Forum der Vereinigung der Sternfreunde

RR Lyr is a pulsating star that is regularly observed by amateur in spectroscopy since 2013.
As part of a pro/am collaboration program initiated by Denis Gillet, astrophysicist and research director from CNRS at the Observatoire de Haute Provence, an observer group was formed and named GRRR (Group of Research on RR Lyrae).

Thanks to their numerous measurements, it was possible to observe for the first time in the world in RR Lyr, the presence of the third apparition in emission of the Halpha line in its cycle of pulsation, around phase 0.3.

The article has just been accepted in Astronomy & Astrophysics (A & A) and is publicly available here:
https://arxiv.org/abs/1709.03556

The originality of this publication lies in the important involvement of amateurs : This is the first publication in spectroscopy where an amateur, Benjamin Mauclaire, carried out the analysis of the data, produced measurements and graphs, and drafted a large part of the article. This work, particularly the interpretation, was carried out in close collaboration with two passionate professional astronomers: Denis Gillet and Philippe Mathias astrophysicists respectively at the Observatoire de Haute Provence (OHP) and the Observatoire Midi-Pyrénées (OMP).
One of the aims of this collaboration is to enable amateurs to learn how to analyze their own data for publication in a peer-reviewed journal, as in the case of Astronomy & Astrophysics.

In addition to the observations made by each amateur with his personal material, both in photometry and spectroscopy, observations were also made on the T152 of the Observatoire de Haute Provence with the Aurelie spectrograph by amateurs during several campaigns of measures, memorable moments, that contributed to the development of this article.

To know all about GRRR:
https://www.pulsating-stars.org

However, there are a number of phenomena that are not yet understood, including the famous Blazhko effect.

If you wish to participate in this scientific and human adventure, you can join the group to submit your spectroscopic and / or photometric observations:

https://fr.groups.yahoo.com/neo/groups/ ... Lyrae/info