RR Lyr - 2019.07.15

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etienne bertrand
Posts: 1040
Joined: Mon Aug 31, 2015 11:26 am

RR Lyr - 2019.07.15

Post by etienne bertrand »

Chouette observation de l'étoile RR Lyr :
Image
Hamish Barker
Posts: 226
Joined: Thu Jun 20, 2019 12:11 am

Re: RR Lyr - 2019.07.15

Post by Hamish Barker »

what is the time step for these spectra?
Benjamin Mauclaire
Posts: 258
Joined: Thu Sep 29, 2011 10:14 am

Re: RR Lyr - 2019.07.15

Post by Benjamin Mauclaire »

Hello Hamish,

Pulsating stars such as RR Lyr have rapid evolution during their pulsation cycle.
As RR Lyr pulsating period is ~13h, time series is needed to study it, ie adding spectra must not be done.
Etienne's spectra exposure is 600s, as anoted in the animation's title.
RR Lyr maximum duration is about 30 min.
Maximum's date is needed to study astmosphere's dynamics and Blazhko effect.

In our last A&A paper, we've described a "typical" pulsation cycle:
https://ui.adsabs.harvard.edu/abs/2019A ... G/abstract
But variations from cycle to cycle isn't tretated there. That's why observations are needed.

Benji
Spcaudace spectroscopy software: saving you hundred hours of frustration.
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