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arXiv 1804.04039astro-ph.GA
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J-PLUS:测量附近宇宙中的${\rm H}α$发射线通量

J-PLUS: measuring ${\rm H}α$ emission line fluxes in the nearby universe

R. Logroño-García, G. Vilella-Rojo, C. López-Sanjuan, J. Varela, K. Viironen, D. J. Muniesa, A. J. Cenarro, D. Cristóbal-Hornillos, A. Ederoclite, A. Marín-Fran… 展开作者

R. Logroño-García, G. Vilella-Rojo, C. López-Sanjuan, J. Varela, K. Viironen, D. J. Muniesa, A. J. Cenarro, D. Cristóbal-Hornillos, A. Ederoclite, A. Marín-Franch, M. Moles, H. Vázquez Ramió, S. Bonoli, L. A. Díaz-García, A. Orsi, I. San Roman, S. Akras, A. L. Chies-Santos, P. R. T. Coelho, S. Daflon, M. V. Costa-Duarte, R. Dupke, L. Galbany, R. M. González Delgado, J. A. Hernandez-Jimenez, R. Lopes de Oliveira, C. Mendes de Oliveira, I. Oteo, D. R. Gonçalves, M. Sánchez-Portal, L. Schmidtobreick, L. Sodré

摘要:

在本文中,我们的目的是验证一种方法,旨在提取的Halpha发射线通量从J-PLUS光度数据。J-PLUS是一个多窄带滤波器测量,使用2 deg 2视场的T80 Cam相机,安装在西班牙特鲁埃尔OAJ的JAST/T80望远镜上。12个J-PLUS波段的信息,包括J 0660窄带滤波器位于静止帧Halpha,用于超过42 deg 2提取去红和[NII]净化Halpha发射线通量的46个恒星形成区域与以前的SDSS和/或CALIFA光谱信息。推断的J-PLUS光度计Halpha通量与光谱数据获得的通量的一致性是显著的,中值比较比R = 1.05 +-0.25。这表明,它是可以从J-PLUS光度数据检索可靠的α发射线通量。完成后,J-PLUS数据集的面积预计将达到数千平方度,将允许研究附近宇宙中的几个恒星形成科学案例,因为z < 0.015的附近星系的空间分辨恒星形成率,以及它如何受到环境,形态或核活动的影响。作为一个说明性的例子,密切的一对相互作用的星系NGC 3994和NGC 3995的分析,发现恒星形成率的增强不仅在中心,而且在外部的盘NGC 3994。

英文摘要:

In the present paper we aim to validate a methodology designed to extract the Halpha emission line flux from J-PLUS photometric data. J-PLUS is a multi narrow-band filter survey carried out with the 2 deg2 field of view T80Cam camera, mounted on the JAST/T80 telescope in the OAJ, Teruel, Spain. The information of the twelve J-PLUS bands, including the J0660 narrow-band filter located at rest-frame Halpha, is used over 42 deg2 to extract de-reddened and [NII] decontaminated Halpha emission line fluxes of 46 star-forming regions with previous SDSS and/or CALIFA spectroscopic information. The agreement of the inferred J-PLUS photometric Halpha fluxes and those obtained with spectroscopic data is remarkable, with a median comparison ratio R = 1.05 +- 0.25. This demonstrates that it is possible to retrieve reliable Halpha emission line fluxes from J-PLUS photometric data. With an expected area of thousands of square degrees upon completion, the J-PLUS dataset will allow the study of several star formation science cases in the nearby universe, as the spatially resolved star formation rate of nearby galaxies at z < 0.015, and how it is influenced by the environment, morphology or nuclear activity. As an illustrative example, the close pair of interacting galaxies NGC3994 and NGC3995 is analyzed, finding an enhancement of the star formation rate not only in the center, but also in outer parts of the disk of NGC3994.

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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