Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey
We present the first measurement of the correlation between the map of the cosmic microwave background (CMB) lensing potential derived from the Planck nominal mission data and z≥1.5 galaxies detected by the Herschel-ATLAS (H-ATLAS) survey covering about 600 deg2, i.e., about 1.4% of the sky. We r...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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American Astronomical Society
2015
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| Online Access: | https://eprints.nottingham.ac.uk/42366/ |
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| author | Bianchini, F. Bielewicz, P. Lapi, A. Gonzalez-Nuevo, J. Baccigalupi, C. de Zotti, G. Danese, L. Bourne, N. Cooray, A. Dunne, L. Dye, S. Eales, S. Ivison, R. Maddox, S. Negrello, M. Scott, D. Smith, M.W.L. Valiante, E. |
| author_facet | Bianchini, F. Bielewicz, P. Lapi, A. Gonzalez-Nuevo, J. Baccigalupi, C. de Zotti, G. Danese, L. Bourne, N. Cooray, A. Dunne, L. Dye, S. Eales, S. Ivison, R. Maddox, S. Negrello, M. Scott, D. Smith, M.W.L. Valiante, E. |
| author_sort | Bianchini, F. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We present the first measurement of the correlation between the map of the cosmic microwave background (CMB) lensing potential derived from the Planck nominal mission data and z≥1.5 galaxies detected by the Herschel-ATLAS (H-ATLAS) survey covering about 600 deg2, i.e., about 1.4% of the sky. We reject the hypothesis that there is no correlation between CMB lensing and galaxy detection at a significance, checking the result by performing a number of null tests. The significance of the detection of the theoretically expected cross-correlation signal is found to be . The galaxy bias parameter, b, derived from a joint analysis of the cross-power spectrum and of the autopower spectrum of the galaxy density contrast is found to be , consistent with earlier estimates for H-ATLAS galaxies at similar redshifts. On the other hand, the amplitude of the cross-correlation is found to be a factor 1.62 ± 0.16 higher than expected from the standard model and also found by cross-correlation analyses with other tracers of the large-scale structure. The enhancement due to lensing magnification can account for only a fraction of the excess cross-correlation signal. We suggest that part of it may be due to an incomplete removal of the contamination of the cosmic infrared background, which includes the H-ATLAS sources we are cross-correlating with. In any case, the highly significant detection reported here using a catalog covering only 1.4% of the sky demonstrates the potential of CMB lensing correlations with submillimeter surveys. |
| first_indexed | 2025-11-14T19:48:32Z |
| format | Article |
| id | nottingham-42366 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:48:32Z |
| publishDate | 2015 |
| publisher | American Astronomical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-423662020-05-04T17:04:13Z https://eprints.nottingham.ac.uk/42366/ Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey Bianchini, F. Bielewicz, P. Lapi, A. Gonzalez-Nuevo, J. Baccigalupi, C. de Zotti, G. Danese, L. Bourne, N. Cooray, A. Dunne, L. Dye, S. Eales, S. Ivison, R. Maddox, S. Negrello, M. Scott, D. Smith, M.W.L. Valiante, E. We present the first measurement of the correlation between the map of the cosmic microwave background (CMB) lensing potential derived from the Planck nominal mission data and z≥1.5 galaxies detected by the Herschel-ATLAS (H-ATLAS) survey covering about 600 deg2, i.e., about 1.4% of the sky. We reject the hypothesis that there is no correlation between CMB lensing and galaxy detection at a significance, checking the result by performing a number of null tests. The significance of the detection of the theoretically expected cross-correlation signal is found to be . The galaxy bias parameter, b, derived from a joint analysis of the cross-power spectrum and of the autopower spectrum of the galaxy density contrast is found to be , consistent with earlier estimates for H-ATLAS galaxies at similar redshifts. On the other hand, the amplitude of the cross-correlation is found to be a factor 1.62 ± 0.16 higher than expected from the standard model and also found by cross-correlation analyses with other tracers of the large-scale structure. The enhancement due to lensing magnification can account for only a fraction of the excess cross-correlation signal. We suggest that part of it may be due to an incomplete removal of the contamination of the cosmic infrared background, which includes the H-ATLAS sources we are cross-correlating with. In any case, the highly significant detection reported here using a catalog covering only 1.4% of the sky demonstrates the potential of CMB lensing correlations with submillimeter surveys. American Astronomical Society 2015-03-24 Article PeerReviewed Bianchini, F., Bielewicz, P., Lapi, A., Gonzalez-Nuevo, J., Baccigalupi, C., de Zotti, G., Danese, L., Bourne, N., Cooray, A., Dunne, L., Dye, S., Eales, S., Ivison, R., Maddox, S., Negrello, M., Scott, D., Smith, M.W.L. and Valiante, E. (2015) Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey. Astrophysical Journal, 802 (1). p. 64. ISSN 1538-4357 cosmic background radiation; galaxies: high-redshift; gravitational lensing: weak; methods: data analysis; Cosmology: observations http://iopscience.iop.org/article/10.1088/0004-637X/802/1/64/meta doi:10.1088/0004-637X/802/1/64 doi:10.1088/0004-637X/802/1/64 |
| spellingShingle | cosmic background radiation; galaxies: high-redshift; gravitational lensing: weak; methods: data analysis; Cosmology: observations Bianchini, F. Bielewicz, P. Lapi, A. Gonzalez-Nuevo, J. Baccigalupi, C. de Zotti, G. Danese, L. Bourne, N. Cooray, A. Dunne, L. Dye, S. Eales, S. Ivison, R. Maddox, S. Negrello, M. Scott, D. Smith, M.W.L. Valiante, E. Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey |
| title | Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey |
| title_full | Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey |
| title_fullStr | Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey |
| title_full_unstemmed | Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey |
| title_short | Cross-correlation between the CMB lensing potential measured by Planck and high-z submillimeter galaxies detected by the Herschel-ATLAS survey |
| title_sort | cross-correlation between the cmb lensing potential measured by planck and high-z submillimeter galaxies detected by the herschel-atlas survey |
| topic | cosmic background radiation; galaxies: high-redshift; gravitational lensing: weak; methods: data analysis; Cosmology: observations |
| url | https://eprints.nottingham.ac.uk/42366/ https://eprints.nottingham.ac.uk/42366/ https://eprints.nottingham.ac.uk/42366/ |