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Clustering of H i galaxies in the H i Parkes All Sky Survey and Arecibo Legacy Fast ALFA Survey
- Source :
- Monthly Notices of the Royal Astronomical Society: Letters. 412:L50-L54
- Publication Year :
- 2011
- Publisher :
- Oxford University Press (OUP), 2011.
-
Abstract
- We investigate the clustering of H I-selected galaxies in the Arecibo Legacy Fast ALFA Survey (ALFALFA) and compare results with those obtained for the H I Parkes All Sky Survey (HIPASS). Measurements of the angular correlation function and the inferred 3D clustering are compared with results from direct spatial-correlation measurements. We are able to measure clustering on smaller angular scales and for galaxies with lower H I masses than was previously possible. We calculate the expected clustering of dark matter using the redshift distributions of the HIPASS and ALFALFA, and show that the ALFALFA sample is somewhat more antibiased with respect to dark matter than the HIPASS sample.
- Subjects :
- Physics
media_common.quotation_subject
HIPASS
Dark matter
Astronomy
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Galaxy
Redshift
Space and Planetary Science
Sky
Cluster analysis
Astrophysics::Galaxy Astrophysics
media_common
Angular correlation function
Subjects
Details
- ISSN :
- 17453925
- Volume :
- 412
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society: Letters
- Accession number :
- edsair.doi...........a43d7d0bff87134be63f29a20031a499