High energy radiation from jets and accretion disks near rotating black holes

Simple item page
dc.contributor.authorO'Riordan, Michael
dc.contributor.authorPe'er, Asaf
dc.contributor.authorMcKinney, Jonathan C.
dc.contributor.editorAharonian, Felix A.
dc.contributor.editorHofmann, Werner
dc.contributor.editorRieger, Frank M.
dc.contributor.funderIrish Research Councilen
dc.contributor.funderSeventh Framework Programmeen
dc.contributor.funderNational Aeronautics and Space Administrationen
dc.contributor.funderNational Science Foundationen
dc.date.accessioned2017-05-12T09:50:33Z
dc.date.available2017-05-12T09:50:33Z
dc.date.issued2017-01
dc.date.updated2017-05-12T09:03:04Z
dc.description.abstractWe model the low/hard state in X-ray binaries as a magnetically arrested accretion flow, and calculate the resulting radiation using a general-relativistic radiative transport code. Firstly, we investigate the origin of the high-energy emission. We find the following indications of a significant jet contribution at high energies: (i) a pronounced γ-ray peak at ∼ 1023 Hz, (ii) a break in the optical/UV band where the spectrum changes from disk to jet dominated, and (iii) a low-frequency synchrotron peak ≲ 1014 Hz implies that a significant fraction of any observed X-ray and γ-ray emission originates in the jet. Secondly, we investigate the effects of black hole spin on the high-energy emission. We find that the X-ray and γ-ray power depend strongly on spin and inclination angle. Surprisingly, this dependence is not a result of the Blandford-Znajek mechanism, but instead can be understood as a redshift effect. For rapidly rotating black holes, observers with large inclinations see deeper into the hot, dense, highly-magnetized inner regions of the accretion flow. Since the lower frequency emission originates at larger radii, it is not significantly affected by the spin. Therefore, the ratio of the X-ray to near-infrared power is an observational probe of black hole spin.en
dc.description.sponsorshipIrish Research Council (Grant Number GOIPG/2013/315); National Aeronautics and Space Administration/National Science Foundation/Theoretical and Computational Astrophysics Networks (TCAN)(NNX14AB46G); National Science Foundation/ The Extreme Science and Engineering Discovery Environment/ Texas Advanced Computing Center (TGPHY120005); National Aeronautics and Space Administration/ Pleiades (SMD-14-5451)en
dc.description.statusPeer revieweden
dc.description.urihttps://www.mpi-hd.mpg.de/hd2016/pages/news.phpen
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid040042
dc.identifier.citationO’Riordan, M., Pe’er, A. and McKinney, J.C. (2017) ‘High energy radiation from jets and accretion disks near rotating black holes’, AIP Conference Proceedings 1792, 040042, (6pp). doi: 10.1063/1.4968946en
dc.identifier.doi10.1063/1.4968946
dc.identifier.endpage6en
dc.identifier.issn0094-243X
dc.identifier.journaltitleAIP Conference Proceedingsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/3952
dc.identifier.volume1792en
dc.language.isoenen
dc.publisherAmerican Institute of Physics Publishingen
dc.relation.ispartof6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma2016)
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/618499/EU/Transient-Sky/TRANSIENT-SKY
dc.rights© 2017, the Authors. Reproduced with the permission of AIP Publishing from AIP Conference Proceedings 1792, 040042 (2017); doi: 10.1063/1.4968946en
dc.subjectSpinen
dc.subjectBlack holeen
dc.subjectRadiationen
dc.subjectEmissionen
dc.titleHigh energy radiation from jets and accretion disks near rotating black holesen
dc.typeConference itemen
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2290.pdf
Size:
352.48 KB
Format:
Adobe Portable Document Format
Description:
Published Version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Physics - Conference Items