A5054155565- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Planetary Science and Exploration
- Distributed and Parallel Computing Systems
- Scientific Research and Discoveries
- Geomagnetism and Paleomagnetism Studies
- Astronomy and Astrophysical Research
- Isotope Analysis in Ecology
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Advanced Image and Video Retrieval Techniques
- Space Exploration and Technology
- Spacecraft Design and Technology
- Galaxies: Formation, Evolution, Phenomena
- Catalysts for Methane Reforming
- Distributed systems and fault tolerance
- Reservoir Engineering and Simulation Methods
- Data Management and Algorithms
- Electrocatalysts for Energy Conversion
- Methane Hydrates and Related Phenomena
- Remote Sensing and LiDAR Applications
- Robotic Path Planning Algorithms
- CCD and CMOS Imaging Sensors
- Medical Image Segmentation Techniques
University of Washington
2019-2024
City University of Seattle
2021-2024
Seattle University
2023
Planetary Science Institute
2020
Max Planck Institute for Astronomy
2019
Max Planck Society
2019
University of Idaho
2015
Abstract The DECam Ecliptic Exploration Project (DEEP) is a deep survey of the trans-Neptunian solar system being carried out on 4 m Blanco telescope at Cerro Tololo Inter-American Observatory in Chile using Dark Energy Camera (DECam). By shift-and-stack technique to achieve mean limiting magnitude r ∼ 26.2, DEEP achieves an unprecedented combination area and depth, enabling quantitative leaps forward our understanding Kuiper Belt populations. This work reports results from analysis 20, 3...
We describe a software package called VPLanet that simulates fundamental aspects of planetary system evolution over Gyr timescales, with focus on investigating habitable worlds. In this initial release, eleven physics modules are included model internal, atmospheric, rotational, orbital, stellar, and galactic processes. Many these can be coupled simultaneously to simulate the terrestrial planets, gaseous stars. The code is validated by reproducing selection observations past results. written...
Abstract We present here the DECam Ecliptic Exploration Project (DEEP), a 3 yr NOAO/NOIRLab Survey that was allocated 46.5 nights to discover and measure properties of thousands trans-Neptunian objects (TNOs) magnitudes as faint VR ∼ 27 mag, corresponding sizes small 20 km diameter. In this paper we science goals project, experimental design our survey, technical demonstration approach. The core project is “digital tracking,” in which all collected images are combined at range motion vectors...
Abstract We report the detection of 239 trans-Neptunian objects discovered through ongoing New Horizons survey for distant minor bodies being performed with Hyper Suprime-Cam mosaic imager on Subaru Telescope. These were in images acquired either r 2 or recently commissioned EB- gri filter using shift and stack routines. Due to extremely high stellar density search region downstream spacecraft, new machine learning techniques had be developed manage false-positive rate bogus candidates...
Abstract We present the methods and results from discovery photometric measurement of 26 bright VR > 24 trans-Neptunian objects (TNOs) during first year (2019–20) DECam Ecliptic Exploration Project (DEEP). The DEEP survey is an observational TNO with wide sky coverage, high sensitivity, a fast cadence. apply computer vision technique known as progressive probabilistic Hough transform to identify linearly moving transient sources within catalogs. After subsequent visual vetting, we provide...
Abstract We present the DECam Ecliptic Exploration Project (DEEP) survey strategy, including observing cadence for orbit determination, exposure times, field pointings and filter choices. The overall goal of is to discover characterize orbits a few thousand Trans-Neptunian objects (TNOs) using Dark Energy Camera (DECam) on Cerro Tololo Inter-American Observatory Blanco 4 m telescope. experiment designed collect very deep series exposures totaling hours sky each several 2.7 square degree...
Abstract We present the first set of trans-Neptunian objects (TNOs) observed on multiple nights in data taken from DECam Ecliptic Exploration Project. Of these 110 TNOs, 105 do not coincide with previously known TNOs and appear to be new discoveries. Each individual detection for our resulted a digital tracking search at TNO rates motion, using two-to-four-hour exposure sets, detections were subsequently linked across observing seasons. This procedure allows us find magnitudes m VR ≈ 26. The...
Abstract We present a detailed study of the observational biases DECam Ecliptic Exploration Project’s B1 data release and survey simulation software that enables direct statistical comparisons between models our data. inject synthetic population objects into images, then subsequently recover them in same processing as real detections. This us to characterize survey’s completeness function apparent magnitudes on-sky rates motion. statistically optimal functional form for magnitude, develop...
Superfast rotators (SFRs) are small solar system objects that rotate faster than generally possible for a cohesionless rubble pile. Their rotational characteristics allow us to make inferences about their interior structure and composition. Here, we present the methods results from preliminary search SFRs in DECam Ecliptic Exploration Project (DEEP) data set. We find three sample of 686 main-belt asteroids, implying an occurrence rate 0.4 -0.3/+0.1 percent - higher incidence has been...
