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Svanik Tandon (Columbia University)10/10/2025, 13:55
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Jason Alford (NYU)10/10/2025, 14:10Topic Talk
We investigate the origin of unidentified, extended TeV source 1LHAASO J0500+4454, considering three possible origins: cosmic rays interacting with a molecular cloud (MC), particles accelerated in a currently undetected supernova remnant (SNR), and an energetic outflow powered by a pulsar.
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Upper limits on the CO and X-ray emission from the $\gamma$-ray emitting region disfavor the MC and SNR... -
Jaegeun Park (Chungbuk National University)10/10/2025, 14:25Topic Talk
TeV gamma-ray binaries (TGBs) are rare, high-mass systems capable of accelerating particles to energies >10 TeV. Among them, HESS J0632+057, a candidate pulsar–Be star binary, stands out as a promising source, exhibiting phase-dependent X-ray and TeV flares. These phase-dependent flares can provide new insights into pulsar–disk interactions.
We present results from a new multi-wavelength...
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Eduardo De La Fuente Acosta, Montserrat Montiel Dücker Romero (Instituto Tecnológico y de Estudios Superiores de Monterrey), Montserrat Montiel Dücker Romero10/10/2025, 14:40
The HAWC observatory detected ฆร-ray emission from the microquasar V4641 Sgr ($\gt$ 200 TeV) and revealed a $\sim$ 100 pc bubble, indicating PeV--scale particle acceleration; LHAASO subsequently extended the spectrum to ~0.8 PeV. In IR--mm data, we identify a millimeter clump $\sim$ 20$'$ from the microquasar, report its position and basic properties, and assess any spatial/kinematic...
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Marco Tavani10/10/2025, 14:55
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Matthew Lundy (Columbia University)10/10/2025, 15:40Topic Talk
The recent LHAASO survey has revealed a new population of >25 TeV sources in the Northern Hemisphere, including several PeVatron candidates without clear counterparts at lower energies. These “TeV-only” sources present a critical test for models of Galactic particle acceleration. VERITAS, with its superior angular resolution and sensitivity between 100 GeV and 25 TeV, is well positioned to...
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Dezhi Huang10/10/2025, 15:55Topic Talk
The eHWC J1825-134 region, located in the southern field of view of the High-Altitude Water Cherenkov (HAWC) observatory, is among the most complex gamma-ray emission sites on the Galactic plane. This region hosts several potential PeVatron candidates capable of accelerating particles to PeV energies. Disentangling the overlapping gamma-ray emission and linking it to specific accelerators is...
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Paolo Coppi10/10/2025, 16:10
Extreme particle acceleration usually involves magnetic fields and thus is inevitably accompanied by synchrotron emission from the accelerated particles.
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Measurement of this emission, including its polarization, can break model degeneracies and place important constraints on the physical mechanisms operating in a pevatron source.
I will briefly review some of the constraints and then... -
Nilay Mancini10/10/2025, 16:25Topic Talk
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Andrea Giuliani10/10/2025, 16:40
The ASTRI Mini-Array is an array of nine Cherenkov telescopes under construction at the Teide Astronomical Observatory in Tenerife, Spain. Its Schwarzchild-Couder double-mirror optical design allows its camera to cover a large field of view (∼10 degrees in diameter), providing good gamma-ray sensitivity and angular resolution in the multi-TeV range and beyond (up to ∼200 TeV). This will...
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Jamie Holder10/10/2025, 16:55
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Kaya Mori (Columbia University), Prof. Reshmi Mukherjee (Barnard College, Columbia University)10/10/2025, 17:15
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