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: http://www.atnf.csiro.au/research/multibeam/HIPASS-BGC/
Дата изменения: Unknown Дата индексирования: Sun Apr 10 04:10:50 2016 Кодировка: Поисковые слова: orion nebula |
by B.S. Koribalski, L. Staveley-Smith, V.A. Kilborn, S.D. Ryder,
R.C. Kraan-Korteweg, E.V. Ryan-Weber, R.D. Ekers, H. Jerjen,
P.A. Henning, M.E. Putman, M.A. Zwaan, W.J.G. de Blok,
M.R. Calabretta, M.J. Disney, R.F. Minchin, R. Bhathal,
P.J. Boyce, M.J. Drinkwater, K.C. Freeman, B.K. Gibson,
A.J. Green, R.F. Haynes, S. Juraszek, M.J. Kesteven, P.M. Knezek,
S. Mader, M. Marquarding, M. Meyer, J.R. Mould, T. Oosterloo,
J. O'Brien, R.M. Price, E.M. Sadler, A. Schroeder, I.M. Stewart,
F. Stootman, M. Waugh, B.E. Warren, R.L. Webster, A.E. Wright 2004,
AJ 128, 16
- astro-ph/0404436
Abstract.
We present the HIPASS Bright Galaxy Catalog (BGC) which contains the 1000
HI-brightest galaxies in the southern sky as obtained from the HI Parkes
All-Sky Survey (HIPASS). The selection of the brightest sources is based on
their HI peak flux density (Speak > 116 mJy) as measured from the spatially
integrated HIPASS spectrum. The derived HI masses range from about 10^7 to
4 x 10^10 Msun. While the BGC (z < 0.03) is complete in Speak, only a subset
of about 500 sources can be considered complete in integrated HI flux density
(FHI > 25 Jy km/s).
The HIPASS BGC contains a total of 158 new redshifts. These belong to 91
new sources for which no optical or infrared counterparts have previously
been cataloged, an additional 51 galaxies for which no redshifts were
previously known, and 16 galaxies for which the cataloged optical velocities
disagree.
Of the 91 newly catalogued BGC sources, only four are definite HI clouds:
while three are likely Magellanic debris with velocities around 400 km/s, one
is a tidal cloud associated with the NGC 2442 galaxy group. The remaining 87
HIPASS provides a clear view of the local large-scale structure. The dominant
features in the sky distribution of the BGC are the Supergalactic Plane and
the Local Void. In addition, one can clearly see the Centaurus Wall which
connects via the Hydra and Antlia clusters to the Puppis filament. Some
previously hardly noticed galaxy groups stand out quite distinctively in
the HI sky distribution. Several new structures are seen for the
first time, not only behind the Milky Way.
Keywords: surveys - galaxies: distances and redshifts, fundamental parameters, kinematics and dynamics - intergalactic medium - radio emission lines
Any questions/comments, just contact me (Baerbel.Koribalski @ csiro.au).
