The radio/X-ray correlation and black hole fundamental plane for young radio sources: Implications for X-ray origin and accretion mode
- Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011 (China)
We find that the young radio sources (gigahertz-peaked spectrum and compact steep spectrum radio sources) follow in the radio/X-ray correlation with b=0.61±0.07 (L{sub R}∝L{sub X}{sup b}), and the fundamental plane of black hole activity with the form logL{sub R}=0.58{sub −0.03}{sup +0.03}logL{sub X}+0.42{sub −0.07}{sup +0.09}logM{sub BH}+13.83{sub −0.97}{sup +0.91} and the intrinsic scatter σ=0.29. The flatter coefficient between radio and X-ray bands denies the jet origin of the X-ray emission in these types of sources. Meanwhile, the higher ratio of X-ray luminosity to Eddington luminosity (L{sub X}/L{sub Edd}) suggests that the X-ray emission is produced by the hot corona coupling with the standard thin disk. The deviation with the radiative efficient fundamental plane proposed by Dong et al. is mainly due to the extended radio emission in young radio sources. This fundamental plane manifests that even the kiloparsec-scaled radio emission has a tight connection with the accretion process, and could be suitable for the radio-loud active galactic nuclei whose radio and X-ray emission are dominated by the extended jets and the radiative efficient accretion flow, respectively. Otherwise, the high-excitation galaxies and low-excitation galaxies do not have obvious distinctions in the radio/X-ray correlation and the fundamental plane.
- OSTI ID:
- 22887012
- Journal Information:
- Astrophysical Journal, Vol. 818, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Since 2009, the country of publication for this journal is the UK.; ISSN 0004-637X
- Country of Publication:
- United Kingdom
- Language:
- English
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