Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A
The nearby long-duration GRB 191019A recently detected by Swift lacks an associated supernova and belongs to a host galaxy with little star formation activity, suggesting that the origin of this burst is the result of a merger of two compact objects with dynamical interactions in a high-density medi...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad2205 |
| _version_ | 1797268559894675456 |
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| author | Suo-Ning Wang Hou-Jun Lü Yong Yuan Hao-Yu Yuan Jared Rice Meng-Hua Chen En-Wei Liang |
| author_facet | Suo-Ning Wang Hou-Jun Lü Yong Yuan Hao-Yu Yuan Jared Rice Meng-Hua Chen En-Wei Liang |
| author_sort | Suo-Ning Wang |
| collection | DOAJ |
| description | The nearby long-duration GRB 191019A recently detected by Swift lacks an associated supernova and belongs to a host galaxy with little star formation activity, suggesting that the origin of this burst is the result of a merger of two compact objects with dynamical interactions in a high-density medium of an active galactic nucleus. Given the potential motivation of this event, and given that it occurs in such a high-density environment, the ejecta–circumstellar medium (CSM) interaction cannot be ignored as possibly contributing to the kilonova emission. Here, we theoretically calculate the kilonova emission by considering the contribution of the ejecta–CSM interaction in a high-density environment. We find that the contribution to the kilonova emission from the ejecta–CSM interaction will dominate at a later time, and a smaller ejecta mass will have a stronger kilonova emission from the ejecta–CSM interaction. Moreover, we try to apply it to GRB 191019A, but we find that it is difficult to identify the possible kilonova emission from the observations, due to the contribution of the bright host galaxy. On the other hand, less injected mass (less than M _ej = 2 × 10 ^−5 M _⊙ ) will be required if one can detect the kilonova emission associated with a GRB 191019A–like event in the future. The r -process-powered and spin energy contributions from the magnetar are also discussed. |
| first_indexed | 2024-04-25T01:34:25Z |
| format | Article |
| id | doaj.art-58cae327423f4b939c6069325d809b71 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-04-25T01:34:25Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-58cae327423f4b939c6069325d809b712024-03-08T10:20:44ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01963215610.3847/1538-4357/ad2205Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019ASuo-Ning Wang0Hou-Jun Lü1https://orcid.org/0000-0001-6396-9386Yong Yuan2Hao-Yu Yuan3Jared Rice4Meng-Hua Chen5https://orcid.org/0000-0001-8406-8683En-Wei Liang6https://orcid.org/0000-0002-7044-733XGuangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University , Nanning 530004, People's Republic of China ; lhj@gxu.edu.eduGuangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University , Nanning 530004, People's Republic of China ; lhj@gxu.edu.eduSchool of Physics Science And Technology, Wuhan University , No.299 Bayi Road, 430072, Wuhan, Hubei, People's Republic of ChinaSchool of Physics, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of ChinaDepartment of Mathematics and Physical Science, Southwestern Adventist University , Keene, TX 76059, USAGuangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University , Nanning 530004, People's Republic of China ; lhj@gxu.edu.eduGuangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University , Nanning 530004, People's Republic of China ; lhj@gxu.edu.eduThe nearby long-duration GRB 191019A recently detected by Swift lacks an associated supernova and belongs to a host galaxy with little star formation activity, suggesting that the origin of this burst is the result of a merger of two compact objects with dynamical interactions in a high-density medium of an active galactic nucleus. Given the potential motivation of this event, and given that it occurs in such a high-density environment, the ejecta–circumstellar medium (CSM) interaction cannot be ignored as possibly contributing to the kilonova emission. Here, we theoretically calculate the kilonova emission by considering the contribution of the ejecta–CSM interaction in a high-density environment. We find that the contribution to the kilonova emission from the ejecta–CSM interaction will dominate at a later time, and a smaller ejecta mass will have a stronger kilonova emission from the ejecta–CSM interaction. Moreover, we try to apply it to GRB 191019A, but we find that it is difficult to identify the possible kilonova emission from the observations, due to the contribution of the bright host galaxy. On the other hand, less injected mass (less than M _ej = 2 × 10 ^−5 M _⊙ ) will be required if one can detect the kilonova emission associated with a GRB 191019A–like event in the future. The r -process-powered and spin energy contributions from the magnetar are also discussed.https://doi.org/10.3847/1538-4357/ad2205Gamma-ray bursts |
| spellingShingle | Suo-Ning Wang Hou-Jun Lü Yong Yuan Hao-Yu Yuan Jared Rice Meng-Hua Chen En-Wei Liang Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A The Astrophysical Journal Gamma-ray bursts |
| title | Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A |
| title_full | Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A |
| title_fullStr | Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A |
| title_full_unstemmed | Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A |
| title_short | Ejecta–Circumstellar Medium Interaction in High-density Environment Contribution to Kilonova Emission: Application to GRB 191019A |
| title_sort | ejecta circumstellar medium interaction in high density environment contribution to kilonova emission application to grb 191019a |
| topic | Gamma-ray bursts |
| url | https://doi.org/10.3847/1538-4357/ad2205 |
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