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

Abstract

We present a time series of the highest resolution spectra yet published for the nearby Type Ia supernova (SN) 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 2.4m Automated Planet Finder telescope at Lick Observatory. We identify multiple Na I D and K I absorption features, as well as absorption by Ca I H & K and several of the more common diffuse interstellar bands (DIBs). We see no evolution in any component of Na I D, Ca I, 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.

11 pages, 8 figures, 3 tables, submitted to ApJ

References in corpus (12)

• Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
• Evidence for Two Distinct Populations of Type Ia Supernovae
• Variable Sodium Absorption in a Low-Extinction Type Ia Supernova
• Extensive HST Ultraviolet Spectra and Multi-wavelength Observations of SN 2014J in M82 Indicate Reddening and Circumstellar Scattering by Typical Dust
• The rise of SN2014J in the nearby galaxy M82
• No X-rays from the very nearby Type Ia SN2014J: constraints on its environment
• Constraints on the progenitor system and the environs of SN 2014J from deep radio observations
• Constraints on the Progenitor System of the Type Ia Supernova 2014J from Pre-Explosion Hubble Space Telescope Imaging
• Constraints on the origin of the first light from SN2014J
• Optical and Near-Infrared Polarimetry of Highly Reddened Type Ia Supernova 2014J: Peculiar Properties of Dust in M82
• Diffuse Interstellar Bands vs. Known Atomic and Molecular Species in the Interstellar Medium of M82 toward SN 2014J
• What sodium absorption lines tell us about type Ia supernovae

Cited by in corpus (15)

• Swift Ultraviolet Observations of Supernova 2014J in M82: Large Extinction from Interstellar Dust
• The Deepest Radio Observations of Nearby Type IA Supernovae: Constraining Progenitor Types and Optimizing Future Surveys
• The circumstellar matter of supernova 2014J and the core-degenerate scenario
• Interstellar-Medium Mapping in M82 Through Light Echoes Around Supernova 2014J
• Estimating dust distances to Type Ia supernovae from colour excess time-evolution
• Constraining magnetic field amplification in SN shocks using radio observations of SNe 2011fe and 2014J
• Time series of high resolution spectra of SN 2014J observed with the TIGRE telescope
• Mapping diffuse interstellar bands in the local ISM on small scales via MUSE 3D spectroscopy
• Probing gas and dust in the tidal tail of NGC 5221 with the type Ia supernova iPTF16abc
• No evidence of circumstellar gas surrounding Type Ia Supernova SN 2017cbv
• Do Type Ia Supernovae Explode Inside Planetary Nebulae?
• Narrow absorption lines from intervening material in supernovae I. Measurements and temporal evolution
• Narrow absorption lines from intervening material in supernovae. II. Galaxy properties
• On the Time Variation of Dust Extinction and Gas Absorption for Type~Ia Supernovae Observed Through Non-uniform Interstellar Medium
• A real-time search for Type Ia Supernovae with late-time CSM interaction in ZTF