Abstract
ABSTRACTA comparative study of near–maximum‐light optical spectra of 24 Type Ia supernovae (SNe Ia) is presented. The spectra are assigned to four groups. Seven “core‐normal” SNe Ia have very similar spectra, except for strong, high‐velocity Ca ii absorption in SN 2001el. Seven SNe Ia are assigned to a “broad‐line” group, the most extreme of which is SN 1984A. Five SNe Ia, including SN 1991bg, are assigned to a “cool” group. Five SNe Ia, including SN 1991T, are assigned to a “shallow‐silicon” group. Comparisons with SYNOW synthetic spectra provide a basis for discussion of line identifications and an internally consistent quantification of the maximum‐light spectroscopic diversity among SNe Ia. The extent to which SN Ia maximum‐light spectra appear to have a continuous distribution of properties, rather than consist of discrete subtypes, is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Publications of the Astronomical Society of the Pacific
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
