Detection of variable VHE γ-ray emission from the extra-galactic γ-ray binary LMC P3
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 ai...
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| Main Authors: | , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
02 March 2018
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| In: |
Astronomy and astrophysics
Year: 2018, Volume: 610 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201732426 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1051/0004-6361/201732426 Verlag, Volltext: https://www.aanda.org/articles/aa/abs/2018/02/aa32426-17/aa32426-17.html 
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| Author Notes: | 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] |
| Summary: | 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. |
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| Item Description: | Gesehen am 18.06.2019 Im Titel wird gamma als griechischer Buchstabe dargestellt |
| Physical Description: | Online Resource |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201732426 |