Optical and near-infrared photometry of the Type Ia supernova 2000E in NGC 6951

被引:59
作者
Valentini, G
Di Carlo, E
Massi, F
Dolci, M
Arkharov, AA
Larionov, VM
Pastorello, A
Di Paola, A
Benetti, S
Cappellaro, E
Turatto, M
Pedichini, F
D'Alessio, F
Garatti, AC
Causi, GL
Speziali, R
Danziger, IJ
Tornambé, A
机构
[1] Osservatorio Astron Collurania Teramo, Ist Nazl Astrofis, I-64100 Teramo, Italy
[2] Osserv Astrofis Arcetri, Ist Nazl Astrofis, I-50125 Florence, Italy
[3] Cent Astron Observ Pulkovo, St Petersburg 196140, Russia
[4] St Petersburg State Univ, Astron Inst, St Petersburg, Russia
[5] Isaac Newton Inst Chile, St Petersburg Branch, St Petersburg, Russia
[6] Osserv Astron Padova, Ist Nazl Astrofis, I-35122 Padua, Italy
[7] Osserv Astron Roma, Ist Nazl Astrofis, I-00040 Rome, Italy
[8] Osserv Astron Capodimonte, Ist Nazl Astrofis, I-80191 Naples, Italy
[9] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy
[10] Osserv Astron Trieste, Ist Nazl Astrofis, I-34131 Trieste, Italy
关键词
galaxies : individual (NGC 6951); infrared : stars; supernovae : general; supernovae : individual (SN 2000E);
D O I
10.1086/377448
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present optical (UBVRI) and near-infrared (JHK) photometry, along with optical spectra, of the Type Ia supernova SN 2000E in the spiral galaxy NGC 6951. It was discovered by the staff of the Teramo Observatory during the monitoring of the SN 1999el. The observations span a time interval of 234 days in the optical and 134 days in the near-infrared (starting similar to 16 and similar to 7 days before maximum B light, respectively). Optical spectra are available from 6 days before maximum B light to 122 days after it. The photometric behavior of SN 2000E is remarkably similar to that of SN 1991T and SN 1992bc: it exhibits a Deltam(15)(B) = 0.94 mag, thus being classifiable as a slow-declining Type Ia supernova (SN) and showing the distinctive features of such a class of objects both in the visible and in the near-infrared. Spectroscopically, SN 2000E appears as a "normal'' Type Ia SN, like SN 1990N. We could constrain reddening [E(B-V) similar to 0.5 mag] and distance (mu0 similar to 32.14 mag) using a number of different methods. The bolometric luminosity curve of SN 2000E, which displays a bump at the epoch of the secondary near-infrared peak, allows a determination of the Ni-56 mass, amounting to 0.9 M-..
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页码:779 / 793
页数:15
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