Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line
Iron fluorescence emission lines from X-ray binaries and active galactic nuclei are important diagnostic tools for studying the physical processes near the event horizon of both the stellar-mass black holes in X-ray binaries and the supermassive black holes in active galactic nuclei. In this work, w...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acedff |
| _version_ | 1797682296867782656 |
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| author | Yuan Feng Ye-Fei Yuan Shuang-Nan Zhang |
| author_facet | Yuan Feng Ye-Fei Yuan Shuang-Nan Zhang |
| author_sort | Yuan Feng |
| collection | DOAJ |
| description | Iron fluorescence emission lines from X-ray binaries and active galactic nuclei are important diagnostic tools for studying the physical processes near the event horizon of both the stellar-mass black holes in X-ray binaries and the supermassive black holes in active galactic nuclei. In this work, we investigate the line profile of the relativistic broad iron lines from the cool accretion disk of a black hole due to the asymmetric illumination of a moving corona, which moves away from the disk with a relativistic velocity. Both the off-axis location and the radial velocity of the moving corona are considered. Our results clearly show that the illumination and the line profile are dependent on the position and velocity of the corona, since the disk region below the corona receives more flux, which is the most important factor affecting the line profiles. As expected, if the corona is close to the receding part of the rotating disk, the red peak is enhanced, while the blue peak is weakened in the broad line profile, and the central energy of the emission line is low. Conversely, if the corona is close to the approaching part of the disk, the blue peak is strong and the central energy of the emission line is high, even higher than the intrinsic energy of the emission line. Due to the beaming effect of the moving corona, the corona with high velocity illuminates the outer region of the disk, which leads to the red peak disappearing and there being only one blue peak in the profile of the emission line. |
| first_indexed | 2024-03-11T23:57:40Z |
| format | Article |
| id | doaj.art-f176bc0cddb043c78f91883f6455b081 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-11T23:57:40Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-f176bc0cddb043c78f91883f6455b0812023-09-18T10:29:33ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195515310.3847/1538-4357/acedffMoving Corona and the Line Profile of the Relativistic Broad Iron Emission LineYuan Feng0https://orcid.org/0000-0003-0554-9425Ye-Fei Yuan1https://orcid.org/0000-0002-7330-4756Shuang-Nan Zhang2https://orcid.org/0000-0001-5586-1017School of Astronomy and Space Science, University of Science and Technology of China , Hefei 230026, People’s Republic of China ; yfyuan@ustc.edu.cn; CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China , Hefei 230026, People’s Republic of ChinaSchool of Astronomy and Space Science, University of Science and Technology of China , Hefei 230026, People’s Republic of China ; yfyuan@ustc.edu.cn; CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China , Hefei 230026, People’s Republic of ChinaUniversity of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100049, People’s Republic of China ; zhangsn@ihep.ac.cn; Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaIron fluorescence emission lines from X-ray binaries and active galactic nuclei are important diagnostic tools for studying the physical processes near the event horizon of both the stellar-mass black holes in X-ray binaries and the supermassive black holes in active galactic nuclei. In this work, we investigate the line profile of the relativistic broad iron lines from the cool accretion disk of a black hole due to the asymmetric illumination of a moving corona, which moves away from the disk with a relativistic velocity. Both the off-axis location and the radial velocity of the moving corona are considered. Our results clearly show that the illumination and the line profile are dependent on the position and velocity of the corona, since the disk region below the corona receives more flux, which is the most important factor affecting the line profiles. As expected, if the corona is close to the receding part of the rotating disk, the red peak is enhanced, while the blue peak is weakened in the broad line profile, and the central energy of the emission line is low. Conversely, if the corona is close to the approaching part of the disk, the blue peak is strong and the central energy of the emission line is high, even higher than the intrinsic energy of the emission line. Due to the beaming effect of the moving corona, the corona with high velocity illuminates the outer region of the disk, which leads to the red peak disappearing and there being only one blue peak in the profile of the emission line.https://doi.org/10.3847/1538-4357/acedffX-ray binary starsBlack hole physicsHigh energy astrophysics |
| spellingShingle | Yuan Feng Ye-Fei Yuan Shuang-Nan Zhang Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line The Astrophysical Journal X-ray binary stars Black hole physics High energy astrophysics |
| title | Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line |
| title_full | Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line |
| title_fullStr | Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line |
| title_full_unstemmed | Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line |
| title_short | Moving Corona and the Line Profile of the Relativistic Broad Iron Emission Line |
| title_sort | moving corona and the line profile of the relativistic broad iron emission line |
| topic | X-ray binary stars Black hole physics High energy astrophysics |
| url | https://doi.org/10.3847/1538-4357/acedff |
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