Aniket Sanghi (Caltech) presents results from their JWST survey for giant planets around A component of Alpha Centauri system, discussing the single detection and two non-detections of the exoplanet candidate (and constraints on its nature when combining data with the VLT/NEAR candidate) #ExSoCal
Jerry Xuan (UCLA) presenting measurements of the elements C,N, O, S in the spectra of the four giant planets orbiting HR 8799, trying to constrain the compositional variations its the disk that spawned the system #ExSoCal
Nick Choksi (Caltech) presents in the physics of accretion and spectral energy distributions of recently discovered accretion giant protoplanets with circumplanetary disks #ExSoCal
Vidya Venkatesan (UCI) presented results on measurements of the orbital inclinations of the young star GQ Lupi, its disk, and its two low-mass companions, showing they are with fairly closely aligned #ExSoCal
Jean-Baptiste Ruffio presented results exploring the detectability of biosignatures as function of spectral resolution for Habitable Worlds Observatory #ExSoCal
Isaac Malsky (Caltech) on using ML emulation to speed up redaitive transfer calculations for exoplanet atmospheres and spectra #ExSoCal
Sloane Wiktorowicz shows measurements of significant polarization In the light of hot Jupiter HD 189733, including circular polarization… signs of planet-star interaction? #ExSoCal
Pable Drake Hernandez (Caltech)presents modeling of JWST infrared spectra of the hot Jupiter WASP-121 showing evidence of TiO depletion in its atmosphere #ExSoCal
Aurora Kesseli presents spectrocopic evidence for western hotspot offset for ‘hot Jupiter’ CoRoT-2b, the only strong case of winds going opposite direction of expected if it was tidally locked. But planet has slightly non-zero ecc and star is young (~200 Myr), so could be still sychronizing #ExSoCal
Iam Brunton (Caltech) shows results on exoplanets migrating into resonances, trying to infer properties of inner protoplanetary disks from the distribution of exoplanets in mean-motion resonances
#ExSoCal
Jingwen Zhang (UCSB) shows results on the distributions of the differences in inclinations between transiting exoplanets vs stellar companions. Distribution seems to be bimodal, with closer binaries having smaller differences in inclinations between transiting exoplanets and conpanion stars #ExSoCal
Greg Gilbert (Caltech) presents on statistical trends on the continuum of companions for nearby Sun-like stars spanning ‘planets’, ‘brown dwarfs’ to ‘low-mass stars’, showing smooth trends in mass vs ecc, but some clustering in metallicity versus mass. 2 or 3(?) formation mechanisms? #ExSoCal
Judah van Zandt (UCSB) shows statistical results on frequency and mass distribution of conpanions to nearby Sun-like stars in the California Legacy Radial Velocity survey, when combined with orbital constraints from precise ESA Hipparcos+Gaia astrometry. Brown dwarf desert still exists! #ExSoCal
Ankan Sur (UCLA) shows improved interiors models with ‘fuzzy cores’ (comp. gradients), He rain, that do great job fitting precisely measured physical parameters of Jupiter and Saturn measured by NASA Juno, Cassini, Galileo. New models will update inferred masses of imaged giant exoplanets
#ExSoCal
Susan Terebey starts us off on #ExSoCal day 2 with results on the earliest stages of the evolution of stars and their exoplanets - protostars, protoplanetary disks, envelopes — modeling the shocks of the in-falling envelopes onto the disks (Shock Twist Angle Keplerian disks)
#ALMA #Spitzer
#Exoplanet folks, check out Eric's posts to follow along with all the great talks at #ExSoCal! 🔭
Rebecca Zhang (UCSB) presented results on observations with the near-infrared polarimeter on Keck/NIRC2, which can characterize dust grains in a variety of types of targets (e.g., circumstellar disks) #ExSoCal
Andrea Lin presenting on issue predicted to affect accuracy of precise radial velocities on single-mode fiber-fed spectrographs on large telescopes - differential limb coupling. Nearby target stars are typically ~1 milliarcsec, but diffrctn limits in large telescopes ~tens of milliarcsec #ExSoCal
Ben Sappey (UCSD) presented on the calibration system for the new HISPEC high resolution near-IR spectrograph capable of nulling that will be used on Keck. #ExSoCal
Jason Williams (Carnegie) presents on the new Henrietta infrared spectrograph for exoplanet spectroscopy
#ExSoCal
Emma Miles (UCR) presents on efforts to model atmosphere and Venus and ‘super-Venus’ exoplanets discovered in big surveys like the NASA Kepler and TESS missions, and providing context for future Venus missions and exoplanet surveys
#ExSoCal
Danica Adams (UCLA) presents results on modeling whether SO2 could have acted to increase the reflectivity of early Venus, providing cooling. However the models that provided plenty of cooling due to sulfuric acid hazes required very high atmospheric water abundances (~10%) #ExSoCal
Evan Sneed (UCR) presents results of modeling atmospheres and photochemistry of TRAPPIST-1 hab zone exoplanets, predicting strengths of abiotic oxygen featutes
#ExSoCal
Pierre-Alexis Roy (UCLA) presents JWST spwctroscopy results on sub-Neptune exoplanets showing hints of trends by temperature and possibly interior composition, aerosols, etc.
#ExSoCal
Luke Bouma (Carnegie) improves the age estimates of stars observed by the NASA Kepler mission, finding close-in exoplanets are much rarer around young (<1Gyr) stars compared to older ~few Gyr stars. Why? Observed fewer young stars due to kimenatic heating and declining star-formation rate
#ExSoCal
Kevin-Hardegree Ullman (IPAC) duscusses results from improving characterization of Kepler/K2-discovered transiting exoplanets, showing interesting trends in the demographics of rocky and sub-Neptune planets, as functions of stellar mass and age. #ExSoCal
Josh Simon (Carnegie) presents TESS discovery and followup spectroscopy of a remarkably metal-poor (([Fe/H) ~ -0.7) hot Jupiter exoplanet
#ExSoCal
Facundo Perez Paolino (Caltech) presents his recent results on a large survey to measure magnetic strengths for hundreds of low-mass pre-main sequence stars, trying improve fidelity of predictions for stellar X-ray, mag fields, stellar winds for young stars, exoplanet stars, (& early Sun)
#ExSoCal
Tara Fetherolf (UCR) explores the variabilty of exoplanet host stars with NASA TESS mission light curves assembled in her TESS Stellar Variability Catalog
archive.stsci.edu/hlsp/tess-svc
#ExSoCal
