Daresbury Laboratory ISSN 0962-6034

NEWSLETTER ON ANALYSIS OF ASTRONOMICAL SPECTRA

An informal Newsletter issued biannually by Collaborative Computational Project No. 7 on the Analysis of Astronomical Spectra.

Number 21, September 1994


Contents

Computational matters

C.S.Jeffery
WWW and ftp services on the CCP7 workstation
P.Lockey
PVM - the Parallel Virtual Machine

Proceedings of a CCP7 Workshop: Hydrogen-deficient stellar systems; St Andrews University, March 1994

C.S.Jeffery
Stars and stellar systems deficient in hydrogen ( Figure 1)
K.Werner
Hot hydrogen-deficient post-AGB stars
S.Dreizler, K.Werner & U.Heber
PG 1159 stars and their evolutionary link to DO white dwarfs
M.A.Barstow, K.Werner, E.M.Sion, J.B.Holberg & I.Hubeny
Extreme/far UV observations of the DO white dwarf RE0503-289
U.Heber, S.Dreizler & K.Werner
Quantitative spectroscopy of K648 - the PNN of Ps1 in the globular cluster M15
U.Leuenhagen
Spectral analysis of [WC]-type central stars
A.A.Zijlstra
[WC] central stars of planetary nebulae
C.S.Jeffery
Atmospheric parameters for B- and A-type hydrogen-deficient stars
G.C.Clayton
The formation of dust and RCrB-type variability
M.Asplund
Spectroscopy of RY Sgr during the 1993 minimum
J.S.Drilling, G.C.Clayton & B.A.Whitney
The ultraviolet extinction curve for circumstellar dust formed in a hydrogen-poor environment
H.J.Walker
Do R CrB stars have ‘fossil’ dust shells
C.M.Jomaron, M.N.Dunstan & P.W.Hill
Identification of new HdC/RCB stars
C.J.Corbally & R.O.Gray
Are there hydrogen-deficient FHB stars ?
R.P.Fender & S.J.Bell Burnell
Cygnus X-3: Wolf-Rayet + compact object ?
T.R.Marsh
AM Cvn systems
E.M.Sion & J.-E.Solheim
AM Canum Venaticorum
H.Saio
Pulsational properties of H-deficient stars

Workshop announcements

30 Sept 1994: Kent at Canterbury
The Interstellar Medium and Planetary Science Connection: The Shoemaker-Levy 9 Jupiter Impact
9-12 Jan 1995: UMIST
Shocks in Astrophysics
July 1995: Lille, France
The Physics and Chemistry of the Interstellar Medium

Editor

C.S.Jeffery, Dept. of Physics & Astronomy, University of St Andrews, FIFE KY16 9SS, Scotland UK,
csj@st-and.ac.uk