| 词条 | HIPASS |
| 释义 |
The HI Parkes All Sky Survey (HIPASS) is a large survey for neutral atomic hydrogen (HI).[1] Most of the data was taken between 1997 and 2002 using CSIRO's 64-m Parkes Telescope. HIPASS covered 71% of the sky and identified more than 5000 galaxies; the major galaxy catalogs are: the "HIPASS Bright Galaxy Catalog" (HIPASS BGC),[2] the southern HIPASS catalog (HICAT),[3] and the northern HIPASS catalog (NHICAT)[4] Discoveries include over 5000 galaxies (incl. several new galaxies), the Leading Arm of the Magellanic Stream and a few gas clouds devoid of stars. SurveyHIPASS covers a velocity range of -1,280 to 12,700 km/s. It was the first blind HI survey to cover the entire southern sky and the northern sky up to +25 degr. Technical overview, calibration and imaging (Barnes et al. 2001). Southern Sky observationsObservations of the southern sky started in February 1997, and were completed in March 2000, consisting of 23020 eight-degree scans of each of 9 minutes duration. HIPASS scanned the entire southern sky five times. The southern HIPASS galaxy catalog (HICAT)[3] contains 4315 HI sources. Northern Sky observationsNorthern HIPASS extended the survey into the northern sky. The entire Virgo Cluster region was observed in Northern HIPASS. NHICAT,[4] the catalogue of the northern extension of HIPASS contains 1002 HI sources. Multibeam ReceiverObservations for HIPASS were taken using the Parkes 21-cmcm Multibeam Receiver.[5] The instrument consists of a focal-plane array of 13 individual receivers arranged in a hexagonal pattern.[5] Built in a collaboration between numerous institutions, it was funded by the Australian Research Council (ARC) and the Australia Telescope National Facility (ATNF) to undertake the HIPASS and ZOA surveys. DiscoveriesLeading arm of Magellanic StreamHIPASS discovered the Leading Arm of the Magellanic Stream. This is an extension of the Magellanic Stream beyond the Magellanic clouds. The existence of the Leading Arm is predicted by models of a tidal interaction between the Magellanic Clouds and the Milky Way. HIPASS J0731-69HIPASS J0731-69 is a cloud of gas devoid of any stars.[6] It is associated with the asymmetric spiral galaxy NGC 2442.[6] It is likely that HIPASS J0731-69 was torn loose from NGC 2442 by a companion.[6] HIPASS J1712-64HIPASS J1712-64 is an isolated extragalactic cloud of neutral hydrogen with no associated stars.[7] The cloud is a binary system and is not dense enough to form stars.[7] HIPASS J1712-64 was probably ejected during an interaction between the Magellanic clouds and the Milky way. New galaxies in the Centaurus A/M83 GroupTen new galaxies were identified in the Centaurus A/M83 Group, bringing the total (at the time) to 31 galaxies.[8] See also
References1. ^{{cite web |url=http://www.atnf.csiro.au/research/multibeam/ |title=HI Parkes All Sky Survey (homepage)}} {{Radio surveys}}2. ^{{cite journal|bibcode=2004AJ....128...16K |title=HIPASS Bright Galaxy Catalog|arxiv=astro-ph/0404436|doi=10.1086/421744}} 3. ^1 {{cite journal |bibcode=2004MNRAS.350.1195M |title=Southern HIPASS catalog|arxiv=astro-ph/0406384|doi=10.1111/j.1365-2966.2004.07710.x}} 4. ^1 {{cite journal|bibcode=2006MNRAS.371.1855W |title=Northern HIPASS Catalog|arxiv=astro-ph/0607491|doi=10.1111/j.1365-2966.2006.10846.x}} 5. ^1 {{cite web |url=http://www.atnf.csiro.au/research/multibeam/.overview.html/ |title=Multibeam Receiver |deadurl=yes |archiveurl=https://web.archive.org/web/20000819042812/http://www.atnf.csiro.au/Research/multibeam/.overview.html |archivedate=2000-08-19 |df= }} 6. ^1 2 {{cite journal |author=Ryder, S.D. |display-authors=etal |title=HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group |date=July 2001 |bibcode=2001ApJ...555..232R|arxiv = astro-ph/0103099 |doi = 10.1086/321453 |journal=The Astrophysical Journal |volume=555 |pages=232 }} 7. ^1 {{cite journal |author=Kilborn V.A. |display-authors=etal |title =An Extragalactic H I Cloud with No Optical Counterpart? |date=September 2002 |bibcode=2000AJ....120.1342K |arxiv = astro-ph/0005267 |doi = 10.1086/301542 |journal=The Astronomical Journal |volume=120 |issue=3 |pages=1342 }} 8. ^{{cite journal |author=Banks D.G. |display-authors=etal |title=New Galaxies Discovered in the First Blind H I Survey of the Centaurus A Group |date=October 1999 |bibcode=1999ApJ...524..612B|arxiv = astro-ph/9906146 |doi = 10.1086/307854 |journal=The Astrophysical Journal |volume=524 |issue=2 |pages=612 }} 1 : Astronomical surveys |
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