HI Velocity Dispersions and Flaring: Disk Masses and the Shape of Dark Matter Halos

P. C. van der Kruit*, J. C. O'Brien, K. C. Freeman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

I briefly review the use of measurements of the HI velocity dispersion and gas layer flaring in galaxy disks to determine the baryonic mass of the disks. I compare that to results from stellar dynamics. In systems with low-mass disks, flaring can also provide information on the flattening of the dark matter halos. New results from the thesis of Jess O'Brien are summarized, in particular an application to UGC 7321 that shows the dark matter halo in that galaxy to be close to spherical.

Original languageEnglish
Title of host publicationHunting for the Dark
Subtitle of host publicationThe Hidden Side of Galaxy Formation
EditorsVP Debattista, CC Popescu
Place of PublicationMelville
PublisherAMER INST PHYSICS
Pages387-390
Number of pages4
ISBN (Print)978-0-7354-0786-2
DOIs
Publication statusPublished - 2010
EventInternational Conference on Hunting for the Dark: The Hidden Side of Galaxy Formation - , Malta
Duration: 19-Oct-200923-Oct-2009

Publication series

NameAIP Conference Proceedings
PublisherAMER INST PHYSICS
Volume1240
ISSN (Print)0094-243X

Other

OtherInternational Conference on Hunting for the Dark: The Hidden Side of Galaxy Formation
Country/TerritoryMalta
Period19/10/200923/10/2009

Keywords

  • ON SPIRAL GALAXIES
  • SURFACE PHOTOMETRY
  • STELLAR KINEMATICS
  • MILKY-WAY
  • STABILITY
  • LAYER

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