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Time-Varying Potassium in High-Resolution Spectra of the Type Ia Supernova 2014J

Graham, M. L. and Valenti, S. and Fulton, B. J. and Weiss, L. M. and Shen, K. J. and Kelly, P. L. and Zheng, W. and Filippenko, A. V. and Marcy, G. W. and Howell, D. A. and Burt, J. and Rivera, E. J. (2015) Time-Varying Potassium in High-Resolution Spectra of the Type Ia Supernova 2014J. Astrophysical Journal, 801 (2). Art. No. 136. ISSN 0004-637X.

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We present a time series of the highest resolution spectra yet published for the nearby Type Ia supernova (SN Ia) 2014J in M82. They were obtained at 11 epochs over 33 days around peak brightness with the Levy Spectrograph (resolution R ≈ 110,000) on the 2.4 m Automated Planet Finder telescope at Lick Observatory. We identify multiple Na i D and K i absorption features as well as absorption by Ca ii H&K and several of the more common diffuse interstellar bands (DIBs). We see no evolution in any component of Na i D, Ca ii, or in the DIBs, but do establish the dissipation/weakening of the two most blueshifted components of K i. We present several potential physical explanations, finding the most plausible to be photoionization of circumstellar material, and discuss the implications of our results with respect to the progenitor scenario of SN 2014J.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Graham, M. L.0000-0002-9154-3136
Valenti, S.0000-0001-8818-0795
Fulton, B. J.0000-0003-3504-5316
Weiss, L. M.0000-0002-3725-3058
Kelly, P. L.0000-0003-3142-997X
Filippenko, A. V.0000-0003-3460-0103
Marcy, G. W.0000-0002-2909-0113
Howell, D. A.0000-0003-4253-656X
Burt, J.0000-0002-0040-6815
Additional Information:© 2015 The American Astronomical Society. Received 2014 November 30; accepted 2015 January 16; published 2015 March 12. Based on observations made with the Levy Spectrometer on the 2.4 m APF telescope at Lick Observatory. We thank Ken and Gloria Levy for their generous contribution to the funding of the spectrometer, without which this unique time series of spectra of SN 2014J in M82 would have been impossible. We thank the Lick staff for their assistance. We gratefully acknowledge Ferdinando Patat, Helen Kirk, Sarah Sadavoy, Christopher F. McKee, and Richard McCray for helpful discussions. The supernova research of A.V.F.'s group at U.C. Berkeley is supported by Gary and Cynthia Bengier, the Richard and Rhoda Goldman Fund, the Christopher R. Redlich Fund, the TABASGO Foundation, and NSF grant AST-1211916. We also acknowledge NASA/HST grant GO-13286 from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. K. J. S. is supported by NASA through the Astrophysics Theory Program (NNX15AB16G). This work has also used the Weizmann Interactive Supernova Data Repository (WISEREP) at Facilities: APF - .
Funding AgencyGrant Number
Gary and Cynthia BengierUNSPECIFIED
Richard and Rhoda Goldman FundUNSPECIFIED
Christopher R. Redlich FundUNSPECIFIED
NASA Hubble FellowshipGO-13286
NASANAS 5-26555
Subject Keywords:supernovae: general – supernovae: individual (2014J)
Issue or Number:2
Record Number:CaltechAUTHORS:20180815-135647549
Persistent URL:
Official Citation:M. L. Graham et al 2015 ApJ 801 136
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88831
Deposited By: Tony Diaz
Deposited On:15 Aug 2018 21:04
Last Modified:09 Mar 2020 13:19

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