Ամսագրի կամ հրապարակման վերնագիր:

Բյուրականի աստղադիտարանի հաղորդումներ: Երևանի աստղադիտարանի բյուլետեն = Сообщения Бюраканской обсерватории. Бюллетень ереванской Астрономической обсерватории = Contributions from the Burakan observatory. Bulletin of the Erevan astronomical observatory

Հրապարակման ամսաթիվ:

2019

Հատոր:

66

Համար:

1

ISSN:

2579-2276

Ծածկույթ:

94-110

Ամփոփում:

The observations of astrophysical sources in a large frequency range (from radio to very high energy gamma-ray bands) provide complete information on the non-thermal processes taking place in different objects. Here, the origin of broadband emission from the jets of at-spectrum radio quasars are discussed. For the current study the blazars detected above 100 GeV: PKS 1441+25, 3C 279, PKS 1222+216, PKS 1510-089, as well as CTA 102, which was in aring state in optcal/UV, X-ray and high energy gamma-ray bands, are selected. The publicly available data of Fermi LAT, Swift UVOT/XRT, Nustar telescopes have been analyzed, which enables to identify the prominent aring and quiescent states for those sources, as well as, study the spectral properties, constrain the size and location of the emitting region. The multiwavelength emission spectra of those sources, in different states, are modelled, which is crucial for understanding the particle acceleration and emission processes in their jets. For this purpose, a new code that can derive the model free parameters which statistically better describe the observed data is used. It derives the best-fit parameters and their uncertainties through Markov Chain Monte Carlo sampling of the likelihood distributions. By means of the detailed theoretical modeling of acquired data, it was possible to derive or at least constrain some crucial parameters such as the magnetic field, jet energetics, electron energy density etc.

Ձևաչափ:

pdf

Նույնացուցիչ:

oai:arar.sci.am:295326

Լեզու:

en

Գլխավոր նշում:

Communications of the Byurakan Astrophysical Observatory (ComBAO) is a peer-reviewed scientific journal, which publishes research in observational and theoretical astronomy/astrophysics and presents recent advances in these fields. It is being published by the NAS RA V. Ambartsumian Byurakan Astrophysical Observatory (BAO) in English in electronic form. The journal publishes original papers, review papers, brief reports, book reviews, special communications, observational and theoretical results in various fields of astronomy and related sciences, and some editorial notes, including anniversaries and obituaries. Under the heading “Legacy”, the renewed magazine will republish some old articles of high value in English. The heading “Guest articles” will bring to the attention of readers the articles of researchers who are not employees of BAO. ComBAO was founded in 1946 and regularly published in 1946-1990. However, the publication was interrupted because of the economic situation after the disintegration of the Soviet Union in 1991.

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