Search

Your search keyword '"Berdyugin, Andrei V."' showing total 7 results
Start Over Author "Berdyugin, Andrei V." Publisher edp sciences
7 results on '"Berdyugin, Andrei V."'

2. Complex variations in X-ray polarization in the X-ray pulsar LS V +44 17/RX J0440.9+4431

Author

Doroshenko, Victor, primary, Poutanen, Juri, additional, Heyl, Jeremy, additional, Tsygankov, Sergey S., additional, Caiazzo, Ilaria, additional, Turolla, Roberto, additional, Veledina, Alexandra, additional, Weisskopf, Martin C., additional, Forsblom, Sofia V., additional, González-Caniulef, Denis, additional, Loktev, Vladislav, additional, Malacaria, Christian, additional, Mushtukov, Alexander A., additional, Suleimanov, Valery F., additional, Lutovinov, Alexander A., additional, Mereminskiy, Ilya A., additional, Molkov, Sergey V., additional, Salganik, Alexander, additional, Santangelo, Andrea, additional, Berdyugin, Andrei V., additional, Kravtsov, Vadim, additional, Nitindala, Anagha P., additional, Agudo, Iván, additional, Antonelli, Lucio A., additional, Bachetti, Matteo, additional, Baldini, Luca, additional, Baumgartner, Wayne H., additional, Bellazzini, Ronaldo, additional, Bianchi, Stefano, additional, Bongiorno, Stephen D., additional, Bonino, Raffaella, additional, Brez, Alessandro, additional, Bucciantini, Niccolò, additional, Capitanio, Fiamma, additional, Castellano, Simone, additional, Cavazzuti, Elisabetta, additional, Chen, Chien-Ting, additional, Ciprini, Stefano, additional, Costa, Enrico, additional, De Rosa, Alessandra, additional, Del Monte, Ettore, additional, Di Gesu, Laura, additional, Di Lalla, Niccolò, additional, Di Marco, Alessandro, additional, Donnarumma, Immacolata, additional, Dovčiak, Michal, additional, Ehlert, Steven R., additional, Enoto, Teruaki, additional, Evangelista, Yuri, additional, Fabiani, Sergio, additional, Ferrazzoli, Riccardo, additional, García, Javier A., additional, Gunji, Shuichi, additional, Hayashida, Kiyoshi, additional, Iwakiri, Wataru, additional, Jorstad, Svetlana G., additional, Kaaret, Philip, additional, Karas, Vladimir, additional, Kislat, Fabian, additional, Kitaguchi, Takao, additional, Kolodziejczak, Jeffery J., additional, Krawczynski, Henric, additional, La Monaca, Fabio, additional, Latronico, Luca, additional, Liodakis, Ioannis, additional, Maldera, Simone, additional, Manfreda, Alberto, additional, Marin, Frédéric, additional, Marinucci, Andrea, additional, Marscher, Alan P., additional, Marshall, Herman L., additional, Massaro, Francesco, additional, Matt, Giorgio, additional, Mitsuishi, Ikuyuki, additional, Mizuno, Tsunefumi, additional, Muleri, Fabio, additional, Negro, Michela, additional, Ng, Chi-Yung, additional, O’Dell, Stephen L., additional, Omodei, Nicola, additional, Oppedisano, Chiara, additional, Papitto, Alessandro, additional, Pavlov, George G., additional, Peirson, Abel L., additional, Perri, Matteo, additional, Pesce-Rollins, Melissa, additional, Petrucci, Pierre-Olivier, additional, Pilia, Maura, additional, Possenti, Andrea, additional, Puccetti, Simonetta, additional, Ramsey, Brian D., additional, Rankin, John, additional, Ratheesh, Ajay, additional, Roberts, Oliver J., additional, Romani, Roger W., additional, Sgrò, Carmelo, additional, Slane, Patrick, additional, Soffitta, Paolo, additional, Spandre, Gloria, additional, Swartz, Douglas A., additional, Tamagawa, Toru, additional, Tavecchio, Fabrizio, additional, Taverna, Roberto, additional, Tawara, Yuzuru, additional, Tennant, Allyn F., additional, Thomas, Nicholas E., additional, Tombesi, Francesco, additional, Trois, Alessio, additional, Vink, Jacco, additional, Wu, Kinwah, additional, Xie, Fei, additional, and Zane, Silvia, additional

