spectro-l at Yahoo! Groups

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Bernard Heathcote — Fri, 29 Aug 2008 22:52:53 GMT

There is an interesting collection of WC and WN spectra at http://cfa-www.harvard.edu/~pberlind/atlas/htmls/wrstars.html

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Olivier Thizy — Fri, 29 Aug 2008 16:15:47 GMT

Benji, thanks - this is a good summary! Cordialement, Olivier Thizy /Spectroscopy and observatory dome enslaving solutions http://www.shelyak.com/en/ / ...

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Olivier Thizy — Fri, 29 Aug 2008 16:13:36 GMT

Stan, I think you are right, WR are O-type stars; but they are a special class of O-type stars. Be careful as O-type are not necessarely early in their life.

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Robin Leadbeater — Fri, 29 Aug 2008 15:31:47 GMT

So.... Not all WR stars are massive O type stars and not all PN central stars are WD. Very interesting. I have learned something new today, thank you :-)

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

BM — Fri, 29 Aug 2008 15:12:49 GMT

On Fri, 29 Aug 2008 16:23:05 +0200 Olivier Thizy wrote: Re. ... WR (WC/WN) is a spectral type not a stellar type. So when we find

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

BM — Fri, 29 Aug 2008 14:50:15 GMT

On Fri, 29 Aug 2008 16:33:36 +0200 ... Yes I know, but I just wanted to say that it's bit confusing for beginners that PN has also a name in HD catalog which

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Stan Gorodenski — Fri, 29 Aug 2008 14:34:43 GMT

... I am also confused. I thought WR stars were originally classified as O type stars. 'O' stars are stars early in their evolution, i.e., they are closer to

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Olivier Thizy — Fri, 29 Aug 2008 14:33:37 GMT

Benji, I would agree with you but HD 201192 is actually NGC7026 in Simbad. This is also the HD number given in Conti's WR catalog in 1981. Cordialement,

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Olivier Thizy — Fri, 29 Aug 2008 14:23:08 GMT

Hello, OK, let's see if I understand it well. Massive stars become Luminous Blue Variable (ex: P cygni) then WN-->WC-->SN. What I'm surprised is to see so many

Re: Halpha 60 d cycles in delta Sco

Stan Gorodenski — Fri, 29 Aug 2008 14:19:52 GMT

... I agree. I also don't have a Yahoo account. Maybe even upload it to your web site with a link in your message? This is what I do in my messages in other

Re: Halpha 60 d cycles in delta Sco

BM — Fri, 29 Aug 2008 14:04:11 GMT

On Thu, 28 Aug 2008 18:43:06 -0000 ... Access to this directory isn't possible for those who havn't a Yahoo account. In this mailing list, you can attach the

OHP 2008

BM — Fri, 29 Aug 2008 14:02:17 GMT

Hello Francois, Oliver, When wokshops will available in OHP 2008's web page ? Benji. ~~~~~~~~~~~~~~~~~~~~~/ Handy Book to Science \~~~~~~~~~~~~~~~~~~~~~ If

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

BM — Fri, 29 Aug 2008 13:59:52 GMT

On Fri, 29 Aug 2008 09:27:40 +0200 ... Note that NGC 7026's central star (CS) isn't visble in your spectra and naming a PN as a star's name is a bit triky for

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

BM — Fri, 29 Aug 2008 13:43:26 GMT

On Fri, 29 Aug 2008 09:27:40 +0200 ... Hi Oliver, ... As said also Francis Lefevre during his speach, heavy stars become rapidly WR stars (first WRN, then WRC)

Re: [EN] several Wolf-Rayet stars taken with a Star Analyser

Olivier Thizy — Fri, 29 Aug 2008 07:27:44 GMT

Hello, If all Wolf-Rayet will become SuperNovae, will also NGC7026 or NGC7027 or IC5117 explode some day? They look more Planetary Nebulae on the image...?