WR137 bande CIII & CIV

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Olivier GARDE
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Joined: Thu Sep 29, 2011 6:35 am
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WR137 bande CIII & CIV

Post by Olivier GARDE »

Here's a spectrum of WR 137 taken 2 nights ago with eshel spectrograph (R=11000) : 1 hour total exposure (6 exposures of 10 minutes each)

I took two spectra with 3 hours interval to see if there were significant changes on CIII and CIV lines of the spectrum.

With 3 hours interval, I can not see main changes in CIII for example, there has some smalls differences, but this is noise or a real change ?

In the coming days I will try to achieve other spectra.

Voici un spectre de WR 137 réalisé dans la nuit de jeudi à vendredi avec le spectro eshel (R=11000) : 1 heure de pose totale (6 poses individuelles de 10 minutes chacune)
J'ai pris 2 spectres à 3 heures d'interval pour voir s'il y avait des changements significatifs sur les bande CIII et CIV du spectre.

Avec 3 heures d'interval on ne peut pas voir grand chose dans ce qui se passe dans CIII par exemple, il y a certe quelques différences, mais est ce du bruit ou une réelle évolution ?

Dans les prochains jour j'essayerai de réaliser d'autres spectres pour les comparer.

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Robin Leadbeater
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Joined: Mon Sep 26, 2011 4:41 pm
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Re: WR137 bande CIII & CIV

Post by Robin Leadbeater »

Hello Olivier,

The changes are probably real. They are produced by variations in the stellar wind.
They have been studied in Pro Am projects in the Convento group.
http://www.stsci.de/convento/
http://www.stsci.de/wr134/index.htm
Here is an example of the effects in WR134 measured in 2013
http://www.astro.umontreal.ca/~emily/CA ... er2015.pdf
WR137 was also measured in the same campaign. I will post some of the spectra I measured for comparison.

Cheers
Robin

EDIT:-

My measurements of WR137 in 2013 are now attached

Robin
Attachments
20130711-20_wr137_THO.png
20130711-20_wr137_THO.png (8.96 KiB) Viewed 6988 times
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Robin Leadbeater
Posts: 1952
Joined: Mon Sep 26, 2011 4:41 pm
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Re: WR137 bande CIII & CIV

Post by Robin Leadbeater »

Some more measurements of WR137 from 2012
http://spektroskopieforum.vdsastro.de/v ... =32&t=3878

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Olivier GARDE
Posts: 1267
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
Contact:

Re: WR137 bande CIII & CIV

Post by Olivier GARDE »

Hello Robin,

Thank you very much for this useful information.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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