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Title: The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by

Abstract

We present early-time Swift and Chandra X-ray data along with late-time optical and near-infrared observations of SN 2013by, a Type IIL supernova (SN) that occurred in the nearby spiral galaxy ESO 138−G10 ( D ∼ 14.8 Mpc). Optical and NIR photometry and spectroscopy follow the late-time evolution of the SN from days +89 to +457 post maximum brightness. The optical spectra and X-ray light curves are consistent with the picture of an SN having prolonged interaction with circumstellar material (CSM) that accelerates the transition from SN to supernova remnant (SNR). Specifically, we find SN 2013by’s H α profile exhibits significant broadening (∼10,000 km s{sup −1}) on day +457, the likely consequence of high-velocity, H-rich material being excited by a reverse shock. A relatively flat X-ray light curve is observed that cannot be modeled using Inverse Compton scattering processes alone, but requires an additional energy source most likely originating from the SN-CSM interaction. In addition, we see the first overtone of CO emission near 2.3 μ m on day +152, signaling the formation of molecules and dust in the SN ejecta and is the first time CO has been detected in a Type IIL SN. We compare SN 2013by with Typemore » IIP SNe, whose spectra show the rarely observed SN-to-SNR transition in varying degrees and conclude that Type IIL SNe may enter the remnant phase at earlier epochs than their Type IIP counterparts.« less

Authors:
;  [1]; ;  [2];  [3];  [4]
  1. 6127 Wilder Lab, Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755 (United States)
  2. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  3. Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208 (United States)
  4. Parkdale Observatory, 225 Warren Road, RDl Oxford, Canterbury 7495 (New Zealand)
Publication Date:
OSTI Identifier:
22679781
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 848; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BRIGHTNESS; CARBON MONOXIDE; COMPARATIVE EVALUATIONS; COMPTON EFFECT; COSMIC DUST; EMISSION; ENERGY SOURCES; GALAXIES; MOLECULES; NEAR INFRARED RADIATION; PHOTOMETRY; SPECTRA; SPECTROSCOPY; STAR EVOLUTION; SUPERNOVA REMNANTS; TYPE II SUPERNOVAE; VELOCITY; VISIBLE RADIATION; X RADIATION

Citation Formats

Black, C. S., Fesen, R. A., Milisavljevic, D., Patnaude, D., Margutti, R., and Parker, S. The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA8999.
Black, C. S., Fesen, R. A., Milisavljevic, D., Patnaude, D., Margutti, R., & Parker, S. The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by. United States. doi:10.3847/1538-4357/AA8999.
Black, C. S., Fesen, R. A., Milisavljevic, D., Patnaude, D., Margutti, R., and Parker, S. Tue . "The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by". United States. doi:10.3847/1538-4357/AA8999.
@article{osti_22679781,
title = {The Transition of a Type IIL Supernova into a Supernova Remnant: Late-time Observations of SN 2013by},
author = {Black, C. S. and Fesen, R. A. and Milisavljevic, D. and Patnaude, D. and Margutti, R. and Parker, S.},
abstractNote = {We present early-time Swift and Chandra X-ray data along with late-time optical and near-infrared observations of SN 2013by, a Type IIL supernova (SN) that occurred in the nearby spiral galaxy ESO 138−G10 ( D ∼ 14.8 Mpc). Optical and NIR photometry and spectroscopy follow the late-time evolution of the SN from days +89 to +457 post maximum brightness. The optical spectra and X-ray light curves are consistent with the picture of an SN having prolonged interaction with circumstellar material (CSM) that accelerates the transition from SN to supernova remnant (SNR). Specifically, we find SN 2013by’s H α profile exhibits significant broadening (∼10,000 km s{sup −1}) on day +457, the likely consequence of high-velocity, H-rich material being excited by a reverse shock. A relatively flat X-ray light curve is observed that cannot be modeled using Inverse Compton scattering processes alone, but requires an additional energy source most likely originating from the SN-CSM interaction. In addition, we see the first overtone of CO emission near 2.3 μ m on day +152, signaling the formation of molecules and dust in the SN ejecta and is the first time CO has been detected in a Type IIL SN. We compare SN 2013by with Type IIP SNe, whose spectra show the rarely observed SN-to-SNR transition in varying degrees and conclude that Type IIL SNe may enter the remnant phase at earlier epochs than their Type IIP counterparts.},
doi = {10.3847/1538-4357/AA8999},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 848,
place = {United States},
year = {2017},
month = {10}
}