Constraints on the space density of extragalactic HVCs

MA Zwaan*

*Corresponding author for this work

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

Abstract

High Velocity Clouds (HVCs) have recently attracted renewed attention with the proposal of their being long lived, massive dark matter dominated clouds of primordial composition distributed throughout the Local Group. In this picture the HVCs would contain a few x 10(7) M. of H I and would be at distances of a few hundred kpc to 1.5 Mpc from the Local Group barycenter. If this extragalactic interpretation of HVCs is true, similar clouds are expected in other galaxy groups and around galaxies. We discuss the limits blind H I surveys and QSO absorption line studies put on this proposed population of clouds.

Original languageEnglish
Title of host publicationMAPPING THE HIDDEN UNIVERSE: THE UNIVERSE BEHIND THE MILKY WAY - THE UNIVERSE IN HI, PROCEEDINGS
EditorsRC KraanKorteweg, PA Henning, H Andernach
Place of PublicationSAN FRANCISCO
PublisherASTRONOMICAL SOC PACIFIC
Pages419-426
Number of pages8
ISBN (Print)1-58381-050-1
Publication statusPublished - 2000
EventInternational Meeting on Mapping the Hidden Universe - , Mexico
Duration: 23-Feb-200029-Feb-2000

Publication series

NameASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES
PublisherASTRONOMICAL SOC PACIFIC
Volume218

Other

OtherInternational Meeting on Mapping the Hidden Universe
CountryMexico
Period23/02/200029/02/2000

Keywords

  • HIGH-VELOCITY CLOUDS
  • LOCAL GROUP
  • GALAXIES
  • DWARF
  • GAS

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