The wind-collision region of HD 93129A from LBA observations

Details The wind-collision region of HD 93129A from LBA observations The wind-collision region of HD 93129A from LBA observations

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop..829b&link_type=abstract

ATNF proposal V191, Semester: April, 2007

Computer Science

Stellar, Lba

Scientific paper

The O2 If* star HD 93129A, the brightest member of the Tr 14 cluster in Carina, has recently been observed as a strong non-thermal radio emitter (Benaglia & Koribalski 2005, C678), with a 1.4 GHz flux of ~10 mJy. Also recently, Nelan et al. (2004) using FGS-HST data, have demonstrated that this star has an O-star companion 55 mas distant (140 AU at 2.5 kpc), with a similar spectral type to HD 93129A. This relatively close companion opens the strong possibility of a WCR origin for the non-thermal radio emission. We propose to use the LBA to attempt to resolve the source of the non-thermal emission in HD 93129A. If the non-thermal emission region displays a curved morphology similar to that observed in WR140, this would support a WCR interpretation.

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