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20 April 2024 |
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Galaxies Discovered Behind the Milky Way by the Dwingeloo Obscured Galaxies Survey | | P.A. Henning
; R.C. Kraan-Korteweg
; A.J. Rivers
; A.J. Loan
; O. Lahav
; W.B. Burton
; | | Date: |
1 Nov 1997 | | Subject: | astro-ph | | Affiliation: | 2,3), A.J. Rivers, A.J. Loan, O. Lahav, W.B. Burton ( Inst. for Astophysics, UNM, Observatoire de Paris-Meudon Dept. of Astronomy, Univ. Guanajuato, Inst. of Astronomy, Cambridge, Leiden Observatory | | Abstract: | Our Galaxy blocks a significant portion of the extragalactic sky from view, hampering studies of large-scale structure. This produces an incomplete knowledge of the distribution of galaxies, and, assuming galaxies trace mass, of the gravity field. Further, just one unrecognized, nearby massive galaxy could have large influence over the Milky Way’s motion with respect to the Cosmic Microwave Background. Diligent surveys in the optical and infrared wavebands can find galaxies through moderate Galactic gas and dust, but close to the Galactic Plane, only radio surveys are effective. The entire northern Zone of Avoidance is being searched at 21 cm for galaxies using the Dwingeloo 25-m telescope. A shallow search for nearby, and/or massive galaxies has been completed, yielding five objects. Two of these galaxies were previously unknown, and although they are not likely members of the Local Group, are part of the nearby Universe. A deeper search continues, which will produce a flux-limited catalog of hidden galaxies. This portion of the survey is one-third complete, and has detected about 40 objects to date. Based on present understanding of the HI mass function, the complete survey should uncover 50 - 100 galaxies. | | Source: | arXiv, astro-ph/9711001 | | Services: | Forum | Review | PDF | Favorites | |
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