Nonthermal X-Ray Emission from CTA 1

Details Nonthermal X-Ray Emission from CTA 1 Nonthermal X-Ray Emission from CTA 1

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...485..221s&link_type=abstract

Astrophysical Journal v.485, p.221

Astronomy and Astrophysics

Astronomy

41

Ism: Individual Alphanumeric: Cta 1, Ism: Supernova Remnants, X-Rays: Ism

Scientific paper

CTA 1 is a center-filled supernova remnant (SNR) whose morphology and spectrum indicate the presence of a central pulsar, a synchrotron nebula, and a thermal component associated with the expansion of the blast wave into the interstellar medium. The centrally bright emission surrounds the position of a faint point source of X-rays observed with the ROSAT PSPC. Here we report on ASCA observations that confirm the nonthermal nature of the diffuse emission from the central regions of the remnant. We also present evidence for weak thermal emission that appears to increase in strength toward the outer boundary of the SNR. Thus, CTA 1 appears to be an X-ray composite remnant. Both the aftermath of the explosive supernova event and the energetic compact core are observable.

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