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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Arecibo Galaxy Environment Survey: Precursor observations of the NGC 628 group
Monthly Notices of the Royal Astronomical Society, Volume 371, No. 4, Year 2006
Notification
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Description
The Arecibo Galaxy Environment Survey (AGES) is one of several H I surveys utilizing the new Arecibo L-band Feed Array (ALFA) fitted to the 305-m radio telescope at Arecibo.α The survey is specifically designed to investigate various galactic environments to higher sensitivity, higher velocity resolution and higher spatial resolution than previous fully sampled, 21-cm multibeam surveys. The emphasis is on making detailed observations of nearby objects although the large system bandwidth (100MHz) will allow us to quantify the Hi properties over a large instantaneous velocity range. In this paper, we describe the survey and its goals and present the results from the precursor observations of a 5 × 1-deg2 region containing the nearby (∼ 10 Mpc) NGC 628 group. We have detected all the group galaxies in the region including the low-mass (MHI ∼107 M⊙) dwarf, dw0137+1541. The fluxes and velocities for these galaxies compare well with previously published data. There is no intragroup neutral gas detected down to a limiting column density of 2 × 1018cm-2. In addition to the group galaxies we have detected 22 galaxies beyond the NGC 628 group, nine of which are previously uncatalogued. We present the H I data for these objects and also SuperCOSMOS images for possible optical galaxies that might be associated with the Hi signal. We have used V/Vmax analysis to model how many galaxies beyond 1000km s-1 should be detected and compare this with our results. The predicted number of detectable galaxies varies depending on the H I mass function (HIMF) used in the analysis. Unfortunately the precursor survey area is too small to determine whether this is saying anything fundamental about the HIMF or simply highlighting the effect of low number statistics. This is just one of many questions that will be addressed by the complete AGES survey. © 2006 RAS.
Authors & Co-Authors
Auld, Robbie R.
United Kingdom, Cardiff
Cardiff University
Minchin, Robert F.
Unknown Affiliation
Davies, Jonathan I.
United Kingdom, Cardiff
Cardiff University
Catinella, Barbara
Unknown Affiliation
van Driel, Willem
France, Paris
L'observatoire de Paris
Henning, Patricia A.
United States, Albuquerque
The University of new Mexico
Linder, Suzanne M.
Germany, Hamburg
Universität Hamburg
Momjian, Emmanuel
Unknown Affiliation
Muller, Erik
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
O'Neil, Karen L.
United States, Green Bank
Nrao, Green Bank
Sabatini, Sabina
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Schneider, Stephen E.
United States, Amherst
University of Massachusetts Amherst
Cortese, Luca
United Kingdom, Cardiff
Cardiff University
Hoffman, G. Lyle
United States, Easton
Lafayette College
Putman, Mary E.
United States, Ann Arbor
University of Michigan, Ann Arbor
Rosenberg, Jessica L.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Baes, Maarten
Belgium, Ghent
Universiteit Gent
de Blök, Willem J.G.
Australia, Canberra
The Australian National University
Boselli, Alessandro
France, Marseille
Laboratoire D'astrophysique de Marseille
Brinks, Elias
United Kingdom, Hatfield
University of Hertfordshire
Brosch, Noah
Israel, Tel Aviv-yafo
Tel Aviv University
Irwin, Judith A.
Canada, Kingston
Queen’s University
Karachentsev, Igor D.
Russian Federation, Moscow
Russian Academy of Sciences
Kilborn, Virginia A.
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
Australia, Hawthorn
Swinburne University of Technology
Koribalski, Baerbel S.
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
Spekkens, Kristine
United States, New Brunswick
Rutgers University–new Brunswick
United States, Charlottesville
National Radio Astronomy Observatory
Statistics
Citations: 64
Authors: 26
Affiliations: 22
Identifiers
Doi:
10.1111/j.1365-2966.2006.10761.x
ISSN:
00358711
Study Design
Cross Sectional Study
Study Approach
Quantitative