EVIDENCE FOR TWO LOGNORMAL STATES IN MULTI-WAVELENGTH FLUX VARIATION OF FSRQ PKS 1510-089

被引：37

作者：

Kushwaha, Pankaj ^{[1
]}

Chandra, Sunil ^{[2
]}

Misra, Ranjeev ^{[1
]}

Sahayanathan, S. ^{[3
]}

Singh, K. P. ^{[2
]}

Baliyan, K. S. ^{[4
]}

机构：

[1] Inter Univ Ctr Astron & Astrophys, Pune 411007, Maharashtra, India

[2] Tata Inst Fundamental Res, Dept Astron & Astrophys, Homi Bhabha Rd, Mumbai 400005, Maharashtra, India

[3] Bhabha Atom Res Ctr, Astrophys Sci Div, Bombay 400085, Maharashtra, India

[4] Phys Res Lab, Ahmadabad 380009, Gujarat, India

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 822卷 / 01期

关键词：

acceleration of particles; galaxies: active; galaxies: jets; gamma rays: galaxies; quasars: individual (PKS 1510-089); radiation mechanisms: non-thermal; ACTIVE GALACTIC NUCLEI; GAMMA-RAY EMISSION; LIGHT CURVES; VARIABILITY; BLAZARS; BINARIES; RADIO; FLARE; DISTRIBUTIONS; LUMINOSITY;

D O I：

10.3847/2041-8205/822/1/L13

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a systematic characterization of multi-wavelength emission from blazar PKS 1510-089 using well-sampled data at near-infrared (NIR), optical, X-ray, and gamma-ray energies. The resulting flux distributions, except at X-rays, show two distinct lognormal profiles corresponding to a high and a low flux level. The dispersions exhibit energy-dependent behavior except in the LAT gamma-ray and optical B-band. During the low level flux states, it is higher toward the peak of the spectral energy distribution, with gamma-ray being intrinsically more variable followed by IR and then optical, consistent with mainly being a result of varying bulk Lorentz factor. On the other hand, the dispersions during the high state are similar in all bands except the optical B-band, where thermal emission still dominates. The centers of distributions are a factor of similar to 4 apart, consistent with anticipation from studies of extragalactic gamma-ray background with the high state showing a relatively harder mean spectral index compared to the low state.

引用

页数：6

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