A5102717064- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- History and Developments in Astronomy
- SAS software applications and methods
- Planetary Science and Exploration
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Atmospheric Ozone and Climate
- Advanced Power Generation Technologies
- Spacecraft Design and Technology
- Adaptive optics and wavefront sensing
- High-pressure geophysics and materials
- Nuclear reactor physics and engineering
- Archaeology and Rock Art Studies
- Seismology and Earthquake Studies
- Calibration and Measurement Techniques
- Spacecraft and Cryogenic Technologies
- Metallurgical Processes and Thermodynamics
- High-Temperature Coating Behaviors
- Forest ecology and management
- Impact of Light on Environment and Health
- Space Exploration and Technology
Gemini North Observatory
2016-2024
NSF’s NOIRLab
2023-2024
Appalachian State University
2016
The recent discovery by Pan-STARRS1 of 1I/2017 U1 (`Oumuamua), on an unbound and hyperbolic orbit, offers a rare opportunity to explore the planetary formation processes other stars, effect interstellar environment planetesimal surface. 1I/`Oumuamua's close encounter with inner Solar System in 2017 October was unique chance make observations matching those used characterize small-body populations our own System. We present near-simultaneous g$^\prime$, r$^\prime$, J photometry colors...
Abstract We report on our detailed characterization of Earth’s second known temporary natural satellite, or minimoon, asteroid 2020 CD 3 . An artificial origin can be ruled out based its area-to-mass ratio and broadband photometry, which suggest that it is a silicate belonging to the S V complex in taxonomy. The discovery allows for first time comparison between minimoons theoretical models their expected physical dynamical properties. estimated diameter <?CDATA ${1.2}_{-0.2}^{+0.4}$?> m...
Abstract On 20 December 2020, after more than 2 years of quiescence at Kīlauea Volcano, Hawaiʻi, renewed volcanic activity in the summit crater caused boiling water lake over a period ∼90 min. The resulting water‐rich, electrified plume rose to 11–13 km above sea level, which is among highest plumes on record for Kīlauea. Although conventional models would infer high mass flux from explosive magma‐water interaction, was not associated with an infrasound signal indicative “explosive”...
Abstract We report the results of spectroscopic and photometric observations emission-line object AS 386. For first time we found that it exhibits B[e] phenomenon fits definition an FS CMa type object. The optical spectrum shows presence a B-type star with following properties: T eff = 11,000 ± 500 K, log L / ⊙ 3.7 0.3, mass 7 1 M , distance D 2.4 0.3 kpc from Sun. detected regular radial velocity variations both absorption emission lines orbital parameters: P orb =131.27 0.09 days,...
The major components of gas turbines and their materials requirements are outlined. properties, advantages, limitations which have been being used in then described the following groups: aluminium alloys, magnesium titanium its steels, finally nickel- cobalt-base alloys. applications last group alloys importance metallurgical stability turbine blades, discs, nozzle guide vanes, sheet metal discussed. Corrosion prevention considered, followed by sections on experimental including chromium...
We describe the implementation of a remotely operated telescope on Skynet Robotic Telescope Network, system developed and run by University North Carolina-Chapel Hill. Our telescope, Appalachian State at its Dark Sky Observatory, runs robotically this queue-scheduled system, automatically taking calibration images acquiring program images, responding to Internet commands image afterglow accessible Gamma-Ray Burst events. process implementing Skynet-run from our client-side view, offer advice...
Two novel approaches to extend the lifetimes of commercial FeCrAlRE alloys, such as Aluchrom YHf and Kanthal AF, for industrial usage have been developed by CEC funded SMILER Project. These surface treatments either increased available alloy Al reservoir alloying, aluminising, or cladding/plating preformed an α-Al2O3 protective scale gas annealing. An extensive series evaluation testing in laboratory air, extending 3000 h chemical failure whichever was shorter, has undertaken at temperatures...
Gemini Observatory on Maunakea has been collecting optical and infrared science data for almost 15 years. We have begun a program to analyze imaging from two of the original facility instruments, GMOS NIRI, in order measure sky brightness levels multiple broad-band filters. The present work includes mid-2016 back through late-2008. measured background as function several operational quantities (e.g. moon phase, hours twilight, season). find that airglow is significant contributor primarily...