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Proposal Identification No.:

A2407

Date Received:

2008-Feb-28 15:41:09

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Short Astronomy Spectroscopy Extragalactic 1 Hours

A search for HI in Virgo cluster blue early-type dwarf galaxies

We propose to observe with the L-feed receiver of the Arecibo telescope 8 early-type dwarf galaxies in the Virgo cluster, selected after an analysis of the ALFALFA survey data cubes. They appear to be possible HI candidate sources with low S/N ( 5). Moreoever their optical counterparts are characterized by blue centers (g-i <0.5) suggesting the presence of a recent or ongoing star formation activity. Such observations are required to validate our tentative detections. An integration time of 6 minutes per ob ject will allow us to reach a rms of 1.1 mJy (at a resolution of 10 km s-1 ), roughly two times lower than ALFALFA. The requested observations are not part of the ALFALFA follow-up program.

Name Marco Grossi

Institution Osservatorio Astrofisico di Arcetri

E-mail grossi@arcetri.astro.it

Phone Student +390552752234 no

Remote Observing Request

Observer will travel to AO Remote Observing X In Absentia (instructions to operator)

Instrument Setup
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
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Frequency Ranges Planned
1395 - 1425 This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz..

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