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Issue A&A
Volume 366, Number 2, February I 2001
Page(s) 428 - 438
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20000262



A&A 366, 428-438 (2001)
DOI: 10.1051/0004-6361:20000262

HI observations of nearby galaxies

III. More dwarf galaxies in the northern sky
I. D. Karachentsev1, V. E. Karachentseva2 and W. K. Huchtmeier3

1  Special Astrophysical Observatory, Russian Academy of Sciences, N. Arkhyz, KChR 369167, Russia
2  Astronomical observatory of Kiev University 04053, Observatorna, 3 Kiev, Ukraine
3  Max-Plank-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany

(Received 18 October 2000 / Accepted 13 November 2000)

Abstract
We carried out a systematic search for nearby dwarf galaxies in the northern sky based on POSS-II film copies. As a result we present a list of 101 nearby dwarf galaxy candidates mainly of low surface brightness which have angular diameters ${a}\ga 0\hbox{$.\mkern-4mu^\prime$ }5$. About two thirds of the objects are new discoveries. This sample is considered as a supplement to the 163 northern dwarf galaxy candidates (A& AS, 1998, 127, 409) which have been detected in the same declination range around the known Local Volume galaxies and to the 78 dwarf galaxy candidates (A& AS, 1999, 135, 221) in the Local Void region. All the galaxies were observed in HI with the 100-m Effelsberg radio telescope with a detection rate of 46% . The sample of detected galaxies has the following median parameters: radial velocity $V_{\rm LG} = +770$ km s-1, HI line width W50 = 46 km s-1, absolute blue magnitude $M_{\rm B} = -13.8$ mag, linear diameter ${\rm A}_{0} = 2.7$ kpc, hydrogen mass-to-luminosity ratio $M_{\rm HI}/L_{\rm B} = 1.2 M_{\odot}/L_{\odot}$, and the HI mass-to-total mass ratio $M_{{\ion{H}{i}}}/M_{\rm t}=0.28$.


Key words: galaxies: distances and redshifts -- galaxies: dwarf -- galaxies: fundamental parameters -- galaxies: general -- galaxies: irregular -- infrared: galaxies

SIMBAD Objects
Tables at the CDS



© ESO 2001

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