X-ray Heating Of The Ejecta Of Supernova 1987A

Details X-ray Heating Of The Ejecta Of Supernova 1987A X-ray Heating Of The Ejecta Of Supernova 1987A

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924225s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #242.25

Astronomy and Astrophysics

Astronomy

Scientific paper

Analysis of Hubble Space Telescope B and R band images from 1994 to 2009 show that the optical luminosity of SN 1987A has transitioned from being powered by radioactive decay of 44Ti to energy deposited by X-rays produced as the ejecta interacts with the surrounding material (Larsson et al 2011, Nature, 474, 484). The B and R band flux from the densest, central parts of the ejecta followed the expected exponential decline until 2001 (about day 5000) when the flux in these bands started increasing, more than doubling by the end of 2009. This increase is the result of heat deposited by X-rays from the shock interaction of the fast-moving outer ejecta with the inner circumstellar ring. In time, the X-rays will penetrate farther into the ejecta, enabling us to analyse the structure and chemistry of the vanished star.

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