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The companion to the central mira star of the Protoplanetary Nebula OH 231.8+4.2

Show simple item record Sánchez Contreras, C. Gil de Paz, A. Sahai, R. 2008-06-13T21:16:13Z 2008-06-13T21:16:13Z 2004-11-20
dc.identifier.citation Astrophysical Journal, 616:519–524, 2004 November 20, en_US
dc.description.abstract We present deep optical long-slit spectra of the peculiar protoplanetary nebula (PPN) OH 231.8+4.2 obtained with the 6.5 m Baade Telescope at Las Campanas Observatory (Chile). In addition to the molecular absorption bands characteristic of the M9-10 III star inside OH 231.8+4.2 (QX Pup), we identify lines of the Balmer series in absorption, which do not form in the cool atmospheres of late M-type stars. We also confirm the presence of a blue continuum excess with an intensity that is a factor 30 larger than that expected for an M9-10 III star. Our results indicate the presence of a source hotter than QX Pup illuminating OH 231.8+4.2 that is likely a main-sequence star with spectral type A. We discuss how the formation and nebular evolution of OH 231.8+4.2 could have been affected by the presence of a binary system in its core. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher American Astronomical Society en_US
dc.subject binaries en_US
dc.subject circumstellar matters en_US
dc.subject mass loss en_US
dc.subject planetary nebulae en_US
dc.title The companion to the central mira star of the Protoplanetary Nebula OH 231.8+4.2 en_US
dc.type Article en_US

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