A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing
We measure the cross-power spectrum of the projected mass density as traced by the convergence of the cosmic microwave background lensing field from the South Pole Telescope (SPT) and a sample of Type 1 and 2 (unobscured and obscured) quasars at 〈z〉 ~ 1 selected with the Wide-field Infrared Survey E...
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American Astronomical Society
2013
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ftcaltechauth:oai:authors.library.caltech.edu:42227 2023-05-15T18:22:32+02:00 A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing Geach, J. E. Lueker, M. Padin, S. Vieira, J. D. 2013-10-20 application/pdf https://authors.library.caltech.edu/42227/ https://authors.library.caltech.edu/42227/1/2041-8205_776_2_L41.pdf https://authors.library.caltech.edu/42227/7/1307.1706v2.pdf https://resolver.caltech.edu/CaltechAUTHORS:20131104-135724437 en eng American Astronomical Society https://authors.library.caltech.edu/42227/1/2041-8205_776_2_L41.pdf https://authors.library.caltech.edu/42227/7/1307.1706v2.pdf Geach, J. E. and Lueker, M. and Padin, S. and Vieira, J. D. (2013) A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing. Astrophysical Journal Letters, 776 (2). Art. No. L41. ISSN 2041-8205. doi:10.1088/2041-8205/776/2/L41. https://resolver.caltech.edu/CaltechAUTHORS:20131104-135724437 <https://resolver.caltech.edu/CaltechAUTHORS:20131104-135724437> other Article PeerReviewed 2013 ftcaltechauth https://doi.org/10.1088/2041-8205/776/2/L41 2021-11-11T18:55:46Z We measure the cross-power spectrum of the projected mass density as traced by the convergence of the cosmic microwave background lensing field from the South Pole Telescope (SPT) and a sample of Type 1 and 2 (unobscured and obscured) quasars at 〈z〉 ~ 1 selected with the Wide-field Infrared Survey Explorer, over 2500 deg^2. The cross-power spectrum is detected at ≈7σ, and we measure a linear bias b = 1.61 ± 0.22, consistent with clustering analyses. Using an independent lensing map, derived from Planck observations, to measure the cross-spectrum, we find excellent agreement with the SPT analysis. The bias of the combined sample of Type 1 and 2 quasars determined in this work is similar to that previously determined for Type 1 quasars alone; we conclude that obscured and unobscured quasars trace the matter field in a similar way. This result has implications for our understanding of quasar unification and evolution schemes. Article in Journal/Newspaper South pole Caltech Authors (California Institute of Technology) South Pole The Astrophysical Journal 776 2 L41 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
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ftcaltechauth |
language |
English |
description |
We measure the cross-power spectrum of the projected mass density as traced by the convergence of the cosmic microwave background lensing field from the South Pole Telescope (SPT) and a sample of Type 1 and 2 (unobscured and obscured) quasars at 〈z〉 ~ 1 selected with the Wide-field Infrared Survey Explorer, over 2500 deg^2. The cross-power spectrum is detected at ≈7σ, and we measure a linear bias b = 1.61 ± 0.22, consistent with clustering analyses. Using an independent lensing map, derived from Planck observations, to measure the cross-spectrum, we find excellent agreement with the SPT analysis. The bias of the combined sample of Type 1 and 2 quasars determined in this work is similar to that previously determined for Type 1 quasars alone; we conclude that obscured and unobscured quasars trace the matter field in a similar way. This result has implications for our understanding of quasar unification and evolution schemes. |
format |
Article in Journal/Newspaper |
author |
Geach, J. E. Lueker, M. Padin, S. Vieira, J. D. |
spellingShingle |
Geach, J. E. Lueker, M. Padin, S. Vieira, J. D. A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing |
author_facet |
Geach, J. E. Lueker, M. Padin, S. Vieira, J. D. |
author_sort |
Geach, J. E. |
title |
A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing |
title_short |
A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing |
title_full |
A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing |
title_fullStr |
A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing |
title_full_unstemmed |
A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing |
title_sort |
direct measurement of the linear bias of mid-infrared-selected quasars at z ≈ 1 using cosmic microwave background lensing |
publisher |
American Astronomical Society |
publishDate |
2013 |
url |
https://authors.library.caltech.edu/42227/ https://authors.library.caltech.edu/42227/1/2041-8205_776_2_L41.pdf https://authors.library.caltech.edu/42227/7/1307.1706v2.pdf https://resolver.caltech.edu/CaltechAUTHORS:20131104-135724437 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://authors.library.caltech.edu/42227/1/2041-8205_776_2_L41.pdf https://authors.library.caltech.edu/42227/7/1307.1706v2.pdf Geach, J. E. and Lueker, M. and Padin, S. and Vieira, J. D. (2013) A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ≈ 1 Using Cosmic Microwave Background Lensing. Astrophysical Journal Letters, 776 (2). Art. No. L41. ISSN 2041-8205. doi:10.1088/2041-8205/776/2/L41. https://resolver.caltech.edu/CaltechAUTHORS:20131104-135724437 <https://resolver.caltech.edu/CaltechAUTHORS:20131104-135724437> |
op_rights |
other |
op_doi |
https://doi.org/10.1088/2041-8205/776/2/L41 |
container_title |
The Astrophysical Journal |
container_volume |
776 |
container_issue |
2 |
container_start_page |
L41 |
_version_ |
1766201941265743872 |