chemically enriched stars into the M82 halo.

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Journal keyword(s): Galaxies: Evolution - Galaxies: Halos - Galaxies: Individual: Messier Number: M82 - Galaxies: Starburst

Simbad objects: 8

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Number of rows : 8
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 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
2 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
3 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
4 NAME Arp Loop G 09 57 29.0 +69 16 20           ~ 71 1
5 MCG+12-10-012 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 327 4
6 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
7 NAME Garland G 10 03 43.1 +68 41 32           ~ 69 2
8 NAME Local Group GrG ~ ~           ~ 9325 0

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