Issue |
A&A
Volume 391, Number 3, September I 2002
|
|
---|---|---|
Page(s) | 887 - 902 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20020884 | |
Published online | 09 August 2002 |
Parkes H I observations of galaxies behind the southern Milky Way*
I. The Hydra/Antlia region (
266
to 296
)
1
Depto. de Astronomía, Universidad de Guanajuato, Apartado Postal 144, Guanajuato, Gto 36000, Mexico
2
Institute for Astrophysics, University of New Mexico, 800 Yale Blvd., NE, Albuquerque, NM 87131, USA
3
Dept. of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
Corresponding author: R. C. Kraan-Korteweg, kraan@astro.ugto.mx
Received:
3
April
2002
Accepted:
11
June
2002
As part of our program to map the large-scale distribution
of galaxies behind the Milky Way, we used the Parkes 210 ft (64 m)
radio telescope for pointed observations of a sample of low
surface-brightness (due to heavy obscuration) spiral galaxies selected
from the deep optical Zone of Avoidance (ZOA) galaxy catalog in the
Hydra/Antlia region (Kraan-Korteweg [CITE]). Searching a simultaneous
velocity range of either 300 to 5500 km s-1 or 300 to 10 500 km s-1 to
an rms level of typically 2–4 m Jy resulted in detections in 61
of the 139 pointings, leading to a total of 66 detections (an
additional detection was made in a reference position, and two other
pointings revealed two and four independent signals
respectively). Except for 2 strong
emitters identified in the
shallow Zone of Avoidance
survey (Henning et al. [CITE]), all
detections are new. An analysis of the properties of the observed
and detected galaxies prove that pointed
observations of highly
obscured galaxies allow the tracing of a population of nearby,
intrinsically large and bright spiral galaxies that otherwise would
not be recovered. The new data identified a previously unrecognized
nearby group at
km s-1,
the continuation of the Hydra/Antlia filament on the opposite side of
the Galactic plane, and helped to delimit a distinct void in the ZOA
centered at 2000 km s-1.
Key words: catalogs / surveys / ISM: dust, extinction / galaxies: fundamental parameters / radio lines: galaxies / cosmology: large-scale structure of the Universe
© ESO, 2002
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.