2014MNRAS.443L..84B

Query : 2014MNRAS.443L..84B

2014MNRAS.443L..84B - Mon. Not. R. Astron. Soc., 443, L84-L88 (2014/September-1)

Serendipitous discovery of a thin stellar stream near the Galactic bulge in the Pan-STARRS1 3π Survey.

BERNARD E.J., FERGUSON A.M.N., SCHLAFLY E.F., ABBAS M., BELL E.F., DEACON N.R., MARTIN N.F., RIX H.-W., SESAR B., SLATER C.T., PENARRUBIA J., WYSE R.F.G., BURGETT W.S., CHAMBERS K.C., DRAPER P.W., HODAPP K.W., KAISER N., KUDRITZKI R.-P., MAGNIER E.A., METCALFE N., MORGAN J.S., PRICE P.A., TONRY J.L., WAINSCOAT R.J. and WATERS C.

Abstract (from CDS):

We report the discovery of a thin stellar stream found in Pan-STARRS1 photometry near the Galactic bulge in the constellation of Ophiuchus. It appears as a coherent structure in the colour-selected stellar density maps produced to search for tidal debris around nearby globular clusters. The stream is exceptionally short and narrow; it is about 2 _.^○5 long and 6arcmin wide in projection. The colour-magnitude diagram of this object, which harbours a blue horizontal-branch, is consistent with an old and relatively metal-poor population ([Fe/H] ∼ -1.3) located 9.5±0.9 kpc away at (l, b) ∼ (5°, +32°), and 5.0±1.0 kpc from the Galactic centre. These properties argue for a globular cluster as progenitor. The finding of such a prominent, nearby stream suggests that many streams could await discovery in the more densely populated regions of our Galaxy.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): surveys - globular clusters: general - Galaxy: halo - Galaxy: structure

Nomenclature: NAME Ophiuchus Stream N=1.

Simbad objects: 9

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Number of rows : 9
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 Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 177 0
2 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 267 1
3 Cl Pal 5 GlC 15 16 05.30 -00 06 41.0   15.1       ~ 797 1
4 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
5 NAME Ophiuchus Stream St* 16 07 12.0 -06 55 30           ~ 38 0
6 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
7 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 143 0
8 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 307 1
9 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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