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arXiv 1401.7701astro-ph.CO
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Subaru/XMM-Newton Deep Survey的Ia型超新星率

The Type Ia supernovae rate with Subaru/XMM-Newton Deep Survey

Jun E. Okumura, Yutaka Ihara, Mamoru Doi, Tomoki Morokuma, Reynald Pain, Tomonori Totani, Kyle Barbary, Naohiro Takanashi, Naoki Yasuda, Greg Aldering, Kyle Daw… 展开作者

Jun E. Okumura, Yutaka Ihara, Mamoru Doi, Tomoki Morokuma, Reynald Pain, Tomonori Totani, Kyle Barbary, Naohiro Takanashi, Naoki Yasuda, Greg Aldering, Kyle Dawson, Gerson Goldhaber, Isobel Hook, Chris Lidman, Saul Perlmutter, Anthony Spadafora, Nao Suzuki, Lifan Wang

摘要:

我们目前的测量率的高红移Ia型超新星来自斯巴鲁/XMM-牛顿深调查(SXDS)。我们在Subaru望远镜上使用Suprime-Cam进行了重复的深度成像观测,并在Subaru/XMM-Newton Deep Field中检测到1040个超过0.918 deg $^2$的可变物体。从成像观测,光曲线中观察到的$i'$带构造的所有对象,我们拟合所观察到的光曲线与模板光曲线。在SXDS探测到的1040个变星中,有39个在红移范围$0.2 < z < 1.4$以上的变星被光变曲线归类为Ia型超新星。这是迄今为止最远的超新星Ia速率测量。我们发现,Ia型超新星的速率增加到$z \sim 0.8$,然后可能在更高的红移变平。速率可以通过简单的幂律$r_V(z)=r_0(1+z)^α$与$r_0=0.20^{+0.52}_{-0.16}$(stat.)$^{+0.26}_{-0.07}$(系统)$\times 10^{-4} {\rm yr}^{-1}{\rm Mpc}^{-3}$和$α=2.04^{+1.84}_{-1.96}$(统计学)$^{+2.11}_{-0.86}$(系统)。

英文摘要:

We present measurements of the rates of high-redshift Type Ia supernovae derived from the Subaru/XMM-Newton Deep Survey (SXDS). We carried out repeat deep imaging observations with Suprime-Cam on the Subaru Telescope, and detected 1040 variable objects over 0.918 deg$^2$ in the Subaru/XMM-Newton Deep Field. From the imaging observations, light curves in the observed $i'$-band are constructed for all objects, and we fit the observed light curves with template light curves. Out of the 1040 variable objects detected by the SXDS, 39 objects over the redshift range $0.2 < z < 1.4$ are classified as Type Ia supernovae using the light curves. These are among the most distant SN Ia rate measurements to date. We find that the Type Ia supernova rate increase up to $z \sim 0.8$ and may then flatten at higher redshift. The rates can be fitted by a simple power law, $r_V(z)=r_0(1+z)^α$ with $r_0=0.20^{+0.52}_{-0.16}$(stat.)$^{+0.26}_{-0.07}$(syst.)$\times 10^{-4} {\rm yr}^{-1}{\rm Mpc}^{-3}$, and $α=2.04^{+1.84}_{-1.96}$(stat.)$^{+2.11}_{-0.86}$(syst.).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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