English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Limiting eccentricity of subparsec massive black hole binaries surrounded by self-gravitating gas discs

Roedig, C., Dotti, M., Sesana, A., Cuadra, J., & Colpi, M. (2011). Limiting eccentricity of subparsec massive black hole binaries surrounded by self-gravitating gas discs. Monthly Notices of the Royal Astronomical Society, 415, 3033-3041. doi:10.1111/j.1365-2966.2011.18927.x.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-0AE9-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-8FE8-5
Genre: Journal Article

Files

show Files
hide Files
:
1104.3868 (Preprint), 915KB
Name:
1104.3868
Description:
File downloaded from arXiv at 2011-07-18 13:22
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
:
MNRAS.18927.x.pdf (Any fulltext), 2MB
Name:
MNRAS.18927.x.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Roedig, Constanze1, Author              
Dotti, Massimo, Author              
Sesana, Alberto2, Author              
Cuadra, Jorge, Author
Colpi, Monica, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              
2High Energy Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159881              

Content

show
hide
Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: We study the dynamics of supermassive black hole binaries embedded in circumbinary gaseous discs, with the SPH code Gadget-2. The sub-parsec binary (of total mass M and mass ratio q=1/3) has excavated a gap and transfers its angular momentum to the self--gravitating disc (M_disc=0.2 M). We explore the changes of the binary eccentricity e, by simulating a sequence of binary models that differ in the initial eccentricity e_0, only. In initially low-eccentric binaries, the eccentricity increases with time, while in high-eccentric binaries e declines, indicating the existence of a limiting eccentricity e_crit that is found to fall in the interval [0.6,0.8]. We also present an analytical interpretation for this saturation limit. An important consequence of the existence of e_crit is the detectability of a significant residual eccentricity e_LISA} by the proposed gravitational wave detector LISA. It is found that at the moment of entering the LISA frequency domain e_LISA ~ 10^{-3}-10^{-2}; a signature of its earlier coupling with the massive circumbinary disc. We also observe large periodic inflows across the gap, occurring on the binary and disc dynamical time scales rather than on the viscous time. These periodic changes in the accretion rate (with amplitudes up to ~100%, depending on the binary eccentricity) can be considered a fingerprint of eccentric sub-parsec binaries migrating inside a circumbinary disc.

Details

show
hide
Language(s):
 Dates: 2011-04-192011-04-222011-07-182011
 Publication Status: Published in print
 Pages: 10 pages, 7 figures, accepted for publication in MNRAS
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1104.3868
DOI: 10.1111/j.1365-2966.2011.18927.x
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Blackwell Science
Pages: - Volume / Issue: 415 Sequence Number: - Start / End Page: 3033 - 3041 Identifier: ISSN: 1365-8711
CoNE: /journals/resource/1000000000024150