ALFA Ultra-Deep Survey
Team:Elias Brinks, Noah Brosch, Barbara Catinella,
Christopher Conselice, Jonathan Davies, Erwin de Blok, Virginia Kilborn, Suzanne Linder, Karen Masters, Martin
Meyer, Robert Minchin, Emmanuel Momjian, Karen O'Neil, Daniel Pisano, Jessica Rosenberg, Kristine
Spekkens, Lister Staveley-Smith, Wim van Driel, Martin Zwaan
Strategy: Very long integration time on small patches of sky
Team leader: Wolfram Freudling
AUDS Survey 2
STORRIE-LOMBARDI & WOLFE, 2000, ApJ 543,
552
PEI, FALL, & HAUSER 1999, ApJ, 522, 604
Main Scientific Motivation: Evolution of gas content at z < 0.15
Extrapola
tion fr
om Ly
-α
absorb
ers
Evolutio
n of s
tar-f
ormatio
n
rate
AUDS Survey 3
More Scientific Goals:
The Cosmic Web
Low column-density gas in the local Universe
Extragalactic OH Megamaser Emission
Extragalactic HI Absorption
AUDS Survey 4
Possible survey parameters
Need to be sensitive to MHI~109-10 M
200 km/sec linewidth 0.2mJy at z~0.16 rms~0.05 mJy/beam (260x deeper than HIPASS) 0.36 deg2 in 1000 hrs, or 70 hrs/beam Volume = 8000 Mpc3
160 galaxies in range 109-10 M
AUDS Survey 5
Precursor Proposal to test sensitivity limitations on small region: ___
σTint for long integrations?RFIBaselines, standing wavesEfficiency (time on “source”)
proposal: 70 hours of repeated drift
scans over an area with known gas
rich galaxies within 200Mhz
bandpass
Top Related