Rotating disk galaxies - Yet another case for dark matter
Journal Article
·
· Astrophysical Journal; (USA)
- Trieste, Osservatorio Astronomico (Italy) Durham Univ. (England)
A method to probe the systematic variations of the dark matter mass fraction (DM) in the optical region of disk galaxies is proposed, based on studying the correlation between galaxy luminosity and the normalized radius where the rotation frequency exceeds a given multiple of the rotation frequency as measured at the optical disk radius. The results strongly suggest the ubiquitous existence of DM throughout the luminosity sequence of galaxies, thereby challenging the possibility that luminous matter alone can be responsible for the observed disk dynamics. By modeling the distribution of dark matter by means of a pseudoisothermal halo, it is shown that the disk-to-halo mass ratio at the optical edge varies with luminosity. 42 refs.
- OSTI ID:
- 6643727
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 356; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dark matter in spiral galaxies
Dark matter in spiral galaxies. I. Galaxies with optical rotation curves
The distribution of dark matter in the dwarf galaxy DDO 170
Journal Article
·
Tue May 01 00:00:00 EDT 1990
· Astrophysical Journal; (USA)
·
OSTI ID:6690290
Dark matter in spiral galaxies. I. Galaxies with optical rotation curves
Journal Article
·
Sun Jun 01 00:00:00 EDT 1986
· Astron. J.; (United States)
·
OSTI ID:5199067
The distribution of dark matter in the dwarf galaxy DDO 170
Journal Article
·
Wed Jan 31 23:00:00 EST 1990
· Astronomical Journal; (USA)
·
OSTI ID:7163681