Spatially Resolved RGS Analysis of Kepler's Supernova Remnant

Abstract

The distribution and kinematics of the circumstellar medium (CSM) around a supernova remnant (SNR) tell us useful information about the explosion of its natal supernova (SN). Kepler's SNR, the remnant of SN1604, is widely regarded to be of Type Ia origin. Its shock is moving through a dense, asymmetric CSM. The presence of this dense gas suggests that its parent progenitor system consisted of a white dwarf and an asymptotic giant branch (AGB) star. In this paper, we analyze a new and long observation with the reflection grating spectrometers (RGS) on board the XMM-Newton satellite, spatially resolving the remnant emission in the cross-dispersion direction. We find that the CSM component is blue-shifted with velocities in the general range 0-500 km/s. We also derive information on the central bar structure and find that the northwest half is blue-shifted, while the southeast half is red-shifted. Our result is consistent with a picture proposed by previous studies, in which a "runaway" AGB star moved to the north-northwest and toward us in the line of sight, although it is acceptable for both single-degenerate and core-degenerate scenarios for the progenitor system.

19 pages, 5 figures, accepted for publication in ApJ

References in corpus (14)

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Cited by in corpus (11)

• Type Ia Supernova Explosions in Binary Systems: A Review
• The role of jets in exploding supernovae and in shaping their remnants
• Common envelope to explosion delay time distribution (CEEDTD) of type Ia supernovae
• A spatially resolved study of hard X-ray emission in Kepler's SNR: indications of different regimes of particle acceleration
• He abundance of Dense Circumstellar Clumps in the Cassiopeia A Supernova Remnant
• A Third Epoch Proper Motion Study of The Forward Shock in Kepler's Supernova Remnant
• Progenitor constraint with circumstellar material for the magnetar-hosting supernova remnant RCW 103
• Bayesian insights in Tycho supernova remnant : a detailed mapping of ejecta properties
• Comparing the three-dimensional morphological asymmetries in the ejecta of Kepler and Tycho in X-rays
• The double detonation of a double degenerate system, from Type Ia supernova explosion to its supernova remnant
• Unraveling the Effects of Dense Medium on a Near to Bohm-Limit Acceleration in Kepler's SNR