spectro-aras.com

Bonjour,je informe que le H-alpha de cette étoile, de l'absorption est devenue émission.
Je joins une comparaison.Quelqu'un peut confirmer?
Cordialement Umberto

This is not an ideal setup for a star so faint - but I had the time and did not want to change the configuration - LHiRes 1800 - 23u - 5400 seconds. Unless I got the wrong star, it appears there is no emission.

Mike Potter
Beverly Hills Observatory

Merci beaucoup Mike pour votre observation.
Dès que je peux, encore observer cette étoile
Cordialement Umberto

Mike Salut, merci pour votre coopération. Je regardai de nouveau l'étoile.
Confermo H-alpha absorption.
Il y a eu un échange de fichiers dans le processus de réduction de données.
Placez la comparaison exacte.
Cordialemente Umberto

Hi Umberto, Mike,

there is a faint emission component in the large photospheric absorption also in my spectrum of 6 december (Lhires III 1200), a feature similar to what we can see on the recent Mike's profile. No hint of emission component is visible in previous mid-res spectra on BeSS. This could indicate that an activity phase has began. So, the Umberto early reporting, even if not appropriate, was useful anyway!



Paolo

Hi Umberto:

Ha! In fact, I had noticed that possible emission feature but was uncertain due to the somewhat ratty S/N, so the following night I went back to the star and tried another - ironically enough exposing almost the exact same time as yours. Indeed the feature is real.

Mike