HD 9878 in Cassiopée a possible Be star?

HD 9878 in Cassiopée a possible Be star?

Postby Gerard Martineau » Thu Nov 17, 2016 6:11 pm

Statut de HD 9878 [Be]?
Messagepar Gerard Martineau » Dim Nov 06, 2016 3:11 pm

HD 9878.gif
HD 9878.gif
HD 9878.gif (9.87 KiB) Viewed 4111 times

HD 9878.gif (9.87 Kio) Consulté 202 fois
hd 9878 Ha.gif
hd 9878 Ha.gif
hd 9878 Ha.gif (8.73 KiB) Viewed 4111 times

hd 9878 Ha.gif (8.73 Kio) Consulté 202 fois

Bonjour à tous,.
Ci-joint le profil de l’étoile HD 9878 dans Cassiopée, lequel présente une très faible émission au creux de la raie H alpha.
Ses caractéristiques sont: m= 6.7; sp=B7 V; B-V=0.016; H-K= 0.032;
Cette étoile aurait besoin d’une confirmation extérieure en haute résolution (critères 3 et 4 d’Andrew Smith) pour se présenter au statut de candidate Be ou de Be déclassée.
Merci à l’avance.
Hi all,
Attached the profile of the star HD 9878 in Cassiopee which presents a very weak emission in the hollow of the line H alpha. Its caracteristics are: m= 6.7; sp= B7 V; B-V=0.016; H-K=0.032.
This star would need an outside confirmation in high resolution (criteria 3 and 4 of Andrew Smith) to appear at candidate’s status Be, or of relegated Be.
Thanks to the advance.
Yolande Buchet
Gérard Martineau
Gerard Martineau

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Re: Statut de HD 9878 [Be]?
Messagepar Paolo Berardi » Jeu Nov 10, 2016 11:01 pm

Gerard, Yolande, very interesting finding! Not easy with a low resolution profile.
I just observe it (was cloudy before) with Lhires III 1200 (R~6000) and confirm an emission double peaked component.

hd9878_ 20161110_814_PB.png
hd9878_ 20161110_814_PB.png (26.02 KiB) Viewed 4111 times

Vizier results for the star (no emission indication):
HD9878_vizier.jpg (136.8 KiB) Viewed 4111 times

I think we should send our data to Thierry Lemoult for adding to the possible-Be database (it seems to me that HD9878 is not included) and continuing to monitor the star for any changes.


Re: Statut de HD 9878 [Be]?
Messagepar Thierry Lemoult » Dim Nov 13, 2016 9:23 pm

Hello Thanks for these spectrum. A congratulation to Yolande and Gérard.
I will integrate these spectrum soon in the ARAS dedicated page here http://www.astrosurf.com/aras/be_candid ... idate.html


Thierry Lemoult
Thierry Lemoult. http://perso.crans.org/lemoult/
Thierry Lemoult

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Re: Statut de HD 9878 [Be]?
Messagepar Andrew Smith » Mar Nov 15, 2016 10:55 am

Yes, congratulation to Yolande and Gérard a good spot at low resolution.

Incidentally does anyone know if any professional studying Be stars have taken any interest in our discoveries?

There must be more to find as the number we have found doesnot balance the statistical short fall pointed out by Francois.

Regards Andrew
Andrew Smith

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Re: Statut de HD 9878 [Be]?
Messagepar umberto sollecchia » Mar Nov 15, 2016 8:53 pm

Yoland et Gérard, félicitations à vous pour votre observation fructueuse et aussi pour votre persévérance.
umberto sollecchia

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Re: Statut de HD 9878 [Be]?
Messagepar Christian Buil » Jeu Nov 17, 2016 12:31 am

Excellente détection !

Christian Buil

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Gerard Martineau
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