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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F12%3A10127206%21RIV13-GA0-11320___
rdf:type
n13:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1051/0004-6361/201219906
dcterms:description
We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N 157B, located in the large Magellanic Cloud (LMC). Pulsars with high spin-down luminosity are found to power energised nebulae that emit gamma rays up to energies of several tens of TeV. N 157B is associated with PSR J0537-6910, which is the pulsar with the highest known spin-down luminosity. The High Energy Stereoscopic System telescope array observed this nebula on a yearly basis from 2004 to 2009 with a dead-time corrected exposure of 46 h. The gamma-ray spectrum between 600 GeV and 12 TeV is well-described by a pure power-law with a photon index of 2.8 +/- 0.2(stat) +/- 0.3(syst) and a normalisation at 1 TeV of (8.2 +/- 0.8(stat) +/- 2.5(syst)) x 10(-13) cm(-2) s(-1) TeV-1. A leptonic multi-wavelength model shows that an energy of about 4 x 10(49) erg is stored in electrons and positrons. The apparent efficiency, which is the ratio of the TeV gamma-ray luminosity to the pulsar's spin-down luminosity, 0.08% +/- 0.01%, is comparable to those of PWNe found in the Milky Way. The detection of a PWN at such a large distance is possible due to the pulsar's favourable spin-down luminosity and a bright infrared photon-field serving as an inverse-Compton-scattering target for accelerated leptons. By applying a calorimetric technique to these observations, the pulsar's birth period is estimated to be shorter than 10 ms. We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N 157B, located in the large Magellanic Cloud (LMC). Pulsars with high spin-down luminosity are found to power energised nebulae that emit gamma rays up to energies of several tens of TeV. N 157B is associated with PSR J0537-6910, which is the pulsar with the highest known spin-down luminosity. The High Energy Stereoscopic System telescope array observed this nebula on a yearly basis from 2004 to 2009 with a dead-time corrected exposure of 46 h. The gamma-ray spectrum between 600 GeV and 12 TeV is well-described by a pure power-law with a photon index of 2.8 +/- 0.2(stat) +/- 0.3(syst) and a normalisation at 1 TeV of (8.2 +/- 0.8(stat) +/- 2.5(syst)) x 10(-13) cm(-2) s(-1) TeV-1. A leptonic multi-wavelength model shows that an energy of about 4 x 10(49) erg is stored in electrons and positrons. The apparent efficiency, which is the ratio of the TeV gamma-ray luminosity to the pulsar's spin-down luminosity, 0.08% +/- 0.01%, is comparable to those of PWNe found in the Milky Way. The detection of a PWN at such a large distance is possible due to the pulsar's favourable spin-down luminosity and a bright infrared photon-field serving as an inverse-Compton-scattering target for accelerated leptons. By applying a calorimetric technique to these observations, the pulsar's birth period is estimated to be shorter than 10 ms.
dcterms:title
Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS
skos:prefLabel
Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with HESS
skos:notation
RIV/00216208:11320/12:10127206!RIV13-GA0-11320___
n13:predkladatel
n14:orjk%3A11320
n5:aktivita
n7:P n7:I n7:Z
n5:aktivity
I, P(GPP203/11/P363), Z(MSM0021620859)
n5:cisloPeriodika
1
n5:dodaniDat
n9:2013
n5:domaciTvurceVysledku
n10:6144063 n10:9283439
n5:druhVysledku
n18:J
n5:duvernostUdaju
n21:S
n5:entitaPredkladatele
n15:predkladatel
n5:idSjednocenehoVysledku
131462
n5:idVysledku
RIV/00216208:11320/12:10127206
n5:jazykVysledku
n6:eng
n5:klicovaSlova
HESS; with; 157B; nebula; wind; pulsar; extragalactic; emission; gamma-ray; Discovery
n5:klicoveSlovo
n8:wind n8:with n8:Discovery n8:nebula n8:pulsar n8:extragalactic n8:157B n8:emission n8:gamma-ray n8:HESS
n5:kodStatuVydavatele
DE - Spolková republika Německo
n5:kontrolniKodProRIV
[E6E01AD8F550]
n5:nazevZdroje
Astronomy and Astrophysics
n5:obor
n12:BF
n5:pocetDomacichTvurcuVysledku
2
n5:pocetTvurcuVysledku
197
n5:projekt
n17:GPP203%2F11%2FP363
n5:rokUplatneniVysledku
n9:2012
n5:svazekPeriodika
545
n5:tvurceVysledku
Acero, F. Brucker, J. Anton, G. Chadwick, P. M. Becherini, Y. Rob, Ladislav Biteau, J. Charbonnier, A. Bochow, A. Brun, F. Akhperjanian, A. G. Boisson, C. Aharonian, F. Carrigan, S. Bernloehr, K. Balenderan, S. Cerruti, M. Cheesebrough, A. Birsin, E. Bolmont, J. Buesching, I. Nedbal, Dalibor Balzer, A. Barnacka, A. Brun, P. Bordas, P. Bulik, T. Cologna, G. Becker, J. Casanova, S. Abramowski, A. Chaves, R. C. G.
n5:wos
000309254900158
n5:zamer
n19:MSM0021620859
s:issn
0004-6361
s:numberOfPages
5
n20:doi
10.1051/0004-6361/201219906
n22:organizacniJednotka
11320