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Title: The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies

Abstract

We present a 5.4$$\sigma$$ detection of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and $$\it{Planck}$$ CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained using three ACT CMB maps: co-added 150 GHz and 98 GHz maps, combining observations from 2008-2018 (ACT DR5), which overlap with SDSS DR15 over 3,700 sq. deg., and a component-separated map using night-time only observations from 2014-2015 (ACT DR4), overlapping with SDSS DR15 over 2,089 sq. deg. Comparisons of the results from these three maps provide consistency checks in relation to potential frequency-dependent foreground contamination. A total of 343,647 galaxies are used as tracers to identify and locate galaxy groups and clusters from which the kSZ signal is extracted using aperture photometry. We consider the impact of various aperture photometry assumptions and covariance estimation methods on the signal extraction. Theoretical predictions of the pairwise velocities are used to obtain best-fit, mass-averaged, optical depth estimates for each of five luminosity-selected tracer samples. A comparison of the kSZ-derived optical depth measurements obtained here to those derived from the thermal SZ effect for the same sample is presented in a companion paper.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
The ACT Collaboration
OSTI Identifier:
1818478
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 104; Journal Issue: 4; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Calafut, V., Gallardo, P.  A., Vavagiakis, E.  M., Amodeo, S., Aiola, S., Austermann, J.  E., Battaglia, N., Battistelli, E.  S., Beall, J.  A., Bean, R., Bond, J.  R., Calabrese, E., Choi, S.  K., Cothard, N.  F., Devlin, M.  J., Duell, C.  J., Duff, S.  M., Duivenvoorden, A.  J., Dunkley, J., Dunner, R., Ferraro, S., Guan, Y., Hill, J.  C., Hilton, G.  C., Hilton, M., Hložek, R., Huber, Z.  B., Hubmayr, J., Huffenberger, K.  M., Hughes, J.  P., Koopman, B.  J., Kosowsky, A., Li, Y., Lokken, M., Madhavacheril, M., McMahon, J., Moodley, K., Naess, S., Nati, F., Newburgh, L.  B., Niemack, M.  D., Page, L.  A., Partridge, B., Schaan, E., Schillaci, A., Sifón, C., Spergel, D.  N., Staggs, S.  T., Ullom, J.  N., Vale, L.  R., Van Engelen, A., Van Lanen, J., Wollack, E.  J., and Xu, Z. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies. United States: N. p., 2021. Web. doi:10.1103/physrevd.104.043502.
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Calafut, V., Gallardo, P.  A., Vavagiakis, E.  M., Amodeo, S., Aiola, S., Austermann, J.  E., Battaglia, N., Battistelli, E.  S., Beall, J.  A., Bean, R., Bond, J.  R., Calabrese, E., Choi, S.  K., Cothard, N.  F., Devlin, M.  J., Duell, C.  J., Duff, S.  M., Duivenvoorden, A.  J., Dunkley, J., Dunner, R., Ferraro, S., Guan, Y., Hill, J.  C., Hilton, G.  C., Hilton, M., Hložek, R., Huber, Z.  B., Hubmayr, J., Huffenberger, K.  M., Hughes, J.  P., Koopman, B.  J., Kosowsky, A., Li, Y., Lokken, M., Madhavacheril, M., McMahon, J., Moodley, K., Naess, S., Nati, F., Newburgh, L.  B., Niemack, M.  D., Page, L.  A., Partridge, B., Schaan, E., Schillaci, A., Sifón, C., Spergel, D.  N., Staggs, S.  T., Ullom, J.  N., Vale, L.  R., Van Engelen, A., Van Lanen, J., Wollack, E.  J., & Xu, Z. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies. United States. https://doi.org/10.1103/physrevd.104.043502
