Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Ng, Kenny"'
The magnetic fields that emerge from beneath the solar surface and permeate the solar atmosphere are the key drivers of space weather and, thus, understanding them is important to human society. Direct observations, used to measure magnetic fields, c
Externí odkaz:
http://arxiv.org/abs/2405.17549
Many well motivated dark matter (DM) particle candidates can decay into detectable X-ray photons. We analyze the Final Equatorial Depth Survey (eFEDS) data from eROSITA early data release to search for unidentified X-ray lines that could indicate DM
Externí odkaz:
http://arxiv.org/abs/2401.16747
Autor:
Leung, Dylan M. H., Ng, Kenny C. Y.
The particle nature of dark matter (DM) has been a long-lasting mystery. Many models suggest that DM could decay or self annihilate into standard model particles, and thus could be a source of gamma rays in the sky. The High Altitude Water Cherenkov
Externí odkaz:
http://arxiv.org/abs/2312.08989
Autor:
Liu, Qishan, Ng, Kenny C. Y.
Primordial black holes~(PBHs) formed in the early Universe are well-motivated dark matter~(DM) candidates over a wide range of masses. These PBHs could emit detectable signals in the form of photons, electrons, and neutrinos through Hawking radiation
Externí odkaz:
http://arxiv.org/abs/2312.06108
Autor:
Lai, Anderson C. M., Ng, Kenny C. Y.
Interactions between photons and electrons are ubiquitous in astrophysics. Photons can be down scattered (Compton scattering) or up scattered (inverse Compton scattering) by moving electrons. Inverse Compton scattering, in particular, is an essential
Externí odkaz:
http://arxiv.org/abs/2211.15691
Autor:
Roach, Brandon M., Rossland, Steven, Ng, Kenny C. Y., Perez, Kerstin, Beacom, John F., Grefenstette, Brian W., Horiuchi, Shunsaku, Krivonos, Roman, Wik, Daniel R.
Publikováno v:
Phys. Rev. D 107, 023009 (2023)
We present two complementary NuSTAR x-ray searches for keV-scale dark matter decaying to mono-energetic photons in the Milky Way halo. In the first, we utilize the known intensity pattern of unfocused stray light across the detector planes -- the dom
Externí odkaz:
http://arxiv.org/abs/2207.04572
Publikováno v:
Phys. Rev. D 106, 123026 (2022)
Warm dark matter (WDM) can potentially explain small-scale observations that currently challenge the cold dark matter (CDM) model, as warm particles suppress structure formation due to free-streaming effects. Observing small-scale matter distribution
Externí odkaz:
http://arxiv.org/abs/2111.13137
Autor:
Ando, Shin'ichiro, Barik, Suvendu K., Feng, Zhuoran, Finetti, Marco, Chaves, Andreas Guerra, Kanuri, Sahaja, Kleverlaan, Jorinde, Ma, Yixuan, Di Serracapriola, Nicolo Maresca, Meinema, Matthew S. P., Martinez, Imanol Navarro, Ng, Kenny C. Y., Peerbooms, Ebo, van Veen, Casper A., Zimmer, Fabian
Publikováno v:
Phys. Rev. D 104, 023022 (2021)
Dwarf spheroidal galaxies are dark matter dominated systems, and as such, ideal for indirect dark matter searches. If dark matter decays into high-energy photons in the dwarf galaxies, they will be a good target for current and future generations of
Externí odkaz:
http://arxiv.org/abs/2103.13242
Publikováno v:
Phys. Rev. D 104, 023021 (2021)
Dark matter might be made of "warm" particles, such as sterile neutrinos in the keV mass range, which can decay into photons through mixing and are consequently detectable by X-ray telescopes. Axionlike particles (ALPs) are detectable by X-ray telesc
Externí odkaz:
http://arxiv.org/abs/2103.13241