BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:High-energy and very high-energy gamma-ray emission from the magne
 tar SGR 1900+14 neighbourhood
DTSTART;VALUE=DATE-TIME:20201222T111000Z
DTEND;VALUE=DATE-TIME:20201222T113000Z
DTSTAMP;VALUE=DATE-TIME:20260419T003243Z
UID:indico-contribution-211@indico.bitp.kiev.ua
DESCRIPTION:Speakers: Vadym Voitsekhovskyi (Astronomical Observatory of Ta
 ras Shevchenko National University of Kyiv)\nMagnetar wind nebulae (MWNe)\
 , created by new-born millisecond magnetars\, and magnetar giant flares ar
 e PeVatron candidates and even potential sources of ultra high energy (E>1
 018 eV) cosmic rays (UHECRs). Nonthermal high-energy (HE\, E>100 MeV) and 
 very high-energy (VHE\, E>100 GeV) γ-ray emission from magnetars neighbou
 rhoods should be a promising signature of acceleration processes. We inves
 tigate a possibility of explaining HE and VHE γ-ray emission from the vic
 inity of the magnetar SGR 1900+14 by cosmic rays accelerated in a Supernov
 a remnant of a magnetar-related Supernova and/or in a MWN. Simulation of t
 he observed HE (the extended Fermi-LAT source 4FGL J1908.6+0915e) and VHE 
 (the extended H.E.S.S. source candidate HOTS J1907+091 and the point-like 
 HAWC TeV source 3HWC J1907+085) γ-ray emission\, spatially coincident wit
 h the magnetar SGR 1900+14\, was carried out in the framework of hadronic 
 (pp collisions with a subsequent pion decay) and leptonic (inverse Compton
  scattering of low energy background photons by ultrarelativistic electron
 s) models. We show that under reasonable assumptions about parameters of t
 he circumstellar medium the observed γ-ray emission of Fermi-LAT 4FGL J19
 08.6+0915e\, H.E.S.S. HOTSJ1907+091 and 3HWC J1907+085 sources may be expl
 ained or at least considerably contributed by a (still undetected) magneta
 r-connected Hypernova remnant and/or a MWN created by new-born millisecond
  magnetar with a large reserve of rotational energy Erot∼1052 erg.\n\nht
 tps://indico.bitp.kiev.ua/event/7/contributions/211/
LOCATION:Online meeting
URL:https://indico.bitp.kiev.ua/event/7/contributions/211/
END:VEVENT
END:VCALENDAR