![]() ![]() The azimuthal distribution of EVPA measured by the EHT to study theĪxion-photon coupling. ![]() For a nearly face-on M87$^\star$, this oscillation in the EVPAĪppears as a propagating wave along the photon ring. Oscillation in the electric vector position angle (EVPA) of this linear This builds upon the EHT principally by deploying additional modest-diameter. The presence of an axion cloud leads to a frequency-independent We outline a process to design, architect, and implement the next-generation Event Horizon Telescope (ngEHT): a transformative enhancement to the EHT, that will form a networked global array of radio dishes capable of making high-fidelity real-time movies of supermassive black holes (SMBH) and their emanating jets. Tests of the existence of a dense axion cloud produced by a spinning black Recently, the linear polarization of radiation emitted near the supermassiveīlack hole M87$^\star$ was measured on four separate days, precisely enabling (EHT) has created exciting opportunities in the search for new physics. Download a PDF of the paper titled Stringent axion constraints with Event Horizon Telescope polarimetric measurements of M87$^\star$, by Yifan Chen and 7 other authors Download PDF Abstract: The hitherto unprecedented angular resolution of the Event Horizon Telescope We outline a process to design, architect, and implement the next-generation Event Horizon Telescope (ngEHT): a transformative enhancement to the EHT, that will form a networked global array of radio dishes capable of making high-fidelity real-time movies of supermassive black holes (SMBH) and their emanating jets. ![]()
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