1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6460
Full metadata record
DC FieldValueLanguage
dc.contributor.authorSingh, Priyanka-
dc.contributor.authorMajumdar, Subhabrata-
dc.contributor.authorNath, Biman B.-
dc.contributor.authorRefregier, Alexandre-
dc.contributor.authorSilk, Joseph-
dc.date.accessioned2016-10-20T06:20:19Z-
dc.date.available2016-10-20T06:20:19Z-
dc.date.issued2016-02-21-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2016, Vol. 456, p1495-1507en_US
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 - (online)-
dc.identifier.urihttp://hdl.handle.net/2289/6460-
dc.descriptionOpen Accessen_US
dc.description.abstractWe study the cross-correlation of distribution of galaxies, the Sunyaev-Zel'dovich (SZ) and X-ray power spectra of galaxies from current and upcoming surveys and show these to be excellent probes of the nature, i.e. extent, evolution and energetics, of the circumgalactic medium (CGM). The SZ-galaxy cross-power spectrum, especially at large multipoles, depends on the steepness of the pressure profile of the CGM. This property of the SZ signal can, thus, be used to constrain the pressure profile of the CGM. The X-ray cross-power spectrum also has a similar shape. However, it is much more sensitive to the underlying density profile. We forecast the detectability of the cross-correlated galaxy distribution, SZ and X-ray signals by combining South Pole Telescope-Dark Energy Survey (SPT-DES) and eROSITA-DES/eROSITA-LSST (extended ROentgen Survey with an Imaging Telescope Array-Large Synoptic Survey Telescope) surveys, respectively. We find that, for the SPT-DES survey, the signal-to-noise ratio peaks at high mass and redshift with signal-to-noise ratio ∼9 around Mh ∼ 1013 h−1 M⊙ and z ∼ 1.5–2 for flat density and temperature profiles. The signal-to-noise ratio peaks at ∼6(12) for the eROSITA-DES (eROSITA-LSST) surveys. We also perform a Fisher matrix analysis to find the constraint on the gas fraction in the CGM in the presence or absence of an unknown redshift evolution of the gas fraction. Finally, we demonstrate that the cross-correlated SZ-galaxy and X-ray-galaxy power spectrum can be used as powerful probes of the CGM energetics and potentially discriminate between different feedback models recently proposed in the literature; for example, one can distinguish a ‘no active galactic nuclei feedback’ scenario from a CGM energized by ‘fixed-velocity hot winds’ at greater than 3σ.en_US
dc.language.isoenen_US
dc.publisherOxford University Press for the Royal Astronomical Societyen_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2016MNRAS.456.1495Sen_US
dc.relation.urihttp://arxiv.org/abs/1505.03658en_US
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stv2750en_US
dc.rights2016 The authors & the Royal Astronomical Societyen_US
dc.titleProbing the circumgalactic baryons through cross-correlationsen_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2016_MNRAS_456_1495.pdf
  Restricted Access		Open Access1.85 MBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.