2MASS Extended Sources in the Zone of Avoidance

Details 2MASS Extended Sources in the Zone of Avoidance 2MASS Extended Sources in the Zone of Avoidance

2000-04-30

arxiv.org/abs/astro-ph/0005017v1

Astronomy and Astrophysics

Astrophysics

Astronomial Journal, in press. See http://spider.ipac.caltech.edu/staff/jarrett/papers/ZoA/

Scientific paper

10.1086/301426

The Two Micron All Sky Survey (2MASS) is now underway and will provide a complete census of galaxies as faint as 13.5 mag (3 mJy) at 2.2 microns for most of the sky, and ~12.1 mag (10 mJy) for regions veiled by the Milky Way. This census has already discovered nearby galaxies previously hidden behind our Galaxy, and will allow delineation of large-scale structures in the distribution of galaxies across the whole sky. Here we report the detection and discovery of new extended sources from this survey for fields incorporating the Galactic plane at longitudes between 40 and 70 deg. The area-normalized detection rate is ~1-2 galaxies per deg^2 brighter than 12.1 mag (10 mJy), roughly constant with Galactic latitude throughout the "Zone of Avoidance", of which 85-95% are newly discovered sources. In conjunction with the deep HI surveys, 2MASS will greatly increase the current census of galaxies hidden behind the Milky Way.

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