Search and Redshift Survey for IRAS Galaxies behind the Milky Way and Structure of the Local Void

Astronomy and Astrophysics – Astronomy

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Surveys, Infrared: Galaxies, Catalogs, Cosmology: Large-Scale Structure Of Universe

Scientific paper

This is the third and final paper of our systematic visual search for IRAS galaxies behind the Milky Way at |b| <= 15 deg. This paper presents a catalog of 950 IRAS galaxies with 60 mu m flux densities larger than 0.6 Jy located between l = 0 deg and 150 deg, of which 293 are newly identified by this search. We made a redshift survey for the identified galaxies and obtained new redshift data of 171 galaxies. We also present newly measured redshifts of 27 IRAS galaxies between l = 150 deg and 225 deg at |b| <= 15 deg. In this paper we studied the structure of the Local void using IRAS galaxies and galaxies from the Third Reference Catalogue of Bright Galaxies in the region l = 30 deg--120 deg and b = -50 deg to +30 deg. The center of the Local void turned out to be located at l ~ 60 deg, b ~ -15 deg, and cz ~ 2500 km s-1, and the size is about 2500 km s-1 along the direction toward the center.

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