Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Villata, Massimo"'
Autor:
Carnerero, Maria, Raiteri, Claudia, Villata, Massimo, Acosta Pulido, Jose, Smith, Paul, Larionov, Valeri
We investigate the multiwavelength behaviour of the high-energy peaked BL Lac object (HBL) Mrk 421 at redshift z = 0.031 in the period 2007-2015. We use optical photometric, spectroscopic, and polarimetric data and near-infrared data obtained by 35 o
Externí odkaz:
http://hdl.handle.net/10150/622694
http://arizona.openrepository.com/arizona/handle/10150/622694
http://arizona.openrepository.com/arizona/handle/10150/622694
Autor:
Roy, Abhradeep, Gupta, Alok C., Chitnis, Varsha R., Cellone, Sergio A., Raiteri, Claudia M., Romero, Gustavo E., Wiita, Paul J., Chatterjee, Anshu, Combi, Jorge A., Liao, Mai, Sarkar, Arkadipta, Villata, Massimo
We present a long-term and intraday variability study on optical multiwaveband ($U\!BV\!RI$) data from the blazar AO 0235+164 collected by various telescopes for $\sim$44 years (1975--2019). The blazar was found to be significantly variable over the
Externí odkaz:
http://arxiv.org/abs/2301.01944
Autor:
Markowitz, Alex G., Nalewajko, Krzysztof, Bhatta, Gopal, Dewangan, Gulab C., Chandra, Sunil, Dorner, Daniela, Schleicher, Bernd, Pajdosz-Smierciak, Urszula, Stawarz, Lukasz, Zola, Staszek, Ostrowski, Michal, Carosati, Daniele, Krishnan, Saikruba, Bachev, Rumen, Benitez, Erika, Gazeas, Kosmas, Hiriart, David, Hu, Shao-Ming, Larionov, Valeri, Marchini, Alessandro, Matsumoto, Katsura, Nikiforova, A. A., Pursimo, Tapio, Raiteri, Claudia M., Reichart, Daniel E., Rodriguez, Diego, Semkov, Evgeni, Strigachev, Anton, Sugiura, Yuki, Villata, Massimo, Webb, James R., Arbet-Engels, Axel, Baack, Dominik, Balbo, Matteo, Biland, Adrian, Bretz, Thomas, Buss, Jens, Eisenberger, Laura, Elsaesser, Dominik, Hildebrand, Dorothee, Iotov, Roman, Kalenski, Adelina, Mannheim, Karl, Mitchell, Alison, Neise, Dominik, Noethe, Maximilian, Paravac, Aleksander, Rhode, Wolfgang, Sliusar, Vitalii, Walter, Roland
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2022, Volume 513, Issue 2, pp.1662-1679
The study of short-term variability properties in AGN jets has the potential to shed light on their particle acceleration and emission mechanisms. We report results from a four-day coordinated multi-wavelength campaign on the highly-peaked blazar (HB
Externí odkaz:
http://arxiv.org/abs/2206.03874
Autor:
Roy, Abhradeep, Chitnis, Varsha R., Gupta, Alok C., Wiita, Paul J., Romero, Gustavo E., Cellone, Sergio A., Chatterjee, Anshu, Combi, Jorge A., Raiteri, Claudia M., Sarkar, Arkadipta, Villata, Massimo
We present a long term optical $R$ band light curve analysis of the gravitationally lensed blazar AO 0235+164 in the time span 1982 - 2019. Several methods of analysis lead to the result that there is a periodicity of ~8.13 years present in these dat
Externí odkaz:
http://arxiv.org/abs/2205.03586
Autor:
Raiteri, Claudia M., Carnerero, Maria I., Balmaverde, Barbara, Bellm, Eric C., Clarkson, William, D'Ammando, Filippo, Paolillo, Maurizio, Richards, Gordon T., Villata, Massimo, Yoachim, Peter, Yoon, Ilsang
With their emission mainly coming from a relativistic jet pointing towards us, blazars are fundamental sources to study extragalactic jets and their central engines, consisting of supermassive black holes (SMBHs) fed by accretion discs. They are also
Externí odkaz:
http://arxiv.org/abs/2111.10172
Autor:
Raiteri, Claudia M., Villata, Massimo
Publikováno v:
Galaxies 2021, 9(2), 42
Active galactic nuclei come in many varieties. A minority of them are radio-loud, and exhibit two opposite prominent plasma jets extending from the proximity of the supermassive black hole up to megaparsec distances. When one of the relativistic jets
Externí odkaz:
http://arxiv.org/abs/2106.06428
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Autor:
Bhatta, Gopal, Goyal, Arti, Ostrowski, Michal, Stawarz, Łukasz, Arkharov, A. A., Akitaya, Hiroshi, Bachev, Rumen, Benítez, Erika, Borman, G. A., Carosati, Daniele, Cason, Andy, Damljanovic, Goran, Dhalla, Sarah, Frasca, Antonio, Hiriart, David, Hu, Shao Ming, Itoh, Ryosuke, Jableka, Damian, Jorstad, Svetlana, Kawabata, Koji, Klimanov, Sergey, Kurtanidze, Omar, Larionov, Valeri, Laurence, Douglas, Leto, Giuseppe, Markowitz, Alex, Marscher, Alan P., Moody, J., Moritani, Yuki, Ohlert, Johannes, Di Paola, Andrea, Raiteri, Claudia M., Rizzi, Nicola, Sadun, Alberto, Sasada, Mahito, Sergeev, Sergey G, Strigachev, Anton, Takaki, Katsutoshi, Troitsky, Ivan, Ui, Takahiro, Villata, Massimo, Vince, Oliver, Webb, James, Yoshida, Michitoshi, Zola, Staszek
The occurrence of low-amplitude flux variations in blazars on hourly timescales, commonly known as microvariability, is still a widely debated subject in high-energy astrophysics. Several competing scenarios have been proposed to explain such occurre
Externí odkaz:
http://arxiv.org/abs/1507.08424
Autor:
Villata, Massimo
Until now, there is no experimental evidence on the gravitational behaviour of antimatter. While we may be confident that antimatter attracts antimatter, we do not know anything on the interaction between matter and antimatter. We investigate this is
Externí odkaz:
http://arxiv.org/abs/1003.1635