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Mise à jour de la période d’observation pour plusieurs étoiles
vendredi 29 août 2008 par Francois Cochard
Olivier Thizy a préparé une liste d’étoile connues, pour lesquelles, il suggère de raccourcir la période d’observation (basée sur la présentations de Anatoly Miroshnichenko à Heidelberg, en mai 2008). J’ai intégré ces modifications dans la base ArasBaAm. Voici son message :
delta Sco [7 days] : continuous monitoring is key, specially as it approached periastron (Feb-May 2011) ; seem its disk recently evolved toward a ring... very interesting star to follow.
gamma Cas [180 days] is still interesting to get spectra from time to time ; EW is evolving
48 Lib [90 days] : very interesting, V/R ratio is growing since few years ; to monitor
bet CMi [60 days] : late Be star, symetrical V/R but radial velocity to monitor. 700 days period ? Need more data there to constraint a period...
phi Per [90 days] : EW changed, down from 48 to now around 36-38. Bright Be binary candidates to monitor ?
66 Oph [180 days] : double peak spectrum, more southern but interesting to look at. Peak separation changed between the 1990’s and now. Is disk dissipating ?
omi Cas [180 days] : no emission lines in 1970’s ; Intensity around 4 in 1990’s and now around 6. Is the emission single-peak or triple ? Concentration of material in a Roche lob with presence of a companion ? EW is now reaching 40A (was 20 in the 1990’s !).
pi Aqr [60 days] : single peak in 1982, double peak after, then in 1996 absorption line with a single line swinging with a period of 84 days. It is worth to continuous monitor this star now.
ups Sgr [90 days] : was the subject of study of a pro ; interesting Be star spectrum merged with a later type star, lot of absorption lines in the spectrum.
EW Lac : [90 days] bright Be binary candidates to monitor (EW : 46
V777 Cas [90 days] : bright Be binary candidates to monitor (EW : 20-45)
V695 Mon [90 days] : bright Be binary candidates to monitor (EW : 45)
HD206773 [90 days] : bright Be binary candidates to monitor (EW : 0-43)
105 Tau [90 days] : bright Be binary candidates to monitor (EW : 42)
HD208682 [90 days] : bright Be binary candidates to monitor (EW : 41)
HD202904 [90 days] : bright Be binary candidates to monitor
DX Eri [90 days] : bright Be binary candidates to monitor
nu Gem [90 days] : bright Be binary candidates to monitor
François