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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
A Rapid Change in X-Ray Variability and a Jet Ejection in the Black Hole Transient MAXI J1820+070
Astrophysical Journal Letters, Volume 891, No. 2, Article L29, Year 2020
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Description
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. © 2020. The American Astronomical Society.
Authors & Co-Authors
Homan, Jeroen
United States, Oakland
Eureka Scientific, Inc.
Netherlands, Utrecht
Sron Netherlands Institute for Space Research
Bright, Joe S.
United Kingdom, Oxford
University of Oxford
Motta, Sara Elisa
United Kingdom, Oxford
University of Oxford
Altamirano, Diego
United Kingdom, Southampton
University of Southampton
Arzoumanian, Zaven
United States, Greenbelt
Nasa Goddard Space Flight Center
Belloni, Tomaso M.
Italy, Merate
Osservatorio Astronomico Di Brera
Cackett, Edward M.
United States, Detroit
Wayne State University
Fender, Robert P.
United Kingdom, Oxford
University of Oxford
Gendreau, Keith C.
United States, Greenbelt
Nasa Goddard Space Flight Center
Kara, Erin A.
United States, Cambridge
Massachusetts Institute of Technology
Pasham, Dheeraj R.
United States, Cambridge
Massachusetts Institute of Technology
Remillard, Ronald A.
United States, Cambridge
Massachusetts Institute of Technology
Steiner, James F.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Stevens, Abigail L.
United States, East Lansing
Michigan State University
United States, Ann Arbor
University of Michigan, Ann Arbor
Uttley, Philip
Netherlands, Amsterdam
Universiteit Van Amsterdam
Statistics
Citations: 40
Authors: 15
Affiliations: 12
Identifiers
Doi:
10.3847/2041-8213/ab7932
ISSN:
20418205