X-ray nova MAXI J1828-249. Evolution of the broadband spectrum during its 2013–2014 outburst
| Autor: | A. V. Prosvetov, S. A. Grebenev, A. Mescheryakov, Roman Krivonos, R. A. Burenin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Infrared Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Synchrotron radiation Astronomy and Astrophysics Nova (laser) Astrophysics Radiation 01 natural sciences law.invention Telescope Corona (optical phenomenon) Astrophysical jet Space and Planetary Science law 0103 physical sciences Black-body radiation Astrophysics::Earth and Planetary Astrophysics Astrophysics - High Energy Astrophysical Phenomena 010306 general physics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomy Letters. 42:69-81 |
| ISSN: | 1562-6873 1063-7737 |
| DOI: | 10.1134/s1063773716020031 |
| Popis: | Based on data from the SWIFT, INTEGRAL, MAXI/ISS orbital observatories, and the ground-based RTT-150 telescope, we have investigated the broadband (from the optical to the hard X-ray bands) spectrum of the X-ray nova MAXI J1828-249 and its evolution during the outburst of the source in 2013-2014. The optical and infrared emissions from the nova are shown to be largely determined by the extension of the power-law component responsible for the hard X-ray emission. The contribution from the outer cold regions of the accretion disk, even if the X-ray heating of its surface is taken into account, turns out to be moderate during the source's "high" state (when a soft blackbody emission component is observed in the X-ray spectrum) and is virtually absent during its "low" ("hard") state. This result suggests that much of the optical and infrared emissions from such systems originates in the same region of main energy release where their hard X-ray emission is formed. This can be the Compton or synchro-Compton radiation from a high-temperature plasma in the central accretion disk region puffed up by instabilities, the synchrotron radiation from a hot corona above the disk, or the synchrotron radiation from its relativistic jets. 18 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|