2010ApJ...712..516N

Query : 2010ApJ...712..516N

2010ApJ...712..516N - Astrophys. J., 712, 516-526 (2010/March-3)

Re-assembling the Sagittarius dwarf galaxy.

NIEDERSTE-OSTHOLT M., BELOKUROV V., EVANS N.W. and PENARRUBIA J.

Abstract (from CDS):

What was the mass of the progenitor of the Sagittarius (Sgr) dwarf galaxy? Here, we reassemble the stellar debris using Sloan Digital Sky Survey and Two Micron All-Sky Survey data to find the total luminosity and likely mass. We find that the luminosity is in the range (9.6-13.2)x107 L☉ or MV∼ -15.1 to -15.5, with 70% of the light residing in the debris streams. The progenitor is somewhat fainter than the present-day Small Magellanic Cloud, and comparable in brightness to the M31 dwarf spheroidals NGC 147 and NGC 185. Using cosmologically motivated models, we estimate that the mass of Sgr's dark matter halo prior to tidal disruption was ∼1010 M☉.

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Journal keyword(s): galaxies: dwarf - galaxies: individual: Sagittarius

Simbad objects: 11

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Number of rows : 11
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 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 Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
7 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
9 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
10 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
11 NAME Local Group GrG ~ ~           ~ 9325 0

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