A5042963931- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Space Satellite Systems and Control
- Planetary Science and Exploration
- Memory and Neural Mechanisms
- Scheduling and Timetabling Solutions
- Visual perception and processing mechanisms
- Neural dynamics and brain function
- Nuclear Physics and Applications
- Astronomical Observations and Instrumentation
- Space Exploration and Technology
University of California, Los Angeles
2022-2024
California Institute of Technology
2024
Astronomy and Space
2022
Abstract The distribution of stellar obliquities provides critical insight into the formation and evolution pathways exoplanets. In past decade, it was found that hot stars hosting Jupiters are more likely to have high than cool stars, but is not clear whether this trend exists only for or holds other types planets. work, we extend study (6250–7000 K) with transiting super-Earth-sized sub-Neptune-sized We constrain obliquity based on measurements stars’ projected rotation velocities. Our...
Abstract We present spectral observations of the multiplanet host TOI-1694 during transit TOI-1694b, a 26.1 M ⊕ hot Neptune with 3.77 day orbit. By analyzing radial velocities obtained from Keck Planet Finder, we modeled Rossiter–McLaughlin effect and constrained sky-projected obliquity to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>9</mml:mn> <mml:mo>°</mml:mo> </mml:mrow> <mml:mo>−</mml:mo> <mml:mn>1</mml:mn> <mml:msup>...
Abstract Precise Doppler studies of extrasolar planets require fine-grained control observational cadence, i.e., the timing and spacing between observations. We present a novel framework for scheduling set campaigns with different cadence requirements at W. M. Keck Observatory. For observing programs allocated nights on an instrument, our software optimizes ordering ∼1000 observations within given semester. achieve near-optimal solution in real-time using hierarchical Integer Linear...
Hundreds of exoplanets between 1-1.8 times the size Earth have been discovered on close in orbits. However, these planets show such a diversity densities that some appear to be made entirely iron, while others host gaseous envelopes. To test this composition, we update masses 5 rocky (HD 93963 A b, Kepler-10 Kepler-100 Kepler-407 and TOI-1444 b) present confirmation new planet (TOI-1011) using 187 high precision RVs from Gemini/MAROON-X Keck/KPF. Our updated suggest compositions closer than...
Abstract We present a revised mass measurement for HD 119130 b (aka K2-292 b), transiting planet ( P = 17 days, R p <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>2.63</mml:mn> </mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.10</mml:mn> <mml:mo>+</mml:mo> <mml:mn>0.11</mml:mn> </mml:msubsup> </mml:math> ⊕ ) orbiting chromospherically inactive G dwarf, previously thought to be one of the densest sub-Neptunes known. Our follow-up Doppler...
Abstract The size and complexity of modern astronomical surveys has grown to the point where, in many cases, traditional human scheduling observations are tedious at best impractical worst. Automated algorithms present an opportunity save effort increase scientific productivity. A common challenge involves determining optimal ordering a set targets over night subject timing constraints time-dependent slew overheads. We solution “traveling telescope problem” that uses mixed-integer linear...
The distribution of stellar obliquities provides critical insight into the formation and evolution pathways exoplanets. In past decade, it was found that hot stars hosting Jupiters are more likely to have high than cool stars, but is not clear whether this trend exists only for or holds other types planets. work, we extend study (6250-7000\,K) with transiting super-Earth sub-Neptune-sized We constrain obliquity based on measurements stars' projected rotation velocities. Our sample consists...
We present a revised mass measurement for HD 119130 b (aka K2-292 b), transiting planet ($P = 17$ days, $R_\mathrm{p} 2.63^{+0.11}_{-0.10}$ $R_\mathrm{\oplus}$) orbiting chromospherically inactive G dwarf, previously thought to be one of the densest sub-Neptunes known. Our follow-up Doppler observations with HARPS, HARPS-N, and HIRES reveal that is, in fact, nearly one-third as massive originally suggested by its initial confirmation paper. analysis finds $M_\mathrm{p} 8.8 \pm 3.2$...
We present spectral observations of the multiplanet host TOI-1694 during transit TOI-1694b, a 26.1 $M_\oplus$ hot Neptune with 3.77-day orbit. By analyzing radial velocities obtained from Keck Planet Finder, we modeled Rossiter-McLaughlin effect and constrained sky-projected obliquity to ${9\degree}^{+22\degree}_{-18\degree}$, which is strong evidence for nearly aligned TOI-1694b one fewer than ten small planets accompanied by confirmed outer giant has been measured. consider significance...
Abstract Visual perception plays a critical role in navigating space and extracting useful semantic information crucial to survival. To identify distant landmarks, we constantly shift gaze vectors through saccades, while still maintaining the visual of stable allocentric space. How can sustain so effortlessly? solve this question, have developed new concept NHT (Neural Holography Tomography). This model states that retinotopy is invisible (not available consciousness) must be converted time...