NDLI: X-ray heating of the ejecta of supernova 1987a

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X-ray heating of the ejecta of supernova 1987a

Content Provider	NASA Technical Reports Server (NTRS)
Author	Sonneborn, George McCray, Richard Kirshner, Robert Challis, Peter Larsson, Josefin Fransson Sr., Claes
Copyright Year	2012
Description	Analysis of Hubble Space Telescope Band R band images from 1994 to 2009 show that the optical luminosity of SN 1987A has transitioned from being powered by radioactive decay of Ti-44 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 analyze the structure and chemistry of the vanished star.
File Size	33900
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120003675
Archival Resource Key	ark:/13960/t8kd6wh1n
Language	English
Publisher Date	2012-01-08
Access Restriction	Open
Subject Keyword	Astronomy Ejecta X Rays Hubble Space Telescope Luminosity Titanium Isotopes Shock Wave Interaction Supernova 1987a Radioactive Decay Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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