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http://hdl.handle.net/2289/6234Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Singh, Priyanka | - |
| dc.contributor.author | Nath, Biman B. | - |
| dc.contributor.author | Majumdar, S. | - |
| dc.contributor.author | Silk, Joseph | - |
| dc.date.accessioned | 2015-05-13T06:12:15Z | - |
| dc.date.available | 2015-05-13T06:12:15Z | - |
| dc.date.issued | 2015-04-11 | - |
| dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, 2015, Vol. 448, p2384-2396 | en |
| dc.identifier.issn | 0035-8711 | - |
| dc.identifier.issn | 1365-2966 - (online) | - |
| dc.identifier.uri | http://hdl.handle.net/2289/6234 | - |
| dc.description | Open Access | en |
| dc.description.abstract | We study the Sunyaev–Zel'dovich (SZ) distortion of the cosmic microwave background radiation from extensive circumgalactic gas (CGM) in massive galactic haloes. Recent observations have shown that galactic haloes contain a large amount of X-ray emitting gas at the virial temperature, as well as a significant amount of warm O vi absorbing gas. We consider the SZ distortion from the hot gas in those galactic haloes in which the gas cooling time is longer than the halo destruction time-scale. We show that the SZ distortion signal from the hot gas in these galactic haloes at redshifts z ≈ 1–8 can be significant at small angular scales (ℓ ∼ 104), and dominate over the signal from galaxy clusters. The estimated SZ signal for most massive galaxies (halo mass ≥1012.5 M⊙) is consistent with the marginal detection by Planck at these mass scales. We also consider the SZ effect from warm circumgalactic gas. The integrated Compton distortion from the warm O vi absorbing gas is estimated to be y ∼ 10−8, which could potentially be detected by experiments planned for the near future. Finally, we study the detectability of the SZ signal from circumgalactic gas in two types of surveys, a simple extension of the South Pole Telescope survey and a more futuristic cosmic-variance-limited survey. We find that these surveys can easily detect the kinetic Sunyaev–Zel'dovich signal from CGM. With the help of a Fisher matrix analysis, we find that it will be possible for these surveys to constrain the gas fraction in CGM, after marginalizing over cosmological parameters, to ≤33 per cent, in case of no redshift evolution of the gas fraction. | en |
| dc.language.iso | en | en |
| dc.publisher | Oxford University Press for the Royal Astronomical Society | en |
| dc.relation.uri | http://adsabs.harvard.edu/abs/2015MNRAS.448.2384S | en |
| dc.relation.uri | http://arxiv.org/abs/1408.4896 | en |
| dc.relation.uri | http://dx.doi.org/10.1093/mnras/stv155 | en |
| dc.rights | 2015 The authors & the Royal Astronomical Society | en |
| dc.title | CMB distortion from circumgalactic gas | en |
| dc.type | Article | en |
| Appears in Collections: | Research Papers (A&A) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2015_MNRAS_448_2384-96.pdf | Open Access | 1.16 MB | Adobe PDF | View/Open |
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