Be - I Pup

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Be - I Pup

Postby Emmanuel Jeffredo » Sun May 03, 2020 7:03 am

Bonjour à tous,

Mes premiers essais avec le Lhirès III (Célestron C8 - 5x300s - ASI 1600).
Les 2 pics de la raie d'émission correspondent ils aux deux étoiles du système, ou bien est ce du à un autre phénomène ?

Merci,

Emmanuel
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I pup 26/04/2020
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Emmanuel Jeffredo
 
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Re: Be - I Pup

Postby Valerie Desnoux » Sun May 03, 2020 10:22 am

Bonjour Emmanuel
Il peut s'agir comme pour les etoiles Be, ou Herbig d'un disque circumstellaire ou tout autre matiere entourant l'etoile qui re-emet sous l'excitation du flux de l'étoile. Mais je ne connais pas ce type de variable. Tu es sur sinon que c'est une étoile double ? pas vu dans Simbad.
Valerie
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Re: Be - I Pup

Postby Robin Leadbeater » Sun May 03, 2020 11:53 am

Is this I Pup (HD55892) or L Pup (HD62623) ? L Pup (3 Pup) is thought to be a blue supergiant in a binary system with accretion and shows a double peak H alpha profile

https://academic.oup.com/mnras/article/ ... 03/1050056

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: Be - I Pup

Postby Robin Leadbeater » Sun May 03, 2020 12:14 pm

If it is L Pup, this paper attempts to model the various emission line profile shapes produced in the stellar wind of hot giant stars. (Note this is different from the emission from circumstellar discs seen in classical Be stars)
https://ui.adsabs.harvard.edu/abs/1993A ... C/abstract

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Robin Leadbeater
 
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Re: Be - I Pup

Postby Emmanuel Jeffredo » Sun May 03, 2020 1:35 pm

Dear all,

Thanks for your replies. Sorry for the misunderstanding, it is L Pup (HD62623 - 3Pup). I had not understood the particular emission line shape, now it is a little bit clear.

Emmanuel
Emmanuel Jeffredo
 
Posts: 11
Joined: Sat Nov 09, 2019 5:35 pm
Location: Saint-Pierre Reunion Island


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