| Issue |
A&A
Volume 379, Number 2, November IV 2001
|
|
|---|---|---|
| Page(s) | 407 - 411 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361:20011344 | |
| Published online | 15 November 2001 | |
Research Note: A new galaxy near the Local Group in Draco*
1
Special Astrophysical Observatory, Russian Academy of Sciences, N.Arkhyz, KChR, 369167, Russia,
2
Isaac Newton Institute, Chile, SAO Branch, Russia
3
Kitt Peak National Observatory, National Optical Astronomy Observatories, PO Box 26732, Tucson, AZ 85726, USA
4
Departamento de Fisica, Grupo de Astronomia, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile
5
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
6
UCO/Lick Observatory, University of California at Santa Cruz, Santa Cruz, CA 95064, USA
7
Department of Astronomy, University of Washington, Box 351580, Seattle, WA, USA
8
Astronomical observatory of Kiev University, 04053, Observatorna 3, Kiev, Ukraine
9
Department of Astronomy, University of Florida, Gainesville, FL 32611, USA
10
Department of Astronomy, University of Michigan, 830 Dennison Building, Ann Arbor, MI 48109, USA
Corresponding author: I. D. Karachentsev, ikar@luna.sao.ru
Received:
31
July
2001
Accepted:
12
September
2001
We present HST WFPC2 and ground-based images of the low surface brightness
dwarf Irr/Sph galaxy KKR 25 in Draco. Its colour-magnitude diagram shows
red giant branch stars with the tip at 
, and the presence of
some blue stars. The derived true distance modulus, 
,
corresponds to linear distances of KKR 25 from the Milky Way and from the
Local Group centroid of 1.86 and 1.79 Mpc, respectively. The absolute magnitude
of the galaxy, MV = -10.48, its linear diameter (0.54 Kpc) and central
surface brightness (
) are
typical of other dIrr/dSphs in the Local Group. Being situated just
beyond the radius of the zero-velocity surface of the Local Group, KKR 25
moves away from the LG centroid at a velocity of 
km s-1.
Key words: galaxies: dwarf / galaxies: distances and redshifts
Based on observations made with the NASA/ESA Hubble Space Telescope. The Space Telescope Science Institute is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. Based in part on observations obtained with the 6-m telescope operated by the Russian Academy of Sciences.
© ESO, 2001
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