Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae
Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae
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DOI：
10.1093/pasj/62.1.19
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发表时间：
2009-11
影响因子：
2.3
通讯作者：
T. Morokuma;K. Tokita;C. Lidman;M. Doi;N. Yasuda;G. Aldering;R. Amanullah;K. Barbary;K. Dawson;V. Fadeyev;H. Fakhouri;G. Goldhaber;A. Goobar;T. Hattori;J. Hayano;I. Hook;D. Howell;H. Furusawa;Y. Ihara;N. Kashikawa;R. Knop;K. Konishi;J. Meyers;T. Oda;R. Pain;S. Perlmutter;D. Rubin;A. Spadafora;N. Suzuki;N. Takanashi;T. Totani;H. Utsunomiya;Lifan Wang
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文献类型：
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作者：
T. Morokuma;K. Tokita;C. Lidman;M. Doi;N. Yasuda;G. Aldering;R. Amanullah;K. Barbary;K. Dawson;V. Fadeyev;H. Fakhouri;G. Goldhaber;A. Goobar;T. Hattori;J. Hayano;I. Hook;D. Howell;H. Furusawa;Y. Ihara;N. Kashikawa;R. Knop;K. Konishi;J. Meyers;T. Oda;R. Pain;S. Perlmutter;D. Rubin;A. Spadafora;N. Suzuki;N. Takanashi;T. Totani;H. Utsunomiya;Lifan Wang
我们目前的光谱高红移超新星（SNe）的斯巴鲁低分辨率光学摄谱仪，FOCAS。这些SNe是在斯巴鲁的Suprime-Cam、加拿大-法国-夏威夷望远镜的CFH 12 k相机和哈勃太空望远镜的高级勘测相机的SN勘测中发现的。这些超新星巡天特别针对z > 1的Ia型超新星（SNe Ia）。从39个候选者的光谱中，我们获得了32个候选者的红移，并在光谱上确定了7个活跃的候选者可能是SNe Ia，其中包括z = 1.35的一个，这是用地面望远镜光谱确认的最遥远的SNa。另外4个候选者从其宿主星系的分光光度特性被确定为可能的SNe la。有7个候选星系不是超新星la，要么是其他类型的超新星，要么是活动星系核。当在最大光的一周内观察到SNe la时，我们发现我们可以用光谱识别其中的大多数，直到z = 1.1。除了这个红移之外，很少有候选者被光谱鉴定为超新星Ia。目前这一代的超红敏、无条纹CCD将把这个红移极限推得更高。
We present spectra of high-redshift supernovae (SNe) that were taken with the Subaru low-resolution optical spectrograph, FOCAS. These SNe were found in SN surveys with Suprime-Cam on Subaru, the CFH12k camera on the Canada-France-Hawaii Telescope, and the Advanced Camera for Surveys on the Hubble Space Telescope. These SN surveys specifically targeted z > 1 Type la supernovae (SNe Ia). From the spectra of 39 candidates, we obtained redshifts for 32 candidates and spectroscopically identified 7 active candidates as probable SNe Ia, including one at z = 1.35, which is the most distant SN la to be spectroscopically confirmed with a ground-based telescope. An additional 4 candidates were identified as likely SNe la from the spectrophotometric properties of their host galaxies. Seven candidates are not SNe la, either being SNe of another type or active galactic nuclei. When SNe la were observed within one week of the maximum light, we found that we could spectroscopically identify most of them up to z = 1.1. Beyond this redshift, very few candidates were spectroscopically identified as SNe Ia. The current generation of super red-sensitive, fringe-free CCDs will push this redshift limit higher.