HAT-P-67 b Archives

Metastable helium number density derived from the planetary wind, contrasting hot and cold planetary winds alongside isotropic and day side dominant outflow configurations. The star is positioned at the center, with the planet located in the −x direction, orbiting the star counterclokwise. The black circles indicate their extent, while the red circle represents the Hill radius RH = 2.6 Rp of the planet. Black, gray, and white contours illustrate the cumulative optical depth of τ = 10, 1, and 0.1, respectively, of the metastable helium line towards the observer in the radial direction. The dotted lines mark the orbital phase angles φ. Only the scenarios involving a cold planetary wind result in a widely extended, high-density outflow. Specifically, a cold, day-side dominated outflow (S1) produces a more prominent leading stream compared to the trailing one. -- astro-ph.EP

Cold Day-side Winds Shape Large Leading Streams in Evaporating Exoplanet Atmospheres

by Keith CowingOctober 29, 2024September 18, 2025

Recent observations of planetary atmospheres in HAT-P-32 b and HAT-P-67 b reveal extensive outflows reaching up to hundreds of planetary radii. The helium 1083 nm light curves for these planets, […]

HAT-P-67 b

Cold Day-side Winds Shape Large Leading Streams in Evaporating Exoplanet Atmospheres

Determining The “Biosignature Threshold” For Life Detection On Biotic, Abiotic, or Prebiotic Worlds.

Icy Ocean Planet Research: NASA ROSES-25 Amendment 71: New Opportunity A.16 Cryosphere

Global Carbon Fixation In Earth’s Subsurface Biosphere

tinyRNA-seq: An Optimized Approach To Sequencing Tiny RNAs And Primitive RNA Genomes

Stellar Flares Rather Than High Tint As Possible Cause For the Missing Methane In Young Exoplanets: The Case Study of V1298-Tau b