Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024
The transient Galactic black hole candidate Swift J151857.0-572147 went through an outburst in 2024 March for the first time. Using publicly archived Insight-HXMT data, we have analyzed the timing and spectral properties of the source. We have extracted the properties of the quasiperiodic oscillatio...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/add699 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849430771860766720 |
|---|---|
| author | Kaushik Chatterjee S. Pujitha Suribhatla Santanu Mondal Chandra B. Singh |
| author_facet | Kaushik Chatterjee S. Pujitha Suribhatla Santanu Mondal Chandra B. Singh |
| author_sort | Kaushik Chatterjee |
| collection | DOAJ |
| description | The transient Galactic black hole candidate Swift J151857.0-572147 went through an outburst in 2024 March for the first time. Using publicly archived Insight-HXMT data, we have analyzed the timing and spectral properties of the source. We have extracted the properties of the quasiperiodic oscillations (QPOs) by fitting the power density spectrum, which inferred that the QPOs are of type C. We have detected QPOs up to ∼48 keV using an energy dependence study of the QPOs. A high-frequency QPO was not observed during this period. We also conclude that the oscillations of the shock in transonic advective accretion flows may be the possible reason for the origin of the QPOs. In the broad energy band of 2–100 keV, simultaneous data from the three onboard instruments of Insight-HXMT were used to perform spectral analysis. Different combinations of models, including a broken power law, a multicolor disk blackbody, interstellar absorption, nonrelativistic reflection in both neutral and ionized medium, and relativistic reflection, were used to understand the spectral properties during the outburst. We discovered that at the beginning of the analysis period, the source was in an intermediate state and later transitioning toward the soft state based on the spectral parameters. It has a high hydrogen column density, which could be due to some local absorption by the source. |
| format | Article |
| id | doaj-art-8270a41e240a4c3d8f1b799aeef115c0 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-8270a41e240a4c3d8f1b799aeef115c02025-08-20T03:27:52ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198714410.3847/1538-4357/add699Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024Kaushik Chatterjee0https://orcid.org/0000-0002-6252-3750S. Pujitha Suribhatla1https://orcid.org/0009-0002-3317-5213Santanu Mondal2https://orcid.org/0000-0003-0793-6066Chandra B. Singh3https://orcid.org/0000-0002-7782-5719South-Western Institute For Astronomy Research, Yunnan University , University Town, Chenggong, Kunming 650500, People’s Republic of China ; mails.kc.physics@gmail.com, kaushik@ynu.edu.cnUniversity of Rome Tor Vergata , Via Cracovia, 90, 00133 Roma RM, Italy; Indian Institute of Astrophysics , II Block, Koramangala, Bengaluru 560034, Karnataka, IndiaIndian Institute of Astrophysics , II Block, Koramangala, Bengaluru 560034, Karnataka, IndiaSouth-Western Institute For Astronomy Research, Yunnan University , University Town, Chenggong, Kunming 650500, People’s Republic of China ; mails.kc.physics@gmail.com, kaushik@ynu.edu.cnThe transient Galactic black hole candidate Swift J151857.0-572147 went through an outburst in 2024 March for the first time. Using publicly archived Insight-HXMT data, we have analyzed the timing and spectral properties of the source. We have extracted the properties of the quasiperiodic oscillations (QPOs) by fitting the power density spectrum, which inferred that the QPOs are of type C. We have detected QPOs up to ∼48 keV using an energy dependence study of the QPOs. A high-frequency QPO was not observed during this period. We also conclude that the oscillations of the shock in transonic advective accretion flows may be the possible reason for the origin of the QPOs. In the broad energy band of 2–100 keV, simultaneous data from the three onboard instruments of Insight-HXMT were used to perform spectral analysis. Different combinations of models, including a broken power law, a multicolor disk blackbody, interstellar absorption, nonrelativistic reflection in both neutral and ionized medium, and relativistic reflection, were used to understand the spectral properties during the outburst. We discovered that at the beginning of the analysis period, the source was in an intermediate state and later transitioning toward the soft state based on the spectral parameters. It has a high hydrogen column density, which could be due to some local absorption by the source.https://doi.org/10.3847/1538-4357/add699X-ray binary starsBlack holesStellar accretion disksShocksCompact radiation sourcesCompact objects |
| spellingShingle | Kaushik Chatterjee S. Pujitha Suribhatla Santanu Mondal Chandra B. Singh Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024 The Astrophysical Journal X-ray binary stars Black holes Stellar accretion disks Shocks Compact radiation sources Compact objects |
| title | Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024 |
| title_full | Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024 |
| title_fullStr | Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024 |
| title_full_unstemmed | Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024 |
| title_short | Interpreting the Spectrotemporal Properties of the Black Hole Candidate Swift J151857.0-572147 during Its First Outburst in 2024 |
| title_sort | interpreting the spectrotemporal properties of the black hole candidate swift j151857 0 572147 during its first outburst in 2024 |
| topic | X-ray binary stars Black holes Stellar accretion disks Shocks Compact radiation sources Compact objects |
| url | https://doi.org/10.3847/1538-4357/add699 |
| work_keys_str_mv | AT kaushikchatterjee interpretingthespectrotemporalpropertiesoftheblackholecandidateswiftj1518570572147duringitsfirstoutburstin2024 AT spujithasuribhatla interpretingthespectrotemporalpropertiesoftheblackholecandidateswiftj1518570572147duringitsfirstoutburstin2024 AT santanumondal interpretingthespectrotemporalpropertiesoftheblackholecandidateswiftj1518570572147duringitsfirstoutburstin2024 AT chandrabsingh interpretingthespectrotemporalpropertiesoftheblackholecandidateswiftj1518570572147duringitsfirstoutburstin2024 |