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Proposal Identification No.:

A1904

Date Received:

2004-Jan-27 09:55:22

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Extragalactic 40 Hours

HI Observations of Dwarf Galaxy Candidates in the Leo I Group Region

The Leo I group is a nearby density enhancement characterized by a low velo city disp ersion but containing a lo cal density enhancement that supp orts the presence of bright E/SO galaxies. It thus presents an interesting environment in which to study differences among the low luminosity dwarf p opulations. We prop ose to conduct HI line observations of a set of dwarf galaxies b elieved to b e group memb ers identified in a wide area (120 square degree) survey of the area of sky containing Leo I. In addition to verifying their group memb ership, the observations will determine the HI content and rotation velo city and thus help to reveal further their relation to group substructures. In combination with future E-ALFA survey results, these observations will allow an understanding of the corresp ondence of optical and HI selection among the lowest mass ob jects in this particularly interesting volume of the lo cal universe.

Name Martha P. Haynes

Institution Cornell University

E-mail haynes@astro.cornell.edu

Phone 607/255-0610

Student no

Service Observing Request

Remot e Observing Request

X

None All of the observing run. Part of the observing run. Queue Observing X

No Maybe Yes

Instrument Setup
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
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Frequency Ranges Planned
1370-1430 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