The luminosity correlation analysis for Fermi blazars
Abstract
In this paper, multiwavelength chromatic luminosity at radio (log L R), optical (log LO), X-ray (log L X), and γ -rays (log L_{γ }) for a sample of 442 Fermi blazars with known redshifts are collected from Fan et al. (2016), to study the correlations between the γ -rays and the low-energy bands using a multiple linear regression analysis. In this way, we can see which band is more important for the γ -ray emissions. Mutual correlation analysis is also used to discuss the correlations between the γ -ray and the low energy bands for the whole sample and subclasses. We come to following conclusions: 1. The multiple linear correlation indicates that the γ -rays are correlated with the radio, optical and the X-ray emissions for the whole sample and the subclasses of flat spectrum radio quasars (FSRQs) and BL Lac objects (BL Lacs), the correlation between the γ -rays and the radio emissions is the strongest one. 2. For BL Lacs, the optical emissions are more important than the X-rays for the γ -rays, while the X-ray emissions are more important than optical ones in FSRQs. 3. The γ -ray emissions in HBL are from an synchrotron self-Compton, while those in FSRQs may be from external Compton and synchrotron self-Compton as well.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- July 2018
- DOI:
- 10.1007/s10509-018-3363-5
- Bibcode:
- 2018Ap&SS.363..142Z
- Keywords:
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- BL Lacertae objects: general;
- Galaxies: active;
- Galaxies: jets;
- Quasars: general