Search for aluminium monoxide in the winds of oxygen-rich AGB stars ⋆⋆⋆

Author： De Beck E.   Decin L.   Ramstedt S.   Olofsson H.   Menten K. M.   Patel N. A.   Vlemmings W. H. T.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|598|issue|A53-A53

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.598, Iss.issue, 2017-01, pp. : A53-A53

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Abstract

Context. Aluminium monoxide (AlO) is likely efficiently depleted from the gas around oxygen-rich evolved stars to form alumina (Al2O3) clusters and dust seeds. The presence of AlO gas in the extended atmospheres of evolved stars has been derived from optical spectroscopy. More recently, AlO gas was also detected at long wavelengths around the supergiant VY CMa and the oxygen-rich asymptotic giant branch star o Cet (Mira A). The central role aluminium might play in dust formation and wind driving, in combination with these first detections of AlO at long wavelengths, shows the need for a wider search for this molecule in the winds of evolved stars.

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