Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/GehatagA2751tp.pdf Дата изменения: Thu Sep 20 00:03:54 2012 Дата индексирования: Fri Feb 28 21:50:51 2014 Кодировка: Поисковые слова: spiral galaxy

Proposal Identification No.:

A2751

Date Received:

2012-Sep-04 13:31:46

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

Testing Cosmology with Isolated Dwarf Galaxies

We propose HI observations of isolated low mass galaxies to better quantify the galaxy mass function. The galaxy mass function at low masses (<60 km/s) is related to the small-scale matter power spectrum, thus these observations will constrain our cosmological model, in particular the mass of the dark matter particle. While the mass function is well studied for Local Group dwarf galaxies, comparing these observations to theoretical predictions are difficult because of ram pressure and tidal stripping. By contrast, isolated dwarf galaxies are less affected by these processes. We have optically identified 73 isolated galaxies with expected low masses (between 40-60 km/s) which will nearly triple the current number of isolated galaxies with mass estimates. We request 30 hours using the L-band receiver to obtain HI observations of isolated dwarf galaxies, with the goal of robustly quantify the isolated galaxy mass function for low mass galaxies.

Name Marla Geha

Institution Yale University

E-mail marla.geha@yale.edu

Phone 203-432-5796

Student no

Remote Observing Request

X

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

Instrument Setup
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned

2