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Date and Time of the Query: 2018-12-15 T02:13:54 PST
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For refcode 2005ApJ...622L.105H:
Retrieve 21 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2005ApJ...622L.105H Spectroscopic Redshifts to z > 2 for Optically Obscured Sources Discovered with the Spitzer Space Telescope J. R. Houck, B. T. Soifer, D. Weedman, S. J. U. Higdon, J. L. Higdon, T. Herter, M. J. I. Brown, A. Dey, B. T. Jannuzi, E. Le Floc'h, M. Rieke, L. Armus, V. Charmandaris, B. R. Brandl, and H. I. Teplitz Abstract. We have surveyed a field covering 9.0 deg^2^ within the NOAO Deep Wide-Field Survey region in Bootes with the Multiband Imaging Photometer on the Spitzer Space Telescope (SST) to a limiting 24 microns flux density of 0.3 mJy. Thirty-one sources from this survey with F_24{mu}m_>0.75 mJy that are optically very faint (R>~24.5 mag) have been observed with the low-resolution modules of the Infrared Spectrograph on SST (IRS). Redshifts derived primarily from strong silicate absorption features are reported here for 17 of these sources; 10 of these are optically invisible (R>~26 mag), with no counterpart in B_W_, R, or I. The observed redshifts for 16 sources are 1.7<z<2.8. These represent a newly discovered population of highly obscured sources at high redshift with extreme infrared-to-optical ratios. Using IRS spectra of local galaxies as templates, we find that a majority of the sources have mid-infrared spectral shapes most similar to ultraluminous infrared galaxies powered primarily by active galactic nuclei. Assuming that the same templates also apply at longer wavelengths, bolometric luminosities exceed 10^13^ L_sun_. Keywords: ISM: Dust, Extinction, Galaxies: Active, Galaxies: High-Redshift, Galaxies: Starburst, Infrared: Galaxies
Retrieve 21 NED objects in this reference.
Please click here for ADS abstract

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