FF cam

Our FF Cam paper for the Hvar conference proceedings was finally reviewed a few days ago. It took several referees to get this done. The observational campaign is still active until the end of April Nôtre papier sur FF cam a été finalement accepté il y a quelques jours. Il a fallut plusieurs correcteurs, avec des correction mineures. Une versin ArXiv est en ligne. http://arxiv.org/pdf/1305.1393   La campagne d'observation est toujours active jusqu'à la fin Avril.

Anatoly Miroshnichenko demande une nouvelle campagne d'observation de cette étoile qui a aboutit en 2012 à une première publication annoçant la nature binaire semi détachée de cette étoile. Le but de cette seconde campagne est de décrire l'échange de matière en fonction de la période orbitale. En effet FF cam est le siège de régulier outburst et est aussi une source X intense. La modélisation de cette étoile peut conduire à une meilleure compréhension de l'évolution des couples sérrés parmis les étoiles massives. Des spectres en... [Lire la suite]

These days at HVAR 2012 here is the poster who summarize spectroscopic observations of this new founded binary. Any comments are welcome ! Poster_FF_Cam_Hvar_2012

Anatoly Miroshnichenko and Stephen Danford, from University of North Carolina in Greensboro have begun to analyze the large collection of data on FF cam, available in Bess database. "Dear colleagues,Let me congratulate you on a discovery of binarity of FFCam. Thierry'sinitial suggestion from a dynamic spectrum is confirmed bymeasurements of the radial velocity of the Ca I 6102.72 A line thatbelong to the cool component of the system. The orbital period is7.785 days. I have only measured one line. Its equivalent width isalmost... [Lire la suite]

FF cam is the weirdest thing i had never observed. Daily spectras are differents, intensities variation, shape, double or single peak, all configurations of the h alpha line for a Be star are possible. 4 differents observers are following this challenging star. Three echelle spectrographs (Eshell) and one long slit H alpha centered spectrograph (LhiresIII) with telescopes from 0.28m to 0.80m. 3 in Europe and 1 in US. Summary of the H alpha profiles: http://www.astrosurf.com/garrel/webFFcam_March19/Vspec_objet.html And some plots... [Lire la suite]

I've sent a request to Alain Klotz, TAROT and some observers in France for a photmetry support of FF cam. I need a B V measure in Jonhson-Cousin system. Message en Français pour un support photométrique sur FF cam Il s'avère d'aprés le suivis spectrométrique que cette étoile n'est pas une Be classique mais présente une variabilité spectrale hors du commun. Pas d'exemples connus à ce niveau de variabilité, profil et intensité. On échantillonne actuellement la période mais aprés un mois de mesures, avec un spectre échelle... [Lire la suite]

I've started a spectral monitoring of one my favorite star, FF cam. I discovered this star in 2009 by a routine survey of Be stars. Considering the Bess program, this star was observed only once par year before. I was surprised in 2009 in two consecutives nights, while redoing spectra due to bad SNR, to see how much the h alpha profile has changed. I did some others spectra in 2009 showing a great activities in H alpha and let it down for a while. At this time i was using a LhiresIII... [Lire la suite]

This new highly variable Be star seems to be very strange. Each six differents spectrums taken between April 25th and June 6th are different ! So fast and intense variation from a Be star are not common. Sheliak is an example, perhaps unique with FF cam.  "6 spectres differents du 25 avril au 6 juin ! Les variations sont rapides et intenses, en profil et en largeur équivalente. Rien de commun avec la majorité des Be. Elle partage cette activité avec Sheliak, un système complexe aux variations similaires."  A period, if... [Lire la suite]

Another Be star, late type, B9 http://arasbeam.free.fr/spip.php?page=beam_spectra&etoile=1964 http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=hd+60062&submit=SIMBAD+search There is a lack of spectra concerning this star with a suspicion of fast variation in Ha line. My three last observations showed three differents Ha spectra in 8 days. Two of them are of good snr only one is suspicious. What may cause this variation ? What is the period ? There is a needing for more spectrum coverage. Etoile de magV 7.9 montrant une... [Lire la suite]