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Multi-epoch high-spectral-resolution observations of neutral sodium in 14 Type Ia supernovae

Sternberg, A. and Gal-Yam, A. and Simon, J. D. and Patat, F. and Hillebrandt, W. and Phillips, M. M. and Foley, R. J. and Thompson, I. and Morrell, N. and Chomiuk, L. and Soderberg, A. M. and Yong, D. and Kraus, A. L. and Herczeg, G. J. and Hsiao, E. Y. and Raskutti, S. and Cohen, J. G. and Mazzali, P. A. and Nomoto, K. (2014) Multi-epoch high-spectral-resolution observations of neutral sodium in 14 Type Ia supernovae. Monthly Notices of the Royal Astronomical Society, 443 (2). pp. 1849-1860. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20140911-134416477

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Abstract

One of the main questions concerning Type Ia supernovae is the nature of the binary companion of the exploding white dwarf. A major discriminant between different suggested models is the presence and physical properties of circumstellar material at the time of explosion. If present, this material will be ionized by the ultraviolet radiation of the explosion and later recombine. This ionization–recombination should manifest itself as time-variable absorption features that can be detected via multi-epoch high-spectral-resolution observations. Previous studies have shown that the strongest effect is seen in the neutral sodium D lines. We report on observations of neutral sodium absorption features observed in multi-epoch high-resolution spectra of 14 Type Ia supernova events. This is the first multi-epoch high-resolution study to include multiple SNe. No variability in line strength that can be associated with circumstellar material is detected in the events presented in this paper. If we include previously published events, we find that ∼18 per cent of the events in the extended sample exhibit time-variable sodium features associated with circumstellar material. We explore the implication of this study on our understanding of the progenitor systems of Type Ia supernovae via the current Type Ia supernova multi-epoch high-spectral-resolution sample.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1093/mnras/stu1202DOIArticle
http://arxiv.org/abs/1311.3645arXivDiscussion Paper
ORCID:
AuthorORCID
Gal-Yam, A.0000-0002-3653-5598
Patat, F.0000-0002-0537-3573
Phillips, M. M.0000-0003-2734-0796
Morrell, N.0000-0003-2535-3091
Chomiuk, L.0000-0002-8400-3705
Kraus, A. L.0000-0001-9811-568X
Herczeg, G. J.0000-0002-7154-6065
Cohen, J. G.0000-0002-8039-4673
Mazzali, P. A.0000-0001-6876-8284
Nomoto, K.0000-0001-9553-0685
Additional Information:© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2014 June 17. Received 2014 June 16; in original form 2013 November 14. We thank the anonymous referee for his comments that help us improve our paper. AS is supported by a Minerva Fellowship. The research of AG is supported by the EU/FP7 via an ERC grant no. 307260, the Minerva ARCHES prize and the Kimmel award. The authors would like to acknowledge the generosity of the late Wallace L. W. Sargent in providing data. The authors would also like to acknowledge the help of D. J. Osip and J. F. Steiner in obtaining the data. Partially based on observations made with ESO Telescopes at the La Silla Paranal Observatory, Chile, under programme ID 289.D-5023, 290.D-5010, 290.D-5023, 091.D-0780. This paper includes data gathered with the 6.5 metre Magellan Telescopes located at Las Campanas Observatory, Chile. Some of the data presented herein were obtained at the W.M.Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Partially based on observations made with ESO Telescopes at the La Silla Paranal Observatory, Chile, under programme. ID 289.D-5023, 290.D-5010, 290.D-5023, 091.D-0780.
Funders:
Funding AgencyGrant Number
Minerva FoundationUNSPECIFIED
European Research Council (ERC)307260
Minerva ARCHESUNSPECIFIED
Kimmel AwardUNSPECIFIED
Subject Keywords:circumstellar matter; supernovae: general; ISM: general
Issue or Number:2
Record Number:CaltechAUTHORS:20140911-134416477
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140911-134416477
Official Citation:Sternberg, A., Gal-Yam, A., Simon, J. D., Patat, F., Hillebrandt, W., Phillips, M. M., . . .Nomoto, K. (2014). Multi-epoch high-spectral-resolution observations of neutral sodium in 14 Type Ia supernovae. Monthly Notices of the Royal Astronomical Society, 443(2), 1849-1860. doi: 10.1093/mnras/stu1202
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49614
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:11 Sep 2014 23:49
Last Modified:09 Mar 2020 13:19

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