October 2024 – Page 7 – My WordPress Site

NIRCam sub-array PCA reduction at F444W shows 2 sources: S1 and S2 are both extended. Two different stretches of the reduced image are superimposed to emphasize the sources; the colorbar is applicable to the inner region only. Details of the analysis are presented in the Appendix. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy

Searching for Planets Orbiting Vega with the James Webb Space Telescope

by Keith CowingOctober 23, 2024October 23, 2024

The R∼300 spectrum of Archean Earth around AD Leo with a) 5-part division and b) 10-part division. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy

Reading Between the Rainbows: Comparative Exoplanet Characterisation through Molecule Agnostic Spectral Clustering

by Keith CowingOctober 23, 2024October 23, 2024

The weighted abundance of CO calculated using Equation 1 has been shown as a heat map as a function of C/O and Kzz in each panel. Each row corresponds to a different Teq value from 1100 K to 600 K from top to bottom. Each column correspond to a different Tint value between 30 K and 500 K from left to right. Note that the C/O has been shown relative to the assumed solar value of 0.458 in this plot. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Ice Giant, Imaging & Spectroscopy, Neptune

Effects of Planetary Parameters on Disequilibrium Chemistry in Irradiated Planetary Atmospheres: From Gas Giants to Sub-Neptunes

by Keith CowingOctober 23, 2024May 12, 2025

An icy Moon orbiting a Jupiter-sized Gas Giant -- Grok via Astrobiology.com

AI - Data - Apps - Cybernetics, Apps - Games, Astrogeology, Europa, Icy Worlds, Jupiter

MultIHeaTS: A Fast and Stable Thermal Solver for Multilayered Planetary Surfaces

by Keith CowingOctober 22, 2024October 22, 2024

An exoplanet with a thick atmosphere -- Grok via Astrobiology.com

AI - Data - Apps - Cybernetics, Apps - Games, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets

Cthulhu: An Open Source Molecular and Atomic Cross Section Computation Code for Substellar Atmospheres

by Keith CowingOctober 22, 2024October 22, 2024

Block diagram of the proposed multi-physics simulation model LunaIcy. -- astro-ph.EP

Astrogeology, Biogeochemical Cycles & Geobiology, Callisto, Cryobiology, Europa, Ganymede, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Water/Hycean Worlds & Oceanography

LunaIcy: Exploring Europa’s Icy Surface Microstructure through Multiphysics Simulations

by Keith CowingOctober 22, 2024October 22, 2024

Maximum reached by the imaginary part of the semidiurnal surface pressure component given by Eq. (2.4) as a function of the atmospheric opacity and radiative cooling frequency. The black solid and dashed lines define, from below, regions where the thermotidal response is sufficient to cancel the gravitational counterpart in the Precambrian (4587−538 Myr) and the late Paleozoic/early Mesozoic (350−250 Myr). The shaded areas indicate the contraints on αA and σ0 derived from observations and GCM simulations, along with the corresponding radiative timescales. The yellow and red arrows indicate the amplification factors needed to reach the Precambrian and Mesozoic/Paleozoic thresholds, respectively. The pink and green dots represent the GCM simulations of Wu et al. (2023), Fig. S4 (W23), and of Deitrick & Goldblatt (2024), Fig. 1 (DG24), respectively. Figure adapted from F24, Fig. 5. -- astro-ph.EP

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones

Thermal Tides On Rocky Planets Through A Novel Fully Analytical Solution

by Keith CowingOctober 22, 2024October 22, 2024

Flux contrast ratio of an Archean Earthlike planet with CO/CH4 = 10 as a function of wavelength. The input forward model is shown by the red circles, and the retrieval result is overlain and separated by molecule to show the individual molecular contributions. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy

The Detectability of CH4/CO2/CO and N2O Biosignatures through Reflection Spectroscopy of Terrestrial Exoplanets

by Keith CowingOctober 22, 2024October 22, 2024

Novolazarevskaya Station, Antarctica -- Wikipedia

Analog Studies, Arctic / Antarctic / Alpine, Atmospheres, Climate, Weather, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Dale Andersen's Field Reports, Exploration Gear & Tech, Extremeophiles and Extreme Environments, Habitable Zones, Icy Worlds, Life Support Systems, Mapping, Geodesy, Cartography, Microbiology & Virology, Nomenclature, Systematics, Natural History, Polar / Alpine Expeditions, ROVs/Submersibles/Diving, Tricorders & Sensors, Water/Hycean Worlds & Oceanography

Dale Andersen’s Astrobiology Antarctic Status Report: 20 October 2024: Arrival at Novolazarevskaya Station, Antarctica

by Keith CowingOctober 21, 2024January 11, 2026

Full NIRSpec and MIRI spectra for EDJ183-b and Per-emb35. The the ice absorption features are shaded in color. -- astro-ph.SR

Astrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy

JOYS+ Study Of Solid State 12C/13C Isotope Ratios In Protostellar Envelopes: Observations of CO and CO2 Ice with JWST

by Keith CowingOctober 21, 2024