activity
20142026
most citedHelium in the eroding atmosphere of an exoplanet

368 citations · 3k across the 38 of their papers we have counts for

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34 papers · 1 filter

astro-ph.EP2026

WINERED Detects a Strong Atmospheric Outflow on the Sub-Neptune GJ 3090b

Shreyas Vissapragada, Zifan Lin, Annabella Meech +12

Sub-Neptunes are the most common short-period ( d) planets known. A major goal for the field is to build a comprehensive understanding of their compositions and evolutionary…

astro-ph.EP2025

Stringent Upper Bounds on Atmospheric Mass Loss from Three Neptune-Sized Planets in the TOI-4010 System

Morgan Saidel, Shreyas Vissapragada, Michael Zhang +6

Photoevaporative models predict that the lower edge of the Neptune desert is sculpted by atmospheric mass loss. However, the stellar high energy fluxes that power hydrodynamic esca…

astro-ph.EP2025★ 7 cited

Strong NUV Refractory Absorption and Dissociated Water in the Hubble Transmission Spectrum of the Ultra Hot Jupiter KELT-20 b

Yayaati Chachan, Joshua Lothringer, Julie Inglis +8

Ultra hot Jupiters (UHJs) present a promising pathway for drawing a link between a planet's composition and formation history. They retain both refractory and volatiles species in…

astro-ph.EP2024★ 2 cited

A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity

Abigail A. Tumborang, Jessica J. Spake, Heather A. Knutson +7

We present a detailed reanalysis of the atmospheric properties of WASP-19b, an ultra-hot Jupiter (1.14 M Jup, 1.41 R Jup) orbiting an active Sun-like star every 0.79 day. We reanal…

astro-ph.EP2024★ 5 cited

Atmospheric Mass Loss from TOI-1259 A b, a Gas Giant Planet With a White Dwarf Companion

Morgan Saidel, Shreyas Vissapragada, Jessica Spake +6

The lack of close-in Neptune-mass exoplanets evident in transit surveys has largely been attributed either to photoevaporative mass loss or high-eccentricity migration. To distingu…

astro-ph.EP2023★ 28 cited

Using helium 10830 Å transits to constrain planetary magnetic fields

Ethan Schreyer, James E. Owen, Jessica J. Spake +2

Planetary magnetic fields can affect the predicted mass loss rate for close-in planets that experience large amounts of UV irradiation. In this work, we present a method to detect…