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| WR133 https://forum.vdsastro.de/viewtopic.php?t=3636 |
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| Autor: | Robin Leadbeater [ 04. Juli 2011, 15:59:12 PM ] |
| Betreff des Beitrags: | 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 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 |
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| Autor: | Tony Moffat [ 05. Juli 2011, 01:05:10 AM ] |
| Betreff des Beitrags: | 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 Zitat: ----- Original Message -----
From: Robin Leadbeater (fg-spek-convento@vds-astro.de) To: fg-spek-convento@vds-astro.de (fg-spek-convento@vds-astro.de) 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 |
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| Autor: | Robin Leadbeater [ 05. Juli 2011, 03:21:37 AM ] | ||
| Betreff des Beitrags: | 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 (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
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| Autor: | Peredur Williams [ 05. Juli 2011, 12:40:01 PM ] |
| Betreff des Beitrags: | WR133 |
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. |
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| Autor: | John Strachan [ 10. Juli 2011, 12:39:33 PM ] |
| Betreff des Beitrags: | |
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 |
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