Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.eso.org/~ppadovan/research.html
Äàòà èçìåíåíèÿ: Wed Dec 9 14:11:43 2015
Äàòà èíäåêñèðîâàíèÿ: Sat Apr 9 23:43:28 2016
Êîäèðîâêà: IBM-866
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Paolo Padovani
European Southern Observatory
Karl-Schwarzschild-Str. 2
D-85748 Garching bei M†®nchen
Germany
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Telephone: +49-89-32006478
Fax: +49-89-32006898
E-mail: ppadovan(at-sign)eso.org
[(at-sign)=@]
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My research is centered on the study of Active Galactic Nuclei (AGN) from a multifrequency point of view. I have in fact worked on radio, infrared, optical, X-ray, gamma-ray, and neutrino data. My current research interests can be divided into the following main areas: ˆà
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  1. òÀâˆàUnified Schemes. Unified schemes try to simplify the classification of AGN by saying ˆàthat some objects appear to be different (and are given different names) ˆàonly as a result of orientation. I have worked on the unification of radio sources through relativistic beaming, that is on the idea that their ˆàemission is dominated by collimated radiation from a relativistic jet ˆàclosely aligned with the line of sight, with enormous effects on their ˆàapparent emitted power and their luminosity functions. Here are my recent papers on this subject.
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  1. òÀâˆàAGN Evolution. In this field I have worked on the observed dependence of the fraction of radio-loud quasars on redshift and apparent magnitude and on the relationship between active nucleus and host galaxy in terms of ˆàmass-loss from stars as a way to fuel the central AGN and to explain the metallicity of the broad line regions. Here are my recent papers on this subject.
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  1. òÀâˆàBL Lacertae Objects. I have defined the BL Lac classes of High-energy (HBL) and Low-energy peaked (LB) BL Lacs, based on the frequency of their synchrotron peak. This physically based definition has lead researchers to a better understanding of this rare class of astronomical sources. Here are my recent ˆàpapers on this subject. ˆà
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  1. òÀâˆàX-ray Spectra of AGN. I have studied the X-ray spectra of various classes of radio-loud AGN, using different X_ray satellites. Here are my recent papers on this ˆàsubject.
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  1. òÀâˆàBlazar Surveys. I have been involved, amongst others, in the DXRBS survey, a project aimed at putting together a large, deep sample of blazars by cross-correlating radio and X-ray catalogs and selecting flat-spectrum radio sources as blazar candidates for ˆàsubsequent spectroscopic identification. Here are my recent papers on this subject.
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  1. òÀâˆàDeep Radio Surveys. I have worked with the Chandra Deep Field South (CDFS) team on some extremely deep VLA data of the CDFS area. We find that, while the well-known flattening of the radio number counts below 1 mJy is mostly due to star forming galaxies, these sources and AGN make up an approximately equal fraction of the sub-millijansky sky, contrary to some previous results. The AGN include radio galaxies, mostly of the low-power, Fanaroff-Riley I type, and a significant radio-quiet component, which amounts to approximately one fifth of the total sample. Here are my recent papers on this subject.
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  1. òÀâˆàNeutrino Astronomy. I am trying to figure out which astronomical sources are the counterparts of the high-energy neutrinos observed by IceCube. I believe blazars are most likely. Here are my recent papers on this subject.
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My Research