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Gamma-ray observations of MAXI J1820+070 during the 2018 outburst

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  • معلومة اضافية
    • Contributors:
      Abe H.; Abe S.; Acciari V.A.; Aniello T.; Ansoldi S.; Antonelli L.A.; Arbet Engels A.; Arcaro C.; Artero M.; Asano K.; Baack D.; Babic A.; Baquero A.; De Almeida U.B.; Barrio J.A.; Batkovic I.; Baxter J.; Becerra Gonzalez J.; Bednarek W.; Bernardini E.; Bernardos M.; Berti A.; Besenrieder J.; Bhattacharyya W.; Bigongiari C.; Biland A.; Blanch O.; Bonnoli G.; Bosnjak Z.; Burelli I.; Busetto G.; Carosi R.; Carretero-Castrillo M.; Ceribella G.; Chai Y.; Chilingarian A.; Cikota S.; Colombo E.; Contreras J.L.; Cortina J.; Covino S.; D'Amico G.; D'Elia V.; Da Vela P.; Dazzi F.; De Angelis A.; De Lotto B.; Del Popolo A.; Delfino M.; Delgado J.; Delgado Mendez C.; Depaoli D.; Di Pierro F.; Di Venere L.; Dominis Prester D.; Donini A.; Dorner D.; Doro M.; Elsaesser D.; Emery G.; Fallah Ramazani V.; Farina L.; Fattorini A.; Font L.; Fruck C.; Fukami S.; Fukazawa Y.; Garcia Lopez R.J.; Garczarczyk M.; Gasparyan S.; Gaug M.; Giesbrecht Paiva J.G.; Giglietto N.; Giordano F.; Gliwny P.; Godinovic N.; Grau R.; Green D.; Green J.G.; Hadasch D.; Hahn A.; Hassan T.; Heckmann L.; Herrera J.; Hoang J.; Hrupec D.; Hutten M.; Imazawa R.; Inada T.; Iotov R.; Ishio K.; Jimenez Martinez I.; Jormanainen J.; Kerszberg D.; Kobayashi Y.; Kubo H.; Kushida J.; Lamastra A.; Lelas D.; Leone F.
    • الموضوع:
      2022
    • Collection:
      Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto)
    • نبذة مختصرة :
      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.
    • Relation:
      info:eu-repo/semantics/altIdentifier/wos/WOS:000898831500002; volume:517; issue:4; firstpage:4736; lastpage:4751; numberofpages:16; journal:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY; https://hdl.handle.net/2318/1888574; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145348890
    • الرقم المعرف:
      10.1093/mnras/stac2686
    • Rights:
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsbas.DFD60DE4