A5065036877- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Quantum Information and Cryptography
- Atomic and Subatomic Physics Research
- Plant Water Relations and Carbon Dynamics
- Plasmonic and Surface Plasmon Research
- Particle accelerators and beam dynamics
- Quantum optics and atomic interactions
- Educational Games and Gamification
- Cold Atom Physics and Bose-Einstein Condensates
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Strong Light-Matter Interactions
- Astrophysics and Cosmic Phenomena
- Statistics Education and Methodologies
- Stellar, planetary, and galactic studies
- Particle physics theoretical and experimental studies
Fermi National Accelerator Laboratory
2020-2025
University of California, Berkeley
2014-2020
Dark matter particles with a mass around 1 eV can decay into near-infrared photons. Utilizing available public blank sky observations from the NIRSpec IFU on James Webb Space Telescope (JWST), we search for narrow emission line due to decaying dark and derive leading constraints in range 0.8-3 rate photons, more specifically, axion-photon coupling case of axionlike particles. We exclude τ<3.5×10^{26} s at m_{DM}≃0.8 and, axions, g_{aγγ}>1.3×10^{-11} GeV^{-1} m_{a}≃2.2 eV. Our results do not...
Massive early-type galaxies represent the modern-day remnants of earliest major star formation episodes in history universe. These are central to our understanding evolution cosmic structure, stellar populations, and supermassive black holes, but details their complex histories remain uncertain. To address this situation, we have initiated MASSIVE Survey, a volume-limited, multi-wavelength, integral-field spectroscopic (IFS) photometric survey structure dynamics ~100 most massive within...
We examine stellar population gradients in ∼100 massive early-type galaxies spanning km s−1 and MK of −22.5 to −26.5 mag, observed as part the MASSIVE survey. Using integral-field spectroscopy from Mitchell Spectrograph on 2.7 m telescope at McDonald Observatory, we create stacked spectra a function radius for binned by their velocity dispersion, mass, group richness. With excellent sampling highest radial trends properties extending beyond twice effective (). Specifically, age, metallicity,...
We present spatially resolved two-dimensional stellar kinematics for the 41 most massive early-type galaxies (ETGs; MK ≲ −25.7 mag, mass M* ≳ 1011.8 M⊙) of volume-limited (D < 108 Mpc) MASSIVE survey. For each galaxy, we obtain high-quality spectra in wavelength range 3650–5850 Å from 246-fibre Mitchell integral-field spectrograph at McDonald Observatory, covering a 107 arcsec × field view (often reaching 2 to 3 effective radii). measure 2D spatial distribution galaxy's angular momentum (λ...
Dark matter that is capable of sufficiently heating a local region in white dwarf will trigger runaway fusion and ignite type Ia supernova. This was originally proposed by Graham et al. used to constrain primordial black holes which transit heat via dynamical friction. In this paper, we consider dark (DM) candidates through the production high-energy standard model (SM) particles, show such particles efficiently thermalize medium supernovae. Based on existence long-lived dwarfs observed...
Dark matter (DM) which sufficiently heats a local region in white dwarf will trigger runaway fusion, igniting type Ia supernova (SN). In companion paper [P. W. Graham et al., Phys. Rev. D 98, 115027 (2018)], this instability was used to constrain DM heavier than $1{0}^{16}\text{ }\text{ }\mathrm{GeV}$ ignites SN through the violent interaction of one or two individual particles with stellar medium. Here we study ignition supernovae by formation and self-gravitational collapse core containing...
This is a Snowmass white paper on the utility of existing and future superconducting cavities to probe fundamental physics. Superconducting radio frequency (SRF) cavity technology has seen tremendous progress in past decades, as tool for accelerator science. With advances spear-headed by SQMS center at Fermilab, they are now being brought quantum regime becoming science thanks high degree coherence. The same quality factor can be leveraged search new physics, including searches particles,...
We propose a novel design of laboratory search for axions based on photon regeneration with superconducting rf cavities. Our particular setup uses toroid as region confined static magnetic field, while production and detection cavities are positioned in regions vanishing external field. This permits cavity operation at quality factors $Q\ensuremath{\sim}{10}^{10}--{10}^{12}$. The limitations due to fundamental issues such signal screening backreaction discussed, the optimal sensitivity is...
The detection of ultralight dark matter through interactions with nucleons, electrons, and photons has been explored in depth. In this work we propose to use precision muon experiments, specifically g-2 electric dipole moment measurements, detect that couples predominantly muons. We set direct, terrestrial limits on DM-muon using existing data, show a time-resolved reanalysis ongoing upcoming precession experiments will be sensitive signals. Intriguingly, also find the current anomaly can...
Dark matter particles with a mass around 1 eV can decay into near-infrared photons. Utilising available public blank sky observations from the NIRSpec IFU on James Webb Space Telescope (JWST), we search for narrow emission line due to decaying dark and derive leading constraints in range 0.8-3 rate photons, more specifically, axion-photon coupling case of axion-like particles. We exclude $\tau < 6.7\cdot 10^{26}$ s at $m_{\rm DM} \simeq 0.9$ and, axions, $g_{a \gamma \gamma} > 9.4 \cdot...
We examine stellar population gradients in ~100 massive early type galaxies spanning 180 < sigma* 370 km/s and M_K of -22.5 to -26.5 mag, observed as part the MASSIVE survey (Ma et al. 2014). Using integral-field spectroscopy from Mitchell Spectrograph on 2.7m telescope at McDonald Observatory, we create stacked spectra a function radius for binned by their velocity dispersion, mass, group richness. With excellent sampling highest radial trends properties extending beyond twice effective...
A kinetically-mixed hidden photon is sourced as an evanescent mode by electromagnetic fields that oscillate at a frequency smaller than the mass. These modes fall off exponentially with distance, but nevertheless yield detectable signals in regeneration experiment if barrier made sufficiently thin. We consider such using superconducting cavities GHz frequencies, proposing various cavity and arrangements enable unique sensitivity to masses ranging from $10^{-5}$ eV $ 10^{-1}$ eV.