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Article: Basic properties of gamma-ray loud blazars

TitleBasic properties of gamma-ray loud blazars
Authors
KeywordsGalaxies: BL Lacertae objects: general
Galaxies: jets
Galaxies: quasars: general
Gamma rays: observations
Issue Date1999
PublisherEDP Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 1999, v. 352 n. 1, p. 32-38 How to Cite?
AbstractIn this paper, a method is proposed to determine the basic properties of γ-ray loud blazars, among them the central black hole mass, M, the Doppler factor, δ, the propagation angle of the γ-rays with respect to the symmetric axis of a two-temperature accretion disk, Φ, and the distance (i.e. the height above the accretion disk), d at which the γ-rays are created, for seven γ-ray loud blazars with available GeV variability timescales and in which the absorption effect of a γ-ray and the beaming effect have been taken into account. Our results indicate that, if we take the intrinsic γ-ray luminosity to be λ times the Eddington luminosity, Lin γ = λLEdd., the masses of the blazars are in the range of (4 ∼ 83) × 107 M⊙ (λ = 1.0) or (6 ∼ 131) × 107 M⊙ (λ = 0.1), the Doppler factors (δ) lie in the range of 0.57 to 3.72 (λ = 1.0) or 0.79 to 5.33 (λ = 0.1), the angle (Φ) is in the range of 14° to 43° (λ = 1.0) or 13° to 39° (λ = 0.1), and the distance (d) is in the range of 28Rg to 411Rg (λ = 1.0) or 26Rg to 366Rg (λ = 0.1). For 3C279, the case of a uniformly-bright disk is also adopted to determine the basic parameters, which are compared with those obtained for a two-temperature disk as well as those obtained by Becker & Kafatos (1995). Our model results are independent of γ-ray emission mechanisms but they do depend on the X-ray emission mechanism of the accretion disk.
Persistent Identifierhttp://hdl.handle.net/10722/80663
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
References

 

DC FieldValueLanguage
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorFan, JHen_HK
dc.contributor.authorZhang, Len_HK
dc.date.accessioned2010-09-06T08:08:55Z-
dc.date.available2010-09-06T08:08:55Z-
dc.date.issued1999en_HK
dc.identifier.citationAstronomy And Astrophysics, 1999, v. 352 n. 1, p. 32-38en_HK
dc.identifier.issn0004-6361en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80663-
dc.description.abstractIn this paper, a method is proposed to determine the basic properties of γ-ray loud blazars, among them the central black hole mass, M, the Doppler factor, δ, the propagation angle of the γ-rays with respect to the symmetric axis of a two-temperature accretion disk, Φ, and the distance (i.e. the height above the accretion disk), d at which the γ-rays are created, for seven γ-ray loud blazars with available GeV variability timescales and in which the absorption effect of a γ-ray and the beaming effect have been taken into account. Our results indicate that, if we take the intrinsic γ-ray luminosity to be λ times the Eddington luminosity, Lin γ = λLEdd., the masses of the blazars are in the range of (4 ∼ 83) × 107 M⊙ (λ = 1.0) or (6 ∼ 131) × 107 M⊙ (λ = 0.1), the Doppler factors (δ) lie in the range of 0.57 to 3.72 (λ = 1.0) or 0.79 to 5.33 (λ = 0.1), the angle (Φ) is in the range of 14° to 43° (λ = 1.0) or 13° to 39° (λ = 0.1), and the distance (d) is in the range of 28Rg to 411Rg (λ = 1.0) or 26Rg to 366Rg (λ = 0.1). For 3C279, the case of a uniformly-bright disk is also adopted to determine the basic parameters, which are compared with those obtained for a two-temperature disk as well as those obtained by Becker & Kafatos (1995). Our model results are independent of γ-ray emission mechanisms but they do depend on the X-ray emission mechanism of the accretion disk.en_HK
dc.languageengen_HK
dc.publisherEDP Sciences. The Journal's web site is located at http://www.aanda.orgen_HK
dc.relation.ispartofAstronomy and Astrophysicsen_HK
dc.subjectGalaxies: BL Lacertae objects: generalen_HK
dc.subjectGalaxies: jetsen_HK
dc.subjectGalaxies: quasars: generalen_HK
dc.subjectGamma rays: observationsen_HK
dc.titleBasic properties of gamma-ray loud blazarsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-6361&volume=352&spage=32&epage=38&date=1999&atitle=Basic+Properties+of+Gamma-Ray+Loud+Blazarsen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0002965307en_HK
dc.identifier.hkuros47813en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0002965307&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume352en_HK
dc.identifier.issue1en_HK
dc.identifier.spage32en_HK
dc.identifier.epage38en_HK
dc.publisher.placeFranceen_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridFan, JH=7402794576en_HK
dc.identifier.scopusauthoridZhang, L=9432987500en_HK

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