Curvature of the spectral energy distribution, the inverse Compton component and the jet in Fermi 2LAC blazars

Xue, Rui; Luo, D. W.; Du, L. M.; Wang, Z. R.; Xie, Zhao-Hua; Yi, Ting-Feng; Xiong, Dingrong; Xu, Yunbing; Liu, W. G.; Yu, Xiaoling

doi:10.1093/mnras/stw2038

Cited by 24 publications

(25 citation statements)

References 81 publications

(109 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, as suggested by previous studies (Wu et al 2014;Lister et al 2015;Paliya et al 2017), if having smaller δ or Le,inj is the main reason that γ-ray quiet FSRQs do not detect γ-ray, the synchrotron flux of these γ-ray quiet FSRQs would also be much lower than that of γ-ray loud FSRQs. Here we select 98 F ermi-2LAC and 60 F ermi-4LAC FSRQs with quasi-simultaneous SEDs in Xue et al (2016) and Tan et al (2020), respectivly, as control samples to compare the synchrotron peak flux between our γ-ray quiet FSRQs and their γ-ray loud FSRQs (see Figure 2). A Kolmogorov-Smirnov test indicates that the synchrotron peak flux distribution in our sample is not significantly different from that in Xue et al (2016) and Tan et al (2020) (p = 0.770 and 0.369 respectively).…”

Section: Resultsmentioning

confidence: 99%

The physical properties of $γ$-ray quiet flat-spectrum radio quasars: why are they undetected by $Fermi$-LAT?

Deng,

Xue,

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

During a decade of the F ermi-Large Area Telescope (LAT) operation, thousands of blazars have been detected in the γ-ray band. However, there are still numbers of blazars that have not been detected in the γ-ray band. In this work, we focus on investigating why some flat-spectrum radio quasars (FSRQs) are undetected by F ermi-LAT. By cross-matching the Candidate Gamma-ray Blazars Survey catalog with the Fourth Catalog of Active Galactic Nuclei Detected by the F ermi-LAT, we select 11 γ-ray undetected (γ-ray quiet) FSRQs as our sample whose quasisimultaneous multi-wavelength data are collected. In the framework of the conventional one-zone leptonic model, we investigate their underlying physical properties and study the possibility that they are undetected with γ-ray by modeling their quasi-simultaneous spectral energy distributions. In contrast to a smaller bulk Lorentz factor suggested by previous works, our results suggest that the dissipation region located relatively far away from the central supermassive black hole is more likely to be the cause of some γ-ray quiet FSRQs being undetected by F ermi-LAT.

show abstract

Section: Resultsmentioning

confidence: 99%

The physical properties of $γ$-ray quiet flat-spectrum radio quasars: why are they undetected by $Fermi$-LAT?

Deng,

Xue,

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Some researchers (e.g., Ghisellini et al 2002;Celotti & Ghisellini 2008;Ghisellini et al 2010;Finke 2013) have also obtained similar results in different ways. Such as Xue et al (2016) have analyzed the slope of the best linear regression that given by the correlation between the IC luminoisty and the synchrotron luminosity, they suggested that the highenergy component of FSRQs is dominated by EC process.…”

Section: Discussionmentioning

confidence: 99%

“…In Xue et al(2016), they collect a sample which contains 200 FSRQs and 79 BL Lacs from the second LAT AGN catalog(2LAC). At least one of the two components (synchrotron and IC components) of the blazars in their sample can be fitted by sufficient multifrequency data coverage.…”

Section: Samplementioning

confidence: 99%

The correlations of multi-wave band luminosity and BLR luminosity in Fermi 2LAC blazars

Wang

Xue

Xie

et al. 2017

Astrophys Space Sci

View full text Add to dashboard Cite

We collect a sample of 78 Fermi detected blazars with broad line region (BLR) data and the quasi-simultaneous multi-wave band data. By analyzing the sample, we find: (1) For whole blazar sample, there exist significant correlations between radio, γ-ray luminosity and BLR luminosity. The slope of the bestfit linear regression equation is close to the theoretical value 1. Our results provided another support of jetdisk symbiosis. (2) For FSRQ sample, we find a significant correlation between radio luminosity and optical luminosity, and weaker correlations between X-ray luminosity and radio, optical luminosity. It indicates that the X-ray band radiation mechanism is slightly different from radio and optical bands. The X-ray emission is diluted by inverse Compton scattering (IC). There is a significant correlation between BLR luminosity and γ-ray luminosity, but no correlations between X-ray luminosity and BLR, γ-ray luminosity, which suggests that the seed soft photons are different for IC process. From these results we suggest that the X-ray band emission is diluted by synchrotron self-Compton (SSC) process, γ-ray band emission is produced by external Compton (EC) process.

show abstract

“…In this paper we are going to study the estimation methods of the bolometric luminosity, therefore the 81 FSRQs and 28 BL Lacs with the complete SEDs in Xue et al(2016) are taken as our sample.…”

Section: Samplementioning

confidence: 99%

“…Bolometric luminosity is one of the most important basic parameters for blazars. It can be used to study the blazar sequence (Fossati et al 1998, Ghisellini et al 2008Ghisellini et al 2010;Ghisellini 2016;Mao et al 2016;Fan et al 2017) , the evolution of blazars (Xie et al 2004;Xie et al 2006), the jet-black hole relation and the jet-disc relation (Xiong et al 2014;Yu et al 2015;Xue et al 2016).…”

Section: Introductionmentioning

confidence: 99%

On estimators of the jet bolometric luminosity of Fermi 2LAC blazars

Wang

Xue

et al. 2017

Astrophys Space Sci

View full text Add to dashboard Cite

Bolometric luminosity is a basic physical parameter that is widely used in the study of blazars. Due to the lack of simultaneous full wavelength data, several estimators of the bolometric luminosity are being used in practice. In this paper, we study and evaluate the reliability and significance of six estimators, the 5GHz luminosity, the 1keV luminosity, the γ-ray luminosity, the 5GHz luminosity+the 1keV luminosity, the 5GHz luminosity+the γ-ray luminosity and the 1keV luminosity+the γ-ray luminosity, by analyzing the linear correlations between the integrated bolometric luminosity and them. Our main results are as follows. (i) All the six estimators are reliable in the sense that they are all significant correlated with the bolometric luminosity. (ii) Ranking from the higher significance of the reliability to lower one the six estimators are the the 5GHz luminosity+the γ-ray luminosity, the 1keV luminosity+the γ-ray luminosity, γ-ray luminosity, the 5GHz luminosity+the 1keV luminosity, the 5GHz lu- Department of Physics, Yunnan Normal University, Kunming 650500, China † email:leiming du@ynao.ac.cn minosity and the 1keV luminosity. (iii) We suggest that the bolometric luminosity can be well estimated by the γ-ray luminosity using the best linear equation that given in this paper for Fermi FSRQs. (iv) According to the linear regressions obtained in the analysis, we provide calibration for each estimator.

show abstract

Curvature of the spectral energy distribution, the inverse Compton component and the jet in Fermi 2LAC blazars

Cited by 24 publications

References 81 publications

The physical properties of $γ$-ray quiet flat-spectrum radio quasars: why are they undetected by $Fermi$-LAT?

The physical properties of $γ$-ray quiet flat-spectrum radio quasars: why are they undetected by $Fermi$-LAT?

The correlations of multi-wave band luminosity and BLR luminosity in Fermi 2LAC blazars

On estimators of the jet bolometric luminosity of Fermi 2LAC blazars

Contact Info

Product

Resources

About