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arXiv:astro-ph/0011384 (astro-ph)
[Submitted on 21 Nov 2000 (v1), last revised 16 Mar 2001 (this version, v2)]

Title:Apparent and actual galaxy cluster temperatures

Authors:Andrew R Liddle, Pedro T P Viana, A Kathy Romer, Robert G Mann
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Abstract: The redshift evolution of the galaxy cluster temperature function is a powerful probe of cosmology. However, its determination requires the measurement of redshifts for all clusters in a catalogue, which is likely to prove challenging for large catalogues expected from XMM--Newton, which may contain of order 2000 clusters with measurable temperatures distributed around the sky. In this paper we study the apparent cluster temperature, which can be obtained without cluster redshifts. We show that the apparent temperature function itself is of limited use in constraining cosmology, and so concentrate our focus on studying how apparent temperatures can be combined with other X-ray information to constrain the redshift. We also briefly study the circumstances in which non-thermal spectral features can give redshift information.
Comments: 7 pages LaTeX file with 13 figures incorporated (uses this http URL and epsf). Minor changes to match MNRAS accepted version
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0011384
  (or arXiv:astro-ph/0011384v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0011384
Journal reference: Mon.Not.Roy.Astron.Soc. 325 (2001) 875
Related DOI: https://doi.org/10.1046/j.1365-8711.2001.04505.x

Submission history

From: Andrew Liddle [view email]
[v1] Tue, 21 Nov 2000 08:11:48 UTC (82 KB)
[v2] Fri, 16 Mar 2001 09:47:21 UTC (82 KB)
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