A Principle Component Analysis of Galaxy Properties from a Large, Gas-Selected Sample
Joint Authors
Chao, Rikon
Chen, Pisin
Chang, Yu-Yen
Wang, Wei-Hao
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-23
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Disney et al.
(2008) have found a striking correlation among global parameters of Hi-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.
American Psychological Association (APA)
Chang, Yu-Yen& Chao, Rikon& Wang, Wei-Hao& Chen, Pisin. 2012. A Principle Component Analysis of Galaxy Properties from a Large, Gas-Selected Sample. Advances in Astronomy،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-454687
Modern Language Association (MLA)
Chang, Yu-Yen…[et al.]. A Principle Component Analysis of Galaxy Properties from a Large, Gas-Selected Sample. Advances in Astronomy No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-454687
American Medical Association (AMA)
Chang, Yu-Yen& Chao, Rikon& Wang, Wei-Hao& Chen, Pisin. A Principle Component Analysis of Galaxy Properties from a Large, Gas-Selected Sample. Advances in Astronomy. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-454687
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-454687