ANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101
The nearby Type Ia supernova (SNIa) SN2011fe in M101 (cz = 241kms -1) provides a unique opportunity to study the early evolution of a "normal" SNIa, its compositional structure, and its elusive progenitor system. We present 18 high signal-to-noise spectra of SN2011fe during its first month...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2012
|
| _version_ | 1826273272960909312 |
|---|---|
| author | Parrent, J Howell, D Friesen, B Thomas, R Fesen, R Milisavljevic, D Bianco, F Dilday, B Nugent, P Baron, E Arcavi, I Ben-Ami, S Bersier, D Bildsten, L Bloom, J Cao, Y Cenko, S Filippenko, A Gal-Yam, A Kasliwal, M Konidaris, N Kulkarni, SR Law, N Levitan, D Maguire, K |
| author_facet | Parrent, J Howell, D Friesen, B Thomas, R Fesen, R Milisavljevic, D Bianco, F Dilday, B Nugent, P Baron, E Arcavi, I Ben-Ami, S Bersier, D Bildsten, L Bloom, J Cao, Y Cenko, S Filippenko, A Gal-Yam, A Kasliwal, M Konidaris, N Kulkarni, SR Law, N Levitan, D Maguire, K |
| author_sort | Parrent, J |
| collection | OXFORD |
| description | The nearby Type Ia supernova (SNIa) SN2011fe in M101 (cz = 241kms -1) provides a unique opportunity to study the early evolution of a "normal" SNIa, its compositional structure, and its elusive progenitor system. We present 18 high signal-to-noise spectra of SN2011fe during its first month beginning 1.2days post-explosion and with an average cadence of 1.8days. 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 16,000kms-1. This supports the notion that incomplete burning, in addition to progenitor scenarios, is a relevant source of spectroscopic diversity among SNeIa. The observed evolution of the highly Doppler-shifted O I λ7774 absorption features detected within 5days post-explosion indicates the presence of O I with expansion velocities from 11,500 to 21,000kms-1. The fact that some O I is present above C II suggests that SN2011fe may have had an appreciable amount of unburned oxygen within the outer layers of the ejecta. © 2012. The American Astronomical Society. All rights reserved.. |
| first_indexed | 2024-03-06T22:25:41Z |
| format | Journal article |
| id | oxford-uuid:569a4288-c94c-40c4-8ba8-cc87bfc4d898 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:25:41Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:569a4288-c94c-40c4-8ba8-cc87bfc4d8982022-03-26T16:51:15ZANALYSIS OF THE EARLY-TIME OPTICAL SPECTRA OF SN 2011fe IN M101Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:569a4288-c94c-40c4-8ba8-cc87bfc4d898EnglishSymplectic Elements at Oxford2012Parrent, JHowell, DFriesen, BThomas, RFesen, RMilisavljevic, DBianco, FDilday, BNugent, PBaron, EArcavi, IBen-Ami, SBersier, DBildsten, LBloom, JCao, YCenko, SFilippenko, AGal-Yam, AKasliwal, MKonidaris, NKulkarni, SRLaw, NLevitan, DMaguire, KThe nearby Type Ia supernova (SNIa) SN2011fe in M101 (cz = 241kms -1) provides a unique opportunity to study the early evolution of a "normal" SNIa, its compositional structure, and its elusive progenitor system. We present 18 high signal-to-noise spectra of SN2011fe during its first month beginning 1.2days post-explosion and with an average cadence of 1.8days. 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 16,000kms-1. This supports the notion that incomplete burning, in addition to progenitor scenarios, is a relevant source of spectroscopic diversity among SNeIa. The observed evolution of the highly Doppler-shifted O I λ7774 absorption features detected within 5days post-explosion indicates the presence of O I with expansion velocities from 11,500 to 21,000kms-1. The fact that some O I is present above C II suggests that SN2011fe may have had an appreciable amount of unburned oxygen within the outer layers of the ejecta. © 2012. The American Astronomical Society. All rights reserved.. |
| spellingShingle | Parrent, J Howell, D Friesen, B Thomas, R Fesen, R Milisavljevic, D Bianco, F Dilday, B Nugent, P Baron, E Arcavi, I Ben-Ami, S Bersier, D Bildsten, L Bloom, J Cao, Y Cenko, S Filippenko, A Gal-Yam, A Kasliwal, M Konidaris, N Kulkarni, SR Law, N Levitan, D Maguire, K 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 |
| work_keys_str_mv | AT parrentj analysisoftheearlytimeopticalspectraofsn2011feinm101 AT howelld analysisoftheearlytimeopticalspectraofsn2011feinm101 AT friesenb analysisoftheearlytimeopticalspectraofsn2011feinm101 AT thomasr analysisoftheearlytimeopticalspectraofsn2011feinm101 AT fesenr analysisoftheearlytimeopticalspectraofsn2011feinm101 AT milisavljevicd analysisoftheearlytimeopticalspectraofsn2011feinm101 AT biancof analysisoftheearlytimeopticalspectraofsn2011feinm101 AT dildayb analysisoftheearlytimeopticalspectraofsn2011feinm101 AT nugentp analysisoftheearlytimeopticalspectraofsn2011feinm101 AT barone analysisoftheearlytimeopticalspectraofsn2011feinm101 AT arcavii analysisoftheearlytimeopticalspectraofsn2011feinm101 AT benamis analysisoftheearlytimeopticalspectraofsn2011feinm101 AT bersierd analysisoftheearlytimeopticalspectraofsn2011feinm101 AT bildstenl analysisoftheearlytimeopticalspectraofsn2011feinm101 AT bloomj analysisoftheearlytimeopticalspectraofsn2011feinm101 AT caoy analysisoftheearlytimeopticalspectraofsn2011feinm101 AT cenkos analysisoftheearlytimeopticalspectraofsn2011feinm101 AT filippenkoa analysisoftheearlytimeopticalspectraofsn2011feinm101 AT galyama analysisoftheearlytimeopticalspectraofsn2011feinm101 AT kasliwalm analysisoftheearlytimeopticalspectraofsn2011feinm101 AT konidarisn analysisoftheearlytimeopticalspectraofsn2011feinm101 AT kulkarnisr analysisoftheearlytimeopticalspectraofsn2011feinm101 AT lawn analysisoftheearlytimeopticalspectraofsn2011feinm101 AT levitand analysisoftheearlytimeopticalspectraofsn2011feinm101 AT maguirek analysisoftheearlytimeopticalspectraofsn2011feinm101 |