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 :
Image
etienne bertrand
 
Posts: 838
Joined: Mon Aug 31, 2015 11:26 am

Re: RR Lyr - 2019.07.15

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

what is the time step for these spectra?
Hamish Barker
 
Posts: 40
Joined: Thu Jun 20, 2019 12:11 am

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:
https://ui.adsabs.harvard.edu/abs/2019A%26A...623A.109G/abstract
But variations from cycle to cycle isn't tretated there. That's why observations are needed.

Benji
Benjamin Mauclaire
 
Posts: 171
Joined: Thu Sep 29, 2011 10:14 am


Return to RR Lyrae

Who is online

Users browsing this forum: No registered users and 1 guest

x