Marek Sikora is a Polish astronomer. He achieved his

Habilitation Habilitation is the highest university degree, or the procedure by which it is achieved, in many European countries. The candidate fulfills a university's set criteria of excellence in research, teaching and further education, usually including a ...

astrophysics Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline said, Astrophysics "seeks to ascertain the nature of the h ...

in 1990 from

University of Warsaw The University of Warsaw ( pl, Uniwersytet Warszawski, la, Universitas Varsoviensis) is a public university in Warsaw, Poland. Established in 1816, it is the largest institution of higher learning in the country offering 37 different fields of ...

. He received the title of professor in 1999. Currently he works as a professor in the Centrum Astronomiczne im. Mikołaja Kopernika PAN,

Polish Academy of Sciences The Polish Academy of Sciences ( pl, Polska Akademia Nauk, PAN) is a Polish state-sponsored institution of higher learning. Headquartered in Warsaw, it is responsible for spearheading the development of science across the country by a society of ...

Warsaw Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland, and its population is officia ...

. He is interested mainly high energy astrophysics,

astrophysical jet An astrophysical jet is an astronomical phenomenon where outflows of ionised matter are emitted as an extended beam along the axis of rotation. When this greatly accelerated matter in the beam approaches the speed of light, astrophysical jets bec ...

s, the nuclei of active galaxies, and sources of

cosmic radiation Cosmic rays are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light. They originate from the Sun, from outside of the Solar System in our own ...

Published works

*2008, 3C 454.3 Reveals the structure and physics of its Blazar zone, ''

The Astrophysical Journal ''The Astrophysical Journal'', often abbreviated ''ApJ'' (pronounced "ap jay") in references and speech, is a peer-reviewed Peer review is the evaluation of work by one or more people with similar competencies as the producers of the work ...

'', 675, pp. 71, 2008 Marek Jan Sikora, Rafal Moderski, Gregory Maria Madejski *2008 Multiwavelength Observations of the Powerful Gamma-Ray Quasar PKS 1510-089: Clues on the Jet Composition, ''The Astrophysical Journal'', 672, pp. 787, 2008 Marek Jan Sikora, Rafal Moderski, Kataoka et al. (Sikora, M .; Moderski, R.) *2008 Radio-loudness of Active Galaxies and the Black Hole Evolution, '' New Astronomy Reviews'', 51, pp. 891, 2008 Marek Jan Sikora, Lukasz Stawarz, JP Lasota *2007 Radio-loudness of active galactic nuclei: observational facts and Theoretical implications, ''The Astrophysical Journal'', 658, pp. 815, 2007 Marek Jan Sikora, Lukasz Stawarz, JP Lasota *2007 On Magnetic Field in Broad-line Blazars, Proceedings ''"Recontre de Moriond"'' 2007 Marek Jan Sikora, Rafal Moderski, *2007, Radio loudness of AGNs: host galaxy morphology and the spin paradigm Proceedings of ''"Extragalactic Jets: Theory and Observations from Radio is Gamma Rays"'', 2007, Marek Jan Sikora, Lukasz Stawarz, JP Lasota *2006 Dynamics and high-energy emission of the flaring HST-1 wick in the M87 jet, ''Monthly Noticies of the RAS'', 370, p. 981, 2006 Marek Jan Sikora, Lukasz Stawarz, F. Aharonian, Kataoka J. Ostrowski M., Siemiginowska A. *2005 Klein-Nishina effects in the spectra of non-thermal sources immersed in external radiation fields, ''Monthly Noticies of the RAS'', 363, p. 954, 2005 Marek Jan Sikora, Rafal Moderski, Coppi PS Aharonian, F.

References

Living people 21st-century Polish astronomers Year of birth missing (living people) 20th-century Polish astronomers {{Poland-academic-bio-stub