This paper presents a new optical imaging survey of four deep drilling fields (DDFs), two Galactic and extragalactic, with the Dark Energy Camera (DECam) on 4 meter Blanco telescope at Cerro Tololo Inter-American Observatory (CTIO). During first year observations in 2021, $>$4000 images covering 21 square degrees (7 DECam pointings), $\sim$40 epochs (nights) per field 5 to 6 night filter $g$, $r$, $i$, and/or $z$, have become publicly available (the proprietary period for this program is...
Abstract With Hubble Space Telescope Fine Guidance Sensor astrometry and published previously unpublished radial velocity measures, we explore the exoplanetary system μ Arae. Our modeling of velocities results in improved orbital elements for four known components. contains no evidence any companion but provides upper limits three masses. A final summary all past exoplanet uncovers a bias toward small inclinations (more face-on than edge-on). This remains unexplained by number statistics,...
We present "Tracklet-less Heliocentric Orbit Recovery" (THOR), an algorithm for linking of observations Solar System objects across multiple epochs that does not require intra-night tracklets or a predefined cadence within search window. By sparsely covering regions interest in the phase space with "test orbits", transforming nearby over few nights into co-rotating frame test orbit at each epoch, and then performing generalized Hough transform on transformed detections followed by...
Trans-Neptunian Objects (TNOs) provide a window into the history of Solar System, but they can be challenging to observe due their distance from Sun and relatively low brightness. Here we report detection 75 moving objects that could not link any other known objects, faintest which has VR magnitude $25.02 \pm 0.93$ using KBMOD platform. We recover an additional 24 sources with previously-known orbits. place constraints on barycentric distance, inclination, longitude ascending node these...
We introduce a new computational technique for searching faint moving sources in astronomical images. Starting from maximum likelihood estimate the probability of detection source within series images, we develop massively parallel algorithm through candidate asteroid trajectories that utilizes Graphics Processing Units (GPU). This can search over 10^10 possible stacks order 10-15 4K x images under minute using single consumer grade GPU. apply this to data 2015 campaign High Cadence...
We report the detection of 239 trans-Neptunian Objects discovered through on-going New Horizons survey for distant minor bodies being performed with Hyper Suprime-Cam mosaic imager on Subaru Telescope. These objects were in images acquired either r2 or recently commissioned EB-gri filter using shift and stack routines. Due to extremely high stellar density search region down stream spacecraft, new machine learning techniques had be developed manage false positive rate bogus candidates...
We present here the DECam Ecliptic Exploration Project (DEEP), a three year NOAO/NOIRLab Survey that was allocated 46.5 nights to discover and measure properties of thousands trans-Neptunian objects (TNOs) magnitudes as faint VR~27, corresponding sizes small 20 km diameter. In this paper we science goals project, experimental design our survey, technical demonstration approach. The core project is "digital tracking," in which all collected images are combined at range motion vectors detect...
We present the methods and results from discovery photometric measurement of 26 bright (VR $>$ 24 trans-Neptunian objects (TNOs) during first year (2019-20) DECam Ecliptic Exploration Project (DEEP). The DEEP survey is an observational TNO with wide sky coverage, high sensitivity, a fast cadence. apply computer vision technique known as progressive probabilistic Hough transform to identify linearly-moving transient sources within catalogs. After subsequent visual vetting, we provide...
The DECam Ecliptic Exploration Project (DEEP) is a deep survey of the trans-Neptunian solar system being carried out on 4-meter Blanco telescope at Cerro Tololo Inter-American Observatory in Chile using Dark Energy Camera (DECam). By shift-and-stack technique to achieve mean limiting magnitude $r \sim 26.2$, DEEP achieves an unprecedented combination area and depth, enabling quantitative leaps forward our understanding Kuiper Belt populations. This work reports results from analysis twenty 3...
We present a detailed study of the observational biases DECam Ecliptic Exploration Project's (DEEP) B1 data release and survey simulation software that enables direct statistical comparisons between models our data. inject synthetic population objects into images, then subsequently recover them in same processing as real detections. This us to characterize survey's completeness function apparent magnitudes on-sky rates motion. statistically optimal functional form for magnitude, develop...
We present the DECam Ecliptic Exploration Project (DEEP) survey strategy including observing cadence for orbit determination, exposure times, field pointings and filter choices. The overall goal of is to discover characterize orbits a few thousand Trans-Neptunian Objects (TNOs) using Dark Energy Camera (DECam) on Cerro Tololo Inter-American Observatory (CTIO) Blanco 4 meter telescope. experiment designed collect very deep series exposures totaling hours sky each several 2.7 square degree...
We present the first set of trans-Neptunian objects (TNOs) observed on multiple nights in data taken from DECam Ecliptic Exploration Project (DEEP). Of these 110 TNOs, 105 do not coincide with previously known TNOs and appear to be new discoveries. Each individual detection for our resulted a digital tracking search at TNO rates motion, using two four hour exposure sets, detections were subsequently linked across observing seasons. This procedure allows us find magnitudes $m_{VR} \approx...