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Probing the bias of radio sources at high redshift
- Source :
- Monthly Notices of the Royal Astronomical Society. 429:2183-2190
- Publication Year :
- 2013
- Publisher :
- Oxford University Press (OUP), 2013.
-
Abstract
- The relationship between the clustering of dark matter and that of luminous matter is often described using the bias parameter. Here, we provide a new method to probe the bias of intermediate to high-redshift radio continuum sources for which no redshift information is available. We matched radio sources from the Faint Images of the Radio Sky at Twenty centimetres (FIRST) survey data to their optical counterparts in the Sloan Digital Sky Survey (SDSS) to obtain photometric redshifts for the matched radio sources. We then use the publicly available semi-empirical simulation of extragalactic radio continuum sources (S3) to infer the redshift distribution for all FIRST sources and estimate the redshift distribution of unmatched sources by subtracting the matched distribution from the distribution of all sources. We infer that the majority of unmatched sources are at higher redshifts than the optically matched sources and demonstrate how the angular scales of the angular two-point correlation function can be used to probe different redshift ranges. We compare the angular clustering of radio sources with that expected for dark matter and estimate the bias of different samples.<br />Comment: 9 Pages, 5 figures, Accepted to MNRAS
- Subjects :
- Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Astrophysics::High Energy Astrophysical Phenomena
media_common.quotation_subject
Dark matter
FOS: Physical sciences
Astronomy
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Redshift survey
Redshift
Methods statistical
Space and Planetary Science
Sky
Data analysis
Cluster analysis
Astrophysics - Cosmology and Nongalactic Astrophysics
media_common
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 429
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....2d13f1ad7caac06d62496f15d1a678a9