Three supernova remnants observed by BeppoSAX

Vink, Jacco

doi:10.1016/s0920-5632(98)00185-6

Nuclear Physics B - Proceedings Supplements

1999

DOI: 10.1016/s0920-5632(98)00185-6

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Three supernova remnants observed by BeppoSAX

Jacco Vink

Abstract: We present the results of three observations of shell-type supernova remnants observed by BeppoSAX. Two of the remnants (N132D and Cas A) are oxygen rich supernova remnants. They were observed during the PV phase. SN1006 was observed during A01. For SN1006 we present preliminary results on the abundance measurements based on the emission from the center of the remnant.

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2003

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Limits to the Cassiopeia A⁴⁴Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

Rothschild

Lingenfelter

2003

ApJ

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Two long observations of the Cas A supernova remnant were made by the Rossi X-Ray Timing Explorer in 1996 and 1997 to search for hard X-ray line emission at 67.9 and 78.4 keV from the decay of 44 Ti formed during the supernova event. Continuum flux was detected up to 100 keV, but the 44 Ti lines were not detected. The 90% confidence upper limit to the line flux is 3:6 Â 10 À5 photons cm À2 s À1 . This is consistent with the recent BeppoSAX detection and with the Compton Gamma Ray Observatory/Imaging Compton Telescope (CGRO/COMPTEL) detection of the companion transition line flux for 44 Sc decay. The mean BeppoSAX-COMPTEL flux indicates that 1:5 AE 0:3 Â 10 À4 M of 44 Ti was produced in the supernova explosion. On the basis of recent theoretical calculations and optical observations suggesting a WN Wolf-Rayet progenitor with an initial mass of !25 M , the observed 44 Ti yield implies that the Cas A supernova ejecta energy was $2 Â 10 51 ergs, and as a result a neutron star was formed, rather than a black hole. We suggest that Cas A is possibly in the early stages of the anomalous X-ray pulsar/soft gamma-ray repeater (AXP/SGR) scenario in which the pushback disk has yet to form, and when the disk does form, the accretion will increase the luminosity to that of present-day AXP/SGRs, and pulsed emission will commence.

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Limits to the Cassiopeia A⁴⁴Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

Rothschild

Lingenfelter

2003

ApJ

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Three supernova remnants observed by BeppoSAX

Cited by 1 publication

References 19 publications

Limits to the Cassiopeia A⁴⁴Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

Limits to the Cassiopeia A⁴⁴Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

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Three supernova remnants observed by BeppoSAX

Cited by 1 publication

References 19 publications

Limits to the Cassiopeia A44Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

Limits to the Cassiopeia A44Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

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Limits to the Cassiopeia A⁴⁴Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source

Limits to the Cassiopeia A⁴⁴Ti Line Flux and Constraints on the Ejecta Energy and the Compact Source