THE ALFA ZOA DEEP SURVEY: FIRST RESULTS

Journal Article · Wed Jul 01 04:00:00 EDT 2015 · The Astronomical Journal (Online)

DOI:https://doi.org/10.1088/0004-6256/150/1/28· OSTI ID:22862869

McIntyre, T. P.; Henning, P. A. ^[1]; Minchin, R. F. ^[2]; Momjian, E. ^[3]

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1. Department of Physics and Astronomy, University of New Mexico, 1919 Lomas Blvd. NE, Albuquerque, NM 87131 (United States)
2. Arecibo Observatory, HC03 Box 53995, Arecibo, PR 00612 (United States)
3. NRAO, Domenici Science Operations Center, P.O. Box O, 1003 Lopezville Rd., Socorro, NM 87801 (United States)

The Arecibo L-band Feed Array Zone of Avoidance (ALFA ZOA) Deep Survey is the deepest and most sensitive blind H i survey undertaken in the ZOA. ALFA ZOA Deep will cover about 300 square degrees of sky behind the Galactic Plane in both the inner (30{sup ∘}⩽l⩽75{sup ∘};b⩽|2{sup ∘}|) and outer (175{sup ∘}⩽l⩽207{sup ∘};−2{sup ∘}⩽b⩽+1{sup ∘}) Galaxy, using the Arecibo Radio Telescope. First results from the survey have found 61 galaxies within a 15 square degree area centered on l=192{sup ∘} and b = −2°. The survey reached its expected sensitivity of rms = 1 mJy at 9 km s{sup −1} channel resolution, and is shown to be complete above integrated flux, F{sub Hi} = 0.5 Jy km s{sup −1}. The positional accuracy of the survey is 28″ and detections are found out to a recessional velocity of nearly 19,000 km s{sup −1}. The survey confirms the extent of the Orion and Abell 539 clusters behind the plane of the Milky Way and discovers expansive voids, at 10,000 and 18,000 km s{sup −1}. Twenty-six detections (43%) have a counterpart in the literature, but only two of these have known redshifts. Counterparts are 20% less common beyond v{sub hel} = 10,000 km s{sup −1} and 33% less common at extinctions higher than A{sub B} = 3.5 mag. The ALFA ZOA Deep survey is able to probe large scale structure beyond redshifts that even the most modern wide-angle surveys have been able to detect in the ZOA at any wavelength.

• OSTI ID: 22862869
• Journal Information: The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 1 Vol. 150; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
DATA ANALYSIS
DETECTION
MILKY WAY
RADIO TELESCOPES
RED SHIFT
SENSITIVITY
UNIVERSE
WAVELENGTHS