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Submillimeter follow-up of wise-selected hyperluminous galaxies
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Benford, Dominic Rho, Jeonghee Tsai, Chao-Wei Griffith, Roger Sayers, Jack Assef, Roberto Eisenhardt, Peter R. M. Stern, Daniel Bussmann, Shane Lake, Sean Lonsdale, Carol Comerford, Julia M. Cutri, Roc Bridge, Carrie Blain, Andrew Petty, Sara Stanford, S. Adam Wu, Jingwen Evans II, Neal J. Jarrett Sr., Thomas |
| Copyright Year | 2013 |
| 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 (approximately 1000 all-sky) population of galaxies at high redshift (peaks at zeta = 2-3), which are faint or undetected by WISE at 3.4 and 4.6 micrometers, yet are clearly detected at 12 and 22 micrometers. The optical spectra of most of these galaxies show significant active galactic nucleus activity. We observed 14 high-redshift (zeta greater than 1.7) W1W2-dropout galaxies with SHARC-II at 350-850 micrometers, 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 micrometers, 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 60-120 K using a single-temperature model. Their infrared luminosities are well over 10(exp 13) solar 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 | 1080212 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20130013667 |
| Archival Resource Key | ark:/13960/t5r83bh36 |
| Language | English |
| Publisher Date | 2013-09-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Red Shift Light Visible Radiation Starburst Galaxies Spectral Energy Distribution Luminosity Infrared Spectra Stellar Luminosity Active Galaxies Active Galactic Nuclei Cosmic Dust Wide-field Infrared Survey Explorer Submillimeter Waves Infrared Radiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
