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DTSTART:20250330T010000
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DTSTART;TZID=Europe/Rome:20250228T143000
DTEND;TZID=Europe/Rome:20250228T160000
DTSTAMP:20260422T032815
CREATED:20250218T095636Z
LAST-MODIFIED:20250218T095636Z
UID:38989-1740753000-1740758400@w3.lnf.infn.it
SUMMARY:Searching for Axion Dark Matter with Radio Telescopes
DESCRIPTION:Speaker: Prof. Luca Visinelli (Shanghai Jiao Tong University) \nThe QCD axion\, originally proposed to resolve the strong CP problem\, is also a compelling dark matter (DM) candidate. In strong magnetic fields\, such as those surrounding neutron stars\, axions can convert into photons\, potentially generating detectable radio signals. This axion-photon coupling offers a unique avenue for experimental searches in a well-defined mass range. In this seminar\, I will present an observational study using the Green Bank Telescope (GBT) to search for transient radio signals from axion-photon conversion. Focusing on the core of Andromeda\, we employ the VErsatile GBT Astronomical Spectrometer (VEGAS) and the X-band receiver (8–10 GHz) to probe axions with masses between 33 and 42 μeV\, achieving a mass resolution of 3.8 × 10^-4 μeV. We describe our observational strategy and analysis techniques\, which reach an instrumental sensitivity of 2 mJy per spectral channel. While no candidate signals exceeding the 5σ threshold were detected\, I will discuss future improvements\, including expanding the search to additional frequency bands and refining theoretical models\, to strengthen constraints on axion DM scenarios.
URL:/event/searching-for-axion-dark-matter-with-radio-telescopes/
LOCATION:Aula Seminari\, Via Enrico Fermi\, 40\, Frascati\, Roma\, 00044\, Italia
CATEGORIES:Seminari teorici
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