Orbital motion in the radio galaxy 3C 66B: evidence for a supermassive black hole binary.
Reads0
Chats0
TLDR
Using the very-long-baseline interferometer, it is found that the unresolved radio core of 3C 66B shows well-defined elliptical motions with a period of 1.05 ± 0.03 years, which provides a direct detection of a supermassive black hole binary.Abstract:
Supermassive black hole binaries may exist in the centers of active galactic nuclei such as quasars and radio galaxies, and mergers between galaxies may result in the formation of supermassive binaries during the course of galactic evolution. Using the very-long-baseline interferometer, we imaged the radio galaxy 3C 66B at radio frequencies and found that the unresolved radio core of 3C 66B shows well-defined elliptical motions with a period of 1.05 ± 0.03 years, which provides a direct detection of a supermassive black hole binary.read more
Citations
More filters
Journal ArticleDOI
A super massive black hole binary in 3C 66B: Future observational perspectives
TL;DR: In this paper, the existence of a supermassive black hole binary in the radio galaxy 3C 66B has been investigated using VLBI observations, which suggests the presence of a couple of massive black holes in the center of the galaxy.
Journal ArticleDOI
Gravitational wave astronomy
TL;DR: In this article, the authors review the status of current gravitational-wave detectors, possible types of sources, observational upper limits achieved, and future prospects for direct detection of gravitational waves.
Journal ArticleDOI
Pulsar timing array observations of gravitational wave source timing parallax
Xihao Deng,Lee Samuel Finn +1 more
TL;DR: In this article, the authors evaluate the PTA response to gravitational wave point sources including the important wavefront curvature effects and show that the response is sensitive to the source parallax across the pulsar-Earth baseline.
Journal ArticleDOI
Proper motion of the sub-parsec-scale jet in the radio galaxy 3c 66b
Hiroshi Sudou,Satoru Iguchi +1 more
TL;DR: In this paper, the proper motion of the sub-parsec-scale jet in a nearby elliptical galaxy 3C 66B was studied at 2.3 GHz and 8.4 GHz at 10 epochs over four years, using the Very Long Baseline Array for all epochs and the Effelsberg 100 m telescope for the last epoch.
Journal ArticleDOI
Determination of Central Engine Position and Accretion Disk Structure in NGC 4261 by Core Shift Measurements
Takafumi Haga,Akihiro Doi,Akihiro Doi,Yasuhiro Murata,Yasuhiro Murata,Hiroshi Sudou,Seiji Kameno,Kazuhiro Hada +7 more
TL;DR: In this paper, the authors measured radio core positions showing observing frequency dependences (known as "core shift") in both approaching jets and counter jets and obtained spectral index maps, which indicate that emission from the counter jet is affected by free-free absorption (FFA).
References
More filters
Journal ArticleDOI
Inward Bound—The Search for Supermassive Black Holes in Galactic Nuclei
TL;DR: In this paper, the authors review dynamical search techniques, the robustness of the evidence, and BH demographics, and find that supermassive black holes are present in 20% of nearby E-Sbc galaxies.
Journal ArticleDOI
Ultraluminous infrared galaxies and the origin of quasars
David B. Sanders,B. T. Soifer,J. H. Elias,Barry F. Madore,Keith Matthews,G. Neugebauer,Nick Scoville +6 more
TL;DR: In this article, ground-based observations of a complete sample of 10 of these infrared galaxies suggest that they represent the initial dust-enshrouded stages of quasars, and a second group of ultraluminous objects selected on the basis of warm infrared colors are found to be preferentially Seyfert galaxies.
Book
Interferometry and Synthesis in Radio Astronomy
TL;DR: In this paper, a theory of interferometry and synthesis imaging analysis of the Interferometer Response Geometric Relationships and Polarimetry Antennas and Arrays Response of the receiving system Design of the Analog Receiving System Digital Signal Processing Very-Long-Baseline Interferometry Calibration and Fourier Transformation of Visibility Data Deconvolution, Adaptive Calibrration, and Applications Interferometers Techniques for Astrometry and Geodesy Propagation Effects Van Cittert-Zernike Theorem, Spatial Coherence, and
Journal ArticleDOI
Massive black hole binaries in active galactic nuclei
TL;DR: In this article, the authors explore the possibility that some active galactic nuclei may contain two massive black holes in orbit about each other, which suggests a new interpretation for the observed bending and apparent precession of radio jets emerging from these objects.