TY - JOUR
T1 - ESC observations of SN 2005cf II. Optical spectroscopy and the high-velocity features
AU - Garavini, G.
AU - Nobili, S.
AU - Taubenberger, S.
AU - Pastorello, A.
AU - Elias-Rosa, N.
AU - Stanishev, V.
AU - Blanc, G.
AU - Benetti, S.
AU - Goobar, A.
AU - Mazzali, P. A.
AU - Sanchez, S. F.
AU - Salvo, M.
AU - Schmidt, B. P.
AU - Hillebrandt, W.
PY - 2007/8
Y1 - 2007/8
N2 - The ESC-RTN optical spectroscopy data set for SN 2005cf is presented and analyzed. The observations range from -11.6 and +77.3 days with respect to B-band maximum light. The evolution of the spectral energy distribution of SN 2005cf is characterized by the presence of high velocity Si II and Ca II features. SYNOW synthetic spectra are used to investigate the ejecta geometry of silicon. Based on the synthetic spectra, the Si II high-velocity feature appears detached at 19500 km s-1. We also securely establish the presence of such a feature in SN 1990N, SN 1994D, SN 2002er, and SN 2003du. In a morphological study both the Ca II IR triplet and H&K absorption lines of SN 2005cf show high-velocity features centered around 24000 km s-1. When compared with other type Ia SNe based on the scheme presented in Benetti et al. (2005, ApJ, 623, 1011), SN 2005cf definitely belongs to the LVG group.
AB - The ESC-RTN optical spectroscopy data set for SN 2005cf is presented and analyzed. The observations range from -11.6 and +77.3 days with respect to B-band maximum light. The evolution of the spectral energy distribution of SN 2005cf is characterized by the presence of high velocity Si II and Ca II features. SYNOW synthetic spectra are used to investigate the ejecta geometry of silicon. Based on the synthetic spectra, the Si II high-velocity feature appears detached at 19500 km s-1. We also securely establish the presence of such a feature in SN 1990N, SN 1994D, SN 2002er, and SN 2003du. In a morphological study both the Ca II IR triplet and H&K absorption lines of SN 2005cf show high-velocity features centered around 24000 km s-1. When compared with other type Ia SNe based on the scheme presented in Benetti et al. (2005, ApJ, 623, 1011), SN 2005cf definitely belongs to the LVG group.
KW - Stars: supernovae: general
KW - Stars: supernovae: individual: SN 2005cf
UR - http://www.scopus.com/inward/record.url?scp=34548025864&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20066971
DO - 10.1051/0004-6361:20066971
M3 - Article
SN - 0004-6361
VL - 471
SP - 527
EP - 535
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 2
ER -