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On the redshift distribution and physical properties of ACT-selected DSFGs
| Indexado |
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| DOI | 10.1093/MNRAS/STW2334 | ||||
| Año | 2017 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
We present multi-wavelength detections of nine candidate gravitationally lensed dusty starforming galaxies (DSFGs) selected at 218 GHz (1.4 mm) from the Atacama Cosmology Telescope (ACT) equatorial survey. Among the brightest ACT sources, these represent the subset of the total ACT sample lying in Herschel SPIRE fields, and all nine of the 218 GHz detections were found to have bright Herschel counterparts. By fitting their spectral energy distributions (SEDs) with a modified blackbody model with power-law temperature distribution, we find the sample has a median redshift of z = 4.1(-1.0)(+1.1) (68 per cent confidence interval), as expected for 218 GHz selection, and an apparent total infrared luminosity of log10(mu LIR/L-circle dot) = 13.86(-0.30)(+0.33), which suggests that they are either strongly lensed sources or unresolved collections of unlensed DSFGs. The effective apparent diameter of the sample is root mu d = 4.2(-1.0)(+1.7) kpc, further evidence of strong lensing or multiplicity, since the typical diameter of DSFGs is 1.0-2.5 kpc. We emphasize that the effective apparent diameter derives from SED modelling without the assumption of optically thin dust (as opposed to image morphology). We find that the sources have substantial optical depth (tau = 4.2(-1.9)(+3.7)) to dust around the peak in the modified blackbody spectrum (lambda(obs) <= 500 mu m), a result that is robust to model choice.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Su, T. | - |
Johns Hopkins Univ - Estados Unidos
Johns Hopkins University - Estados Unidos |
| 2 | Marriage, Tobias | Hombre |
Johns Hopkins Univ - Estados Unidos
Johns Hopkins University - Estados Unidos |
| 3 | Asboth, V. | - |
UNIV BRITISH COLUMBIA - Canadá
The University of British Columbia - Canadá |
| 4 | Baker, Andrew J. | Hombre |
RUTGERS STATE UNIV - Estados Unidos
Rutgers University–New Brunswick - Estados Unidos |
| 5 | Bond, J. R. | Hombre |
UNIV TORONTO - Canadá
Canadian Institute for Theoretical Astrophysics - Canadá L’Institut Canadien d’Astrophysique Théorique - Canadá |
| 6 | Crichton, Devin | Hombre |
Johns Hopkins Univ - Estados Unidos
Johns Hopkins University - Estados Unidos |
| 7 | Devlin, Mark | Hombre |
UNIV PENN - Estados Unidos
University of Pennsylvania - Estados Unidos |
| 8 | DUNNER-PLANELLA, ROLANDO | Hombre |
Pontificia Universidad Católica de Chile - Chile
Centro de Excelencia en Astrofísica y Tecnologías Afines - Chile |
| 9 | Rigopoulou, Dimitra | Mujer |
Virginia Tech - Estados Unidos
Virginia Polytechnic Institute and State University - Estados Unidos |
| 10 | Frayer, D. T. | Hombre |
Natl Radio Astron Observ - Estados Unidos
NRAO, Green Bank - Estados Unidos National Radio Astronomy Observatory (NRAO) - Estados Unidos |
| 11 | Gralla, Megan | Mujer |
Johns Hopkins Univ - Estados Unidos
Harvard Smithsonian Ctr Astrophys - Estados Unidos UNIV ARIZONA - Estados Unidos Johns Hopkins University - Estados Unidos Harvard-Smithsonian Center for Astrophysics - Estados Unidos The University of Arizona - Estados Unidos |
| 12 | Hall, Kirsten R. | Mujer |
Johns Hopkins Univ - Estados Unidos
Johns Hopkins University - Estados Unidos |
| 13 | Halpern, Mark | Hombre |
UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos |
| 14 | Harris, Andrew I. | Hombre |
UNIV MARYLAND - Estados Unidos
University of Maryland - Estados Unidos University of Maryland, College Park - Estados Unidos |
| 15 | Hilton, Gene C. | Hombre |
Univ KwaZulu Natal - República de Sudáfrica
University of KwaZulu-Natal - República de Sudáfrica |
| 16 | Hincks, A. D. | Hombre |
UNIV BRITISH COLUMBIA - Canadá
Univ Roma La Sapienza - Italia The University of British Columbia - Canadá Università degli Studi di Roma La Sapienza - Italia Sapienza Università di Roma - Italia |
| 17 | Hughes, John P. | Hombre |
RUTGERS STATE UNIV - Estados Unidos
Rutgers University–New Brunswick - Estados Unidos |
| 18 | Cozzuol, Mario A. | Hombre |
CORNELL UNIV - Estados Unidos
Cornell University - Estados Unidos Cornell University College of Engineering - Estados Unidos |
| 19 | Page, Lyman | Hombre |
Princeton Univ - Estados Unidos
Princeton University - Estados Unidos |
| 20 | Partridge, Bruce | Hombre |
Haverford Coll - Estados Unidos
Haverford College - Estados Unidos |
| 21 | Rivera, J. | Hombre |
RUTGERS STATE UNIV - Estados Unidos
Rutgers University–New Brunswick - Estados Unidos |
| 22 | Scott, Douglas | Hombre |
UNIV BRITISH COLUMBIA - Canadá
The University of British Columbia - Canadá |
| 23 | Sievers, Jonathan | Hombre |
Univ KwaZulu Natal - República de Sudáfrica
University of KwaZulu-Natal - República de Sudáfrica |
| 24 | Thornton, Robert J. | Hombre |
West Chester Univ - Estados Unidos
West Chester University - Estados Unidos |
| 25 | Viero, Marco P. | Hombre |
Universidad de Stanford - Estados Unidos
Kavli Institute for Particle Astrophysics and Cosmology - Estados Unidos Stanford University - Estados Unidos |
| 26 | Wang, L. | - |
SRON Netherlands Inst Space Res - Países Bajos
|
| 27 | Wollack, Edward J. | Hombre |
NASA - Estados Unidos
NASA Goddard Space Flight Center - Estados Unidos |
| 28 | Zemcov, Michael | Hombre |
Rochester Inst Technol - Estados Unidos
Jet Prop Lab - Estados Unidos Rochester Institute of Technology - Estados Unidos Jet Propulsion Laboratory - Estados Unidos |
| Fuente |
|---|
