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Title:
Photometric Evolution of SNe Ib/c 2004ao, 2004gk, and 2006gi
Authors:
Elmhamdi, Abouazza; Tsvetkov, Dmitry; Danziger, I. John; Kordi, Ayman
Affiliation:
AA(Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia), AB(Sternberg Astronomical Institute, University Ave. 13, 119992 Moscow, Russia), AC(INAF, Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, 34131 Trieste, Italy ; Department of Astronomy, University of Trieste, Via G.B. Tiepolo 11, 34131 Trieste, Italy), AD(Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia)
Publication:
The Astrophysical Journal, Volume 731, Issue 2, article id. 129, 10 pp. (2011). (ApJ Homepage)
Publication Date:
04/2011
Origin:
IOP
Astronomy Keywords:
supernovae: general, supernovae: individual: SN 2004ao SN 2004gk SN 2006gi, techniques: photometric
DOI:
10.1088/0004-637X/731/2/129
Bibliographic Code:
2011ApJ...731..129E

Abstract

Photometric observations of three core collapse supernovae (SNe 2004ao, 2004gk, and 2006gi), covering about 200 days of evolution, are presented and analyzed. The photometric behavior of the three objects is consistent with their membership in the envelope-stripped Type Ib/c class. Pseudobolometric light curves are constructed. The corresponding measured e-folding times are found to be faster compared to the 56Co decay (i.e., 111.3 days), suggesting that a proportion of γ-rays increasing with time have escaped without thermalization, owing to the low-mass nature of the ejecta. SN 2006gi has almost identical post-maximum decline phase luminosities as SN 1999ex and found to be similar to both SNe 1999dn and 1999ex in terms of the quasi-bolometric shape, placing it among the fast decliner Ib objects. SN 2004ao appears to fit within the slow decliner Ib SNe. SNe 2004ao and 2004gk display almost identical luminosities in the [50-100] day time interval, similar to SN 1993J. A preliminary simplified γ-ray deposition model is described and applied to the computed pseudobolometric light curves, allowing one to find a range in the ejecta and 56Ni masses. The optical and quasi-bolometric light curves and the B - V color evolution of SN 2004gk are found to show a sudden drop after day 150. Correlating this fact to dust formation is premature and requires further observational evidence.
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