Issue |
A&A
Volume 373, Number 1, July I 2001
|
|
---|---|---|
Page(s) | 12 - 23 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20010500 | |
Published online | 15 July 2001 |
Structure and stellar content of dwarf galaxies*
VI.
,
and
photometry of northern
field dwarf galaxies
1
Astronomisches Institut, Universität Basel, Venusstrasse 7, 4102 Binningen, Switzerland
2
Observatoire de Lyon, 64561 St. Genis-Laval Cedex, France
Corresponding author: F. D. Barazza, barazza@astro.unibas.ch
Received:
2
October
2000
Accepted:
14
March
2001
CCD photometry in the Cousins B, V and R bands of 19 northern field dwarf
galaxies is presented. For each galaxy, and for each colour,
we determined
total magnitude, effective radius and effective surface brightness,
and, by fitting an exponential to the surface brightness profile, central
surface brightness and exponential scale length. Surface brightness and colour
profiles are shown. One of the observed galaxies (UGC 2689) is probably a
background S0 galaxy and belongs to the cluster Abell 426.
All others, with one possible exception (Kar 49),
are typical late-type field
dwarf galaxies (mostly magellanic irregulars) lying
in the distance range 5-10 Mpc. The sample has a median
absolute magnitude MB = -14.9 and a median colour .
The present late-type dwarfs have higher surface brightness in
the mean than cluster late-type dwarfs, confirming a trend found
in our previous work. However, there is no evidence for a
photometric difference between field and group late-type dwarfs.
This paper is part of a long-term programme to study the environmental
differences in the photometric structure of dwarf galaxies.
Key words: galaxies: general / galaxies: fundamental parameters / galaxies: photometry / galaxies: irregular / galaxies: structure
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.