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Calafut, V., Gallardo, P.  A., Vavagiakis, E.  M., Amodeo, S., Aiola, S., Austermann, J.  E., Battaglia, N., Battistelli, E.  S., Beall, J.  A., Bean, R., Bond, J.  R., Calabrese, E., Choi, S.  K., Cothard, N.  F., Devlin, M.  J., Duell, C.  J., Duff, S.  M., Duivenvoorden, A.  J., Dunkley, J., Dunner, R., Ferraro, S., Guan, Y., Hill, J.  C., Hilton, G.  C., Hilton, M., Hložek, R., Huber, Z.  B., Hubmayr, J., Huffenberger, K.  M., Hughes, J.  P., Koopman, B.  J., Kosowsky, A., Li, Y., Lokken, M., Madhavacheril, M., McMahon, J., Moodley, K., Naess, S., Nati, F., Newburgh, L.  B., Niemack, M.  D., Page, L.  A., Partridge, B., Schaan, E., Schillaci, A., Sifón, C., Spergel, D.  N., Staggs, S.  T., Ullom, J.  N., Vale, L.  R., Van Engelen, A., Van Lanen, J., Wollack, E.  J., and Xu, Z. Fri . "The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies". United States. https://doi.org/10.1103/physrevd.104.043502. https://www.osti.gov/servlets/purl/1818478.
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@article{osti_1818478,
title = {The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies},
author = {Calafut, V. and Gallardo, P.  A. and Vavagiakis, E.  M. and Amodeo, S. and Aiola, S. and Austermann, J.  E. and Battaglia, N. and Battistelli, E.  S. and Beall, J.  A. and Bean, R. and Bond, J.  R. and Calabrese, E. and Choi, S.  K. and Cothard, N.  F. and Devlin, M.  J. and Duell, C.  J. and Duff, S.  M. and Duivenvoorden, A.  J. and Dunkley, J. and Dunner, R. and Ferraro, S. and Guan, Y. and Hill, J.  C. and Hilton, G.  C. and Hilton, M. and Hložek, R. and Huber, Z.  B. and Hubmayr, J. and Huffenberger, K.  M. and Hughes, J.  P. and Koopman, B.  J. and Kosowsky, A. and Li, Y. and Lokken, M. and Madhavacheril, M. and McMahon, J. and Moodley, K. and Naess, S. and Nati, F. and Newburgh, L.  B. and Niemack, M.  D. and Page, L.  A. and Partridge, B. and Schaan, E. and Schillaci, A. and Sifón, C. and Spergel, D.  N. and Staggs, S.  T. and Ullom, J.  N. and Vale, L.  R. and Van Engelen, A. and Van Lanen, J. and Wollack, E.  J. and Xu, Z.},
abstractNote = {We present a 5.4$\sigma$ detection of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and $\it{Planck}$ CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained using three ACT CMB maps: co-added 150 GHz and 98 GHz maps, combining observations from 2008-2018 (ACT DR5), which overlap with SDSS DR15 over 3,700 sq. deg., and a component-separated map using night-time only observations from 2014-2015 (ACT DR4), overlapping with SDSS DR15 over 2,089 sq. deg. Comparisons of the results from these three maps provide consistency checks in relation to potential frequency-dependent foreground contamination. A total of 343,647 galaxies are used as tracers to identify and locate galaxy groups and clusters from which the kSZ signal is extracted using aperture photometry. We consider the impact of various aperture photometry assumptions and covariance estimation methods on the signal extraction. Theoretical predictions of the pairwise velocities are used to obtain best-fit, mass-averaged, optical depth estimates for each of five luminosity-selected tracer samples. A comparison of the kSZ-derived optical depth measurements obtained here to those derived from the thermal SZ effect for the same sample is presented in a companion paper.},
doi = {10.1103/physrevd.104.043502},
journal = {Physical Review D},
number = 4,
volume = 104,
place = {United States},
year = {Fri Aug 06 00:00:00 EDT 2021},
month = {Fri Aug 06 00:00:00 EDT 2021}
}
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