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High-Velocity Features: A Ubiquitous Property of Type Ia Supernovae

Mazzali, Paolo A; Benetti, Stefano; Altavilla, G; Blanc, G; Cappellaro, Enrico; Elias-Rosa (Elias de la Rosa), Nancy; Garavini, Gabriele; Goobar, Ariel; Hartunian, A; Kotak, R; Leibundgut, Bruno; Lundqvist, Peter; Mattila, S; Mendez, J; Nobili, Serena; Pain, Reynald; Pastorello, A; Patat, Ferdinando; Pignata, Giuliano; Podsiadlowski, Ph.; Ruiz-Lapuente, P; Salvo, Maria; Sollerman, Jesper; Stanishev, Vallery; Stehle, M; Tout, Christopher A; Turatto, Massimo; Hillebrandt, Wolfgang

Description

Evidence of high-velocity features (HVFs) such as those seen in the near-maximum spectra of some Type la supernovae (SNe Ia; e.g., SN 2000cx) has been searched for in the available SN Ia spectra observed earlier than 1 week before B maximum. Recent observational efforts have doubled the number of SNe Ia with very early spectra. Remarkably, all SNe Ia with early data (seven in our Research Training Network sample and 10 from other programs) show signs of such features, to a greater or lesser...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
URI: http://hdl.handle.net/1885/80199
Source: Astrophysical Journal, The
DOI: 10.1086/429874

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