How bright are the gaps in circumbinary disk systems?

Abstract

When a circumbinary disk surrounds a binary whose secondary's mass is at least $\sim 10^{-2}\times$ the primary's mass, a nearly empty cavity with radius a few times the binary separation is carved out of the disk. Narrow streams of material pass from the inner edge of the circumbinary disk into the domain of the binary itself, where they eventually join onto the small disks orbiting the members of the binary. Using data from 3-d MHD simulations of this process, we determine the luminosity of these streams; it is mostly due to weak laminar shocks, and is in general only a few percent of the luminosity of adjacent regions of either the circumbinary disk or the "mini-disks". This luminosity therefore hardly affects the deficit in the thermal continuum predicted on the basis of a perfectly dark gap region.

ApJ accepted

References in corpus (25)

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• HD 169142 in the eyes of ZIMPOL/SPHERE
• Preventing Anomalous Torques in Circumbinary Accretion Simulations
• A machine learns to predict the stability of circumbinary planets
• Population Estimates for Electromagnetically-Distinguishable Supermassive Binary Black Holes
• Self-lensing flares from black hole binaries II: observing black hole shadows via light-curve tomography
• Galaxy fields of LISA massive black hole mergers in a simulated Universe
• The BAT AGN Spectroscopic Survey -- XVIII. Searching for Supermassive Black Hole Binaries in the X-rays
• Dynamical evidence of the sub-parsec counter-rotating disc for a close binary of supermassive black holes in the nucleus of NGC 1068
• Orbital stability of compact three-planet systems, I: Dependence of system lifetimes on initial orbital separations and longitudes
• Changing-Look Inspirals: Trends and Switches in AGN Disk Emission as Signposts for Merging Black Hole Binaries
• Impact of a binary black hole on its outer circumbinary disc
• Astrophysics with the Laser Interferometer Space Antenna
• Spectral Energy Distribution profiles from AGN accretion disc in multi-gap setup
• A Population Study for Searching Supermassive Binary Black Holes in Active Galactic Nuclei: Continuum Spectral Features and Periodic Variabilities
• Misaligned Spinning Binary Black Hole Mergers in Hot Magnetized Plasma