A rapid change in X-ray variability and a jet ejection in the black hole transient MAXI J1820+070
| Autor: | Erin Kara, Dheeraj R. Pasham, Keith C. Gendreau, Arkadip Basak, Joe Bright, Zaven Arzoumanian, Phil Uttley, Diego Altamirano, Ronald A. Remillard, Edward M. Cackett, Tomaso Belloni, Rob Fender, Sara Motta, Jeroen Homan, Abigail L. Stevens, James F. Steiner |
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| Přispěvatelé: | High Energy Astrophys. & Astropart. Phys (API, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Jet (fluid) Superluminal motion 010504 meteorology & atmospheric sciences Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences law.invention Black hole Neutron star Space and Planetary Science law Quasiperiodic function 0103 physical sciences Broadband Astrophysics - High Energy Astrophysical Phenomena Ejecta 010303 astronomy & astrophysics 0105 earth and related environmental sciences Flare |
| Zdroj: | Astrophysical Journal Letters, 891(2):L29. IOP Publishing Ltd. |
| ISSN: | 2041-8205 |
| Popis: | We present Neutron Star Interior Composition Explorer X-ray and Arcminute Microkelvin Imager Large Array radio observations of a rapid hard-to-soft state transition in the black hole X-ray transient MAXI J1820+070. During the transition from the hard state to the soft state a switch between two particular types of quasiperiodic oscillations (QPOs) was seen in the X-ray power density spectra, from type-C to type-B, along with a drop in the strength of the broadband X-ray variability and a brief flare in the 7-12 keV band. Soon after this switch (~1.5-2.5 hr) a strong radio flare was observed that corresponded to the launch of superluminal ejecta. Although hints of a connection between QPO transitions and radio flares have been seen in other black hole X-ray transients, our observations constitute the strongest observational evidence to date for a link between the appearance of type-B QPOs and the launch of discrete jet ejections. Comment: Accepted for publication in ApJ Letters |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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