Hello
These past week i observe a few hundred of B star tnaks to a automated script. I do a first visual scan of the raw image and find évident emission in Ha for 9 stars:
BD+60 133
BD+28 4177
BD+57 2581
BD+59 2675
BD+60 2523
BD+63 1964 ??? look strange...
BD+64 106
HD 237126
HR 8107
All these stars need rapid confirmation in High resolution.
Regards
Thierry
9 stars looks new Be, to be confirm in High resolution
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9 stars looks new Be, to be confirm in High resolution
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- _bd+64106_20140925_947_Thierry Lemoult.png (7.75 KiB) Viewed 11480 times
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- _hd237126_20140909_995_Thierry Lemoult.png (8.15 KiB) Viewed 11480 times
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- _bd+631964_20140910_918_Thierry Lemoult.png (9.74 KiB) Viewed 11480 times
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- _bd+602523_20140911_912_Thierry Lemoult.png (7.43 KiB) Viewed 11480 times
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- _bd+592675_20140910_909_Thierry Lemoult.png (8.87 KiB) Viewed 11480 times
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- _bd+572581_20140911_880_Thierry Lemoult.png (8.2 KiB) Viewed 11480 times
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- _bd+284177_20140914_851_Thierry Lemoult.png (6.02 KiB) Viewed 11480 times
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Thierry Lemoult. http://perso.crans.org/lemoult/
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Re: 9 stars looks new Be, to be confirm in High resolution
Thierry, a significant hall well done. I think BD+64 106 has been seen before as per my email but the others do not show as Be in the Catalogue of Stellar Spectral Classifications (Skiff, 2009-2014).
I doubt I will have any left to find if you proceed at this rate!
Regards Andrew
I doubt I will have any left to find if you proceed at this rate!
Regards Andrew
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Re: 9 stars looks new Be, to be confirm in High resolution
Impressionnant travail Thierry !
Peux-tu détailler ta méthode d'enregistrement des spectres en automatique ?
Quel script et logiciel utilises-tu et surtout comment fais-tu pour arriver à positionner automatiquement une étoile sur la fente du spectro ?
Merci des infos et encore bravo !
Peux-tu détailler ta méthode d'enregistrement des spectres en automatique ?
Quel script et logiciel utilises-tu et surtout comment fais-tu pour arriver à positionner automatiquement une étoile sur la fente du spectro ?
Merci des infos et encore bravo !
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
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Re: 9 stars looks new Be, to be confirm in High resolution
Many stars can look as Be. From my personnal data base and a long and patient bibliography research (at a time there was no Internet!), some example, nether entered in the "official" Be data base:
HD4881 (Simbad type: B9.5V):
HD5839 (Simbad type B9 (?))
HD191639 (Simbad B1V, noted Be in Simbad... but can be also a beta Cep star, ... )
...
I hope you have better luck. The role of Coralie Neiner is important for analysis and confirmation.
But already, an essential first step is accomplished: the detection of suspected cases (and compilation of
a public list for reseach and more observations). Perfect.
(PS: it's clear the aspect of BD+69 1969 spectrum seem very different of a A or B type star).
Christian
HD4881 (Simbad type: B9.5V):
HD5839 (Simbad type B9 (?))
HD191639 (Simbad B1V, noted Be in Simbad... but can be also a beta Cep star, ... )
...
I hope you have better luck. The role of Coralie Neiner is important for analysis and confirmation.
But already, an essential first step is accomplished: the detection of suspected cases (and compilation of
a public list for reseach and more observations). Perfect.
(PS: it's clear the aspect of BD+69 1969 spectrum seem very different of a A or B type star).
Christian
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Re: 9 stars looks new Be, to be confirm in High resolution
Super travail Thierry !
A la demande de Andrew, j'ai ouvert une sous-forum dédié à votre recherche afn de regrouper toutes les observations
http://www.spectro-aras.com/forum/viewforum.php?f=32
Bonne continuation
François
A la demande de Andrew, j'ai ouvert une sous-forum dédié à votre recherche afn de regrouper toutes les observations
http://www.spectro-aras.com/forum/viewforum.php?f=32
Bonne continuation
François
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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Re: 9 stars looks new Be, to be confirm in High resolution
High resolution Halpha spectrum of some of Thierry suspected Be stars. Not so easy with a resolution of R = 50000 (nearly 100 time the Thierry original survey resolution), a relatively small telescope (C11) and a fiber link to the telescope (VHIRES-MO). Thierry, your stars are not so bright
BD+28 4177 (evident double peak emission):
BD+60 133 (very similar to an edge on disk):
BD+60 2523 (most intense peak of the sequence):
BD+64 106 (V = 10.2 and relatively short exposure - nearly the limit magnitude of this setup (but bad seeing and some wind)):
HD237126 (most faintest Halpha emission of the sequence - sound like a Be stars..)
Christian
BD+28 4177 (evident double peak emission):
BD+60 133 (very similar to an edge on disk):
BD+60 2523 (most intense peak of the sequence):
BD+64 106 (V = 10.2 and relatively short exposure - nearly the limit magnitude of this setup (but bad seeing and some wind)):
HD237126 (most faintest Halpha emission of the sequence - sound like a Be stars..)
Christian
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Re: 9 stars looks new Be, to be confirm in High resolution
Many thanks Christian for these spectrum. Your high resolution spectrum are so impressive. Your setup work so well with emission star. I will continue the survey in low res, the setup work well, the script was lunch three day ago.. i hope some more new emission star finding. The average, is one finding per night.
Regards
Thierry
Regards
Thierry
Thierry Lemoult. http://perso.crans.org/lemoult/
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Re: 9 stars looks new Be, to be confirm in High resolution
BD+57 2581 emission confirmed at high resolution (short observation during gap in clouds so poor SNR)
Cheers
Robin
Cheers
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
http://www.threehillsobservatory.co.uk
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Re: 9 stars looks new Be, to be confirm in High resolution
Hi Thierry, I observed BD+59 2675 with Lhires III 2400 (R~15000) and can confirm an emission line "bottle" shaped.
Concerning requirements for Be stars I read in your page:
http://www.astrosurf.com/aras/be_candid ... idate.html
and the criterion: "3.High resolution spectra of Balmer lines does not show P Cygni or inverse P Cygni profiles", I wonder if such a characteristic is present in V594 Cas (in BeSS database) spectrum :
It seems a P-cygni but I'm not expert and I do not know if it's an "extreme" Be star case.
Congratulations for your fantastic work!
Paolo
Concerning requirements for Be stars I read in your page:
http://www.astrosurf.com/aras/be_candid ... idate.html
and the criterion: "3.High resolution spectra of Balmer lines does not show P Cygni or inverse P Cygni profiles", I wonder if such a characteristic is present in V594 Cas (in BeSS database) spectrum :
It seems a P-cygni but I'm not expert and I do not know if it's an "extreme" Be star case.
Congratulations for your fantastic work!
Paolo