SIMBAD references

2002ApJ...569..275M - Astrophys. J., 569, 275-279 (2002/April-2)

The X-ray source at the center of the Cassiopeia A supernova remnant.


Abstract (from CDS):

We present the first results of an XMM-Newton observation of the central X-ray source in the Cas A supernova remnant. The spectrum can be fitted equally well with an absorbed steep power law (αph∼3, NH∼1.5x1022 cm–2) or with a bremsstrahlung with temperature kT∼2.4 keV and NH∼1022 cm–2. A blackbody model (kTBB∼0.7 keV) gives a slightly worse fit and requires a column density NH∼5x1021 cm–2 and an emitting area with radius ∼0.3 km (for d=3.4 kpc). A search for pulsations for periods longer than 150 ms gave negative results. The 3 σ upper limits on the pulsed fraction are ∼13% for P>0.3 s and ∼7% for P>3 s. The overall properties of the central X-ray source in Cas A are difficult to explain in terms of a rapidly spinning neutron star with a canonical magnetic field of ∼1012 G, and are more similar to those of slowly rotating neutron stars such as the anomalous X-ray pulsars.

Abstract Copyright:

Journal keyword(s): Stars: Neutron - Stars: Supernovae: Individual: Name: Cassiopeia A - X-Rays: Stars

CDS comments: p.278 : G290.5+10.0 misprint for G296.5+10.0, G266.1-1.2 misprint for G266.2-1.2, fig. 3 : some RX and RXS not identified (incomplete format)

Simbad objects: 16

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