199 citations · 489 across the 13 of their papers we have counts for
10 papers · 1 filter
Resilience of Snowball Earth to Stochastic Events
Guillaume Chaverot, Andrea Zorzi, Xuesong Ding +6
Earth went through at least two periods of global glaciation (i.e., ``Snowball Earth'' states) during the Neoproterozoic, the shortest of which (the Marinoan) may not have lasted s…
Dynamics or Geysers and tracer transport over the south pole of Enceladus
Wanying Kang, John Marshall, Tushar Mittal +1
Over the south pole of Enceladus, an icy moon of Saturn, geysers eject water into space in a striped pattern, making Enceladus one of the most attractive destinations in the search…
Trends in Silicates in the Pictoris Disk
Cicero X. Lu, Christine H. Chen, B. A. Sargent +14
While beta Pic is known to host silicates in ring-like structures, whether the properties of these silicate dust vary with stellocentric distance remains an open question. We re-an…
How does salinity shape ocean circulation and ice geometry on Enceladus and other icy satellites?
Wanying Kang, Tushar Mittal, Suyash Bire +2
Of profound astrobiological interest, Enceladus appears to have a global subsurface ocean that is salty, indicating water-rock reaction at present or in the past, important for its…
An Exo-Kuiper Belt and An Extended Halo around HD 191089 in Scattered Light
Bin Ren, Élodie Choquet, Marshall D. Perrin +70
We have obtained Hubble Space Telescope STIS and NICMOS, and Gemini/GPI scattered light images of the HD 191089 debris disk. We identify two spatial components: a ring resembling K…
Infrared Spectroscopy of HR 4796A's Bright Outer Cometary Ring + Tenuous Inner Hot Dust Cloud
Carey M. Lisse, Mike L. Sitko, Massimo Marengo +4
We have obtained new NASA IRTF SpeX spectra of the HR 4796A debris ring system. We find a unique red excess flux that extends out to ~9 um in Spitzer IRS spectra, where thermal emi…
IRS Spectra of Debris Disks in the Scorpius-Centaurus OB Association
Hannah Jang-Condell, Christine H. Chen, Tushar Mittal +5
We analyze Spitzer IRS spectra of 110 B-, A-, F-, and G-type stars with optically thin infrared excess in the Scorpius-Centaurus (ScoCen) OB association. The age of these stars ran…
Discovery of Resolved Debris Disk Around HD 131835
Li-Wei Hung, Michael P. Fitzgerald, Christine H. Chen +3
We report the discovery of the resolved disk around HD 131835 and present the analysis and modeling of its thermal emission. HD 131835 is a ~15 Myr A2 star in the Scorpius-Centauru…
Fast Modes and Dusty Horseshoes in Transitional Disks
Tushar Mittal, Eugene Chiang
The brightest transitional protoplanetary disks are often azimuthally asymmetric: their mm-wave thermal emission peaks strongly on one side. Dust overdensities can exceed 100…
Polarimetry with the Gemini Planet Imager: Methods, Performance at First Light, and the Circumstellar Ring around HR 4796A
Marshall D. Perrin, Gaspard Duchene, Max Millar-Blanchaer +41
We present the first results from the polarimetry mode of the Gemini Planet Imager (GPI), which uses a new integral field polarimetry architecture to provide high contrast linear p…