Forum der Vereinigung der Sternfreunde

Is anything expected to be happening in the WR133 system at the moment? I see a broad excess emisison currently around the He absorption line at 6678A compared with two spectra in the ELODIE archive.

http://tech.groups.yahoo.com/group/astr ... 110701.png
direct link for non members http://tinyurl.com/6h5sebx

This is confirmed in a lower resolution spectrum taken by Christian Buil

http://groups.yahoo.com/group/astronomi ... 69379/view

Robin

Hi Robin:

This could indeed be cery interesting: sounds like excess emission from colliding winds, as the 2 stars
approach periastron passage in the 112d orbit. I'm not sure how to open the Yahoo thing, so could you please send me a spectrum in pdf format? Keep observing it regularly if you can!

Cheers, Tony

_________________
Tony Moffat

Hi Tony,

Hopefully attached should be the full story to date as a pdf for the record. (I now have the fits file of Buil's low resolution spectrum and I am not now sure it confirms the excess emission seen in my spectrum after all )

I guess if the orbit is 112 days things happen rather fast compared with WR140. If we follow this up is there a particular region we should be looking at? (I think John_s originally happened to look here just because he was set up at H alpha)

Thanks
Robin

----- Original Message ----- From: Tony Moffat (fg-spek-convento@vds-astro.de)
To: fg-spek-convento@vds-astro.de (fg-spek-convento@vds-astro.de)
Sent: Tuesday, July 05, 2011 12:05 AM
Subject: [fg-spek] Re: WR133



Hi Robin:

This could indeed be cery interesting: sounds like excess emission from colliding winds, as the 2 stars
approach periastron passage in the 112d orbit. I'm not sure how to open the Yahoo thing, so could you please send me a spectrum in pdf format? Keep observing it regularly if you can!

Cheers, Tony
: ----- Original Message -----
From: Robin Leadbeater (fg-spek-convento(==>)vds-astro.de ([email]fg-spek-convento(==>)vds-astro.de[/email]))
To: fg-spek-convento(==>)vds-astro.de ([email]fg-spek-convento(==>)vds-astro.de[/email]) (fg-spek-convento(==>)vds-astro.de ([email]fg-spek-convento(==>)vds-astro.de[/email]))
Sent: Monday, July 04, 2011 9:59 AM
Subject: [fg-spek] WR133


Is anything expected to be happening in the WR133 system at the moment? I see a broad excess emisison currently around the He absorption line at 6678A compared with two spectra in the ELODIE archive.

http://tech.groups.yahoo.com/group/astr ... 110701.png

This is confirmed in a lower resolution spectrum taken by Christian Buil

http://groups.yahoo.com/group/astronomi ... 69379/view

Robin








Tony Moffat

Hi Robin

Lovely spectrum. I agree with Tony: it could be CW emission.
The test will be if the emission bump moves systematically in t
he next few weeks. The 10830 He I line showed a complex profile
suggesting sub-peak emission (observed years ago, I'm afraid I
didn't follow it up).

All the best
Peredur
-------------------------------------------------------------------
Peredur Williams, Institute for Astronomy, University of Edinburgh

Royal Observatory, e-mail: pmw@roe.ac.uk
Blackford Hill, phone: (+44) (0) 131 668 8300
Edinburgh fax: (+44) (0) 131 668 8416
EH9 3HJ www: http://www.roe.ac.uk/~pmw

-------------------------------------------------------------------

-----Original Message-----
From: Robin Leadbeater [mailto:fg-spek-convento@vds-astro.de]
Sent: Tuesday, July 05, 2011 02:36
To: fg-spek-convento@vds-astro.de
Subject: [fg-spek] Re: WR133


Hi Tony,

Hopefully attached should be the full story to date as a pdf for the record. (I now have the fits file of Buil's low resolution spectrum and I am not now sure it confirms the excess emission seen in my spectrum after all )

I guess if the orbit is 112 days things happen rather fast compared with WR140. If we follow this up is there a particular region we should be looking at? (I think John_s originally happened to look here just because he was set up at H alpha)

Thanks
Robin

----- Original Message ----- From: Tony Moffat ()vds-astro.de">fg-spek-convento(==>)vds-astro.de <mailto:fg-spek-convento(==> )
To: )vds-astro.de">fg-spek-convento(==>)vds-astro.de <mailto:fg-spek-convento(==> ()vds-astro.de">fg-spek-convento(==>)vds-astro.de <mailto:fg-spek-convento(==> )
Sent: Tuesday, July 05, 2011 12:05 AM
Subject: [fg-spek] Re: WR133



Hi Robin:

This could indeed be cery interesting: sounds like excess emission from colliding winds, as the 2 stars
approach periastron passage in the 112d orbit. I'm not sure how to open the Yahoo thing, so could you please send me a spectrum in pdf format? Keep observing it regularly if you can!

Cheers, Tony
: ----- Original Message -----
From: Robin Leadbeater (fg-spek-convento(==>)vds-astro.de ([email]fg-spek-convento(==>)vds-astro.de[/email]))
To: fg-spek-convento(==>)vds-astro.de ([email]fg-spek-convento(==>)vds-astro.de[/email]) (fg-spek-convento(==>)vds-astro.de ([email]fg-spek-convento(==>)vds-astro.de[/email]))
Sent: Monday, July 04, 2011 9:59 AM
Subject: [fg-spek] WR133


Is anything expected to be happening in the WR133 system at the moment? I see a broad excess emisison currently around the He absorption line at 6678A compared with two spectra in the ELODIE archive.

http://tech.groups.yahoo.com/group/astr ... 110701.png

This is confirmed in a lower resolution spectrum taken by Christian Buil

http://groups.yahoo.com/group/astronomi ... 69379/view

Robin








Tony Moffat







--
Scanned by iCritical.

Hi all,
I am an amateur astrononomer who has just joined this forum and am interested in looking for evidence of CW in WR 133. To help me do this I have a couple of questions.

1) Is there an accurate estimate of the next periastron for WR 133? The only paper I could find with a timing in it was that from Underhill and Hill in 1994 who gave a BJD of 2447420.5 and a period of 112.4 days with error +/- 0.2 days. Extrapolating on from this gives next periastron at 16th October +/- 15days.
2) Any particular lines in the optical part of the spectra worth looking at?

I intend to carry out analysis of this star during most of September and October weather permitting using my C14 telescope - with resolution R between 2000 and 3000.

cheers

John Strachan