Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...250..171a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 250, no. 1, Oct. 1991, p. 171-178. Research supported by Max-Planck-Institut f
Astronomy and Astrophysics
Astrophysics
22
H Lines, Interstellar Matter, Wolf-Rayet Stars, H Ii Regions, Shell Stars, Supernova Remnants
Scientific paper
The results of an observational study of the interstellar material in the direction of the Wolf-Rayet star WR 125 are presented. The strong Lyman continuum flux of the star has ionized the surrounding neutral hydrogen within 3 pc. An infrared source has been detected by the IRAS Satellite. IC 14-36 itself is embedded within a 7 pc thick wall of a larger H I shell-like structure, which has an outer radius of about 30 pc, and a total mass of 5400 solar masses. To explain the large scale H I distribution, it is suggested that WR 125 and the progenitor of the pulsar P1919 + 20 were a binary system in the past. Within this hypothesis the evolution of the primary star of the binary has created the large H I shell structure. The effects of WR 125 upon the surrounding interstellar material are seen on much smaller scales. These observations reveal the neutral matter distribution prevailing around a star progenitor of a galactic supernova explosion of type Ib.
Arnal Marcelo E.
Mirabel Felix I.
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