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Are Centaurus A and M87 TeV gamma-ray sources?
Bai JM(白金明)1,2; Lee, MG1; Bai, JM (reprint author), Seoul Natl Univ, Astron Program, SEES, Seoul 151742, South Korea.
Source PublicationASTROPHYSICAL JOURNAL
2001-03-10
Volume549Issue:2Pages:L173-L177
DOI10.1086/319177
Contribution Rank第2完成单位
Indexed BySCI
KeywordBl Lacertae Objects : General Gamma Rays : Theory Galaxies : Individual (Centaurus a Radiation Mechanisms : Nonthermal M87) X-rays : Galaxies
AbstractIn this Letter, we identify Cen A and M87, two nearby Fanaroff-Riley class I (FR I) radio galaxies with high-energy-peaked BL Lac (HBL)-like objects by investigating their spectral energy distributions (SEDs). The SED peak of Cen A at similar to 150 keV, which was generally believed to be the peak of inverse Compton emission as in the case of 3C 273, is found to be actually the peak of synchrotron emission. The synchrotron emission of M87 peaks in the far-UV band. We summarize the properties of gamma -ray-loud blazars, especially those of TeV BL Lac objects, and generalize them to HBL-like FR I radio galaxies according to the unified scheme of BL Lac objects and FR I radio galaxies. We infer that Cen A may have a peak in its Compton component power output at similar to1 TeV and that M87 may have a Compton emission peak at similar to0.1 TeV. For Cen A, the estimated TeV gamma -ray flux during outburst is F(0.25-30 TeV) = 6.4 x 10(-9) ergs cm(-2) s(-1), and for M87, F(0.25-30 TeV) = 1.1 x 10(-11) ergs cm(-2) s(-1). Both fluxes are detectable by TeV detectors available today, and hence Cen A and M87 are TeV gamma -ray source candidates. By investigating the long-term variability, we predict that Cen A will undergo an outburst in the near future and will be detectable at the TeV gamma -ray energy range using the CANGAROO and the German-French-Italian experiment HESS TeV gamma -ray telescopes.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2001-03-26
WOS IDWOS:000167830900005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBL LACERTAE OBJECT ; ACTIVE GALACTIC NUCLEI ; MULTIWAVELENGTH OBSERVATIONS ; EGRET OBSERVATIONS ; OSSE OBSERVATIONS ; UNIFIED SCHEMES ; RADIO GALAXIES ; EMISSION ; JET ; BLAZARS
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Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6940
Collection星系研究组
Corresponding AuthorBai, JM (reprint author), Seoul Natl Univ, Astron Program, SEES, Seoul 151742, South Korea.
Affiliation1.Astronomy Program, SEES, Seoul National University, Seoul 151-742, Korea
2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kumming 650011, China; and National Astronomical Observatories, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Bai JM,Lee, MG,Bai, JM . Are Centaurus A and M87 TeV gamma-ray sources?[J]. ASTROPHYSICAL JOURNAL,2001,549(2):L173-L177.
APA Bai JM,Lee, MG,&Bai, JM .(2001).Are Centaurus A and M87 TeV gamma-ray sources?.ASTROPHYSICAL JOURNAL,549(2),L173-L177.
MLA Bai JM,et al."Are Centaurus A and M87 TeV gamma-ray sources?".ASTROPHYSICAL JOURNAL 549.2(2001):L173-L177.
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