Post-AGB A-F supergiant stars

dc.contributor.author	Parthasarathy, M
dc.contributor.author	Reddy, B. E
dc.date.accessioned	2007-05-10T05:42:23Z
dc.date.available	2007-05-10T05:42:23Z
dc.date.issued	1993
dc.identifier.citation	BASI, Vol. 21, pp. 609-612	en
dc.identifier.uri	http://hdl.handle.net/2248/1566
dc.description.abstract	We have searched the IRAS Polar Stratospheric Clouds (PSC) for dust shells around A-F supergiant stars similar to the high galactic latitude A-F supergiants with circumstellar dust shells. We have found that HD 114855 (F5Ia), HD 158616 (F8I), SAO 173329 (F51), V718 Sco (A8III), HD 53300 (A0Ib), HD 331319 (F3Ib), SAO 40039 (A4Ia) to be IRAS sources with far infrared colors and flux distribution similar to those of planetary nebulae. These stars have detached cold dust shells. Temperatures, masses, radii and luminosities of the dust shells are derived. The dust shell characteristics suggest that these stars have suffered severe mass loss in the recent past during their asymptotic giant branch (AGB) stage of evolution. Their present position in the H-R diagram suggests that they are evolving towards left into the region of planetary nebulae	en
dc.format.extent	249273 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	Astronomical Society of India	en
dc.subject	Supergiants	en
dc.subject	Stellar evolution	en
dc.title	Post-AGB A-F supergiant stars	en
dc.type	Article	en