Optical Spectra of the Type Ia Supernova 1998aq

Abstract

We present 29 optical spectra of the normal Type Ia SN 1998aq, ranging from 9 days before to 241 days after the time of maximum brightness. This spectroscopic data set, together with photometric data presented elsewhere, makes SN 1998aq one of the best observed Type Ia supernova at optical wavelengths. We use the parameterized supernova synthetic-spectrum code SYNOW to study line identifications in the early photospheric-phase spectra. The results include evidence for lines of singly ionized carbon, at ejection velocities as low as 11,000 km/sec. Implications for explosion models are discussed.

arXiv comment40 pages including 20 figures and 4 tables. Accepted by AJ

References in corpus (16)

• Evidence for a Spectroscopic Sequence Among SNe Ia
• Thermonuclear Supernovae: Simulations of the Deflagration Stage and Their Implications
• Detailed Analysis of Early to Late-Time Spectra of Supernova 1993J
• A High Intrinsic Peculiarity Rate Among Type Ia Supernovae
• Direct Analysis of Spectra of Type Ib Supernovae
• Cepheid Calibration of the Peak Brightness of SNe Ia. XI. SN 1998aq in NGC 3982
• The template type Ia supernova 1996X
• Ion Signatures in Supernova Spectra
• On the High--Velocity Ejecta of the Type Ia Supernova 1994D
• On the Spectroscopic Diversity of Type Ia Supernovae
• NLTE Synthetic Spectral Fits to the Type Ia Supernova 1994D in NGC 4526
• On the presence of Silicon and Carbon in the pre-maximum spectrum of the Type Ia SN 1990N
• Spectral Consequences of Deviation from Spherical Composition Symmetry in Type Ia Supernovae
• SN 1984A and Delayed Detonation Models of Type Ia Supernovae
• Detectibility of Mixed Unburnt C+O in Type Ia Supernova Spectra
• The Distance to Supernova 1998aq in NGC3982

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