2016MNRAS.461.3630D

Query : 2016MNRAS.461.3630D

2016MNRAS.461.3630D - Mon. Not. R. Astron. Soc., 461, 3630-3638 (2016/October-1)

Could Segue 1 be a destroyed star cluster? - a dynamical perspective.

DOMINGUEZ R., FELLHAUER M., BLANA M., FARIAS J.P., DABRINGHAUSEN J., CANDLISH G.N., SMITH R. and CHOQUE N.

Abstract (from CDS):

We attempt to find a progenitor for the ultrafaint object Segue 1 under the assumption that it formed as a dark matter free star cluster in the past. We look for orbits, using the elongation of Segue 1 on the sky as a tracer of its path. Those orbits are followed backwards in time to find the starting points of our N-body simulations. The successful orbit, with which we can reproduce Segue 1 has a proper motion of µα=-0.19 mas/yr and µδ=-1.9 mas/yr, placing Segue 1 near its apogalacticon today. Our best-fitting model has an initial mass of 6224 M☉ and an initial scalelength of 5.75 pc.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - galaxies: dwarf - galaxies: individual: (Segue 1) - galaxies: individual: (Segue 1)

Simbad objects: 4

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Number of rows : 4
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 Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
2 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
3 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 887 0
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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