Need of observations

VV Cep 2017-2019 Campaign
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Ernst Pollmann
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Joined: Mon Sep 26, 2011 7:16 pm

Need of observations

Post by Ernst Pollmann »

Dear colleagues,
although the eclipse of VV Cep is behind us, further observations are useful.
Why?
The campaign from 2015 to 2019 leads to the discovery of a 51 day precession period of the radial velocity of the V emission in the Halpha double peak profile (see Fig. below).
There is a need to find out whether this periodicity will persist until the next periastron passage in March 2025 and beyond.
Perhaps some observers will find again interest in contributing to clarifying this question with their spectra.
Fig. 5.png
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Ernst Pollmann
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: Need of observations

Post by Olivier GARDE »

Here's a spectrum of VV Cep taken last night with a whoppshel spectrograph (R=30000)

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

Re: Need of observations

Post by Ernst Pollmann »

Dear Olivier,
please be so kind to send me your 1D file for evaluation.

Thanks,
Ernst
Olivier GARDE
Posts: 1243
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE
Contact:

Re: Need of observations

Post by Olivier GARDE »

Dear Ernst,

No problem, I will send you it by e-mail now.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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