SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION
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 c...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2017
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| Online Access: | http://hdl.handle.net/1721.1/109517 |
| _version_ | 1810972696664604672 |
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| author | Marion, G. H. Brown, Peter J. Vinkó, Jozsef Silverman, Jeffrey M. Sand, David J. Challis, Peter Kirshner, Robert P. Wheeler, J. Craig Berlind, Perry Brown, Warren R. Calkins, Michael L. Camacho, Yssavo Dhungana, Govinda Foley, Ryan J. Graham, Melissa L. Howell, D. Andrew Hsiao, Eric Y. Irwin, Jonathan M. Jha, Saurabh W. Kehoe, Robert Macri, Lucas M. Maeda, Keiichi Mandel, Kaisey McCully, Curtis Pandya, Viraj Rines, Kenneth J. Wilhelmy, Steven Zheng, Weikang Friedman, Andrew Samuel |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Marion, G. H. Brown, Peter J. Vinkó, Jozsef Silverman, Jeffrey M. Sand, David J. Challis, Peter Kirshner, Robert P. Wheeler, J. Craig Berlind, Perry Brown, Warren R. Calkins, Michael L. Camacho, Yssavo Dhungana, Govinda Foley, Ryan J. Graham, Melissa L. Howell, D. Andrew Hsiao, Eric Y. Irwin, Jonathan M. Jha, Saurabh W. Kehoe, Robert Macri, Lucas M. Maeda, Keiichi Mandel, Kaisey McCully, Curtis Pandya, Viraj Rines, Kenneth J. Wilhelmy, Steven Zheng, Weikang Friedman, Andrew Samuel |
| author_sort | Marion, G. H. |
| collection | MIT |
| description | 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 B - V 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 M[subscript B] =- 19.62 ± 0.02 mag and Δm[subscript 15(B) = 0.86 ± 0.02. 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[subscript Si] = −10,500 km s[superscript −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. |
| first_indexed | 2024-09-23T07:55:48Z |
| format | Article |
| id | mit-1721.1/109517 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T07:55:48Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
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| spelling | mit-1721.1/1095172022-09-23T09:42:31Z SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION Marion, G. H. Brown, Peter J. Vinkó, Jozsef Silverman, Jeffrey M. Sand, David J. Challis, Peter Kirshner, Robert P. Wheeler, J. Craig Berlind, Perry Brown, Warren R. Calkins, Michael L. Camacho, Yssavo Dhungana, Govinda Foley, Ryan J. Graham, Melissa L. Howell, D. Andrew Hsiao, Eric Y. Irwin, Jonathan M. Jha, Saurabh W. Kehoe, Robert Macri, Lucas M. Maeda, Keiichi Mandel, Kaisey McCully, Curtis Pandya, Viraj Rines, Kenneth J. Wilhelmy, Steven Zheng, Weikang Friedman, Andrew Samuel Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Program in Science, Technology and Society Friedman, Andrew Samuel 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 B - V 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 M[subscript B] =- 19.62 ± 0.02 mag and Δm[subscript 15(B) = 0.86 ± 0.02. 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[subscript Si] = −10,500 km s[superscript −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. National Science Foundation (U.S.). Graduate Research Fellowship Program United States. National Aeronautics and Space Administration (Graduate Research Program Fellowship) National Science Foundation (U.S.). Division of Social and Economic Sciences (award SES-1056580) 2017-06-01T19:55:30Z 2017-06-01T19:55:30Z 2017-06-01 Article http://purl.org/eprint/type/JournalArticle 1538-4357 http://hdl.handle.net/1721.1/109517 Marion, G. H., Peter J. Brown, Jozsef Vinkó, Jeffrey M. Silverman, David J. Sand, Peter Challis, Robert P. Kirshner, et al. “SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION.” The Astrophysical Journal 820, no. 2 (March 23, 2016): 92. © 2016 The American Astronomical Society en_US http://dx.doi.org/10.3847/0004-637X/820/2/92 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Marion, G. H. Brown, Peter J. Vinkó, Jozsef Silverman, Jeffrey M. Sand, David J. Challis, Peter Kirshner, Robert P. Wheeler, J. Craig Berlind, Perry Brown, Warren R. Calkins, Michael L. Camacho, Yssavo Dhungana, Govinda Foley, Ryan J. Graham, Melissa L. Howell, D. Andrew Hsiao, Eric Y. Irwin, Jonathan M. Jha, Saurabh W. Kehoe, Robert Macri, Lucas M. Maeda, Keiichi Mandel, Kaisey McCully, Curtis Pandya, Viraj Rines, Kenneth J. Wilhelmy, Steven Zheng, Weikang Friedman, Andrew Samuel SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION |
| title | SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION |
| title_full | SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION |
| title_fullStr | SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION |
| title_full_unstemmed | SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION |
| title_short | SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION |
| title_sort | sn 2012cg evidence for interaction between a normal sn ia and a non degenerate binary companion |
| url | http://hdl.handle.net/1721.1/109517 |
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