Skip to main content Accessibility help
×
Home

Hard X-Rays and Gamma-Rays from SN 1987A

  • M. Itoh (a1), S. Kumagai (a2), T. Shigeyama (a2), K. Nomoto (a2) and J. Nishimura (a1)...

Extract

Gamma-rays originating from radioactive decays of 56Ni and 56Co and hard X-rays due to Compton degradation of γ-rays have been predicted to emerge when the supernova becomes sufficiently thin. The X-ray detections by Ginga (Dotani et al. 1988) and Kvant (Sunyaev et al. 1988) and more recent report of γ-ray detections by SMM (Matz et al. 1988) were much earlier than the theoretical predictions. (See Itoh et al. 1987 and references therein.)

These observations would give important constraints on the distribution of the heavy elements and 56Co in the ejecta. We adopted the hydrodynamical model 11E1Y6 (Nomoto et al. 1988) and carried out Monte Carlo simulation for photon transfer. A step-like distribution of 56Co was assumed where the mass fraction of 56Co in the layers at Mr ≤ 4.6 M , 4.6 − 6 M , 6 − 8 M , and 8 − 10 M are X Co = 0.0128, 0.0035, 0.0021, and 0.0011, respectively. Other heavy elements were distributed with mass fractions in proportion to 56Co.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Hard X-Rays and Gamma-Rays from SN 1987A
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Hard X-Rays and Gamma-Rays from SN 1987A
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Hard X-Rays and Gamma-Rays from SN 1987A
      Available formats
      ×

Copyright

References

Hide All
Dotani, T. et al.: 1987, Nature, 330, 230.
Itoh, M., Kumagai, S., Shigeyama, T., Nomoto, K., Nishimura, J.: 1987, Nature, 330, 233.
Matz, S.M., Share, G.H., Leising, M.D., Chupp, E.L., Vestrand, W.T., Purcell, W.R., Strickman, M.S., Reppin, C.: 1988, Nature, 331, 416.
Nomoto, K., Shigeyama, T., Hashimoto, M.: 1988, in IAU Colloquium 108, Atmospheric Diagnostics of Stellar Evolution, ed. Nomoto, K., Springer-Verlag, p. 319.
Sunyaev, R. et al.: 1987, Nature, 330, 227.
Wilson, R.B., Fishman, G., Meegan, C., Paciesas, W., Sandie, W., Chase, L., Nakano, G.: 1988, private communication.

Hard X-Rays and Gamma-Rays from SN 1987A

  • M. Itoh (a1), S. Kumagai (a2), T. Shigeyama (a2), K. Nomoto (a2) and J. Nishimura (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed