Alpha Arae
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alpha Arae is the second brightest star in the constellation Ara. Like other Be stars, Alpha Arae rotates quickly, rapidly enough in fact to be surrounded by a equatorial disk of material ejected from the star. In 2003 and 2005, Alpha Arae was observed by infrared interferometry, using the MIDI and AMBER instruments at the VLT Interferometer. The results, published in 2005 and 2007, appear to show that Alpha Arae has an equatorial rotational speed of about 470 km/s,…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alpha Arae is the second brightest star in the constellation Ara. Like other Be stars, Alpha Arae rotates quickly, rapidly enough in fact to be surrounded by a equatorial disk of material ejected from the star. In 2003 and 2005, Alpha Arae was observed by infrared interferometry, using the MIDI and AMBER instruments at the VLT Interferometer. The results, published in 2005 and 2007, appear to show that Alpha Arae has an equatorial rotational speed of about 470 km/s, that it is surrounded by a dense equatorial disk of material in Keplerian rotation, and that it is losing mass by a polar stellar wind with a terminal velocity of approximately 1,000 km/s. There is also some evidence that Alpha Arae is orbited by a companion at 0.7 AU.