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Article: On the gamma-ray emission from Markarian 421

TitleOn the gamma-ray emission from Markarian 421
Authors
KeywordsBL Lacertae objects: general, Mkn 421
Gamma rays: theory
Radiation mechanisms: non-thermal
Issue Date1994
PublisherSpringer-Verlag. The Journal's web site is located at http://aa.springer.de/index.htm
Citation
Astronomy & Astrophysics, 1994, v. 288, p. 97-102 How to Cite?
AbstractGamma radiation in various energy ranges from 50 MeV to 10 GeV and even up to TeV has been detected from Markarian 421. We suggest that relativistic neutrons with energy approximately 1017 eV are expected to be produced in the acceleration region via the process of photopion production. We predict that ultra-high energy (approximately PeV) gamma rays will be emitted from Mkn 421 resulting from the decay of neutral pions which are produced by collisions between the ultra-high energy neutrons and blobs of material ejected from the accretion disk of the supermassive blackhole. At the same time, the decay of charged pions can eventually decay to produce electrons and positrons, which radiate synchrotron radiation in various energy ranges from TeV to 50 MeV. Comparison with the observed data and model results and the implications to other active galactic nuclei (AGNs) are discussed in the text.
Persistent Identifierhttp://hdl.handle.net/10722/80613
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446

 

DC FieldValueLanguage
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorDing, WKYen_HK
dc.date.accessioned2010-09-06T08:08:23Z-
dc.date.available2010-09-06T08:08:23Z-
dc.date.issued1994en_HK
dc.identifier.citationAstronomy & Astrophysics, 1994, v. 288, p. 97-102en_HK
dc.identifier.issn0004-6361en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80613-
dc.description.abstractGamma radiation in various energy ranges from 50 MeV to 10 GeV and even up to TeV has been detected from Markarian 421. We suggest that relativistic neutrons with energy approximately 1017 eV are expected to be produced in the acceleration region via the process of photopion production. We predict that ultra-high energy (approximately PeV) gamma rays will be emitted from Mkn 421 resulting from the decay of neutral pions which are produced by collisions between the ultra-high energy neutrons and blobs of material ejected from the accretion disk of the supermassive blackhole. At the same time, the decay of charged pions can eventually decay to produce electrons and positrons, which radiate synchrotron radiation in various energy ranges from TeV to 50 MeV. Comparison with the observed data and model results and the implications to other active galactic nuclei (AGNs) are discussed in the text.-
dc.languageengen_HK
dc.publisherSpringer-Verlag. The Journal's web site is located at http://aa.springer.de/index.htmen_HK
dc.relation.ispartofAstronomy & Astrophysicsen_HK
dc.subjectBL Lacertae objects: general, Mkn 421-
dc.subjectGamma rays: theory-
dc.subjectRadiation mechanisms: non-thermal-
dc.titleOn the gamma-ray emission from Markarian 421en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1687-0980&volume=288&spage=97&epage=102&date=1994&atitle=On+the+g-ray+emission+from+MK421en_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.identifier.hkuros3260en_HK
dc.identifier.volume288-
dc.identifier.spage97-
dc.identifier.epage102-
dc.publisher.placeFrance-

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