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arXiv 1809.06381astro-ph.CO
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卡内基超新星计划:绝对校准和哈勃常数

The Carnegie Supernova Project: Absolute Calibration and the Hubble Constant

Christopher. R. Burns, Emilie Parent, M. M. Phillips, Maximillian Stritzinger, Kevin Krisciunas, Nicholas B. Suntzeff, Eric Y. Hsiao, Carlos Contreras, Jorge An… 展开作者

Christopher. R. Burns, Emilie Parent, M. M. Phillips, Maximillian Stritzinger, Kevin Krisciunas, Nicholas B. Suntzeff, Eric Y. Hsiao, Carlos Contreras, Jorge Anais, Luis Boldt, Luis Busta, Abdo Campillay, Sergio Castellon, Gaston Folatelli, Wendy L. Freedman, Consuelo Gonzalez, Mario Hamuy, Peter Heoflich, Wojtek Krzeminski, Barry F. Madore, Nidia Morrell, S. E. Persson, Miguel Roth, Francisco Salgado, Jacqueline Seron, Simon Torres

摘要:

我们提出了一个分析的最终数据发布的卡内基超新星项目I,专注于绝对校准的亮度下降率关系Ia型超新星(SNeIa)使用新的内在颜色关系的颜色拉伸参数,$s_{BV}$,使改进的尘埃消光校正。我们调查到什么程度的所谓的快速下降的SNeIa可以用来确定准确的河外距离。我们估计了亮度下降率关系中的内禀散射,发现它的范围从$\pm 0.13$等到$\pm 0.18$等,对波长没有明显的依赖性。利用SH 0 ES项目的造父变星数据(Riess等人,2016),SNIa距离尺度校准和哈勃常数估计使用我们的光学和近红外样本,这些结果进行比较,完全从近红外子样本确定。超新星的宿主星系质量的系统效应作为波长的函数进行了研究,并发现向红色波长减少,这表明这种效应可能是由于宿主的尘埃性质。利用从光学和近红外波长得到的尘埃消光的估计,并将其应用于H波段,我们得到了哈勃常数$H_0 = 73.2 \pm 2.3$ km/s/Mpc,而使用简单的$B-V$颜色校正应用于B波段产生$H_0 = 72.7 \pm 2.1$ km/s/Mpc。本文介绍了CSP-II样品SN 2012 ht和SN 2015 F的两个定标SNeIa的测光结果,并用于改进SNIa距离阶梯的定标。

英文摘要:

We present an analysis of the final data release of the Carnegie Supernova Project I, focusing on the absolute calibration of the luminosity-decline-rate relation for Type Ia supernovae (SNeIa) using new intrinsic color relations with respect to the color-stretch parameter, $s_{BV}$, enabling improved dust extinction corrections. We investigate to what degree the so-called fast-declining SNeIa can be used to determine accurate extragalactic distances. We estimate the intrinsic scatter in the luminosity-decline-rate relation, and find it ranges from $\pm 0.13$ mag to $\pm 0.18$ mag with no obvious dependence on wavelength. Using the Cepheid variable star data from the SH0ES project (Riess et al., 2016), the SNIa distance scale is calibrated and the Hubble constant is estimated using our optical and near-infrared sample, and these results are compared to those determined exclusively from a near-infrared sub-sample. The systematic effect of the supernova's host galaxy mass is investigated as a function of wavelength and is found to decrease toward redder wavelengths, suggesting this effect may be due to dust properties of the host. Using estimates of the dust extinction derived from optical and NIR wavelengths, and applying these to H band, we derive a Hubble constant $H_0 = 73.2 \pm 2.3$ km/s/Mpc, whereas using a simple $B-V$ color-correction applied to B band yields $H_0 = 72.7 \pm 2.1$ km/s/Mpc. Photometry of two calibrating SNeIa from the CSP-II sample, SN2012ht and SN2015F, is presented and used to improve the calibration of the SNIa distance ladder.

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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