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从X射线到远红外波段多波长表征发光红外星系的光度成分。

Characterizing the luminosity components of luminous infrared galaxies in multi-wavelength from the X-ray to the far-infrared.

作者信息

Ali Abdallah A M, Gadallah Kamel A K, Shalabiea Osama M, Beheary Mohamed M

机构信息

Astronomy and Meteorology Department, Faculty of Science, Al-Azhar University, PO Box 11884, Nasr City, Cairo, Egypt.

Astronomy, Space Science and Meteorology Department, Faculty of Science, Cairo University, Giza, Egypt.

出版信息

Sci Rep. 2024 Oct 27;14(1):25648. doi: 10.1038/s41598-024-76203-5.

DOI:10.1038/s41598-024-76203-5
PMID:39465256
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11514313/
Abstract

We characterize luminosity components of Ultra/Luminous Infrared Galaxies (U/LIRGs) in multi-wavelength from the X-ray to far-infrared. A set of 63 AGN U/LIRGs was selected where these galaxies are powered by a central active galactic nucleus (AGN). Utilizing the X-CIGALE code, SEDs for these galaxies are carried out where their SEDs are fitted with observations. Accordingly, the physical parameters such as the stellar mass, the dust-to-gas mass ratio, and the star formation rate are calculated. The total luminosity and its decomposed components (stellar, AGN, X-ray) are also calculated. We characterized these luminosities in relative to the intrinsic luminosity and in relative to each other. As a function of the stellar mass, these luminosities reveal an increase with different correlation coefficients, showing a strong correlation. In correlation with the intrinsic AGN power, the stellar, AGN, and X-ray luminosities are strongly correlates in their variation to the intrinsic AGN luminosity, showing stronger correlations of AGN, and X-ray luminosities than those of the stellar one. In relationships between various luminosity components, both the stellar and X-ray luminosities reveal strong correlations with the AGN luminosity. On the other hand, the X-ray luminosity varies strongly with the stellar luminosity and moderately with IR luminosity. Compared to obscured AGN galaxies, both the stellar and AGN luminosities similarly vary with increasing the intrinsic power of the active nucleus but for obscured AGN they are faster in their variation than that of U/LIRG. These correlations may offer valuable insights to understand the physical properties and their relationships through the evolution of U/LIRGs.

摘要

我们从X射线到远红外的多波长角度对超亮/极亮红外星系（U/LIRGs）的光度成分进行了表征。我们挑选了一组63个由中央活跃星系核（AGN）提供能量的AGN U/LIRGs。利用X-CIGALE代码，对这些星系的光谱能量分布（SEDs）进行了拟合，并与观测数据相匹配。据此，计算了诸如恒星质量、尘埃与气体质量比以及恒星形成率等物理参数。还计算了总光度及其分解成分（恒星、AGN、X射线）。我们从相对于固有光度以及相互之间的关系等方面对这些光度进行了表征。作为恒星质量的函数，这些光度呈现出不同的相关系数并随其增加，显示出很强的相关性。与固有AGN功率相关，恒星、AGN和X射线光度在相对于固有AGN光度的变化中呈现出强相关性，其中AGN和X射线光度的相关性比恒星光度更强。在各种光度成分之间的关系中，恒星和X射线光度均与AGN光度呈现出强相关性。另一方面，X射线光度随恒星光度变化强烈，随红外光度变化适中。与被遮挡的AGN星系相比，恒星和AGN光度都随着活跃星系核固有功率的增加而类似地变化，但对于被遮挡的AGN，它们的变化速度比U/LIRG更快。这些相关性可能为通过U/LIRGs的演化来理解其物理性质及其关系提供有价值的见解。

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