Local Goup HVCs: Status of the Evidence

Details Local Goup HVCs: Status of the Evidence Local Goup HVCs: Status of the Evidence

2001-05-08

arxiv.org/abs/astro-ph/0105134v2

Astronomy and Astrophysics

Astrophysics

10 pages, no figures -- to appear in Gas and Galaxy Evolution -- Hibbard, Rupen & van Gorkom eds minor changes from original v

Scientific paper

The evidence for locating the High Velocity Clouds in the Local Group is summarized and evaluated. Recent measurements of the H$\alpha$ surface brightness and metallicity of a number of HVCs appear to be fatal to the Galactic fountain as a significant contributor to the HVC phenomenon, but not to the existence of the fountain itself. Observations of extragalactic analogues to HVCs remain the {\it sine qua non} for deciding whether the Local Group hypothesis is viable, but the constraints based on existing surveys appear to be rather weak. MgII quasar absorption lines restrict how many HVC analogues exist at intermediate redshift, depending on where these lines originate. It is concluded that the evidence remains ambiguous, none of the main hypotheses is fully consistent with all of the data, and the Local Group hypothesis remains a viable explanation for the HVC phenomenon.

Affiliated with

Also associated with

No associations

Rating

Local Goup HVCs: Status of the Evidence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Local Goup HVCs: Status of the Evidence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local Goup HVCs: Status of the Evidence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-455004