LyC Galaxies with Ionizing Radiation Leakage: Properties in the Midinfrared Range Based on Data from the WISE Space Telescope

IF 0.5 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Kinematics and Physics of Celestial Bodies Pub Date : 2023-05-24 DOI:10.3103/S0884591323020022

I. Yu. Izotova, Yu. I. Izotov

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Abstract

The photometric characteristics in the midinfrared range of compact galaxies with ionizing radiation leakage (LyC galaxies) are studied to find relationships that would enable the quantitative assessment of the ionizing radiation that goes beyond the galaxy. In particular, the relationships between the color characteristics of galaxies according to data from the WISE space telescope and radiation fraction f_esc(LyC) in the Lyman continuum and radiation fraction f_esc(Ly_α) in the Ly_α line, which go beyond the galaxy, are investigated. The dependences of f_esc(LyC) and f_esc(Ly_α) on color index W1–W4 are established from the WISE space telescope data, where W1 and W4 are apparent stellar magnitudes at wavelengths of 3.4 and 22 μm, respectively. This makes color index W1–W4 a useful indicator for quantifying f_esc(LyC) and f_esc(Ly_α) in addition to the previously established some characteristics of LyC galaxies in the optical and ultraviolet ranges. Thus, the radiation of galaxies in the midinfrared range can be used to search for candidates for leaking LyC galaxies with the purpose of their further observations.

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具有电离辐射泄漏的LyC星系:基于WISE空间望远镜数据的中红外范围的特性

研究了具有电离辐射泄漏的致密星系(LyC星系)在中红外范围内的光度特征，以寻找能够定量评估星系外电离辐射的关系。特别地，根据WISE空间望远镜数据，研究了星系的颜色特征与Lyman连续统中的辐射分数fesc(LyC)和Lyα线中的辐射分数fesc(Lyα)之间的关系。利用WISE空间望远镜数据建立了fesc(LyC)和fesc(Lyα)对W1 - W4的依赖关系，其中W1和W4分别是波长为3.4和22 μm的视星等。这使得色指数W1-W4成为量化LyC (LyC)和Lyα (LyC)的一个有用的指标，以及之前确定的LyC星系在光学和紫外范围内的一些特征。因此，在中红外范围内的星系辐射可以用来寻找泄漏LyC星系的候选星系，以达到进一步观测的目的。

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来源期刊

Kinematics and Physics of Celestial Bodies ASTRONOMY & ASTROPHYSICS-

CiteScore

0.90

自引率

40.00%

发文量

审稿时长

>12 weeks

期刊介绍： Kinematics and Physics of Celestial Bodies is an international peer reviewed journal that publishes original regular and review papers on positional and theoretical astronomy, Earth’s rotation and geodynamics, dynamics and physics of bodies of the Solar System, solar physics, physics of stars and interstellar medium, structure and dynamics of the Galaxy, extragalactic astronomy, atmospheric optics and astronomical climate, instruments and devices, and mathematical processing of astronomical information. The journal welcomes manuscripts from all countries in the English or Russian language.