Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data
The fraction of ionized gas in the warm–hot intergalactic medium induces temperature anisotropies on the cosmic microwave background similar to those of clusters of galaxies. The Sunyaev–Zel'dovich (SZ) anisotropies due to these low-density, weakly non-linear, baryon filaments cannot be disting...
Published in: | Monthly Notices of the Royal Astronomical Society |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2013
|
Subjects: | |
Online Access: | http://mnras.oxfordjournals.org/cgi/content/short/stt619v1 https://doi.org/10.1093/mnras/stt619 |
id |
fthighwire:oai:open-archive.highwire.org:mnras:stt619v1 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:mnras:stt619v1 2023-05-15T18:22:52+02:00 Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data Génova-Santos, Ricardo Suárez-Velásquez, I. Atrio-Barandela, F. Mücket, J. P. 2013-05-10 01:38:32.0 text/html http://mnras.oxfordjournals.org/cgi/content/short/stt619v1 https://doi.org/10.1093/mnras/stt619 en eng Oxford University Press http://mnras.oxfordjournals.org/cgi/content/short/stt619v1 http://dx.doi.org/10.1093/mnras/stt619 Copyright (C) 2013, Oxford University Press Article TEXT 2013 fthighwire https://doi.org/10.1093/mnras/stt619 2013-05-27T20:20:35Z The fraction of ionized gas in the warm–hot intergalactic medium induces temperature anisotropies on the cosmic microwave background similar to those of clusters of galaxies. The Sunyaev–Zel'dovich (SZ) anisotropies due to these low-density, weakly non-linear, baryon filaments cannot be distinguished from that of clusters using frequency information, but they can be separated since their angular scales are very different. To determine the relative contribution of the WHIM SZ signal to the radiation power spectrum of temperature anisotropies, we explore the parameter space of the concordance Λ cold dark matter model using Monte Carlo Markov chains and the Wilkinson Microwave Anisotropy Probe 7 yr and South Pole Telescope data. We find marginal evidence of a contribution by diffuse gas, with amplitudes of A WHIM = 10–20 μK2, but the results are also compatible with a null contribution from the WHIM, allowing us to set an upper limit of A WHIM < 43 μK2 (95.4 per cent CL). The signal produced by galaxy clusters remains at A CL = 4.5 μK2, a value similar to what is obtained when no WHIM is included. From the measured WHIM amplitude, we constrain the temperature–density phase diagram of the diffuse gas, and find it to be compatible with numerical simulations. The corresponding baryon fraction in the WHIM varies from 0.43 to 0.47, depending on model parameters. The forthcoming Planck data could set tighter constraints on the temperature–density relation. Text South pole HighWire Press (Stanford University) South Pole Wilkinson ENVELOPE(-66.200,-66.200,-66.817,-66.817) Monthly Notices of the Royal Astronomical Society 432 3 2480 2487 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Article |
spellingShingle |
Article Génova-Santos, Ricardo Suárez-Velásquez, I. Atrio-Barandela, F. Mücket, J. P. Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data |
topic_facet |
Article |
description |
The fraction of ionized gas in the warm–hot intergalactic medium induces temperature anisotropies on the cosmic microwave background similar to those of clusters of galaxies. The Sunyaev–Zel'dovich (SZ) anisotropies due to these low-density, weakly non-linear, baryon filaments cannot be distinguished from that of clusters using frequency information, but they can be separated since their angular scales are very different. To determine the relative contribution of the WHIM SZ signal to the radiation power spectrum of temperature anisotropies, we explore the parameter space of the concordance Λ cold dark matter model using Monte Carlo Markov chains and the Wilkinson Microwave Anisotropy Probe 7 yr and South Pole Telescope data. We find marginal evidence of a contribution by diffuse gas, with amplitudes of A WHIM = 10–20 μK2, but the results are also compatible with a null contribution from the WHIM, allowing us to set an upper limit of A WHIM < 43 μK2 (95.4 per cent CL). The signal produced by galaxy clusters remains at A CL = 4.5 μK2, a value similar to what is obtained when no WHIM is included. From the measured WHIM amplitude, we constrain the temperature–density phase diagram of the diffuse gas, and find it to be compatible with numerical simulations. The corresponding baryon fraction in the WHIM varies from 0.43 to 0.47, depending on model parameters. The forthcoming Planck data could set tighter constraints on the temperature–density relation. |
format |
Text |
author |
Génova-Santos, Ricardo Suárez-Velásquez, I. Atrio-Barandela, F. Mücket, J. P. |
author_facet |
Génova-Santos, Ricardo Suárez-Velásquez, I. Atrio-Barandela, F. Mücket, J. P. |
author_sort |
Génova-Santos, Ricardo |
title |
Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data |
title_short |
Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data |
title_full |
Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data |
title_fullStr |
Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data |
title_full_unstemmed |
Constraints on the Sunyaev-Zel'dovich signal from the warm-hot intergalactic medium from WMAP and SPT data |
title_sort |
constraints on the sunyaev-zel'dovich signal from the warm-hot intergalactic medium from wmap and spt data |
publisher |
Oxford University Press |
publishDate |
2013 |
url |
http://mnras.oxfordjournals.org/cgi/content/short/stt619v1 https://doi.org/10.1093/mnras/stt619 |
long_lat |
ENVELOPE(-66.200,-66.200,-66.817,-66.817) |
geographic |
South Pole Wilkinson |
geographic_facet |
South Pole Wilkinson |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://mnras.oxfordjournals.org/cgi/content/short/stt619v1 http://dx.doi.org/10.1093/mnras/stt619 |
op_rights |
Copyright (C) 2013, Oxford University Press |
op_doi |
https://doi.org/10.1093/mnras/stt619 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
432 |
container_issue |
3 |
container_start_page |
2480 |
op_container_end_page |
2487 |
_version_ |
1766202290398560256 |