2002ApJ...576L.125K

Query : 2002ApJ...576L.125K

2002ApJ...576L.125K - Astrophys. J., 576, L125-L129 (2002/September-2)

Exploring halo substructure with giant stars. III. First results from the grid giant star survey and discovery of a possible nearby Sagittarius tidal structure in Virgo.

KUNDU A., MAJEWSKI S.R., RHEE J., ROCHA-PINTO H.J., POLAK A.A., SLESNICK C.L., KUNKEL W.E., JOHNSTON K.V., PATTERSON R.J., GEISLER D., GIEREN W., SEGUEL J.C., SMITH V.V., PALMA C., ARENAS J., CRANE J.D. and HUMMELS C.B.

Abstract (from CDS):

We describe first results of a spectroscopic probe of selected fields from the Grid Giant Star Survey. Multifiber spectroscopy of several hundred stars in a strip of 11 fields along δ~-17°, in the range 12 hr≲α≲17 hr, reveals a group of eight giants that have kinematical characteristics differing from the main field population but that as a group maintain coherent, smoothly varying distances and radial velocities with position across the fields. Moreover, these stars have roughly the same abundance, according to their MgH+Mgb absorption line strengths. Photometric parallaxes place these stars in a semiloop structure, arcing in a contiguous distribution between 5.7 and 7.9 kpc from the Galactic center. The spatial, kinematical, and abundance coherence of these stars suggests that they are part of a diffuse stream of tidal debris, and one roughly consistent with a wrapped, leading tidal arm of the Sagittarius dwarf spheroidal galaxy.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Formation - Galaxy: Halo - Stars: General - Stars: Kinematics

Nomenclature: Table 1: GGSS JHHMMSS.ss+DDMMSS.s N=8.

CDS comments: Table 1, col. Name: the format JHHMM+DD.NNN will not be used in the final GGSS catalogue, but Authors will use the format JHHMMSS.ss+DDMMSS.s (email discussion with A. KUNDU).

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 TYC 6094-1450-1 HB* 12 02 16.8263821872 -17 00 09.028266804   12.423 11.459     ~ 16 0
2 2MASS J12501884-1702406 * 12 50 18.8494225656 -17 02 40.641237276           ~ 1 0
3 2MASS J13145150-1709204 * 13 14 51.4977517464 -17 09 20.392547328           ~ 1 0
4 2MASS J13364611-1659061 HB* 13 36 46.1066228088 -16 59 06.138306780           ~ 11 0
5 2MASS J14014898-1715253 * 14 01 48.9850509840 -17 15 25.387578648           ~ 1 0
6 2MASS J14252886-1708207 * 14 25 28.8677304432 -17 08 20.803179228           ~ 1 0
7 2MASS J14475933-1716170 * 14 47 59.3428228656 -17 16 17.111376732           ~ 1 0
8 2MASS J15104586-1653200 * 15 10 45.8716313136 -16 53 20.078094768           ~ 1 0
9 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
10 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
11 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2

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