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Proposal Identication No.: A1703 Date Received: 2002-May-23 10:26:52
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 78 Hours
Proposal Title: 21 cm of Virgo cluster dwarf spheroidal galaxies.
ABSTRACT:
We have developed a Fourier convolution technique optimized to detect and measure low luminosity and surface
brightness galaxies. We have applied it to ~ 14 sq deg area of deep CCD data (average sky noise 26 mag/ sq arcsec)
obtained as part of the INT WFC survey of the Virgo Cluster. We nd large numbers of dwarf galaxies consistent
with a steep faint end slope of the Luminosity Function and have identied a new population (144 galaxies in this
area) of relatively large dwarf LSB galaxies in the cluster. We now wish to carry out HI observations of our
detections in order to: a) conrm their cluster membership; b) place signicantly limits on the HI mass of the
possible non-detected objects; c) obtain mass-to-light ratios of the galaxies; d) determine the velocity distribution;
e) look for environmental eects on the gas content of the galaxies.
Name Institution E-mail Phone Student
Sabina Sabatini Cardi University s.sabatini@astro.cf.ac.uk +44 (0)2920
876992
G
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
L-wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz..
This proposal requires coordination with GPS L3 at 1381 MHz.
2