1997A&AS..123...43S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.05CET23:34:32

1997A&AS..123...43S - Astron. Astrophys., Suppl. Ser., 123, 43-58 (1997/May-2)

WSRT HI synthesis absorption study towards Cassiopeia A.

SCHWARZ U.J., GOSS W.M. and KALBERLA P.M.W.

Abstract (from CDS):

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 0.62km/s. In previous studies, observations are described either with lower velocity resolution or with a limited velocity range (below -30km/s), (Bieging et al. 1991ApJS...75..999B; Reynoso et al. 1997A&A...317..203R). Here we concentrate the discussion on the local HI gas, with velocities between -10 and +10km/s. At a velocity of -1.5km/s we find a cold HI feature with a kinetic temperature of typically 25K, with a small region of 1 by 2arcmin with a kinetic temperature below 10K. This feature can be associated with a 13CO feature observed by Wilson et al. (1993A&A...280..221W). Based on the new HI absorption results we derive the ratio NHI/N(H2)≃0.05 .

Abstract Copyright:

Journal keyword(s): ISM: individual: Cas A - clouds atoms - radio lines: ISM

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1047 1
2 SNR G130.7+03.1 SNR 02 05 37.0 +64 49 42           ~ 553 4
3 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 944 3
4 W 49 SFR 19 10 20 +09 07.7           ~ 502 1
5 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2339 1

    Equat.    Gal    SGal    Ecl

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2019.12.05-23:34:32

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