ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101
The nearby Type Ia supernova (SN Ia) SN 2011fe in M101 (cz = 241 km s[superscript –1]) provides a unique opportunity to study the early evolution of a "normal" SN Ia, its compositional structure, and its elusive progenitor system. We present 18 high signal-to-noise spectra of SN 2011fe dur...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95461 |
| _version_ | 1826192911511846912 |
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| author | Polishook, David |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Polishook, David |
| author_sort | Polishook, David |
| collection | MIT |
| description | The nearby Type Ia supernova (SN Ia) SN 2011fe in M101 (cz = 241 km s[superscript –1]) provides a unique opportunity to study the early evolution of a "normal" SN Ia, its compositional structure, and its elusive progenitor system. We present 18 high signal-to-noise spectra of SN 2011fe during its first month beginning 1.2 days post-explosion and with an average cadence of 1.8 days. This gives a clear picture of how various line-forming species are distributed within the outer layers of the ejecta, including that of unburned material (C+O). We follow the evolution of C II absorption features until they diminish near maximum light, showing overlapping regions of burned and unburned material between ejection velocities of 10,000 and 16,000 km s[superscript –1]. This supports the notion that incomplete burning, in addition to progenitor scenarios, is a relevant source of spectroscopic diversity among SNe Ia. The observed evolution of the highly Doppler-shifted O I λ7774 absorption features detected within 5 days post-explosion indicates the presence of O I with expansion velocities from 11,500 to 21,000 km s[superscript –1]. The fact that some O I is present above C II suggests that SN 2011fe may have had an appreciable amount of unburned oxygen within the outer layers of the ejecta. |
| first_indexed | 2024-09-23T09:30:44Z |
| format | Article |
| id | mit-1721.1/95461 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:30:44Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/954612022-09-26T11:55:50Z ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 Polishook, David Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Polishook, David The nearby Type Ia supernova (SN Ia) SN 2011fe in M101 (cz = 241 km s[superscript –1]) provides a unique opportunity to study the early evolution of a "normal" SN Ia, its compositional structure, and its elusive progenitor system. We present 18 high signal-to-noise spectra of SN 2011fe during its first month beginning 1.2 days post-explosion and with an average cadence of 1.8 days. This gives a clear picture of how various line-forming species are distributed within the outer layers of the ejecta, including that of unburned material (C+O). We follow the evolution of C II absorption features until they diminish near maximum light, showing overlapping regions of burned and unburned material between ejection velocities of 10,000 and 16,000 km s[superscript –1]. This supports the notion that incomplete burning, in addition to progenitor scenarios, is a relevant source of spectroscopic diversity among SNe Ia. The observed evolution of the highly Doppler-shifted O I λ7774 absorption features detected within 5 days post-explosion indicates the presence of O I with expansion velocities from 11,500 to 21,000 km s[superscript –1]. The fact that some O I is present above C II suggests that SN 2011fe may have had an appreciable amount of unburned oxygen within the outer layers of the ejecta. 2015-02-20T18:51:22Z 2015-02-20T18:51:22Z 2012-05 2012-04 Article http://purl.org/eprint/type/JournalArticle 2041-8205 2041-8213 http://hdl.handle.net/1721.1/95461 Parrent, J. T., D. A. Howell, B. Friesen, R. C. Thomas, R. A. Fesen, D. Milisavljevic, F. B. Bianco, et al. “ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101.” The Astrophysical Journal 752, no. 2 (May 31, 2012): L26. © 2012 The American Astronomical Society en_US http://dx.doi.org/10.1088/2041-8205/752/2/l26 The Astrophysical Journal. Letters 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 American Astronomical Society |
| spellingShingle | Polishook, David ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 |
| title | ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 |
| title_full | ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 |
| title_fullStr | ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 |
| title_full_unstemmed | ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 |
| title_short | ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101 |
| title_sort | analysis of the early time optical spectra of sn 2011fe in m101 |
| url | http://hdl.handle.net/1721.1/95461 |
| work_keys_str_mv | AT polishookdavid analysisoftheearlytimeopticalspectraofsn2011feinm101 |