SN 2012cg: EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION

G. H. Marion; Peter J. Brown; Jozsef Vinkó; Jeffrey M. Silverman; David J. Sand; Peter Challis; Robert P. Kirshner; J. Craig Wheeler; Perry Berlind; Warren R. Brown; Michael L. Calkins; Yssavo Camacho; Govinda Dhungana; Ryan J. Foley; Andrew S. Friedman; Melissa L. Graham; D. Andrew Howell; Eric Y. Hsiao; Jonathan M. Irwin; Saurabh W. Jha; Robert Kehoe; Lucas M. Macri; Keiichi Maeda; Kaisey Mandel; Curtis McCully; Viraj Pandya; Kenneth J. Rines; Steven Wilhelmy; Weikang Zheng

doi:10.3847/0004-637X/820/2/92

SN 2012cg: EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION

G. H. Marion
, Peter J. Brown
, Jozsef Vinkó
, Jeffrey M. Silverman
, David J. Sand
, Peter Challis
, Robert P. Kirshner
, J. Craig Wheeler
, Perry Berlind
, Warren R. Brown
, Michael L. Calkins
, Yssavo Camacho
, Govinda Dhungana
, Ryan J. Foley
, Andrew S. Friedman
, Melissa L. Graham
, D. Andrew Howell
, Eric Y. Hsiao
, Jonathan M. Irwin
, Saurabh W. Jha

Robert Kehoe, Lucas M. Macri, Keiichi Maeda, Kaisey Mandel, Curtis McCully, Viraj Pandya, Kenneth J. Rines, Steven Wilhelmy, Weikang Zheng

Research output: Contribution to journal › Article › peer-review

140 Scopus citations

Abstract

We report evidence for excess blue light from the Type Ia supernova (Sn Ia) SN 2012cg at 15 and 16 days before maximum B-band brightness. The emission is consistent with predictions for the impact of the supernova on a non-degenerate binary companion. This is the first evidence for emission from a companion to a normal SN Ia. Sixteen days before maximum light, the color of SN 2012cg is 0.2 mag bluer than for other normal SN Ia. At later times, this supernova has a typical SN Ia light curve, with extinction-corrected mag and . Our data set is extensive, with photometry in seven filters from five independent sources. Early spectra also show the effects of blue light, and high-velocity features are observed at early times. Near maximum, the spectra are normal with a silicon velocity v_Si = -10,500 km s^-1. Comparing the early data with models by Kasen favors a main-sequence companion of about six solar masses. It is possible that many other SN Ia have main-sequence companions that have eluded detection because the emission from the impact is fleeting and faint.

Original language	English (US)
Article number	92
Journal	Astrophysical Journal
Volume	820
Issue number	2
DOIs	https://doi.org/10.3847/0004-637X/820/2/92
State	Published - Apr 1 2016
Externally published	Yes

Keywords

supernovae: general
supernovae: individual (2012cg)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/0004-637X/820/2/92

Cite this

Marion, G. H., Brown, P. J., Vinkó, J., Silverman, J. M., Sand, D. J., Challis, P., Kirshner, R. P., Wheeler, J. C., Berlind, P., Brown, W. R., Calkins, M. L., Camacho, Y., Dhungana, G., Foley, R. J., Friedman, A. S., Graham, M. L., Howell, D. A., Hsiao, E. Y., Irwin, J. M., ... Zheng, W. (2016). SN 2012cg: EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION. Astrophysical Journal, 820(2), Article 92. https://doi.org/10.3847/0004-637X/820/2/92

Marion, GH, Brown, PJ, Vinkó, J, Silverman, JM, Sand, DJ, Challis, P, Kirshner, RP, Wheeler, JC, Berlind, P, Brown, WR, Calkins, ML, Camacho, Y, Dhungana, G, Foley, RJ, Friedman, AS, Graham, ML, Howell, DA, Hsiao, EY, Irwin, JM, Jha, SW, Kehoe, R, Macri, LM, Maeda, K, Mandel, K, McCully, C, Pandya, V, Rines, KJ, Wilhelmy, S & Zheng, W 2016, 'SN 2012cg: EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION', Astrophysical Journal, vol. 820, no. 2, 92. https://doi.org/10.3847/0004-637X/820/2/92

