2006ApJ...643L.103Z

Query : 2006ApJ...643L.103Z

2006ApJ...643L.103Z - Astrophys. J., 643, L103-L106 (2006/June-1)

A new Milky way dwarf satellite in Canes Venatici.

ZUCKER D.B., BELOKUROV V., EVANS N.W., WILKINSON M.I., IRWIN M.J., SIVARANI T., HODGKIN S., BRAMICH D.M., IRWIN J.M., GILMORE G., WILLMAN B., VIDRIH S., FELLHAUER M., HEWETT P.C., BEERS T.C., BELL E.F., GREBEL E.K., SCHNEIDER D.P., NEWBERG H.J., WYSE R.F.G., ROCKOSI C.M., YANNY B., LUPTON R., SMITH J.A., BARENTINE J.C., BREWINGTON H., BRINKMANN J., HARVANEK M., KLEINMAN S.J., KRZESINSKI J., LONG D., NITTA A. and SNEDDEN S.A.

Abstract (from CDS):

In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the north Galactic cap using Sloan Digital Sky Survey Data Release 5 (SDSS DR5). The satellite's color-magnitude diagram shows a well-defined red giant branch as well as a horizontal branch. As judged from the tip of the red giant branch, it lies at a distance of ∼220 kpc. Based on the SDSS data, we estimate an absolute magnitude of MV~-7.9, a central surface brightness of µ0,V∼28 mag/arcsec2, and a half-light radius of ∼8'.5 (∼550 pc at the measured distance). The outer regions of Canes Venatici appear extended and distorted. The discovery of such a faint galaxy in proximity to the Milky Way strongly suggests that more such objects remain to be found.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Dwarf - galaxies: individual (Canes Venatici) - Galaxies: Local Group

CDS comments: Carbon star 1249+0146 = CGCS 6494

Simbad objects: 19

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Number of rows : 19
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 2MASS J00114529-0047101 C* 00 11 45.3074514072 -00 47 10.123823364   20.03 18.83     C 4 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
4 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
7 2MASS J07511636+3912014 C* 07 51 16.3703356176 +39 12 01.434635208   19.66 18.36     C 7 0
8 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
9 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
10 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
11 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
12 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
13 [TI98] 1249+0146 C* 12 51 49.8690435048 +01 30 01.810880892     15.15 16.04 14.27 C-N: 22 0
14 SDSS J132755.56+333521.7 C* 13 27 55.5682504056 +33 35 21.770904048           C 5 0
15 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
16 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
17 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
18 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
19 NAME Local Group GrG ~ ~           ~ 9325 0

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