Multi-wavelength Intra-day Variability and Quasi-periodic Oscillation in Blazars - INSPIRE

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Multi-wavelength Intra-day Variability and Quasi-periodic Oscillation in Blazars

Alok C. Gupta

Dec 7, 2017

13 pages

Published in:

Galaxies 6 (2017) 1, 1

Published: Dec 25, 2017

e-Print:

1712.02516 [astro-ph.HE]

DOI:

10.3390/galaxies6010001

View in:

ADS Abstract Service

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Abstract: (MDPI)

We reviewed multi-wavelength blazars variability and detection of quasi-periodic oscillations on intra-day timescales. The variability timescale from a few minutes to up to less than a days is commonly known as intra-day variability. These fast variations are extremely useful to constrain the size of the emitting region, black hole mass estimation, etc. It is noticed that in general, blazars show intra-day variability in the complete electromagnetic spectrum. However, some classes of blazars either do not show or show very little intra-day variability in a specific band of the electromagnetic spectrum. Blazars show rarely quasi-periodic oscillations in time series data in optical and X-ray bands. Other properties and emission mechanisms of blazars are also briefly discussed.

Note:

Invited Review; Submitted to Galaxies; a special issue on Microvariability of Blazars

active galaxies
BL Lacertae object: BL Lac
quasars: flat spectrum radio quasars
jets, accretion disk
black hole: mass
jet: quasar
blazar
AGN
oscillation
electromagnetic

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