Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/Schulte-LadbecktagA2237tp.pdf Дата изменения: Tue Aug 15 22:46:11 2006 Дата индексирования: Sun Dec 23 00:39:57 2007 Кодировка: Поисковые слова: apollo 13

Proposal Identification No.:

A2237

Date Received:

2006-May-30 16:22:11

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Short Astronomy Spectroscopy Extragalactic 1.2 Hours 30 minutes

The connection between galaxies and Damped Lyman Alpha systems

The processes by which gas cools and collects into dark matter halos forming stars and luminous galaxies, as well as the feedback through which these stars then affect their environment, are topics of great interest in galaxy evolution studies. Damped Lyman Alpha systems (DLAs) are QSO absorbers thought to contain most of the cool gas in the universe. Exceeding the star formation threshold of local galaxy disks, the luminous counterparts of DLAs should be directly observable. Yet, only one DLA galaxy, SBS 1543+593, has been both detected in the visible and with 21-cm emission. This nearby DLA is fairly extreme, with a large HI mass for its optical luminosity (MHI /LB = 4). We propose to measure the HI masses of two more low-z DLA candidates (one at Arecibo and one with the GBT) for which counterpart galaxies have been detected, to determine whether they are also extreme in their HI properties.

Name Regina E. Schulte-Ladbeck

Institution University of Pittsburgh

E-mail rsl@phyast.pitt.edu

Phone 412 624 9013

Student no

Remote Observing Request

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

Instrument Setup
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none 1


RFI Considerations Frequency Ranges Planned
1338 MHz This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

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