Analysis of type IIn SN 1998S: Effects of circumstellar interaction on observed spectra

Eric J. Lentz; E. Baron; Peter Lundqvist; David Branch; Peter H. Hauschildt; Claes Fransson; Peter Garnavich; Nate Bastian; Alexei V. Filippenko; R. P. Kirshner; P. M. Challis; S. Jha; Bruno Leibundgut; R. McCray; E. Michael; Nino Panagia; M. M. Phillips; C. S.J. Pun; Brian Schmidt; George Sonneborn; N. B. Suntzeff; L. Wang; J. C. Wheeler

doi:10.1086/318363

Analysis of type IIn SN 1998S: Effects of circumstellar interaction on observed spectra

Eric J. Lentz^*, E. Baron, Peter Lundqvist, David Branch, Peter H. Hauschildt, Claes Fransson, Peter Garnavich, Nate Bastian, Alexei V. Filippenko, R. P. Kirshner, P. M. Challis, S. Jha, Bruno Leibundgut, R. McCray, E. Michael, Nino Panagia, M. M. Phillips, C. S.J. Pun, Brian Schmidt, George SonnebornN. B. Suntzeff, L. Wang, J. C. Wheeler

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

We present spectral analysis of early observations of the Type IIn supernova 1998S using the general non-local thermodynamic equilibrium atmosphere code PHOENIX. We model both the underlying supernova spectrum and the overlying circumstellar interaction region and produce spectra in good agreement with observations. The early spectra are well fitted by lines produced primarily in the circumstellar region itself, and later spectra are due primarily to the supernova ejecta. Intermediate spectra are affected by both regions. A mass-loss rate of order M ∼ 0.0001-0.001 M_⊙ yr^-1 is inferred for a wind speed of 100-1000 km s^-1. We discuss how future self-consistent models will better clarify the underlying progenitor structure.

Original language	English
Pages (from-to)	406-411
Number of pages	6
Journal	Astrophysical Journal
Volume	547
Issue number	1 PART 1
DOIs	https://doi.org/10.1086/318363
Publication status	Published - 20 Jan 2001

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Lentz, E. J., Baron, E., Lundqvist, P., Branch, D., Hauschildt, P. H., Fransson, C., Garnavich, P., Bastian, N., Filippenko, A. V., Kirshner, R. P., Challis, P. M., Jha, S., Leibundgut, B., McCray, R., Michael, E., Panagia, N., Phillips, M. M., Pun, C. S. J., Schmidt, B., ... Wheeler, J. C. (2001). Analysis of type IIn SN 1998S: Effects of circumstellar interaction on observed spectra. Astrophysical Journal, 547(1 PART 1), 406-411. https://doi.org/10.1086/318363

@article{b266f25f75924ce78d362b641481b5d5,

title = "Analysis of type IIn SN 1998S: Effects of circumstellar interaction on observed spectra",

abstract = "We present spectral analysis of early observations of the Type IIn supernova 1998S using the general non-local thermodynamic equilibrium atmosphere code PHOENIX. We model both the underlying supernova spectrum and the overlying circumstellar interaction region and produce spectra in good agreement with observations. The early spectra are well fitted by lines produced primarily in the circumstellar region itself, and later spectra are due primarily to the supernova ejecta. Intermediate spectra are affected by both regions. A mass-loss rate of order M ∼ 0.0001-0.001 M⊙ yr-1 is inferred for a wind speed of 100-1000 km s-1. We discuss how future self-consistent models will better clarify the underlying progenitor structure.",

keywords = "Radiative transfer, Supernovae: individual (SN 1998S)",

author = "Lentz, {Eric J.} and E. Baron and Peter Lundqvist and David Branch and Hauschildt, {Peter H.} and Claes Fransson and Peter Garnavich and Nate Bastian and Filippenko, {Alexei V.} and Kirshner, {R. P.} and Challis, {P. M.} and S. Jha and Bruno Leibundgut and R. McCray and E. Michael and Nino Panagia and Phillips, {M. M.} and Pun, {C. S.J.} and Brian Schmidt and George Sonneborn and Suntzeff, {N. B.} and L. Wang and Wheeler, {J. C.}",

year = "2001",

month = jan,

day = "20",

doi = "10.1086/318363",

language = "English",

volume = "547",

pages = "406--411",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 PART 1",

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Lentz, EJ, Baron, E, Lundqvist, P, Branch, D, Hauschildt, PH, Fransson, C, Garnavich, P, Bastian, N, Filippenko, AV, Kirshner, RP, Challis, PM, Jha, S, Leibundgut, B, McCray, R, Michael, E, Panagia, N, Phillips, MM, Pun, CSJ, Schmidt, B, Sonneborn, G, Suntzeff, NB, Wang, L & Wheeler, JC 2001, 'Analysis of type IIn SN 1998S: Effects of circumstellar interaction on observed spectra', Astrophysical Journal, vol. 547, no. 1 PART 1, pp. 406-411. https://doi.org/10.1086/318363

TY - JOUR

T1 - Analysis of type IIn SN 1998S

T2 - Effects of circumstellar interaction on observed spectra

AU - Lentz, Eric J.

AU - Baron, E.

AU - Lundqvist, Peter

AU - Branch, David

AU - Hauschildt, Peter H.

AU - Fransson, Claes

AU - Garnavich, Peter

AU - Bastian, Nate

AU - Filippenko, Alexei V.

AU - Kirshner, R. P.

AU - Challis, P. M.

AU - Jha, S.

AU - Leibundgut, Bruno

AU - McCray, R.

AU - Michael, E.

AU - Panagia, Nino

AU - Phillips, M. M.

AU - Pun, C. S.J.

AU - Schmidt, Brian

AU - Sonneborn, George

AU - Suntzeff, N. B.

AU - Wang, L.

AU - Wheeler, J. C.

PY - 2001/1/20

Y1 - 2001/1/20

N2 - We present spectral analysis of early observations of the Type IIn supernova 1998S using the general non-local thermodynamic equilibrium atmosphere code PHOENIX. We model both the underlying supernova spectrum and the overlying circumstellar interaction region and produce spectra in good agreement with observations. The early spectra are well fitted by lines produced primarily in the circumstellar region itself, and later spectra are due primarily to the supernova ejecta. Intermediate spectra are affected by both regions. A mass-loss rate of order M ∼ 0.0001-0.001 M⊙ yr-1 is inferred for a wind speed of 100-1000 km s-1. We discuss how future self-consistent models will better clarify the underlying progenitor structure.

AB - We present spectral analysis of early observations of the Type IIn supernova 1998S using the general non-local thermodynamic equilibrium atmosphere code PHOENIX. We model both the underlying supernova spectrum and the overlying circumstellar interaction region and produce spectra in good agreement with observations. The early spectra are well fitted by lines produced primarily in the circumstellar region itself, and later spectra are due primarily to the supernova ejecta. Intermediate spectra are affected by both regions. A mass-loss rate of order M ∼ 0.0001-0.001 M⊙ yr-1 is inferred for a wind speed of 100-1000 km s-1. We discuss how future self-consistent models will better clarify the underlying progenitor structure.

KW - Radiative transfer

KW - Supernovae: individual (SN 1998S)

UR - http://www.scopus.com/inward/record.url?scp=0035915847&partnerID=8YFLogxK

U2 - 10.1086/318363

DO - 10.1086/318363

M3 - Article

SN - 0004-637X

VL - 547

SP - 406

EP - 411

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 1

ER -

Analysis of type IIn SN 1998S: Effects of circumstellar interaction on observed spectra

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