A5018814273- Astro and Planetary Science
- Planetary Science and Exploration
- Atmospheric Ozone and Climate
- Stellar, planetary, and galactic studies
- Space Exploration and Technology
- Astrophysics and Star Formation Studies
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Gamma-ray bursts and supernovae
- Spacecraft and Cryogenic Technologies
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Geological and Geochemical Analysis
- Atmospheric aerosols and clouds
- Geology and Paleoclimatology Research
- Marine and environmental studies
- Spacecraft Design and Technology
American Museum of Natural History
2015-2024
Columbia University
2017-2024
New York University
2024
National Museum of American History
2015-2017
Central Park Conservancy
2017
University of California, Berkeley
2010-2013
University of California System
2013
Jupiter's moon Io hosts extensive volcanism driven by tidal heating. The isotopic composition of Io's inventory volatile elements, including sulfur and chlorine, reflects its outgassing mass loss history provides an avenue for exploring evolution. We used millimeter observations atmosphere to measure isotopes in gaseous SO2 SO, chlorine NaCl KCl. find $^{34}$S/$^{32}$S=0.0595$\pm$0.0038 ($\delta^{34}$S=+347$\pm$86 per mille), which is highly enriched compared average Solar System values...
Abstract The atmosphere of Jupiter has east–west zonal jets that alternate as a function latitude tracked by cloud motions at tropospheric levels. Above and below the cold tropopause ~100 mbar, equatorial is covered hazes levels where thermal infrared observations used to characterize dynamics stratosphere lose part their sensitivity. James Webb Space Telescope in July 2022 show these higher detail than ever before reveal presence an intense (140 m s −1 ) jet 100–200 mbar (70 faster winds...
Abstract Current knowledge of the Uranian system is limited to observations from flyby Voyager 2 and remote observations. However, Uranus remains a highly compelling scientific target due unique properties many aspects planet itself its system. Future exploration must focus on cross-disciplinary science that spans range research areas planet’s interior, atmosphere, magnetosphere rings satellites, as well interactions between them. Detailed study by an orbiter crucial not only for valuable...
Jupiter’s atmospheric water abundance is a highly important cosmochemical parameter that linked to processes of planetary formation, weather, and circulation. Remote sensing in situ measurement attempts still leave room for substantial improvements our knowledge abundance. With the motivation advance understanding atmosphere, we investigate observations models deep clouds. We discuss clouds isolated convective storms (including unique storm site North Equatorial Belt episodically erupted...
Abstract We present spatially resolved millimeter maps of Neptune between 95 and 242 GHz taken with the Atacama Large Millimeter/submillimeter Array (ALMA) in 2016–2017. The weighting functions peak 1 10 bar on Neptune, lying altitudes probed at visible/infrared centimeter wavelengths. Thus, these observations provide important constraints atmospheric structure dynamics Neptune. identify seven well-resolved latitudinal bands discrete brightness temperature variations, order 0.5–3 K all three...
Abstract We present 1 mm observations constructed from Atacama Large (sub)Millimeter Array (ALMA) data of SO 2 , SO, and KCl when Io went sunlight into eclipse (2018 March 20) vice versa September 11). There is clear evidence volcanic plumes on 20 2. The distort the line profiles, causing high-velocity (≳500 m s −1 ) wings red-/blueshifted shoulders in profiles. During ingress, flux density dropped exponentially, atmosphere re-formed a linear fashion reemerging sunlight, with “post-eclipse...
HD 19467 B is presently the only directly imaged T dwarf companion known to induce a measurable Doppler acceleration around solar type star. We present spectroscopy measurements of this important benchmark object taken with Project 1640 integral field unit at Palomar Observatory. Our high-contrast R~30 observations obtained simultaneously across $JH$ bands confirm cold nature as reported from discovery article and determine its spectral for first time. Fitting measured energy distribution...
Abstract An outburst of cloud activity on Neptune in 2015 led to speculation about whether the clouds were convective nature, a wave phenomenon, or bright companions an unseen dark vortex (similar Great Dark Spot studied detail by Voyager 2 ). The Hubble Space Telescope ( HST ) finally answered this question discovering new at 45 degrees south planetographic latitude, named SDS-2015 for “southern spot discovered 2015.” is only fifth ever seen Neptune. In paper, we report imaging using ’s...
Abstract We present Atacama Large Millimeter/submillimeter Array (ALMA) and Very (VLA) spatial maps of the Uranian atmosphere taken between 2015 2018 at wavelengths from 1.3 mm to 10 cm, probing pressures ∼1 ∼50 bar resolutions 0.″1 0.″8. Radiative transfer modeling was performed determine physical origin brightness variations across Uranus’s disk. The radio-dark equator midlatitudes planet (south ∼50°N) are well fit by a deep H 2 S mixing ratio <?CDATA ${8.7}_{-1.5}^{+3.1}\times...
Abstract We observed Io with the James Webb Space Telescope (JWST) while satellite was in eclipse, and detected thermal emission from several volcanoes. The data were taken as part of our JWST‐ERS program #1373 on 15 November 2022. Kanehekili Fluctus exceptionally bright, Loki Patera had most likely entered a new brightening phase. Spectra NIRSpec/IFU at resolving power R ≈ 2,700 between 1.65 5.3 µm. spectra matched by combination blackbody curves that showed highest temperature, ∼1,200 K,...
HD 177830 is an evolved K0IV star with two known exoplanets. In addition to the planetary companions it has a late-type stellar companion discovered adaptive optics imagery. We observed binary system PHARO near-IR camera and Project 1640 coronagraph. Using coronagraph integral field spectrograph we extracted spectrum of companion. This allowed us determine that spectral type M4 ± 1 V. used both instruments measure astrometry system. Combining these data published data, determined likely...
Abstract We present the first comprehensive study of NaCl and KCl gases in Io’s atmosphere order to investigate their characteristics infer properties volcanoes subsurface magma chambers. In this work, we compile all past spectral line observations Io's from Atacama Large Millimeter/submillimeter Array use atmospheric models constrain physical on several dates between 2012 2018. appear be largely spatially confined, for with high resolution, temperatures are (∼500–1000 K), implying a...
Abstract We present spatially resolved (0.″1–1.″0) radio maps of Neptune taken from the Very Large Array and Atacama Millimeter/submillimeter between 2015 2017. Combined, these observations probe just below main methane cloud deck at ∼1 bar down to NH 4 SH ∼50 bar. Prominent latitudinal variations in brightness temperature are seen across disk. Depending on wavelength, south polar region is 5–40 K brighter than mid-latitudes northern equatorial region. use radiative transfer modeling coupled...