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title = "SN 2012cg: EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION",

abstract = "We report evidence for excess blue light from the Type Ia supernova (Sn Ia) SN 2012cg at 15 and 16 days before maximum B-band brightness. The emission is consistent with predictions for the impact of the supernova on a non-degenerate binary companion. This is the first evidence for emission from a companion to a normal SN Ia. Sixteen days before maximum light, the color of SN 2012cg is 0.2 mag bluer than for other normal SN Ia. At later times, this supernova has a typical SN Ia light curve, with extinction-corrected mag and . Our data set is extensive, with photometry in seven filters from five independent sources. Early spectra also show the effects of blue light, and high-velocity features are observed at early times. Near maximum, the spectra are normal with a silicon velocity vSi = -10,500 km s-1. Comparing the early data with models by Kasen favors a main-sequence companion of about six solar masses. It is possible that many other SN Ia have main-sequence companions that have eluded detection because the emission from the impact is fleeting and faint.",

keywords = "supernovae: general, supernovae: individual (2012cg)",

author = "Marion, \{G. H.\} and Brown, \{Peter J.\} and Jozsef Vink{\'o} and Silverman, \{Jeffrey M.\} and Sand, \{David J.\} and Peter Challis and Kirshner, \{Robert P.\} and Wheeler, \{J. Craig\} and Perry Berlind and Brown, \{Warren R.\} and Calkins, \{Michael L.\} and Yssavo Camacho and Govinda Dhungana and Foley, \{Ryan J.\} and Friedman, \{Andrew S.\} and Graham, \{Melissa L.\} and Howell, \{D. Andrew\} and Hsiao, \{Eric Y.\} and Irwin, \{Jonathan M.\} and Jha, \{Saurabh W.\} and Robert Kehoe and Macri, \{Lucas M.\} and Keiichi Maeda and Kaisey Mandel and Curtis McCully and Viraj Pandya and Rines, \{Kenneth J.\} and Steven Wilhelmy and Weikang Zheng",

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T2 - EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION

AU - Marion, G. H.

AU - Brown, Peter J.

AU - Vinkó, Jozsef

AU - Silverman, Jeffrey M.

AU - Sand, David J.

AU - Challis, Peter

AU - Kirshner, Robert P.

AU - Wheeler, J. Craig

AU - Berlind, Perry

AU - Brown, Warren R.

AU - Calkins, Michael L.

AU - Camacho, Yssavo

AU - Dhungana, Govinda

AU - Foley, Ryan J.

AU - Friedman, Andrew S.

AU - Graham, Melissa L.

AU - Howell, D. Andrew

AU - Hsiao, Eric Y.

AU - Irwin, Jonathan M.

AU - Jha, Saurabh W.

AU - Kehoe, Robert

AU - Macri, Lucas M.

AU - Maeda, Keiichi

AU - Mandel, Kaisey

AU - McCully, Curtis

AU - Pandya, Viraj

AU - Rines, Kenneth J.

AU - Wilhelmy, Steven

AU - Zheng, Weikang

PY - 2016/4/1

Y1 - 2016/4/1

N2 - We report evidence for excess blue light from the Type Ia supernova (Sn Ia) SN 2012cg at 15 and 16 days before maximum B-band brightness. The emission is consistent with predictions for the impact of the supernova on a non-degenerate binary companion. This is the first evidence for emission from a companion to a normal SN Ia. Sixteen days before maximum light, the color of SN 2012cg is 0.2 mag bluer than for other normal SN Ia. At later times, this supernova has a typical SN Ia light curve, with extinction-corrected mag and . Our data set is extensive, with photometry in seven filters from five independent sources. Early spectra also show the effects of blue light, and high-velocity features are observed at early times. Near maximum, the spectra are normal with a silicon velocity vSi = -10,500 km s-1. Comparing the early data with models by Kasen favors a main-sequence companion of about six solar masses. It is possible that many other SN Ia have main-sequence companions that have eluded detection because the emission from the impact is fleeting and faint.

AB - We report evidence for excess blue light from the Type Ia supernova (Sn Ia) SN 2012cg at 15 and 16 days before maximum B-band brightness. The emission is consistent with predictions for the impact of the supernova on a non-degenerate binary companion. This is the first evidence for emission from a companion to a normal SN Ia. Sixteen days before maximum light, the color of SN 2012cg is 0.2 mag bluer than for other normal SN Ia. At later times, this supernova has a typical SN Ia light curve, with extinction-corrected mag and . Our data set is extensive, with photometry in seven filters from five independent sources. Early spectra also show the effects of blue light, and high-velocity features are observed at early times. Near maximum, the spectra are normal with a silicon velocity vSi = -10,500 km s-1. Comparing the early data with models by Kasen favors a main-sequence companion of about six solar masses. It is possible that many other SN Ia have main-sequence companions that have eluded detection because the emission from the impact is fleeting and faint.

KW - supernovae: general

KW - supernovae: individual (2012cg)

UR - https://www.scopus.com/pages/publications/84964061237

UR - https://www.scopus.com/pages/publications/84964061237#tab=citedBy

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DO - 10.3847/0004-637X/820/2/92

M3 - Article

AN - SCOPUS:84964061237

SN - 0004-637X

VL - 820

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 92

ER -

SN 2012cg: EVIDENCE for INTERACTION between A NORMAL SN Ia and A NON-DEGENERATE BINARY COMPANION

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Keywords

ASJC Scopus subject areas

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