English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We fit the spectral energy distributions (SEDs) of 46 GeV - TeV BL Lacobjects in the frame of leptonic one-zone synchrotron self-Compton (SSC) modeland investigate the physical properties of these objects. We use the MarkovChain Monte Carlo (MCMC) method to obtain the basic parameters, such asmagnetic field (B), the break energy of the relativistic electron distribution($\gamma'_{\rm{b}}$) and the electron energy spectral index. Based on themodeling results, we support the following scenarios on GeV-TeV BL Lac objects:(1) Some sources have large Doppler factors, implying other radiation mechanismshould be considered. (2) Comparing with FSRQs, GeV-TeV BL Lac objects haveweaker magnetic field and larger Doppler factor, which cause the ineffectivecooling and shift the SEDs to higher bands. Their jet powers are around$4.0\times 10^{45}~\rm{ erg\cdot s}^{-1}$, comparing with radiation power,$5.0\times 10^{42}~\rm{ erg\cdot s}^{-1}$, indicating that only a smallfraction of jet power is transformed into the emission power. (3) For some BLLacs with large Doppler factors, their jet components could have twosubstructures, e.g., the fast core and the slow sheath. For most GeV-TeV BLLacs, Kelvin-Helmholtz instabilities are suppressed by their higher magneticfields, leading few micro-variability or intro-day variability in the opticalbands. (4) Combined with a sample of FSRQs, an anti-correlation between thepeak luminosity $L_{\rm {pk}}$ and the peak frequency $\nu_{\rm {pk}}$ isobtained, favoring the blazar sequence scenario. In addition, ananti-correlation between the jet power $P_{\rm {jet}}$ and the break Lorentzfactor $\gamma_{\rm {b}}$ also supports the blazar sequence.

Using the Markov Chain Monte Carlo method to study the physical properties GeV-TeV BL Lac objects