The Atacama Cosmology Telescope: Detection of the Pairwise Kinematic Sunyaev-Zel'dovich Effect with SDSS DR15 Galaxies

The Atacama Cosmology Telescope: Detection of the Pairwise Kinematic Sunyaev-Zel'dovich Effect with SDSS DR15 Galaxies. 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., Duivenvoorden, A. J., Dunkley, J., Dunner, R., Ferraro, S., Guan, Y., Hill, J. C., Hilton, M., Hlozek, 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., Partridge, B., Schaan, E., Schillaci, A., Sifon, C., Spergel, D. N., Staggs, S. T., Ullom, J. N., Vale, L. R., Van Engelen, A., Wollack, E. J., & Xu, Z. 2021. cite arxiv:2101.08374Comment: 16 pages, 9 figures

Paper abstract bibtex

We present a 5.4$σ$ detection of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and $ıt{Planck}$ 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.

@misc{calafut2021atacama,
  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.},
  added-at = {2021-01-22T04:39:22.000+0100},
  author = {Calafut, Victoria and Gallardo, Patricio A. and Vavagiakis, Eve M. and Amodeo, Stefania and Aiola, Simone and Austermann, Jason E. and Battaglia, Nicholas and Battistelli, Elia S. and Beall, James A. and Bean, Rachel and Bond, J. Richard and Calabrese, Erminia and Choi, Steve K. and Cothard, Nicholas F. and Devlin, Mark J. and Duell, Cody J. and Duivenvoorden, Adriaan J. and Dunkley, Jo and Dunner, Rolando and Ferraro, Simone and Guan, Yilun and Hill, J. Colin and Hilton, Matt and Hlozek, Renee and Huber, Zachary B. and Hubmayr, Johannes and Huffenberger, Kevin M. and Hughes, John P. and Koopman, Brian J. and Kosowsky, Arthur and Li, Yaqiong and Lokken, Martine and Madhavacheril, Mathew and McMahon, Jeff and Moodley, Kavilan and Naess, Sigurd and Nati, Federico and Newburgh, Laura B. and Niemack, Michael D. and Partridge, Bruce and Schaan, Emmanuel and Schillaci, Alessandro and Sifon, Cristobal and Spergel, David N. and Staggs, Suzanne T. and Ullom, Joel N. and Vale, Leila R. and Van Engelen, Alexander and Wollack, Edward J. and Xu, Zhilei},
  biburl = {https://www.bibsonomy.org/bibtex/273a6f8472d3566fb9fb21488f6dfbf24/gpkulkarni},
  description = {The Atacama Cosmology Telescope: Detection of the Pairwise Kinematic Sunyaev-Zel'dovich Effect with SDSS DR15 Galaxies},
  interhash = {5cc53686d763ac51cca81551d04aee7b},
  intrahash = {73a6f8472d3566fb9fb21488f6dfbf24},
  keywords = {library},
  note = {cite arxiv:2101.08374Comment: 16 pages, 9 figures},
  timestamp = {2021-01-22T04:39:22.000+0100},
  title = {The Atacama Cosmology Telescope: Detection of the Pairwise Kinematic
  Sunyaev-Zel'dovich Effect with SDSS DR15 Galaxies},
  url = {http://arxiv.org/abs/2101.08374},
  year = 2021
}

Downloads: 0