Detection of variable VHE γ-ray emission from the extra-galactic γ-ray binary LMC P3

• Verfasst von: Abdalla, Hassan [VerfasserIn]
• Verfasst von: Eisenacher Glawion, Dorit [VerfasserIn]
• Verfasst von: Jankowsky, Felix [VerfasserIn]
• Verfasst von: Mohamed, Mahmoud [VerfasserIn]
• Verfasst von: Quirrenbach, Andreas [VerfasserIn]
• Verfasst von: Schwemmer, Stephanie [VerfasserIn]
• Verfasst von: Wagner, Stefan [VerfasserIn]
• Verfasst von: Hofmann, Werner [VerfasserIn]
• Verfasst von: Rieger, Frank M. [VerfasserIn]
• Titel: Detection of variable VHE γ-ray emission from the extra-galactic γ-ray binary LMC P3
• Körperschaft: H.E.S.S. Collaboration [VerfasserIn]
• Verf.angabe: H.E.S.S. Collaboration, H. Abdalla, D. Glawion, W. Hofmann, F. Jankowsky, M. Mohamed, A. Quirrenbach, F. Rieger, S. Schwemmer, S.J. Wagner [und weitere]
• E-Jahr: 2018
• Jahr: 02 March 2018
• Umfang: 8 S.
• Fussnoten: Gesehen am 18.06.2019 ; Im Titel wird gamma als griechischer Buchstabe dargestellt
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Ort Quelle: Les Ulis : EDP Sciences, 1969
• Jahr Quelle: 2018
• Band/Heft Quelle: 610(2018) Artikel-Nummer L17, 8 Seiten
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/201732426
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1666426202

Abstract

Recently, the high-energy (HE, 0.1-100 GeV) <i>γ<i/>-ray emission from the object LMC P3 in the Large Magellanic Cloud (LMC) has been discovered to be modulated with a 10.3-day period, making it the first extra-galactic <i>γ<i/>-ray binary.<i>Aim.<i/> This work aims at the detection of very-high-energy (VHE, >100 GeV) <i>γ<i/>-ray emission and the search for modulation of the VHE signal with the orbital period of the binary system.<i>Methods.<i/> LMC P3 has been observed with the High Energy Stereoscopic System (H.E.S.S.); the acceptance-corrected exposure time is 100 h. The data set has been folded with the known orbital period of the system in order to test for variability of the emission.<i>Results.<i/> VHE <i>γ<i/>-ray emission is detected with a statistical significance of 6.4 <i>σ<i/>. The data clearly show variability which is phase-locked to the orbital period of the system. Periodicity cannot be deduced from the H.E.S.S. data set alone. The orbit-averaged luminosity in the 1-10 TeV energy range is (1.4 ± 0.2) × 1035 erg s<sup>−1<sup/>. A luminosity of (5 ± 1) × 1035 erg s<sup>−1<sup/> is reached during 20% of the orbit. HE and VHE <i>γ<i/>-ray emissions are anti-correlated. LMC P3 is the most luminous <i>γ<i/>-ray binary known so far.