A5083031545- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Methane Hydrates and Related Phenomena
- Ionosphere and magnetosphere dynamics
- Advanced Measurement and Metrology Techniques
- Magnetic confinement fusion research
- Optical Systems and Laser Technology
- Quantum, superfluid, helium dynamics
Center for Astrophysics Harvard & Smithsonian
2023-2024
Harvard University
2022-2024
University of Hawaii System
2019
Abstract Superpuffs are planets with exceptionally low densities ( ρ ≲ 0.1 g cm −3 ) and core masses M c 5 ⊕ ). Many lower-mass p 10 superpuffs expected to be unstable catastrophic mass loss via photoevaporation and/or boil-off, whereas the larger gravitational potentials of higher-mass ≳ should make them more stable these processes. We test this expectation by studying atmospheric in warm, superpuff TOI-1420b = 25.1 , R 11.9 0.08 T eq 960 K). observed one full transit partial planet using...
Abstract Hot Neptunes, gaseous planets smaller than Saturn (∼3–8 R ⊕ ) with orbital periods less 10 days, are rare. Models predict this is due to high-energy stellar irradiation stripping planetary atmospheres over time, often leaving behind only rocky cores. Using our TESS full-frame-image pipeline giants in conjunction Keck/HIRES radial velocity measurements, we present the discovery of TIC365102760 b, a 6.2 (0.55 J ), 19.2 M (0.060 planet transiting red giant star every 4.21285 days. The...
Abstract We present the discovery of TOI-1420b, an exceptionally low-density ( ρ = 0.08 ± 0.02 g cm −3 ) transiting planet in a P 6.96 days orbit around late G-dwarf star. Using transit observations from TESS, LCOGT, Observatoire Privé du Mont, Whitin, Wendelstein, OAUV, Ca l’Ou, and KeplerCam, along with radial velocity HARPS-N NEID, we find that has radius R p 11.9 0.3 ⊕ mass M 25.1 3.8 . TOI-1420b is largest known less than 50 , indicating it contains sizeable envelope hydrogen helium....
The search for planets orbiting other stars has recently expanded to include from galaxies outside the Milky Way. With TESS and Gaia surveys, photometric kinematic information can be combined identify transiting planet candidates of extragalactic origin. Here, 1,080 low-luminosity red giant branch observed by with kinematics suggesting a high likelihood origin were searched transits. Transit injection-recovery tests performed measure sensitivity data completeness transit search. Injected...
Super-puffs are planets with exceptionally low densities ($\rho \lesssim 0.1$~g~cm$^{-3}$) and core masses ($M_c 5 M_\oplus$). Many lower-mass ($M_p\lesssim10M_\oplus$) super-puffs expected to be unstable catastrophic mass loss via photoevaporation and/or boil-off, whereas the larger gravitational potentials of higher-mass ($M_p\gtrsim10M_\oplus$) should make them more stable these processes. We test this expectation by studying atmospheric in warm, super-puff TOI-1420b ($M = 25.1M_\oplus$,...
Hot Neptunes, gaseous planets smaller than Saturn ($\sim$ 3-8 R$_\oplus$) with orbital periods less 10 days, are rare. Models predict this is due to high-energy stellar irradiation stripping planetary atmospheres over time, often leaving behind only rocky cores. We present the discovery of a 6.2 R$_\oplus$(0.55 R$_\mathrm{J}$), 19.2 M$_\oplus$(0.060 M$_\mathrm{J}$) planet transiting red giant star every 4.21285 days. The old age and high equilibrium temperature yet remarkably low density...
We present the discovery of TOI-1420b, an exceptionally low-density ($ρ= 0.08\pm0.02$ g cm$^{-3}$) transiting planet in a $P = 6.96$ day orbit around late G dwarf star. Using transit observations from TESS, LCOGT, OPM, Whitin, Wendelstein, OAUV, Ca l'Ou, and KeplerCam along with radial velocity HARPS-N NEID, we find that has radius $R_p$ 11.9 $\pm$ 0.3 $R_\Earth$ mass $M_p$ 25.1 3.8 $M_\Earth$. TOI-1420b is largest-known less than $50M_\Earth$, indicating it contains sizeable envelope...