SN 2023ixf in Messier 101: Photo-ionization of Dense, Close-in Circumstellar Material in a Nearby Type II Supernova - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue The Astrophysical journal letters Année : 2023

SN 2023ixf in Messier 101: Photo-ionization of Dense, Close-in Circumstellar Material in a Nearby Type II Supernova

W. Jacobson-Galán
R. Margutti
R. Chornock
R. Foley
C. Kilpatrick
D. Jones
K. Taggart
C. Angus
S. Bhattacharjee
L. Braff
D. Brethauer
A. Burgasser
F. Cao
  • Fonction : Auteur
C. Carlile
  • Fonction : Auteur
K. Chambers
D. Coulter
E. Dominguez-Ruiz
C. Dickinson
T. de Boer
A. Gagliano
C. Gall
H. Gao
E. Gates
S. Gomez
M. Guolo
M. Halford
J. Hjorth
M. Huber
M. Johnson
P. Karpoor
  • Fonction : Auteur
T. Laskar
N Lebaron
Z. Li
Y. Lin
  • Fonction : Auteur
S. Loch
P. Lynam
  • Fonction : Auteur
E. Magnier
P. Maloney
  • Fonction : Auteur
D. Matthews
M. Mcdonald
  • Fonction : Auteur
H.-Y. Miao
D. Milisavljevic
Y.-C. Pan
S. Pradyumna
  • Fonction : Auteur
C. Ransome
J. Rees
A. Rest
C. Rojas-Bravo
N. Sandford
L. Sandoval Ascencio
S. Sanjaripour
  • Fonction : Auteur
A. Savino
H. Sears
N. Sharei
  • Fonction : Auteur
S. Smartt
E. Softich
C. Theissen
S. Tinyanont
H. Tohfa
  • Fonction : Auteur
V. Villar
Q. Wang
R. Wainscoat
A. Westerling
E. Wiston
  • Fonction : Auteur
M. Wozniak
S. Yadavalli
Y. Zenati

Résumé

Abstract We present UV and/or optical observations and models of SN 2023ixf, a type II supernova (SN) located in Messier 101 at 6.9 Mpc. Early time ( flash ) spectroscopy of SN 2023ixf, obtained primarily at Lick Observatory, reveals emission lines of H i , He i/ii , C iv , and N iii/iv/v with a narrow core and broad, symmetric wings arising from the photoionization of dense, close-in circumstellar material (CSM) located around the progenitor star prior to shock breakout. These electron-scattering broadened line profiles persist for ∼8 days with respect to first light, at which time Doppler broadened the features from the fastest SN ejecta form, suggesting a reduction in CSM density at r ≳ 10 15 cm. The early time light curve of SN 2023ixf shows peak absolute magnitudes (e.g., M u = −18.6 mag, M g = −18.4 mag) that are ≳2 mag brighter than typical type II SNe, this photometric boost also being consistent with the shock power supplied from CSM interaction. Comparison of SN 2023ixf to a grid of light-curve and multiepoch spectral models from the non-LTE radiative transfer code CMFGEN and the radiation-hydrodynamics code HERACLES suggests dense, solar-metallicity CSM confined to r = (0.5–1) × 10 15 cm, and a progenitor mass-loss rate of M ̇ = 10 − 2 M ⊙ yr −1 . For the assumed progenitor wind velocity of v w = 50 km s −1 , this corresponds to enhanced mass loss (i.e., superwind phase) during the last ∼3–6 yr before explosion.
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hal-04244755 , version 1 (20-10-2023)

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W. Jacobson-Galán, Luc Dessart, R. Margutti, R. Chornock, R. Foley, et al.. SN 2023ixf in Messier 101: Photo-ionization of Dense, Close-in Circumstellar Material in a Nearby Type II Supernova. The Astrophysical journal letters, 2023, 954 (2), pp.L42. ⟨10.3847/2041-8213/acf2ec⟩. ⟨hal-04244755⟩
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