RR Lyr - 2019.07.15

RR Lyr - 2019.07.15

Postby etienne bertrand » Mon Jul 15, 2019 11:09 am

Chouette observation de l'étoile RR Lyr :
etienne bertrand
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Re: RR Lyr - 2019.07.15

Postby Hamish Barker » Tue Jul 16, 2019 4:59 am

what is the time step for these spectra?
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Re: RR Lyr - 2019.07.15

Postby Benjamin Mauclaire » Tue Jul 16, 2019 3:18 pm

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:
But variations from cycle to cycle isn't tretated there. That's why observations are needed.

Spcaudace spectroscopy software: saving you hundred hours of frustration.
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