SIMBAD references

2017ApJ...834...90H - Astrophys. J., 834, 90-90 (2017/January-1)

Detection of very low-frequency, quasi-periodic oscillations In the 2015 outburst of V404 Cygni.

HUPPENKOTHEN D., YOUNES G., INGRAM A., KOUVELIOTOU C., GOGUS E., BACHETTI M., SANCHEZ-FERNANDEZ C., CHENEVEZ J., MOTTA S., VAN DER KLIS M., GRANOT J., GEHRELS N., KUULKERS E., TOMSICK J.A. and WALTON D.J.

Abstract (from CDS):

In 2015 June, the black hole X-ray binary (BHXRB) V404 Cygni went into outburst for the first time since 1989. Here, we present a comprehensive search for quasi-periodic oscillations (QPOs) of V404 Cygni during its recent outburst, utilizing data from six instruments on board five different X-ray missions: Swift/XRT, Fermi/GBM, Chandra/ACIS, INTEGRAL's IBIS/ISGRI and JEM-X, and NuSTAR. We report the detection of a QPO at 18 mHz simultaneously with both Fermi/GBM and Swift/XRT, another example of a rare but slowly growing new class of mHz-QPOs in BHXRBs linked to sources with a high orbital inclination. Additionally, we find a duo of QPOs in a Chandra/ACIS observation at 73 mHz and 1.03 Hz, as well as a QPO at 136 mHz in a single Swift/XRT observation that can be interpreted as standard Type-C QPOs. Aside from the detected QPOs, there is significant structure in the broadband power, with a strong feature observable in the Chandra observations between 0.1 and 1 Hz. We discuss our results in the context of current models for QPO formation.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): methods: statistical - relativistic processes - stars: black holes - X-rays: binaries - X-rays: binaries

Status at CDS:  

Simbad objects: 11

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2020.06.07-01:00:16

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