| Name: | Firoza Sutaria |
| Affiliation: | Indian Institute of Astrophysics, Bangalore, India. |
| Conference ID : | ASI2023_479 |
| Title : | A soft x-ray survey of the Cygnus loop with Astrosat. |
| Authors : | Firoza Sutaria (IIA, Bangalore)
Abhijeet Patil (RRI, Bangalore),
K. P. Singh (IISER Mohalli),
et al. |
| Mode of Presentation: | Oral |
| Abstract Category : | Stars, ISM and Galaxy |
| Abstract : | We present here a comprehensive x-ray and UV study of the southern, "break-away" region of the Cygnus supernova Remnant (SNR), which has been extensively mapped by Astrosat. The 0.3-10 keV x-ray spectrum is best fit by multi-temperature models of a shocked plasma, with the 0.5-0.7 keV band dominated by charge exchange (CX) reactions. The observations further confirm that the x-ray emission is limb-brightened, although the effect varies across this breakaway region. The CX contribution is indicative of a highly ionized, shocked, ejecta interacting with a cold interstellar medium. Overall, our observations are consistent with a model wherein the supernova shock has only recently started interacting with the walls of a ISM cavity carved out by a massive, possibly late -O or early -B type progenitor star. |
