Mid-Infrared Selection of Brown Dwarfs and High-Redshift Quasars

Details Mid-Infrared Selection of Brown Dwarfs and High-Redshift Quasars Mid-Infrared Selection of Brown Dwarfs and High-Redshift Quasars

2006-08-28

arxiv.org/abs/astro-ph/0608603v1

Astrophys.J.663:677-685,2007

Astronomy and Astrophysics

Astrophysics

19 pages, 7 figures; submitted to the Astrophysical Journal

Scientific paper

10.1086/516833

We discuss color selection of rare objects in a wide-field, multiband survey spanning from the optical to the mid-infrared. Simple color criteria simultaneously identify and distinguish two of the most sought after astrophysical sources: the coolest brown dwarfs and the most distant quasars. We present spectroscopically-confirmed examples of each class identified in the IRAC Shallow Survey of the Bootes field of the NOAO Deep Wide-Field Survey. ISS J142950.9+333012 is a T4.5 brown dwarf at a distance of approximately 42 pc, and ISS J142738.5+331242 is a radio-loud quasar at redshift z=6.12. Our selection criteria identify a total of four candidates over 8 square degrees of the Bootes field. The other two candidates are both confirmed 5.5

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