2004A&A...420..937V


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET09:46:20

2004A&A...420..937V - Astronomy and Astrophysics, volume 420, 937-944 (2004/6-4)

An evolutionary model for pulsar-driven supernova remnants. A hydrodynamical model.

VAN DER SWALUW E., DOWNES T.P. and KEEGAN R.

Abstract (from CDS):

We present a model of a pulsar wind nebula evolving inside its associated supernova remnant. The model uses a hydrodynamics code to simulate the evolution of this system when the pulsar has a high velocity. The simulation distinguishes four different stages of pulsar wind nebula evolution: the supersonic expansion stage, the reverse shock interaction stage, the subsonic expansion stage and ultimately the bow shock stage. The simulation bears out that, due to the high velocity of the pulsar, the position of the pulsar is off-centered with respect to its pulsar wind nebula, after the passage of the reverse shock. Subsequently the pulsar wind nebula expands subsonically until the event of the bow shock formation, when the motion of the pulsar becomes supersonic. The bow shock formation event occurs at roughly half the crossing time, when the pulsar is positioned at 0.677 times the radius of the supernova remnant blastwave, in complete agreement with analytical predictions. The crossing time is defined by the age of the supernova remnant when the pulsar overtakes the blastwave bounding the supernova remnant. The results of the model are applied to three supernova remnants: N157B, G327.1-1.1 and W44. We argue that the head of the pulsar wind nebula, containing the active pulsar, inside the first two systems is not bounded by a bow shock. However, in the case of W44 we argue for a scenario in which the pulsar wind nebula is bounded by a bow shock, due to the supersonic motion of the pulsar.

Abstract Copyright:

Journal keyword(s): pulsars: general - stars: supernova remnants - shocks waves - hydrodynamics

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 2060 SNR 05 37 51.4470067818 -69 10 23.957283532   9.69 9.59     ~ 327 2
2 SNR G327.1-01.1 SNR 15 54 32.3 -55 03 44           ~ 86 1
3 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 845 2
4 SNR G068.8+02.6 SNR 19 52 55 +32 54.2           ~ 331 1

    Equat.    Gal    SGal    Ecl

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2021.03.01-09:46:20

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