Discovery of near-infrared hydrogen line emission in the peculiar F8 hypergiant IRC +10420

Details Discovery of near-infrared hydrogen line emission in the peculiar F8 hypergiant IRC +10420 Discovery of near-infrared hydrogen line emission in the peculiar F8 hypergiant IRC +10420

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281l..33o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 1, p. L33-L36

Astronomy and Astrophysics

Astronomy

28

Emission Spectra, Hydrogen, Infrared Astronomy, Line Spectra, Peculiar Stars, Supergiant Stars, Infrared Spectroscopy, Photosphere, Red Shift, Stellar Envelopes

Scientific paper

High resolution infrared spectroscopy of IRC +10420 has revealed remarkable profiles of several hydrogen recombination lines, with emission detected for the first time in these lines. Br gamma, Pf gamma and Br alpha have emission peaks blue-shifted with respect to the photosphere, Br12 shows an emission core in the photospheric absorption line. In contrast, the H alpha line profile is double peaked. The line emission is interpreted as originating from a bipolar outflow that probably started as recent as ten years ago.

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