On the Geometry of the High‐Velocity Ejecta of the Peculiar Type Ia Supernova 2000cx | Zendy

R. C. Thomas | Zendy; David Branch | Zendy; E. Baron | Zendy; K. Nomoto | Zendy; Weidong Li | Zendy; A. V. Filippenko | Zendy

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On the Geometry of the High‐Velocity Ejecta of the Peculiar Type Ia Supernova 2000cx

Author(s) -

R. C. Thomas,

David Branch,

E. Baron,

K. Nomoto,

Weidong Li,

A. V. Filippenko

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/380632

Subject(s) - ejecta , supernova , physics , astrophysics , spectral line , type (biology) , absorption (acoustics) , astronomy , optics , geology , paleontology

High-velocity features in Type Ia supernova spectra provide a way to probethe outer layers of these explosions. The maximum-light spectra of the uniqueType Ia supernova 2000cx exhibit interesting Ca II features with high-velocitycomponents. The infrared triplet absorption is quadruply notched, while the H&Kabsorption is wide and flat. Stimulated by a three-dimensional interpretationof similar Ca II features in another Type Ia supernova (SN 2001el, Kasen et al.2003), we present alternative spherically symmetric and three-dimensionalejecta models to fit the high-velocity (v > 16,000 km/s) Ca II features of SN2000cx. We also present simple estimates of the high-velocity ejecta mass for afew trial compositions and discuss their implications for explosion modelling.Comment: 33 pages total, 13 figures, accepted by Ap

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