| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Early Phase Obserbations of Extermely Luminous Type Ia Supernova 2009dc |
|
言語 |
en |
| 作成者 |
Yamanaka, Masayuki
Kawabata, Koji S.
Kinugasa, Kenzo
Tanaka, Masaomi
Imada, Akira
Maeda, Keiichi
Nomoto, Ken'ichi
Arai, Akira
Chiyonobu, Shingo
Fukazawa, Yasushi
Hashimoto, Osamu
Honda, Satoshi
Ikejiri, Yuki
Itoh, Ryosuke
Kamata, Yukiko
Kawai, Nobuyuki
Komatsu, Tomoyuki
Konishi, Kohki
Kuroda, Daisuke
Miyamoto, Hisashi
Miyazaki, Satoshi
Nagae, Osamu
Nakaya, Hidehiko
Ohsugi, Takashi
Omodaka, Toshihiro
Sakai, Nobuyuki
Sasada, Mahito
Suzuki, Mariko
Taguchi, Hikaru
Takahashi, Hidenori
Tanaka, Hiroyuki
Uemura, Makoto
Yamashita, Takuya
Yanagisawa, Kenshi
Yoshida, Michitoshi
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
supernovae |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
general |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
supernovae |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
individual (SN 2009dc, SNe 2003fg, 2006gz) |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
440 |
| 内容記述 |
|
|
内容記述 |
We present early phase observations in optical and near-infrared wavelengths for the extremely luminous Type Ia supernova (SN Ia) 2009dc. The decline rate of the light curve is Delta m(15)(B) = 0.65 +/- 0.03, which is one of the slowest among SNe Ia. The peak V-band absolute magnitude is estimated to be M-V = -19.90 +/- 0.15 mag if no host extinction is assumed. It reaches M-V = -20.19 +/- 0.19 mag if we assume the host extinction of A(V) = 0.29 mag. SN 2009dc belongs to the most luminous class of SNe Ia, like SNe 2003fg and 2006gz. Our JHK(s)-band photometry shows that this SN is also one of the most luminous SNe Ia in near-infrared wavelengths. We estimate the ejected Ni-56 mass of 1.2 +/- 0.3 M-circle dot for the no host extinction case (and of 1.6 +/- 0.4 M-circle dot for the host extinction of A(V) = 0.29 mag). The C II lambda 6580 absorption line remains visible until a week after the maximum brightness, in contrast to its early disappearance in SN 2006gz. The line velocity of Si II lambda 6355 is about 8000 km s(-1) around the maximum, being considerably slower than that of SN 2006gz. The velocity of the C II line is similar to or slightly less than that of the Si II line around the maximum. The presence of the carbon line suggests that the thick unburned C+O layer remains after the explosion. Spectropolarimetric observations by Tanaka et al. indicate that the explosion is nearly spherical. These observational facts suggest that SN 2009dc is a super-Chandrasekhar mass SN Ia. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
IOP Publishing Ltd |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AO |
|
出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1088/0004-637X/707/2/L118 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1088/0004-637X/707/2/L118 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0004-637X |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00553264 |
| 開始ページ |
|
|
開始ページ |
118 |
| 書誌情報 |
Astrophysical Journal Letters
Astrophysical Journal Letters
巻 707,
号 2,
p. 118-122,
発行日 2009-12-20
|
| 旧ID |
29240 |
ApJL_707_118.pdf (246.4 KB)
