Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst from 2018 March to October, showing evidence of a non-thermal particle population through its radio emission during this whole period. The combined resul...
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| Hauptverfasser: | , , , , , , , , , , , |
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| Körperschaften: | , , |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2022 September 23
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2022, Jahrgang: 517, Heft: 4, Pages: 4736-4751 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stac2686 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stac2686
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| Verfasserangaben: | Magic Collaboration, H.E.S.S. Collaboration, VERITAS Collaboration |
MARC
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| 100 | 1 | |a Abe, Hyuga |e VerfasserIn |0 (DE-588)1317650220 |0 (DE-627)1879528320 |4 aut | |
| 245 | 1 | 0 | |a Gamma-ray observations of MAXI J1820+070 during the 2018 outburst |c Magic Collaboration, H.E.S.S. Collaboration, VERITAS Collaboration |
| 264 | 1 | |c 2022 September 23 | |
| 300 | |b Illustrationen, Diagramme | ||
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| 500 | |a The Magic Collaboration: H. Abe, S. Abe [und viele weitere], The H.E.S.S. Collaboration: H. Abdalla, F. Aharonian, F. Ait Benkhali, K. Bernlöhr, S. Ghafourizadeh, J.A. Hinton, F. Jankowsky, I. Lypova, R. Marx, A. Quirrenbach, S. Steinmaßl, S.J. Wagner [und viele weitere], The VERITAS Collaboration: V. Bosch-Ramon [und weitere] | ||
| 500 | |a Gesehen am 30.01.2024 | ||
| 520 | |a MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst from 2018 March to October, showing evidence of a non-thermal particle population through its radio emission during this whole period. The combined results of 59.5 h of observations of the MAXI J1820+070 outburst with the H.E.S.S., MAGIC and VERITAS experiments at energies above 200 GeV are presented, together with Fermi-LAT data between 0.1 and 500 GeV, and multiwavelength observations from radio to X-rays. Gamma-ray emission is not detected from MAXI J1820+070, but the obtained upper limits and the multiwavelength data allow us to put meaningful constraints on the source properties under reasonable assumptions regarding the non-thermal particle population and the jet synchrotron spectrum. In particular, it is possible to show that, if a high-energy (HE) gamma-ray emitting region is present during the hard state of the source, its predicted flux should be at most a factor of 20 below the obtained Fermi-LAT upper limits, and closer to them for magnetic fields significantly below equipartition. During the state transitions, under the plausible assumption that electrons are accelerated up to ∼500 GeV, the multiwavelength data and the gamma-ray upper limits lead consistently to the conclusion that a potential HE and very-HE gamma-ray emitting region should be located at a distance from the BH ranging between 1011 and 1013 cm. Similar outbursts from low-mass X-ray binaries might be detectable in the near future with upcoming instruments such as CTA. | ||
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