The Linear Polarization of Sagittarius A* II. VLA and BIMA Polarimetry at 22, 43 and 86 GHz

Abstract

We present a search for linear polarization at 22 GHz, 43 GHz and 86 GHz from the nearest super massive black hole candidate, Sagittarius A*. We find upper limits to the linear polarization of 0.2%, 0.4% and 1%, respectively. These results strongly support the conclusion of our centimeter wavelength spectro-polarimetry that Sgr A* is not depolarized by the interstellar medium but is in fact intrinsically depolarized.

Accepted for publication in ApJ, 13 pages, 2 figures

References in corpus (3)

• Detection of Circular Polarization in the Galactic Center Black Hole Candidate Sagittarius A*
• What is the Accretion Rate in Sgr A*?
• The Linear Polarization of Sagittarius A* I. VLA Spectro-polarimetry at 4.8 and 8.4 GHz

Cited by in corpus (34)

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• Nonthermal Electrons in Radiatively Inefficient Accretion Flow Models of Sagittarius A*
• The Supermassive Black Hole at the Galactic Center
• An Unambiguous Detection of Faraday Rotation in Sagittarius A*
• Interferometric Detection of Linear Polarization from Sagittarius A* at 230 GHz
• Resolved Magnetic-Field Structure and Variability Near the Event Horizon of Sagittarius A*
• Interferometric Measurements of Variable 340 GHz Linear Polarization in Sagittarius A*
• Polarimetry of near-infrared flares from Sagittarius A*
• Constraining the Accretion Rate Onto Sagittarius A* Using Linear Polarization
• Sagittarius A* Accretion Flow and Black Hole Parameters from General Relativistic Dynamical and Polarized Radiative Modeling
• Towards the event horizon -- the supermassive black hole in the Galactic Center
• Sgr A* Polarization: No ADAF, Low Accretion Rate, and Non-Thermal Synchrotron Emission
• Polarimetric properties of Event Horizon Telescope targets from ALMA
• The Spectrum and Variability of Circular Polarization in Sagittarius A* from 1.4 to 15 GHz
• Circular Polarization of Radio Emission from Relativistic Jets
• Faraday rotation in GRMHD simulations of the jet launching zone of M87
• Variable Linear Polarization from Sagittarius A*: Evidence for a Hot Turbulent Accretion Flow
• The Rotation Measure and 3.5mm Polarization of Sgr A*
• ALMA Polarimetry of Sgr A*: Probing the Accretion Flow from the Event Horizon to the Bondi Radius
• The Submillimeter Polarization of Sgr A*
• Polarized mm And sub-mm Emission From Sgr A* At The Galactic Center
• The Circular Polarization of Sagittarius A* at Submillimeter Wavelengths
• Detecting Changing Polarization Structures in Sagittarius A* with High Frequency VLBI
• BIMA Observations of Linear Polarization in Sagittarius A* at 112 GHz
• Detection of Circular Polarization in M81*
• The Variability of Polarized Radiation from Sgr A*
• Linearly Polarized Millimeter and Submillimeter Continuum Emission of Sgr A* Constrained by ALMA
• The internal Faraday screen of Sagittarius A*
• The 492 GHz emission of Sgr A* constrained by ALMA
• Radio Linear and Circular Polarization from M81*
• Polarized signatures of adiabatically expanding hotspots in Sgr A*'s accretion flow
• Linear and Circular Polarization from Sagittarius A* and M81*
• Flare emission from Sagittarius A*