A Rapid Change in X-Ray Variability and a Jet Ejection in the Black Hole Transient MAXI J1820+070
Author(s)
Homan, Jeroen; Motta, Sara E.; Bright, Joe; Altamirano, Diego; Arzoumanian, Zaven; Basak, Arkadip; Belloni, Tomaso M.; Cackett, Edward M.; Fender, Rob; Gendreau, Keith C.; Kara, Erin A; Pasham, Dheeraj Ranga Reddy; Remillard, Ronald A; Steiner, James F.; Stevens, Abigail L.; Uttley, Phil; ... Show more Show less
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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 (∼2-2.5 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.
Date issued
2020-03Department
MIT Kavli Institute for Astrophysics and Space ResearchJournal
Astrophysical Journal Letters
Publisher
American Astronomical Society
Citation
Homan, Jeroen et al. "A Rapid Change in X-Ray Variability and a Jet Ejection in the Black Hole Transient MAXI J1820+070." Astrophysical Journal Letters 891, 2 (March 2020): L29 © 2020 The American Astronomical Society
Version: Final published version
ISSN
2041-8213