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Submillimeter follow-up of wise-selected hyperluminous galaxies (Document No: 20130012536)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Benford, Dominic Yan, Lin Rho, Jeonghee Tsai, Chao-Wei Griffith, Roger Eisenhardt, Peter R. Wright, Edward L. Sayers, Jack Assef, Roberto Stern, Daniel Bussmann, Shane Lake, Sean Lonsdale, Carol Comerford, Julia M. Cutri, Roc Bridge, Carrie Blain, Andrew Petty, Sara Weiner, Benjamin Stanford, S. Adam Wu, Jingwen Evans II, Neal J. Jarrett Sr., Thomas |
| Copyright Year | 2012 |
| Description | We have used the Caltech Submillimeter Observatory (CSO) to follow-up a sample of Wide-field Infrared Survey Explorer (WISE) selected, hyperluminous galaxies, the so-called W1W2-dropout galaxies. This is a rare (approx.1000 all-sky) population of galaxies at high redshift (peaks at z = 2-3), which are faint or undetected by WISE at 3.4 and 4.6 microns, yet are clearly detected at 12 and 22 microns. The optical spectra of most of these galaxies show significant active galactic nucleus activity. We observed 14 high-redshift (z > 1.7) W1W2-dropout galaxies with SHARC-II at 350-850 microns, with nine detections, and observed 18 with Bolocam at 1.1 mm, with five detections. Warm Spitzer follow-up of 25 targets at 3.6 and 4.5 microns, as well as optical spectra of 12 targets, are also presented in the paper. Combining WISE data with observations from warm Spitzer and CSO, we constructed their mid-IR to millimeter spectral energy distributions (SEDs). These SEDs have a consistent shape, showing significantly higher mid-IR to submillimeter ratios than other galaxy templates, suggesting a hotter dust temperature.We estimate their dust temperatures to be 60 C120 K using a single-temperature model. Their infrared luminosities are well over 10(exp 13) Stellar Luminosity. These SEDs are not well fitted with existing galaxy templates, suggesting they are a new population with very high luminosity and hot dust. They are likely among the most luminous galaxies in the universe.We argue that they are extreme cases of luminous, hot dust-obscured galaxies (DOGs), possibly representing a short evolutionary phase during galaxy merging and evolution. A better understanding of their long-wavelength properties needs ALMA as well as Herschel data. |
| File Size | 1080305 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20130012536 |
| Archival Resource Key | ark:/13960/t6h181383 |
| Language | English |
| Publisher Date | 2012-09-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Red Shift Active Galactic Nuclei Astronomical Observatories Cosmic Dust Starburst Galaxies Millimeter Waves Spectral Energy Distribution Spectra Stellar Luminosity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
