The Virgo High-Resolution CO-line Survey with NMA
  
Yoshiaki  SOFUE,  Jin  KODA, Hiroyuki  NAKANISHI, Sachiko ONODERA,
Kotaro KOHNO, Akihiko TOMITA, Sachiko. K. OKUMURA
 
Abstract

We have obtained  the Virgo high-resolution CO survey (ViCS)
using the Nobeyama Millimeter-wave Array (NMA) in the AB, C and D
array configurations.
This survey was made during a course of a long-term project at 
Nobeyama from 1999 December through 2002 April.
The objects were selected from Virgo cluster members, while considering
the CO richness from the single-dish flux, mild inclination, and a lack of
strong tidal perturbations.
The central 1 arcmin regions (4.7 kpc) of 15 spiral galaxies
were observed with resolutions of 2 - 5" and 10--20 kms/s, and
sensitivities of 20 mJy/beam for a 10 km/s channel.
The objects lie at the same distance of the Virgo cluster (16.1 Mpc), which
is advantageous for comparisons among individual galaxies.
We describe the details of observations and data reduction, and present
an atlas of integrated CO intensity maps, velocity fields and
position--velocity diagrams along the major axes.
The molecular gas morphology in the Virgo galaxies shows a wealth of
variety, not specifically depending on the Hubble types.
Several galaxies show a strong concentration of gas in the central
few kpc region, where the CO morphology shows either a ``single-peak" or a
``twin-peaks".