SN2003du: 480 days in the life of a normal type Ia supernova

被引:156
作者
Stanishev, V. [1 ]
Goobar, A.
Benetti, S.
Kotak, R.
Pignata, G.
Navasardyan, H.
Mazzali, P.
Amanullah, R.
Garavini, G.
Nobili, S.
Qiu, Y.
Elias-Rosa, N.
Ruiz-Lapuente, P.
Mendez, J.
Meikle, P.
Patat, F.
Pastorello, A.
Altavilla, G.
Gustafsson, M.
Harutyunyan, A.
Iijima, T.
Jakobsson, P.
Kichizhieva, M. V.
Lundqvist, P.
Mattila, S.
Melinder, J.
Pavlenko, E. P.
Pavlyuk, N. N.
Sollerman, J.
Tsvetkov, D. Yu.
Turatto, M.
Hillebrandt, W.
机构
[1] Stockholm Univ, Albanova Univ Ctr, Dept Phys, S-10691 Stockholm, Sweden
[2] Osserv Astron Padova, INAF, I-35122 Padua, Italy
[3] European So Observ, D-85748 Garching, Germany
[4] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland
[5] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile
[6] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy
[7] Max Planck Inst Astrophys, D-85741 Garching, Germany
[8] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
[9] Univ La Laguna, E-38206 Tenerife, Spain
[10] Univ Barcelona, Dept Astron, E-08028 Barcelona, Spain
[11] Isaac Newton Grp Telescopes, Santa Cruz De La Palma 38700, Canary Islands, Spain
[12] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England
[13] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark
[14] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark
[15] Tavrida State Univ, Simferopol, Ukraine
[16] Stockholm Univ, Albanova Univ Ctr, Dept Astron, S-10691 Stockholm, Sweden
[17] Crimean Astrophys Observ, UA-334413 Nauchnyi, Ukraine
[18] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia
关键词
stars : supernovae : general; stars : supernovae : individual : SN 2003du; methods : observational; techniques : photometric; techniques : spectroscopic;
D O I
10.1051/0004-6361:20066020
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Aims. We present a study of the optical and near-infrared (NIR) properties of the Type Ia Supernova (SNIa) 2003du. Methods. An extensive set of optical and NIR photometry and low-resolution long-slit spectra was obtained using a number of facilities. The observations started 13 days before B-band maximum light and continued for 480 days with exceptionally good time sampling. The optical photometry was calibrated through the S-correction technique. Results. The UBVRIJHK light curves and the color indices of SN2003du closely resemble those of normal SNe Ia. SN2003du reached a B-band maximum of 13.49 +/- 0.02 mag on JD2 452 766.38 +/- 0.5. We derive a B-band stretch parameter of 0.988 +/- 0.003, which corresponds to Delta m(15) = 1.02 +/- 0.05, indicative of a SNIa of standard luminosity. The reddening in the host galaxy was estimated by three methods, and was consistently found to be negligible. Using an updated calibration of the V and JHK absolute magnitudes of SNe Ia, we find a distance modulus mu = 32.79 +/- 0.15 mag to the host galaxy, UGC 9391. We measure a peak uvoir bolometric luminosity of 1.35(+/- 0.20) x 10(43) erg s(-1) and Arnett's rule implies that M-56Ni similar or equal to 0.68 +/- 0.14 M-circle dot of Ni-56 was synthesized during the explosion. Modeling of the uvoir bolometric light curve also indicates M-56Ni in the range 0.6- 0.8 M-.. The spectral evolution of SN2003du at both optical and NIR wavelengths also closely resembles normal SNe Ia. In particular, the Si II ratio at maximum R(Si II) = 0.22 +/- 0.02 and the time evolution of the blueshift velocities of the absorption line minima are typical. The pre-maximum spectra of SN2003du showed conspicuous high-velocity features in the Ca II H& K doublet and infrared triplet, and possibly in Si II lambda 6355, lines. We compare the time evolution of the profiles of these lines with other well-observed SNe Ia and we suggest that the peculiar pre-maximum evolution of Si II lambda 6355 line in many SNe Ia is due to the presence of two blended absorption components.
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收藏
页码:645 / U201
页数:21
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