The correlation between 
                
                    
                                    
                        γ
                    
                
                $\gamma$
            -photon energy and synchrotron peak frequency for Fermi BL Lac objects

Yang, Chaohe; Fan, J. H.; Liu, Y.; Zhang, Y. L.; Ru-shu, Yang; Man-xian, Tuo; Nie, Jianjun; Yuan, Yueding

doi:10.1007/s10509-017-3194-9

Cited by 12 publications

(4 citation statements)

References 56 publications

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“…For a γ-ray BL Lac, when the photon flux is adopted for a power law function, dN/dE = N 0 E −α ph , where N is the integral photon flux in the units of photons/cm 2 /s, and α ph is the photon spectral index, N 0 can be expressed as (Fan et al 2013;Xiao et al 2015;Lin et al 2017;Yang et al 2017)…”

Section: Resultsmentioning

confidence: 99%

A study of Intrinsic $γ$-ray Emission for {\it Fermi}/LAT-detected BL Lacs

Ye¹,

Zeng²,

Yang³

et al. 2021

Preprint

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BL Lacs are one subclass of blazars with highly energetic γ-ray emission, which is strongly boosted by a relativistic beaming effect. The latest catalogue of the 10 years of Fermi/LAT data (Abdollahi et al. 2020) and the γ-ray Doppler factors in Pei et al. ( 2020) provide us with a large BL Lac sample to study their jet emission morphologies and intrinsic properties. In this paper, we collected a sample of 294 Fermi BL Lacs and probed the correlations between the γ-ray emissions and luminosity distances. Our analyses give following conclusions: (1) the observed γ-ray emissions are really boosted by the γ-ray Doppler factor, and the intrinsic γ-ray emissions are closely correlated with luminosity distances. (2) the morphology of jet emissions for HBLs may be continuous, while that for IBLs may be the case of a moving sphere in the γ-ray bands.

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Section: Resultsmentioning

confidence: 99%

A study of Intrinsic $γ$-ray Emission for {\it Fermi}/LAT-detected BL Lacs

Ye¹,

Zeng²,

Yang³

et al. 2021

Preprint

Self Cite

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“…. Luminosity can be calculated from the detected photons (Fan et al 2012;Lin & Fan 2016;Yang et al 2017) through…”

Section: Data Processmentioning

confidence: 99%

Comparison Between TeV and Non-TeV Fermi-detected BL Lacertae Objects

Liang,

Zeng,

Chen

et al. 2023

PASP

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In this paper, we compiled a sample of 410 Fermi-detected BL Lacs, including 42 TeV-detected BL Lacs (TBLs) and 368 non-TeV-detected BL Lacs (non-TBLs) with corresponding mid-infrared (mid-IR), TeV and Fermi γ-ray data, and calculated some important parameters including monochromatic luminosities (mid-IR, GeV and TeV bands) and mid-IR spectral indices. Based on those parameters, we discussed the relationship between the mid-IR and the TeV bands and that between the mid-IR and the GeV bands. Main conclusions are drawn as follows: (1) In the color–color and color–magnitude diagrams, our sample forms a WISE-Gamma Strip in the [3.4]–[4.6]–[12] μm color–color diagram, and TBLs occupy the brighter region than the non-TBLs for the similar color-index in the color-magnititue diagram; (2) The mid-IR luminosity of the TBLs is on average higher than that of non-TBLs, while the average mid-IR spectral index of TBLs is smaller than the non-TBLs, suggesting that TBLs are brighter and hold a more flat spectrum than do the non-TBLs in the mid-IR band. Besides, HBLs have a more flat mid-IR spectrum than LBLs and IBLs; (3) The mid-IR luminosity is positively correlated with the GeV luminosity and the intrinsic TeV luminosity. A positive correlation exists between the mid-IR spectral index and the observed TeV spectral index, which is consistent with the expectations of the synchrotron self-Compton mechanism. We suggest that the HBLs with extreme relativistic electrons might scatter the mid-IR photons up to the TeV band.

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“…We compiled 341 blazars (119 BL Lac objects, 222 FSRQs), including 222 Fermidetected blazars (FDBs) and 119 non-Fermi-detected blazars (non-FDBs), from the historical literature with available optical polarizations [2,30,42,43,[58][59][60][61][62][63] and references therein, monochromatic luminosities (radio, optical luminosities) [18], apparent velocity [11] and broad-line luminosity [64,65]. We calculated the γ-ray luminosity for the sample with available redshift from the NASA/IPAC Extragalactic Database (NED) via the following equation [44,66,67]:…”

Section: The Samplementioning

confidence: 99%

Polarization Properties of Blazars

Chen,

Liang,

Zeng

et al. 2023

Preprint

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Blazars are an extreme subclass of active galactic nuclei showing rapid and large-amplitude variability, high and variable polarization, strong γ-ray emissions, or superluminal motion, etc. If a strong beaming effect is the reason for the extreme observation properties, then one would expect that these properties would be correlated with each other. In this paper, we compiled a sample of 341 blazars with optical polarization and other data, and investigated the correlation between the optical polarization and multi-wavelength luminosity, as well as apparent velocity. Our analysis comes to the following conclusions: (1) Polarization and observed luminosity (at radio, optical, and γ-ray bands) are all positively correlated in BL Lacertae (BL Lac) objects. (2) A γ-ray source or a higher apparent velocity source tend to have a higher polarization. (3) The polarization distributions of BL Lac objects and flat spectrum radio quasars (FSRQs) come from different parent distribution, with the polarization in Bl Lac objects being higher than that in FSRQs.

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The correlation between γ $\gamma$ -photon energy and synchrotron peak frequency for Fermi BL Lac objects

Cited by 12 publications

References 56 publications

A study of Intrinsic $γ$-ray Emission for {\it Fermi}/LAT-detected BL Lacs

A study of Intrinsic $γ$-ray Emission for {\it Fermi}/LAT-detected BL Lacs

Comparison Between TeV and Non-TeV Fermi-detected BL Lacertae Objects

Polarization Properties of Blazars

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