A5005981324- Dark Matter and Cosmic Phenomena
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Astronomy and Astrophysical Research
- Space Satellite Systems and Control
- Adaptive optics and wavefront sensing
- Atomic and Subatomic Physics Research
- Optical Systems and Laser Technology
- Climate Change and Health Impacts
- Solar and Space Plasma Dynamics
- RNA Research and Splicing
- Space exploration and regulation
- Advanced Thermodynamics and Statistical Mechanics
- Monoclonal and Polyclonal Antibodies Research
- Health, Environment, Cognitive Aging
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Infrared Target Detection Methodologies
- CCD and CMOS Imaging Sensors
- Molecular Biology Techniques and Applications
- Data-Driven Disease Surveillance
- Astro and Planetary Science
- Superconducting and THz Device Technology
University of California, Davis
2020-2024
Abstract We report studies on the mitigation of optical effects bright low-Earth-orbit (LEO) satellites Vera C. Rubin Observatory and its Legacy Survey Space Time (LSST). These include options for pointing telescope to avoid satellites, laboratory investigations trails LSST camera sensors, algorithms correcting image artifacts caused by trails, experiments darkening SpaceX Starlink ground-based follow-up observations. The original v0.9 are g ∼ 4.5 mag, initial experiment “DarkSat” is 6.1...
Astrophysical and cosmological observations currently provide the only robust, empirical measurements of dark matter. Future with Large Synoptic Survey Telescope (LSST) will necessary guidance for experimental matter program. This white paper represents a community effort to summarize science case studying fundamental physics LSST. We discuss how LSST inform our understanding properties matter, such as particle mass, self-interaction strength, non-gravitational couplings Standard Model,...
LSST Camera CCDs produced by the manufacturer e2v exhibit strong and novel residual charge images when exposed to bright sources. These manifest in following exposures both same pixel areas as source, pixels trailing between source serial register. Both of these pose systematic challenges Rubin Observatory Legacy Survey Space Time instrument signature removal. The latter trail region is especially impactful it affects a much larger area less well defined position. In our study this effect at...
We are building an experiment to search for dark matter in the form of photons nano- milli-eV mass range. This is electromagnetic dual magnetic detector radio experiments. It also a frequency-time two ways: high-Q signal wide-band data rather than tuning high-$Q$ resonator, and we measure electric fields. In this paper describe pilot using room temperature electronics which demonstrates feasibility sets useful limits kinetic coupling $\epsilon \sim 10^{-12}$ over 50--300 MHz. With factor...
We examine the simple model put forth in a recent note by Loeb 2024 regarding brightness of space debris size range 1-10 cm and their impact on Rubin Observatory LSST transient object searches. Their main conclusion was that "image contamination untracked might pose bigger challenge [than large commercial satellite constellations LEO]". Following corrections improvements to this model, we calculate apparent tumbling Low Earth Orbit (LEO) various sizes, briefly discuss likely potential...
Abstract We examine the simple model put forth in a recent note by Loeb regarding brightness of space debris size range 1–10 cm and their impact on Rubin Observatory Legacy Survey Space Time (LSST) transient object searches. Their main conclusion was that “image contamination untracked might pose bigger challenge [than large commercial satellite constellations Low-Earth orbit].” Following corrections improvements to this model, we calculate apparent tumbling low-Earth orbit (LEO) various...
We report new limits on the kinetic mixing strength of dark photon spanning mass range 0.21 -- 1.24 $\mu$eV corresponding to a frequency span 50 300 MHz. The Dark E-Field Radio experiment is wide-band search for matter. In this paper we detail changes in calibration and upgrades since our proof-of-concept pilot run. Our detector employs wide bandwidth E-field antenna moved multiple positions shielded room, low noise amplifier, wideband ADC, followed by $2^{24}$-point FFT. An optimal filter...
We report new limits on the kinetic mixing strength of dark photon spanning mass range <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>0.21</a:mn><a:mo>−</a:mo><a:mn>1.24</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">μ</a:mi><a:mi>eV</a:mi></a:mrow></a:math> corresponding to a frequency span 50–300 MHz. The Dark E-field Radio experiment is wideband search for matter. In this paper we detail changes in calibration and upgrades...