Skip to main content Accessibility help
×
Home

Late-Phase Observations of a Super-Chandrasekhar SN Ia

  • M. Yamanaka (a1), K. S. Kawabata (a1), K. Maeda (a2), M. Tanaka (a2), M. Yoshida (a1), T. Hattori (a3), K. Nomoto (a2), T. Komatsu (a4) and T. Okushima (a4)...

Abstract

A super-Chandrasekhar (SC) supernova (SN) has an extremely high luminosity and a slow decline rate of the light curve in the early-phase. We present late-phase observations of the SC SN 2009dc. We find that the optical luminosity a year after maximum is much fainter than that expected from its early luminosity. We attempt to fit the analytic light curve model to the observations using Arnett's rule. The model successfully explains the light curves until 120 days. This suggests that the extremely high luminosity originates from the 56Ni decay. We suggest that the late-phase decline would be caused by dust formation. The existence of strong carbon features in early-phase spectra would support this scenario. We also find a blend of [Ca ii] and [Ni ii] in its late-phase spectrum. This indicates that the calcium is distributed in the inner layer along with nickel and iron. We conclude that the mixing may occur in the inner parts of the ejecta.

    • 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.

      Late-Phase Observations of a Super-Chandrasekhar SN Ia
      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.

      Late-Phase Observations of a Super-Chandrasekhar SN Ia
      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.

      Late-Phase Observations of a Super-Chandrasekhar SN Ia
      Available formats
      ×

Copyright

References

Hide All
Arnett, W. D. 1982, ApJ, 253, 785
Kashikawa, N., et al. 2002, PASJ, 54, 819
Maeda, K., et al. 2009, ApJ, 690, 1745
Silverman, J. M., Ganeshalingam, M., Li, W., Filippenko, A. V., Miller, A. A., & Poznanski, D. 2011, MNRAS, 410, 585
Stanishev, V., et al. 2007, A&A, 469, 645
Tanaka, M., et al. 2010, ApJ, 714, 1209
Taubenberger, S., et al. 2011, MNRAS, 61
Yamanaka, M., et al. 2009, ApJ, 707, L118
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

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