Need of observations

VV Cep 2017-2019 Campaign
Moderator for this forum: Ernst Pollmann

Need of observations

Postby Ernst Pollmann » Thu Oct 22, 2020 1:22 pm

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
Fig. 5.png (190.46 KiB) Viewed 2182 times

Ernst Pollmann
Ernst Pollmann
 
Posts: 415
Joined: Mon Sep 26, 2011 7:16 pm

Re: Need of observations

Postby Olivier GARDE » Sat Oct 31, 2020 3:31 pm

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
Olivier GARDE
 
Posts: 1148
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE

Re: Need of observations

Postby Ernst Pollmann » Sun Nov 01, 2020 1:45 pm

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

Thanks,
Ernst
Ernst Pollmann
 
Posts: 415
Joined: Mon Sep 26, 2011 7:16 pm

Re: Need of observations

Postby Olivier GARDE » Sun Nov 01, 2020 3:32 pm

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
Olivier GARDE
 
Posts: 1148
Joined: Thu Sep 29, 2011 6:35 am
Location: Rhône Alpes FRANCE


Return to VV Cep

Who is online

Users browsing this forum: No registered users and 1 guest

x