| National Science Foundation |
| Comisión Nacional de Investigación Científica y Tecnológica |
| Comisión Nacional de Investigación Científica y Tecnológica de Chile (CONICYT) |
| NSF |
| U.S. Department of Energy |
| U.S. National Science Foundation |
| National Aeronautics and Space Administration |
| Max Planck Society |
| Government of Ontario |
| University of Toronto |
| Alfred P. Sloan Foundation |
| U.S. Department of Energy Office of Science |
| Princeton University |
| Office of Science |
| Higher Education Funding Council for England |
| University of Pennsylvania |
| Compute Canada |
| state of Illinois |
| state of Maryland |
| state of California |
| Moore Foundation |
| Comisi?n Nacional de Investigaci?n Cient?fica y Tecnol?gica de Chile |
| Canada Foundation for Innovation |
| Japanese Monbukagakusho |
| Canada Foundation for Innovation (CFI) |
| CARMA partner universities |
| CFI under Compute Canada |
| Ontario Research Fund-Research Excellence |
| Ontario Research Fund - Research Excellence |
| NSF under a cooperative agreement |
| Associates of Caltech |
| Norris Foundation |
| states of California, Illinois, and Maryland |
| Directorate for Mathematical and Physical Sciences |
| Caltech Associates |
| Moore and Norris Foundations |
| Planck Society |
| Parque Astronomico Atacama |
| Agradecimiento |
|---|
| We thank our LMT collaborators for permission to make use of the spectroscopic redshift for ACT-S J0107+0001 in advance of publication. We thank Zhen-Yi Cai for providing model source distributions. AJB acknowledges support from the National Science Foundation though grant AST-0955810. ACT was supported by the U.S. National Science Foundation through awards AST-0408698 and AST-0965625 for the ACT project, as well as awards PHY-0855887 and PHY-1214379. ACT funding was also provided by Princeton University, the University of Pennsylvania, and a Canada Foundation for Innovation (CFI) award to UBC. ACT operates in the Parque Astronomico Atacama in northern Chile under the auspices of the Comision Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT). Computations were performed on the GPC supercomputer at the SciNet HPC Consortium. SciNet is funded by the CFI under the auspices of Compute Canada, the Government of Ontario, the Ontario Research Fund - Research Excellence; and the University of Toronto. Support for CARMA construction was derived from the Moore and Norris Foundations, the Associates of Caltech, the states of California, Illinois, and Maryland, and the NSF. CARMA development and operations were supported by the NSF under a cooperative agreement, and by the CARMA partner universities. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. We have used optical imaging from SDSS. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. Part of our NIR imaging is based on observations obtained as part of the VHS, ESO Progam, 179.A-2010 (PI: McMahon). We also have used data based on observations obtained with the Apache Point Observatory 3.5-metre telescope, which is owned and operated by the Astrophysical Research Consortium. This publication makes use of data products from the WISE, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Some of the observations reported in this paper were obtained with the Southern African Large Telescope (SALT). Finally, we acknowledge the MNRAS reviewer and editor for comments that improved the paper. |
| We thank our LMT collaborators for permission to make use of the spectroscopic redshift for ACT-S J0107+0001 in advance of publication.We thank Zhen-Yi Cai for providing model source distributions. AJB acknowledges support from the National Science Foundation though grant AST-0955810. ACT was supported by the U.S. National Science Foundation through awards AST-0408698 and AST-0965625 for the ACT project, as well as awards PHY-0855887 and PHY-1214379. ACT funding was also provided by Princeton University, the University of Pennsylvania, and a Canada Foundation for Innovation (CFI) award toUBC.ACT operates in the Parque Astronómico Atacama in northern Chile under the auspices of the Comisión Nacional de Investigación Científica y Tecnológica de Chile (CONICYT). Computations were performed on the GPC supercomputer at the SciNet HPC Consortium. SciNet is funded by the CFI under the auspices of Compute Canada, the Government of Ontario, the Ontario Research Fund-Research Excellence; and the University of Toronto. Support for CARMA construction was derived from the Moore and Norris Foundations, the Associates of Caltech, the states of California, Illinois, and Maryland, and the NSF. CARMA development and operations were supported by the NSF under a cooperative agreement, and by the CARMA partner universities. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. We have used optical imaging from SDSS. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, theMax Planck Society, and theHigher Education Funding Council for England. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. Part of our NIR imaging is based on observations obtained as part of the VHS, ESO Progam, 179.A-2010 (PI: McMahon). We also have used data based on observations obtainedwith theApache Point Observatory 3.5-metre telescope, which is owned and operated by the Astrophysical Research Consortium. This publication makes use of data products from the WISE, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Some of the observations reported in this paper were obtained with the Southern African Large Telescope (SALT). Finally, we acknowledge the MNRAS reviewer and editor for comments that improved the paper |
