SIMBAD references

2019MNRAS.485.5120B - Mon. Not. R. Astron. Soc., 485, 5120-5141 (2019/June-1)

Signatures of circumstellar interaction in the Type IIL supernova ASASSN-15oz.

BOSTROEM K.A., VALENTI S., HORESH A., MOROZOVA V., KUIN N.P.M., WYATT S., JERKSTRAND A., SAND D.J., LUNDQUIST M., SMITH M., SULLIVAN M., HOSSEINZADEH G., ARCAVI I., CALLIS E., CARTIER R., GAL-YAM A., GALBANY L., GUTIERREZ C., HOWELL D.A., INSERRA C., KANKARE E., LOPEZ K.M., McCULLY C., PIGNATA G., PIRO A.L., RODRIGUEZ O., SMARTT S.J., SMITH K.W., YARON O. and YOUNG D.R.

Abstract (from CDS):

Hydrogen-rich, core-collapse supernovae are typically divided into four classes: IIP, IIL, IIn, and IIb. Recent hydrodynamic modelling shows that circumstellar material is required to produce the early light curves of most IIP/IIL supernovae. In this scenario, IIL supernovae experience large amounts of mass-loss before exploding. We test this hypothesis on ASASSN-15oz, a Type IIL supernova. With extensive follow-up in the X-ray, UV, optical, IR, and radio, we present our search for signs of interaction and the mass-loss history indicated by their detection. We find evidence of short-lived intense mass-loss just prior to explosion from light-curve modelling, amounting in 1.5 M of material within 1800 R of the progenitor. We also detect the supernova in the radio, indicating mass-loss rates of 10–6 to 10–7 M yr–1 prior to the extreme mass-loss period. Our failure to detect the supernova in the X-ray and the lack of narrow emission lines in the UV, optical, and NIR do not contradict this picture and place an upper limit on the mass-loss rate outside the extreme period of <10–4 M yr–1. This paper highlights the importance gathering comprehensive data on more Type II supernovae to enable detailed modelling of the progenitor and supernova which can elucidate their mass-loss histories and envelope structures and thus inform stellar evolution models.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: imaging spectroscopy - stars: late-type - supernovae: general - supernovae: individual: ASASSN-15oz - stars: winds, outflows

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 20

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2020.09.19-02:30:19

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