Is the expanding molecular cloud surrounding λ Orionis caused by a Supernova?

Details Is the expanding molecular cloud surrounding λ Orionis caused by a Supernova? Is the expanding molecular cloud surrounding λ Orionis caused by a Supernova?

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...309..892c&link_type=abstract

Astronomy and Astrophysics, v.309, p.892-894

Astronomy and Astrophysics

Astrophysics

12

Supernova: Remnants, Pulsars: Individual: Geminga, Stars: {Lambda} Ori, Ism: Clouds

Scientific paper

We investigate the possibility that the expanding ring of gas surrounding the O star λ Ori could be due to the explosion of a type II supernova some 300,000-370,000 years ago. Based upon the observed properties of the ring and a set of simple equations describing the radius and expansion velocity of a supernova remnant as a function of time, we find that the expanding ring could be the result of a supernova occurring in a flattened molecular cloud. This model could explain the peculiar motion of λ Ori relative to the ring of gas if λ Ori were the binary companion to the progenitor star of the supernova.

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