Astron. Astrophys. Suppl. Ser. 143, 421-456
An HI survey of highly flattened, edge-on, pure disk
L.D. Matthews 1 - W. van Driel2
Send offprint request: L.D. Matthews,
1 - National Radio Astronomy Observatory, 520 Edgemont Road,
Charlottesville, VA 22903, U.S.A.
Unité Scientifique Nançay, CNRS B704, Observatoire de Paris,
5 place Jules Janssen, 92195 Meudon, France
Received November 30, 1999; accepted February 2, 2000
We have undertaken an H I
21-cm line survey of 472 late-type, edge-on
galaxies using the Nançay Radio Telescope and the Green Bank
140-Foot Telescope. Our targets consisted of highly inclined spirals
with large disk axial ratios and
little or no bulge component-i.e., highly flattened, pure disk galaxies.
These objects were primarily selected from the Flat Galaxy Catalogue
Karachentsev et al. (1993).
Most were classified as Hubble
types Scd or later, with an emphasis on the largest angular size
and lowest optical surface brightness
objects in the FGC. Our detection rate was
%, underscoring that
relatively small, gas-rich, moderate-to-low surface brightness
pure disk spirals
are an extremely common constituent of the nearby universe.
Our data also suggest that the most highly flattened spirals are primarily isolated
systems. The majority
of our detected galaxies had no previously published redshifts or H I
Here we present H I
parameters for the 239 detected
sources and 45 marginal detections, together with
search limits for the undetected galaxies.
galaxies: general --
galaxies: ISM --
galaxies: fundamental parameters --
galaxies: spiral --
radio lines: galaxies
Copyright The European Southern Observatory (ESO)