Gallagher, JS;
Sugerman, BEK;
Clayton, GC;
Andrews, JE;
Clem, J;
Barlow, MJ;
Ercolano, B;
... Meixner, M; + view all
(2012)
OPTICAL AND INFRARED ANALYSIS OF TYPE II SN 2006bc.
Astrophysical Journal
, 753
(2)
, Article 109. 10.1088/0004-637X/753/2/109.
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Abstract
We present nebular phase optical imaging and spectroscopy and near/mid-IR imaging of the Type II SN 2006bc. Observations reveal the central wavelength of the symmetric Hα line profile to be redshifted with respect to the host galaxy Hα emission by day 325. Such a phenomenon has been argued to result from an asymmetric explosion in the iron-peak elements resulting in a larger mass of 56Ni and higher excitation of hydrogen on the far side of the supernova (SN) explosion. We also observe a gradual blueshifting of this Hα peak which is indicative of dust formation in the ejecta. Although showing a normal peak brightness, V ~ –17.2, for a core-collapse SN, 2006bc fades by ~6 mag during the first 400 days suggesting either a relatively low 56Ni yield, an increase in extinction due to new dust, or both. A short-duration flattening of the light curve is observed from day 416 to day 541 suggesting an optical light echo. Based on the narrow time window of this echo, we discuss implications on the location and geometry of the reflecting interstellar medium. With our radiative transfer models, we find an upper limit of 2 × 10–3 M ☉ of dust around SN 2006bc. In the event that all of this dust were formed during the SN explosion, this quantity of dust is still several orders of magnitude lower than that needed to explain the large quantities of dust observed in the early univers
| Type: | Article |
|---|---|
| Title: | OPTICAL AND INFRARED ANALYSIS OF TYPE II SN 2006bc |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0004-637X/753/2/109 |
| Publisher version: | https://doi.org/10.1088/0004-637X/753/2/109 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10095229 |
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