skip to main content

DOE PAGESDOE PAGES

Title: A Principle Component Analysis of Galaxy Properties from a Large, Gas-Selected Sample

Disney et al. (2008) have found a striking correlation among global parameters of H i -selected galaxies and concluded that this is in conflict with the CDM model. Considering the importance of the issue, we reinvestigate the problem using the principal component analysis on a fivefold larger sample and additional near-infrared data. We use databases from the Arecibo Legacy Fast Arecibo L -band Feed Array Survey for the gas properties, the Sloan Digital Sky Survey for the optical properties, and the Two Micron All Sky Survey for the near-infrared properties. We confirm that the parameters are indeed correlated where a single physical parameter can explain 83% of the variations. When color ( g - i ) is included, the first component still dominates but it develops a second principal component. In addition, the near-infrared color ( i - J ) shows an obvious second principal component that might provide evidence of the complex old star formation. Based on our data, we suggest that it is premature to pronounce the failure of the CDM model and it motivates more theoretical work.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics and Graduate Institute of Astrophysics, National Taiwan University, Taipei 10617, Taiwan, Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan, Institute of Astronomy and Astrophysics, Academia Sinica, Taipei 10617, Taiwan
  2. Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan, Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan
  3. Institute of Astronomy and Astrophysics, Academia Sinica, Taipei 10617, Taiwan
  4. Department of Physics and Graduate Institute of Astrophysics, National Taiwan University, Taipei 10617, Taiwan, Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan, Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305, USA
Publication Date:
OSTI Identifier:
1209578
Grant/Contract Number:
AC03- 76SF00515
Type:
Published Article
Journal Name:
Advances in Astronomy
Additional Journal Information:
Journal Volume: 2012; Related Information: CHORUS Timestamp: 2016-08-02 13:09:14; Journal ID: ISSN 1687-7969
Publisher:
Hindawi Publishing Corporation
Sponsoring Org:
USDOE
Country of Publication:
Country unknown/Code not available
Language:
English