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A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni

A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni
A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni

Observations of binary stars containing an accreting black hole or neutron star often show x-ray emission extending to high energies (>10 kilo­–electron volts), which is ascribed to an accretion disk corona of energetic particles akin to those seen in the solar corona. Despite their ubiquity, the physical conditions in accretion disk coronae remain poorly constrained. Using simultaneous infrared, optical, x-ray, and radio observations of the Galactic black hole system V404 Cygni, showing a rapid synchrotron cooling event in its 2015 outburst, we present a precise 461 ± 12 gauss magnetic field measurement in the corona. This measurement is substantially lower than previous estimates for such systems, providing constraints on physical models of accretion physics in black hole and neutron star binary systems.

This article has a correction. Please see: http://science.sciencemag.org/content/360/6386/eaat9270

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Dallilar, Yigit, Eikenberry, Stephen S., Garner, Alan, Stelter, Richard D., Gottlieb, Amy, Gandhi, Poshak, Casella, Piergiorgio, Dhillon, Vik S., Marsh, Tom R., Littlefair, Stuart P., Hardy, Liam, Fender, Rob, Mooley, Kunal, Walton, Dominic J., Fuerst, Felix, Bachetti, Matteo, Castro-Tirado, A. J., Charcos, Miguel, Edwards, Michelle L., Lasso-Cabrera, Nestor M., Marin-Franch, Antonio, Raines, S. Nicholas, Ackley, Kendall, Bennett, John G., Cenarro, A. Javier, Chinn, Brian, Donoso, H. Veronica, Frommeyer, Raymond, Hanna, Kevin, Herlevich, Michael D., Julian, Jeff, Miller, Paola, Mullin, Scott, Murphey, Charles H., Packham, Chris, Varosi, Frank, Vega, Claudia, Warner, Craig, Ramaprakash, A.N., Burse, Mahesh, Punnadi, Sujit, Chordia, Pravin, Gerarts, Andreas, De Paz Martín, Héctor, Calero, María Martín, Scarpa, Riccardo, Acosta, Sergio Fernandez, Hernández Sánchez, William Miguel, Siegel, Benjamin, Pérez, Francisco Francisco, Viera Martín, Himar D., Rodríguez Losada, José A., Nuñez, Agustín, Tejero, Álvaro, Martín González, Carlos E., Rodríguez, César Cabrera, Molgó, Jordi, Rodriguez, J. Esteban, Cáceres, J. Israel Fernández, Rodríguez García, Luis A., Lopez, Manuel Huertas, Dominguez, Raul, Gaggstatter, Tim, Lavers, Antonio Cabrera, Geier, Stefan, Pessev, Peter and Sarajedini, Ata (2017) A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni. Science, 358 (6368), 1299-1302. (doi:10.1126/science.aan0249).

Record type: Article

Abstract

Observations of binary stars containing an accreting black hole or neutron star often show x-ray emission extending to high energies (>10 kilo­–electron volts), which is ascribed to an accretion disk corona of energetic particles akin to those seen in the solar corona. Despite their ubiquity, the physical conditions in accretion disk coronae remain poorly constrained. Using simultaneous infrared, optical, x-ray, and radio observations of the Galactic black hole system V404 Cygni, showing a rapid synchrotron cooling event in its 2015 outburst, we present a precise 461 ± 12 gauss magnetic field measurement in the corona. This measurement is substantially lower than previous estimates for such systems, providing constraints on physical models of accretion physics in black hole and neutron star binary systems.

This article has a correction. Please see: http://science.sciencemag.org/content/360/6386/eaat9270

This record has no associated files available for download.

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Accepted/In Press date: 3 November 2017
e-pub ahead of print date: 8 December 2017
Published date: 8 December 2017
Related URLs:
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Identifiers

Local EPrints ID: 417773
URI: http://eprints.soton.ac.uk/id/eprint/417773
DOI: doi:10.1126/science.aan0249
ISSN: 0036-8075
PURE UUID: 07adeb19-3aa2-4174-9aab-0f1df982a902
ORCID for Poshak Gandhi: ORCID iD orcid.org/0000-0003-3105-2615

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Date deposited: 13 Feb 2018 17:30
Last modified: 16 Mar 2024 04:20

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Contributors

Author: Yigit Dallilar
Author: Stephen S. Eikenberry
Author: Alan Garner
Author: Richard D. Stelter
Author: Amy Gottlieb
Author: Poshak Gandhi ORCID iD
Author: Piergiorgio Casella
Author: Vik S. Dhillon
Author: Tom R. Marsh
Author: Stuart P. Littlefair
Author: Liam Hardy
Author: Rob Fender
Author: Kunal Mooley
Author: Dominic J. Walton
Author: Felix Fuerst
Author: Matteo Bachetti
Author: A. J. Castro-Tirado
Author: Miguel Charcos
Author: Michelle L. Edwards
Author: Nestor M. Lasso-Cabrera
Author: Antonio Marin-Franch
Author: S. Nicholas Raines
Author: Kendall Ackley
Author: John G. Bennett
Author: A. Javier Cenarro
Author: Brian Chinn
Author: H. Veronica Donoso
Author: Raymond Frommeyer
Author: Kevin Hanna
Author: Michael D. Herlevich
Author: Jeff Julian
Author: Paola Miller
Author: Scott Mullin
Author: Charles H. Murphey
Author: Chris Packham
Author: Frank Varosi
Author: Claudia Vega
Author: Craig Warner
Author: A.N. Ramaprakash
Author: Mahesh Burse
Author: Sujit Punnadi
Author: Pravin Chordia
Author: Andreas Gerarts
Author: Héctor De Paz Martín
Author: María Martín Calero
Author: Riccardo Scarpa
Author: Sergio Fernandez Acosta
Author: William Miguel Hernández Sánchez
Author: Benjamin Siegel
Author: Francisco Francisco Pérez
Author: Himar D. Viera Martín
Author: José A. Rodríguez Losada
Author: Agustín Nuñez
Author: Álvaro Tejero
Author: Carlos E. Martín González
Author: César Cabrera Rodríguez
Author: Jordi Molgó
Author: J. Esteban Rodriguez
Author: J. Israel Fernández Cáceres
Author: Luis A. Rodríguez García
Author: Manuel Huertas Lopez
Author: Raul Dominguez
Author: Tim Gaggstatter
Author: Antonio Cabrera Lavers
Author: Stefan Geier
Author: Peter Pessev
Author: Ata Sarajedini

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