Published
2023
Full Text
View/download PDF

5. Orbital variability of the optical linear polarization of the gamma-ray binary LS I+61 degrees 303 and new constraints on the orbital parameters

Author

Kravtsov, Vadim, Berdyugin, Andrei V., Piirola, Vilppu, Kosenkov, Ilia A., Tsygankov, Sergey S., Chernyakova, Maria, Malyshev, Denys, Sakanoi, Takeshi, Kagitani, Masato, Berdyugina, Svetlana V., Poutanen, Juri, Kravtsov, Vadim, Berdyugin, Andrei V., Piirola, Vilppu, Kosenkov, Ilia A., Tsygankov, Sergey S., Chernyakova, Maria, Malyshev, Denys, Sakanoi, Takeshi, Kagitani, Masato, Berdyugina, Svetlana V., and Poutanen, Juri

Abstract

We studied the variability of the linear polarization and brightness of the gamma -ray binary LS I +61 degrees 303. High-precision BVR photopolarimetric observations were carried out with the Dipol-2 polarimeter on the 2.2 m remotely controlled UH88 telescope at Mauna Kea Observatory and the 60 cm Tohoku telescope at Haleakala bservatory (Hawaii) over 140 nights in 2016-2019. We also determined the degree and angle of the interstellar polarization toward LS I +61 degrees 303 using two out of four nearby field stars that have Gaia's parallaxes. After subtracting the interstellar polarization, we determined the position angle of the intrinsic polarization theta similar or equal to 11 degrees, which can either be associated with the projection of the Be star's decretion disk axis on the plane of sky, or can differ from it by 90 degrees. Using the Lomb-Scargle method, we performed timing analyses and period searches of our polarimetric and photometric data. We found statistically significant periodic variability of the normalized Stokes parameters q and u in all passbands. The most significant period of variability, P-Pol=13.244 +/- 0.012 d, is equal to one half of the orbital period P-orb=26.496 d. The fits of the polarization variability curves with Fourier series show a dominant contribution from the second harmonic which is typical for binary systems with circular orbits and nearly symmetric distribution of light scattering material with respect to the orbital plane. The continuous change of polarization with the orbital phase implies co-planarity of the orbit of the compact object and the Be star's decretion disk. Using a model of Thomson scattering by a cloud that orbits the Be star, we obtained constraints on the orbital parameters, including a small eccentricity e<0.2 and periastron phase of (p)approximate to 0.6, which coincides with the peaks in the radio, X-ray, and TeV emission. These constraints are independent of the assumption about the orie, QC 20210201

Published
2020
Full Text
View/download PDF

6. Orbital variability of the optical linear polarization of the γ-ray binary LS I +61° 303 and new constraints on the orbital parameters

Author

Kravtsov, Vadim, primary, Berdyugin, Andrei V., additional, Piirola, Vilppu, additional, Kosenkov, Ilia A., additional, Tsygankov, Sergey S., additional, Chernyakova, Maria, additional, Malyshev, Denys, additional, Sakanoi, Takeshi, additional, Kagitani, Masato, additional, Berdyugina, Svetlana V., additional, and Poutanen, Juri, additional

Published
2020
Full Text
View/download PDF

7. Evolving optical polarisation of the black hole X-ray binary MAXI J1820+070

Author

Veledina, Alexandra, primary, Berdyugin, Andrei V., additional, Kosenkov, Ilia A., additional, Kajava, Jari J. E., additional, Tsygankov, Sergey S., additional, Piirola, Vilppu, additional, Berdyugina, Svetlana V., additional, Sakanoi, Takeshi, additional, Kagitani, Masato, additional, Kravtsov, Vadim, additional, and Poutanen, Juri, additional

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results