Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· References in the article
· Citations to the Article (8) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (5)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
WSRT HI synthesis absorption study towards Cassiopeia A
Authors:
Schwarz, U. J.; Goss, W. M.; Kalberla, P. M. W.
Affiliation:
AA(Kapteyn Astronomical Institute, Groningen University, Postbus 800, 9700 AV Groningen, The Netherlands), AB(National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801, U.S.A.), AC(Radioastronomisches Institut, Universitat Bonn, Auf dem Hugel 71, D 53121 Bonn 1, Germany)
Publication:
A & A Supplement series, Vol. 123, May II 1997, 43-58. (A&AS Homepage)
Publication Date:
05/1997
Origin:
A&AS
A&A Keywords:
ISM: CAS; CLOUDS ATOMS, RADIO LINES: ISM
DOI:
10.1051/aas:1997305
Bibliographic Code:
1997A&AS..123...43S

Abstract

We present high resolution images of the entire galactic HI spectrum of Cas A and display the whole data cube in various ways; the spatial resolution is 30 arcsec and the velocity resolution is 0.62 km s^{-1}. In previous studies, observations are described either with lower velocity resolution or with a limited velocity range (below -30 km s^{-1}), \cite[(Bieging et al. 1991]{Bieging91}; \cite[Reynoso et al. 1997)]{Reyno96}. Here we concentrate the discussion on the local HI gas, with velocities between -10 and +10 km s^{-1}. At a velocity of -1.5 km s^{-1} we find a cold HI feature with a kinetic temperature of typically 25 K, with a small region of 1 by 2 arcmin with a kinetic temperature below 10 K. This feature can be associated with a 13CO feature observed by \cite[Wilson et al. (1993)]{Wilson93}. Based on the new HI absorption results we derive the ratio NHI/N({H}_2) \approx 0.05.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints