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Proposal Identification No.:

A2853

Date Received:

2013-Sep-02 13:26:35

Technical Page
This proposal has not been submitted before. Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT:
We propose targeted L-band wide observations to measure HI gas content of group galaxies known to be star forming from optical data but which were not detected by the ALFALFA survey. This work is part of a detailed multiwavelength study of a set of nearby groups within 120 Mpc spanning a range of X-ray luminosity, velocity dispersion, and richness. We aim to measure the gas fraction and star formation efficiency of all star forming group members to determine the threshold of gas depletion, star formation quenching, and morphological transformation within intermediate density environments. The proposed LBW observations will provide the critically important gas fractions of star-forming low mass and environmentally gas-depleted group galaxies whose HI fluxes fall below ALFALFA's sensitivity. The observations will be conducted by members of the Undergraduate ALFALFA Team mostly onsite.

Regular Astronomy Spectroscopy 122 Hours 2

L-Band Wide Observations of Star-Forming Galaxies in X-ray Selected Groups: The Quenching of Star Formation in the Group Environment

Name Rebecca A Koopmann

Institution Union College

E-mail koopmanr@union.edu

Phone 518-388-6786

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:

1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned
1375-1430

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