Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/PisanotagA1914tp.pdf Дата изменения: Fri Jul 2 16:04:14 2004 Дата индексирования: Sat Dec 22 22:33:01 2007 Кодировка: Поисковые слова: iceland

Proposal Identification No.:

A1914

Date Received:

2004-Feb-01 19:49:03

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Extragalactic 7.5 Hours

The HI properties of the faintest Blue Compact Dwarf, SA 68 6597

We prop ose to measure the HI content and linewidth of SA 68-6597 in order to b etter constrain its total mass and p otential for future star formation. SA 68-6597 is the lowest luminosity, MB -12.4 mag, blue compact dwarf or HI I galaxy known, and, based on optical emission linewidths, 28 km/s, amongst the lowest mass galaxies undergoing star formation. This linewidth may not reflect, however, the rotation of the gas but may trace outflows as well. The HI linewidth will trace the more extended gaseous comp onent providing a b etter constraint on the total mass of the galaxy. Measuring the HI mass will also tell us how much fuel for star formation is available in SA 68-6597. Combining our Keck and HST data with this Arecib o HI data will p ermit us to determine if SA 68-6597 is the precursor of a Carina-like dwarf spheroidal galaxy or another, more massive class of galaxy.

Name Daniel J Pisano

Institution Australia Telescope National Facility

E-mail dj.pisano@csiro.au

Phone 61-2-9372-4573

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
1


Frequency Ranges Planned
1382-1407 This proposal requires coordination with GPS L3 at 1381 MHz.

2