Compact, Isolated High-Velocity Clouds

Details Compact, Isolated High-Velocity Clouds Compact, Isolated High-Velocity Clouds

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..312..313b&link_type=abstract

High Velocity Clouds. Edited by Hugo van Woerden, Kapteyn Institute, Groningen, The Netherlands; Bart P. Wakker, University of W

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

We consider the class of compact, isolated, high-velocity H i clouds, CHVCs, which are sharply bounded in angular extent, with no kinematic or spatial connection to other H i features down to a limiting column density of 1.5×1018 cm-2. We describe the automated search algorithm developed by de Heij et al. (2002b) and applied by them to the Leiden-Dwingeloo Survey north of δ=-28° and by Putman et al. (2002) to the Parkes HIPASS data south of δ=0°, resulting in an all-sky catalog numbering 246 CHVCs. We argue that these objects are more likely to represent a single phenomenon in a similar evolutionary state than would a sample that included any of the major HVC complexes. Five principal observables are defined for the CHVC population: (1) the spatial deployment of the objects on the sky, (2) the kinematic distribution, (3) the number distribution of observed H i column densities, (4) the number distribution of angular sizes, and (5) the number distribution of line widths. We show that the spatial and kinematic deployments of the ensemble of CHVCs contain various clues regarding their characteristic distance. These clues are not compatible with a location of the ensemble within the Galaxy proper. The deployments resemble in several regards those of the Local Group galaxies.

Affiliated with

Also associated with

No associations

Rating

Compact, Isolated High-Velocity Clouds 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 Compact, Isolated High-Velocity Clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact, Isolated High-Velocity Clouds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1839783