Origin of Sgr A East: Hypernova?

Details Origin of Sgr A East: Hypernova? Origin of Sgr A East: Hypernova?

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..362..158l&link_type=abstract

The Seventh Pacific Rim Conference on Stellar Astrophysics, ASP Conference Series, Vol. 362, Proceedings of the conference held

Astronomy and Astrophysics

Astrophysics

Scientific paper

We have observed H_2 ~ 1-0 ~ S(1)} (2.1218µ) and 2-1 ~ S(1)} (2.2477µ) emission line spectra from the interaction regions between Sgr A East and the surrounding molecular clouds in the central 10 pc of the Galaxy. From the shock velocities (≃ 100~ km s-1) of Sgr A East, estimated by comparing H_2 line profiles with those of NH_3, we derive an initial explosion energy of 0.2-4 × 1053 ergs. Such a high range energy excludes the hypothesis of a single typical supernova for the origin of Sgr A East. Instead, we suggest a collapsar or microquasar.

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