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2MASS observations of Wolf-Rayet stars and galaxies

Published online by Cambridge University Press:  25 May 2016

Schuyler D. Van Dyk
Affiliation:
Infrared Processing and Analysis Center, Caltech, Pasadena, CA, USA
Thomas H. Jarrett
Affiliation:
Infrared Processing and Analysis Center, Caltech, Pasadena, CA, USA
Roc M. Cutri
Affiliation:
Infrared Processing and Analysis Center, Caltech, Pasadena, CA, USA
Michael F. Skrutskie
Affiliation:
University of Massachusetts, Amherst, MA, USA

Abstract

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The Two Micron All Sky Survey (2MASS) has observed a number of Wolf-Rayet stars and galaxies at J (1.25 μm), H (1.65 μm), and Ks (2.17 μm), as part of its systematic coverage of the entire sky with automated 1.3-m telescopes at Mt. Hopkins, AZ, and CTIO, Chile. The cameras observe the sky in the three channels simultaneously, using 256 x 256 HgCdTe-detector arrays. The survey samples the sky in 6° x 8.'3 tiles. The 2MASS Production Processing System transforms the raw binary survey data to final atlas images and source extractions with precise photometric calibration and astrometric positions. The survey's 10σ sensitivity is 15.8 mag at J, 15.1 at H, and 14.3 at Ks. In this poster we will present results from our analysis of several objects. We have observed WR stars both with and without associated ring nebulae. 2MASS imaging of the WR galaxies is far less affected by extinction, which can obscure much of the star formation activity. We will place these starburst dwarf galaxies in context with other galaxies, based on their near-IR colors and properties.

Type
Part 3. Interaction of Wolf-Rayet stars and other hot massive stars with their environment: colliding winds and ring nebulae
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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