A5083254328- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Embedded Systems Design Techniques
- Optical Systems and Laser Technology
- Geomagnetism and Paleomagnetism Studies
- Adaptive optics and wavefront sensing
- Scientific Research and Discoveries
- Solar and Space Plasma Dynamics
- Astronomical Observations and Instrumentation
- Advanced Optical Sensing Technologies
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Astrophysics and Star Formation Studies
- Target Tracking and Data Fusion in Sensor Networks
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
University of Surrey
2023-2024
SKA Observatory
2021
University of Hawaii at Hilo
2002-2007
Context.The infrared wide-field camera (WFCAM) is now in operation on the 3.8 m UK Infrared Telescope Mauna Kea. WFCAM currently has fastest survey speed of any world, and combined with generous allocations telescope time, will produce deep maps sky from Z to K band. The data a set public surveys, known as UKIDSS, be initially available astronomers ESO member states, later world.
Astrometry from {\it Gaia} DR3 has enabled the discovery of a sample 3000+ binaries containing white dwarfs (WD) and main-sequence (MS) stars in relatively wide orbits, with orbital periods $P_{\rm orb} = (100-1000)$ d. This population was not predicted by binary synthesis models before -- if orbits are robust likely requires very efficient envelope ejection during common evolution (CEE). To assess reliability solutions, we measured multi-epoch radial velocities (RVs) 31 WD+MS candidates...
Abstract Astrometry from Gaia DR3 has enabled the discovery of a sample 3000+ binaries containing white dwarfs (WD) and main-sequence (MS) stars in relatively wide orbits, with orbital periods P orb = (100–1000) days. This population was not predicted by binary synthesis models before and—if orbits are robust—likely requires very efficient envelope ejection during common evolution (CEE). To assess reliability solutions, we measured multi-epoch radial velocities (RVs) 31 WD+MS candidates...
ABSTRACT The Thermally Pulsing- (Super) Asymptotic Giant Branch is a late stage in the evolution of low- and intermediate-mass stars. These stars undergo strong wind mass-loss diverse nucleosynthesis. Third dredge-up events, that occur following thermal pulses, are responsible for enriching surfaces stars, hence an understanding this process crucial constraining galactic chemical evolution. Using custom numerical scheme, we investigate temporal spatial resolution required to resolve third 1D...
ABSTRACT We address the challenge of running thermally pulsing-(super)asymptotic giant branch [TP-(S)AGB] models, with a 1D hydrostatic stellar evolution code, without suffering instabilities that terminate evolution. investigate two usually occur during luminosity peak following thermal pulse: hydrogen recombination instability and Fe-peak instability. Both when mass is significantly reduced ($M \lesssim M_\mathrm{i}/2$) at end TP-(S)AGB in our models initial $M_\mathrm{i}\gtrsim...
The tracking performance of the United Kingdom InfraRed Telescope (UKIRT) is directly related to accuracy position measurement which given by an encoder. It found that encoder has some deterministic and random errors cause consistent "wobbling" telescope. Therefore, a Kalman filter with error input model adopted in this embedded real-time control system reduce both effects. Our extensive test shows improved. Astronomers' report confirms our result.
The Square Kilometre Array telescopes have recently started their construction phase, after years of pre-construction effort. new SKA Observatory (SKAO) intergovernmental organisation has been created, and the start ($\mathrm{T_0}$) already happened. In this talk, we summarise progress our facility, role that agile software development open-source collaboration, in particular TANGO-based control system, is playing.