Spectre SAO 101067 étoile classe B5e (Luc Caron)

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Spectre SAO 101067 étoile classe B5e

Link: https://groupecoamnd.wixsite.com/website

Spectre SAO 101067 étoile classe B5e

Link: https://groupecoamnd.wixsite.com/website

J'ai pointé une étoile Be (SAO 101067) parmi d'autres mais pour celle-ci, la raie d'émission était bien apparente. Il semble y avoir un profil P-Cygnus ce qui nous permet de calculer la vitesse d'expansion des gaz autour de l'étoile (si la bande d'absorption est du côté bleu du pic d'émission) ou la vitesse de contraction ( si le pic d'absorption est du côté rouge de la raie d'émission (P-Cygnus inversé)). Dans ce cas, si on mesure la différence entre la distance du pic d'émission et de la raie d'absorption je mesure 8 A donc, avec la formule de calcul de l'effet Doppler, j'obtiens une vitesse d'expansion de 365 Km/s. Cette étoile est de magnitude 8,7 ce qui nécessite au moins 90 sec de pose pour obtenir un spectre exploitable avec L'Alpy 600.

I pointed to a Be star (SAO 101067) among others but for this one, the emission line was quite apparent. There appears to be a P-Cygnus profile which allows us to calculate the rate of gas expansion around the star (if the absorption band is on the blue side of the emission peak) or the rate of contraction ( if the absorption peak is on the red side of the emission line (inverted P-Cygnus)). In this case, if we measure the difference between the distance of the emission peak and the absorption line, I measure 8 A so, with the formula for calculating the Doppler effect, I obtain an expansion speed of 365 km/s. This star is of magnitude 8.7 which requires at least 90 seconds of exposure to obtain a usable spectrum with the Alpy 600.

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Spectre SAO 101067 étoile classe B5e

Spectre SAO 101067 étoile classe B5e

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