A high-frequency doppler feature in the power spectra of simulated grmhd black hole accretion disks

Sarah Wellons, Yucong Zhu, Dimitrios Psaltis, Ramesh Narayan, Jeffrey E. McClintock

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Black hole binaries exhibit a wide range of variability phenomena, from large-scale state changes to broadband noise and quasi-periodic oscillations, but the physical nature of much of this variability is poorly understood. We examine the variability properties of three GRMHD simulations of thin accretion disks around black holes of varying spin, producing light curves and power spectra as would be seen by observers. We find that the simulated power spectra show a broad feature at high frequency, which increases in amplitude with the inclination of the observer. We show that this high-frequency feature is a product of the Doppler effect and that its location is a function of the mass and spin of the black hole. This Doppler feature demonstrates that power spectral properties of the accretion disk can be tied to, and potentially used to determine, physical properties of the black hole.

Original languageEnglish (US)
Article number142
JournalAstrophysical Journal
Volume785
Issue number2
DOIs
StatePublished - Apr 20 2014

Fingerprint

accretion disks
power spectra
accretion
Doppler effect
physical property
oscillation
light curve
inclination
simulation
physical properties
broadband
oscillations
products
product

Keywords

  • accretion, accretion disks
  • black hole physics
  • X-rays: binaries

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

A high-frequency doppler feature in the power spectra of simulated grmhd black hole accretion disks. / Wellons, Sarah; Zhu, Yucong; Psaltis, Dimitrios; Narayan, Ramesh; McClintock, Jeffrey E.

In: Astrophysical Journal, Vol. 785, No. 2, 142, 20.04.2014.

Research output: Contribution to journalArticle

Wellons, Sarah ; Zhu, Yucong ; Psaltis, Dimitrios ; Narayan, Ramesh ; McClintock, Jeffrey E. / A high-frequency doppler feature in the power spectra of simulated grmhd black hole accretion disks. In: Astrophysical Journal. 2014 ; Vol. 785, No. 2.
@article{0b04a7bb28a74d2981291e28d573569a,
title = "A high-frequency doppler feature in the power spectra of simulated grmhd black hole accretion disks",
abstract = "Black hole binaries exhibit a wide range of variability phenomena, from large-scale state changes to broadband noise and quasi-periodic oscillations, but the physical nature of much of this variability is poorly understood. We examine the variability properties of three GRMHD simulations of thin accretion disks around black holes of varying spin, producing light curves and power spectra as would be seen by observers. We find that the simulated power spectra show a broad feature at high frequency, which increases in amplitude with the inclination of the observer. We show that this high-frequency feature is a product of the Doppler effect and that its location is a function of the mass and spin of the black hole. This Doppler feature demonstrates that power spectral properties of the accretion disk can be tied to, and potentially used to determine, physical properties of the black hole.",
keywords = "accretion, accretion disks, black hole physics, X-rays: binaries",
author = "Sarah Wellons and Yucong Zhu and Dimitrios Psaltis and Ramesh Narayan and McClintock, {Jeffrey E.}",
year = "2014",
month = "4",
day = "20",
doi = "10.1088/0004-637X/785/2/142",
language = "English (US)",
volume = "785",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - A high-frequency doppler feature in the power spectra of simulated grmhd black hole accretion disks

AU - Wellons, Sarah

AU - Zhu, Yucong

AU - Psaltis, Dimitrios

AU - Narayan, Ramesh

AU - McClintock, Jeffrey E.

PY - 2014/4/20

Y1 - 2014/4/20

N2 - Black hole binaries exhibit a wide range of variability phenomena, from large-scale state changes to broadband noise and quasi-periodic oscillations, but the physical nature of much of this variability is poorly understood. We examine the variability properties of three GRMHD simulations of thin accretion disks around black holes of varying spin, producing light curves and power spectra as would be seen by observers. We find that the simulated power spectra show a broad feature at high frequency, which increases in amplitude with the inclination of the observer. We show that this high-frequency feature is a product of the Doppler effect and that its location is a function of the mass and spin of the black hole. This Doppler feature demonstrates that power spectral properties of the accretion disk can be tied to, and potentially used to determine, physical properties of the black hole.

AB - Black hole binaries exhibit a wide range of variability phenomena, from large-scale state changes to broadband noise and quasi-periodic oscillations, but the physical nature of much of this variability is poorly understood. We examine the variability properties of three GRMHD simulations of thin accretion disks around black holes of varying spin, producing light curves and power spectra as would be seen by observers. We find that the simulated power spectra show a broad feature at high frequency, which increases in amplitude with the inclination of the observer. We show that this high-frequency feature is a product of the Doppler effect and that its location is a function of the mass and spin of the black hole. This Doppler feature demonstrates that power spectral properties of the accretion disk can be tied to, and potentially used to determine, physical properties of the black hole.

KW - accretion, accretion disks

KW - black hole physics

KW - X-rays: binaries

UR - http://www.scopus.com/inward/record.url?scp=84897980058&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897980058&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/785/2/142

DO - 10.1088/0004-637X/785/2/142

M3 - Article

AN - SCOPUS:84897980058

VL - 785

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 142

ER -