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Proposal Identification No.:

A2848

Date Received:

2013-Sep-03 07:58:15

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: Regular Astronomy Spectroscopy Extragalactic 36 Hours 30 mins (5 on-source, 15 slew, 10 off/cal)

HI in dusty early-type galaxies: probing the minor merger process

We propose an HI study of 13 nearby, massive early-type galaxies with prominent dust lanes, systems that are considered to be remnants of recent minor mergers between spheroidearly-type galaxies and gas-rich dwarfs. Combined with our existing UV to far-infrared analysis of these ob jects using GALEX, SDSS, UKIDSS, WISE and Herschel-ATLAS surveys, as well as the recently obtained IRAM CO data, we will be able to estimate: (1) the gas masses involved in minor mergers; (2) the gas-to-dust ratios of the accreted satellites; (3) star formation efficiencies in minor mergers; and (4) the breakdown between atomic and molecular gas in such interactions. HI characterisation is an important step in our aim to produce a detailed empirical description of the role of gas in the minor merger process, which is a significant driver of cosmic star formation and AGN activity at late epochs, but is currently poorly understood.

Name James R Allison

Institution University of Sydney

E-mail jra@physics.usyd.edu.au

Phone +61 293518699

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 1


RFI Considerations Frequency Ranges Planned
1300-1400 1485-1685 This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST. 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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