Showing papers by "Nate Bastian published in 2001"
University of Oklahoma1, University of Georgia2, University of Notre Dame3, University of Wisconsin-Madison4, University of California, Berkeley5, Harvard University6, European Southern Observatory7, University of Colorado Boulder8, Space Telescope Science Institute9, Carnegie Institution for Science10, Goddard Space Flight Center11, Australian National University12, University of Texas at Austin13
TL;DR: In this article, the authors present spectral analysis of early observations of the Type IIn supernova 1998S using the general non-local thermodynamic equilibrium atmosphere code PHOENIX.
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 ~ 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.
41 citations