TIME-VARYING POTASSIUM IN HIGH-RESOLUTION SPECTRA OF THE TYPE IA SUPERNOVA 2014J

Journal Article · Tue Mar 10 04:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/801/2/136· OSTI ID:22522080

Graham, M. L.; Weiss, L. M.; Shen, K. J.; Kelly, P. L.; Zheng, W.; Filippenko, A. V.; Marcy, G. W. ^[1]; Valenti, S.; Howell, D. A. ^[2]; Fulton, B. J. ^[3]; Burt, J.; Rivera, E. J. ^[4]

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1. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
2. Las Cumbres Observatory Global Telescope Network, Goleta, CA 93117 (United States)
3. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Dr., Honolulu, HI 96822 (United States)
4. UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)

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 and 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.

• OSTI ID: 22522080
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 801; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION SPECTRA
BRIGHTNESS
CALCIUM
EMISSION SPECTRA
PHOTOIONIZATION
PLANETS
POTASSIUM
RESOLUTION
SODIUM
SUPERNOVAE
TELESCOPES