A search for IRAS galaxies behind the southern milky way

Toru Yamada, Tadafumi Takata, Thomas Djamaluddin, Akihiko Tomita, Kentaro Aoki, Aki Takeda, Mamoru Saito

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18 Citations (Scopus)

Abstract

We systematically searched for IRAS galaxies with 60 μm flux density larger than 0.6 Jy by using the UK Schmidt Infrared and IIIa-J Atlases in the Milky Way region (|b| < 15°) between l = 210° and 360°. We first selected about 4000 IRAS point sources by using our far-infrared criteria, which are optimized for the search of IRAS galaxies behind the Milky Way region, and then inspected visually the optical counterparts of them on the Schmidt Atlas film copies. We found 966 IRAS sources associated with galaxy-like objects. The list of the objects is presented here with the IRAS source name, Galactic coordinates, IRAS flux densities, field number and emulsion of the Atlas, type and size of galaxy (-like) image, redshift, multiplicity, and cross-identification. Of these, 423 galaxies are already cataloged in the Catalog of Galaxies and Quasars Observed in the IRAS Survey, and most of the remaining 543 galaxy candidates are newly identified in this search. Although the radial velocities are known for only 387 galaxies, of which 60 were newly measured by us so far, we inferred the contamination by Galactic objects to be small from the good correlation between the sky distributions of the newly identified galaxy candidates and the previously cataloged galaxies. In the regions where the Galactic molecular clouds dominate, almost all the sources were not identified as galaxies. The detected galaxies are clustered in the three regions around l = 240°, 280°, and 315°, where the projected number densities are higher than the whole-sky average of IRAS galaxies of the same flux limit.

Original languageEnglish
Pages (from-to)57-84
Number of pages28
JournalAstrophysical Journal, Supplement Series
Volume89
Issue number1
DOIs
Publication statusPublished - 1993 Jan 1

Keywords

  • Catalogs
  • Galaxy: structure
  • Infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Yamada, T., Takata, T., Djamaluddin, T., Tomita, A., Aoki, K., Takeda, A., & Saito, M. (1993). A search for IRAS galaxies behind the southern milky way. Astrophysical Journal, Supplement Series, 89(1), 57-84. https://doi.org/10.1086/191839