67 citations · 207 across the 9 of their papers we have counts for
9 papers
A Scatter of Light from a Polarized World
Sloane J. Wiktorowicz, Pushkar Kopparla, Jiazheng Li +1
Many known exoplanets harbor clouds, which lead to degeneracies in spectroscopic models between particle composition and size. Polarimetry, however, provides independent assessment…
General Circulation Model Errors are Variable across Exoclimate Parameter Spaces
Pushkar Kopparla, Russell Deitrick, Kevin Heng +2
General circulation models are often used to explore exoclimate parameter spaces and classify atmospheric circulation regimes. Models are tuned to give reasonable climate states fo…
A Recharge Oscillator Model for Interannual Variability in Venus' Clouds
Pushkar Kopparla, Ashwin Seshadri, Takeshi Imamura +1
Sulfur dioxide is a radiatively and chemically important trace gas in the atmosphere of Venus and its abundance at the cloud-tops has been observed to vary on interannual to decada…
Principal Components of Short-term Variability in Venus' UV Albedo
Pushkar Kopparla, Yeon Joo Lee, Takeshi Imamura +1
We explore the dominant modes of variability in the observed albedo at the cloud tops of Venus using the Akatsuki UVI 283-nm and 365-nm observations, which are sensitive to SO2 and…
A Multiple Scattering Polarized Radiative Transfer Model: Application to HD 189733b
Pushkar Kopparla, Vijay Natraj, Xi Zhang +3
We present a multiple scattering vector radiative transfer model which produces disk integrated, full phase polarized light curves for reflected light from an exoplanetary atmosphe…
Reflected Light Curves, Spherical and Bond Albedos of Jupiter- and Saturn-like Exoplanets
Ulyana Dyudina, Xi Zhang, Liming Li +5
Reflected light curves observed for exoplanets indicate bright clouds at some of them. We estimate how the light curve and total stellar heating of a planet depend on forward and b…
A Ground-Based Albedo Upper Limit for HD 189733b from Polarimetry
Sloane J. Wiktorowicz, Larissa A. Nofi, Daniel Jontof-Hutter +5
We present 50 nights of polarimetric observations of HD 189733 in band using the POLISH2 aperture-integrated polarimeter at the Lick Observatory Shane 3-m telescope. This instr…
Aggregate Particles in the Plumes of Enceladus
Peter Gao, Pushkar Kopparla, Xi Zhang +1
Estimates of the total particulate mass of the plumes of Enceladus are important to constrain theories of particle formation and transport at the surface and interior of the satell…
On the Stability of Super-Earth Atmospheres
Kevin Heng, Pushkar Kopparla
We investigate the stability of super Earth atmospheres around M stars using a 7-parameter, analytical framework. We construct stability diagrams in the parameter space of exoplane…