Supernova Remnants: An Odyssey in Space after Stellar death

Supernova Remnants: An Odyssey in Space after Stellar death

Supernova Remnants: An Odyssey in Space after Stellar death


1st Abstract

Title (1st Abstract)

Thermal X-rays and shock speed measurement in RX J1713.7−3946

First Author

F. Acero


Laboratoire AIM, CEA-Saclay

Additional Authors

S. Katsuda, J. Ballet, R. Petre

Presentation options



1. Radiation studies from gamma-rays to radio in Galactic and Extragalactic SNRs

1st Abstract

Despite being one of the prototype of Galactic cosmic ray accelerator, important parameters such as age, shock speed, ambient medium density and progenitor properties are still poorly known for the SNR RX J1713.7−3946. In particular, determining the ambient density is crucial to understand the nature of the gamma-ray emission and constrain the fraction of kinetic energy transferred to hadrons accelerated at the shock front of the SNR.
For over a decade, thermal X-ray emission, which could constrain the ambient density, has been searched for in this synchrotron dominated SNR. Deep XMM-Newton and Suzaku observations have finally revealed this emission and it’s nature will be discussed (ejecta or shocked ISM). Another possibility to constrain the ambient density medium is through X-ray proper motion measurements. The South-East region of the SNR present the best example of clear and sharp X-ray filaments and the shock in this region is probably expanding in the low density carved by the strong winds of the progenitor. Using follow-up XMM observations of the South-East region and 13 years of leverage, we will present the first clear measurement of proper motion in RX J1713.7−3946 and the implication in terms of ambient density, shock speed, and age of the SNR.

2nd Abstract

Title (2nd abstract)

The intriguing double torus-jet PWN around PSR J0855-4644

First Author (2nd abstract)

Chandreyee Maitra

Affiliation (2nd abstract)

AIM/IFRU CEA Saclay, France

Additional Authors (2nd abstract)

Fabio Acero, Christo Venter

Presentation options (2nd abstract)


Session (2nd abstract)

3. Pulsar winds nebulae (including Crab flares)

2nd Abstract

PSR J0855-4644 is a nearby, fast spinning, and energetic radio pulsar spatially coincident with the rim of the supernova remnant RX J0852.0-4622 (aka Vela Jr). XMM Newton observations of the pulsar region have shown an arcmin scale extended emission, the pulsar wind nebula (PWN), around the X-ray counterpart of the pulsar. Here, we present results from the small scale structure of the nebula provided by a Chandra observation of this source. This observation has revealed an arc second scale compact PWN around the pulsar showing a possible double ‘torus+jet’ morphology. This makes it only the third source of its kind, and being an nearby object provides us with the golden opportunity to investigate the physics of equatorial and polar outflows in PWNe. Modeling the geometry of this source is also crucial to understand why no gamma-ray pulsations have been detected by the Fermi-LAT telescope for this high E_dot/d^2 pulsar. In order to constrain the pulsar spin inclination angle, we model the double torus morphology and then compare it with theoretical phase-plots to understand this radio loud, gamma-ray quiet system.