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Proposal Identication No.: A1489 Date Received: 2000-Oct-01 22:06:36
Technical Page
Proposal Type: Regular
General Category: Astronomy
Observation Category: Extragalactic
Total Time Requested: 120 Hours
Proposal Title: Dwarf Ellipticals in Rich Clusters: The First Galaxies or Evolved Spirals
ABSTRACT:
Cluster dwarf ellipticals, the most common type of galaxy in the local universe are excellent candidates for
remnants of either the rst generation of galaxies, or evolved spirals that fell into clusters near z = 1. By
investigating the HI content of dEs in the Virgo cluster it is possible to distinguish between these two ideas for
their origin. An old primordial population would have little gas, while a dierence in HI between the core dEs and
those on the outskirts of the cluster would indicate these dEs are evolved spirals. We propose to test these models
by obtaining HI masses for dEs in the outer parts of their orbits outside the core, and comparing these to HI
masses for the dEs in the core.
Name Institution E-mail Phone Student
Christopher J Conselice STScI consel@stsci.edu 410-338-4755 G
I might want to do remote observing.
Instrument Setup
L-narrow
Atmospheric Optical Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1