MASTER Optical Polarization Variability Detection in the Microquasar V404 Cyg/GS 2023+33
| Autor: | R. Podesta, N. M. Budnev, Miquel Serra-Ricart, Andrey Tlatov, Yu. Sergienko, G. Israelyan, R. Rebolo Lopez, A. Gabovich, D. A. H. Buckley, H. Levato, S. Yazev, C. Saffe, V. M. Lipunov, O. A. Gress, A. Kuznetsov, C. Mallamaci, N. Lodieu, V. Yurkov, V. Krushinskiy, P. Balanutsa, D. Vlasenko, C. Lopez, E. S. Gorbovskoy, N. Tiurina, V. G. Kornilov, K. Ivanov |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
EVOLUTION [STARS]
ACCRETION ACCRETION DISKS Astrophysics::High Energy Astrophysical Phenomena Ciencias Físicas FOS: Physical sciences INDIVIDUAL (V404 CYG) [STARS] Astrophysics 01 natural sciences JETS [STARS] purl.org/becyt/ford/1 [https] Accretion disc 0103 physical sciences Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Astronomy and Astrophysics Optical polarization purl.org/becyt/ford/1.3 [https] Astronomía Stars Space and Planetary Science BLACK HOLES [STARS] Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Astrophysical Journal CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | On 2015 June 15 the Swift space observatory discovered that the Galactic black hole candidate V404 Cyg was undergoing another active X-ray phase, after 25 years of inactivity (Barthelmy et al. 2015). Twelve telescopes of the MASTER Global Robotic Net located at six sites across four continents were the first ground based observatories to start optical monitoring of the microquasar after its gamma-ray wakeup at 18h 34m 09s U.T. on 2015 June 15 (Lipunov et al. 2015). In this paper we report, for the first time, the discovery of variable optical linear polarization, changing by 4-6% over a timescale of approximately 1 h, on two different epochs. We can conclude that the additional variable polarization arisies from the relativistic jet generated by the black hole in V404Cyg. The polarization variability correlates with optical brightness changes, increasing when the flux decreases. 10 pages, 1 figures, 4 tables, accepted for publication in the The Astrophysical Journal |
| Databáze: | OpenAIRE |
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