October 2025 – Page 24 – My WordPress Site

Examples of the template extraction from the atmospheric models at JWST’s spectral resolution (top panels) for three molecules, H2O (left column panels), CH4 (middle column panels) and CO (right column panels), using three different normalization approaches. The second, third, and final rows show the resulting normalized templates using the polynomial fitting, Gaussian, and high-pass frequency filtering approaches, respectively. -- astro-ph.EP

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

Testing The Performance Of Cross-correlation Techniques To Search For Molecular Features In JWST NIRSpec G395H Observations Of Transiting Exoplanets

by Keith CowingOctober 2, 2025October 2, 2025

The inside of Enceladus larger image -- ESA

Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Enceladus, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Missions & Hardware, Saturn, Water/Hycean Worlds & Oceanography

Cassini Proves The Existence Of Complex Chemistry Within Enceladus’ Ocean

by Keith CowingOctober 1, 2025October 1, 2025

Results of the forward modeling of β Pic b using the most recent spectro/photometric observations of the planet (including CRIRES+) using BT-Settl. Top panel: spectra (points) and photometry (squares) of β Pic b alongside a Rλ ∼ 4 000 spectrum extracted using the best fit parameters for the inversion. Observations have been re-normalized using the analytic scaling factors computed during the inversion. Associated residuals are shown below. Dotted lines represents the ±σ (68%) confidence interval. Bottom sub-panels: zoom versions of the top panel on GRAVITY (upper left), SINFONI (upper right), CRIRES+-K (lower left) and CRIRES+-M (lower right). Similarly to Landman et al. (2024), each CRIRES+ spectra are shown smoothed by their retrieved broadening to show the planet features more clearly. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Beta Pictoris, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy

Multi-modal Atmospheric Characterization Of beta Pictoris b: Adding High-resolution Continuum Spectra From GRAVITY

by Keith CowingOctober 1, 2025October 1, 2025

Climate simulations of Venus’s atmosphere.

AI - Data - Apps - Cybernetics, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Venus

The Open-Source Photochem Code: A General Chemical and Climate Model for Interpreting (Exo)Planet Observations

by Keith CowingOctober 1, 2025October 1, 2025

Parameter space showing the effect of GR on eccentricity oscillations due to an exterior planetary companion for a variety of combinations of the mass ratio m2/m1 and semi-major axis ratio a2/a1. The interior planet was assumed to be a 1 M⊕ planet at 0.01 AU. When ξ < 1 (bottom-left, red), GR amplifies eccentricity oscillations; when ξ > 1 (top-right, black), GR suppresses them. The dashed line marks the transition as derived in F. C. Adams & G. Laughlin (2006). -- astro-ph.EP

Exoplanets, -moons, -comets, Habitable Zones, Stellar Cartography

General Relativity Can Prevent a Runaway Greenhouse on Potentially Habitable Planets Orbiting White Dwarfs

by Keith CowingOctober 1, 2025October 1, 2025

Kultur von Hypomyces completus Public Domain, Quelle: US Department of Agriculture, Agricultural Research Service, Systematic Botany and Mycology Laboratory, [1] Larger image

Biosignatures & Paleobiology, Fossils & Paleontology, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Origin & Evolution of Life

Fungi Set The Stage For Life On Land Hundreds Of Millions Of Years Earlier Than Thought

by Keith CowingOctober 1, 2025October 1, 2025

JWST MIRI MRS spectra of DQ Tau. Various colors mark the different observing epochs, whose dates and the corresponding orbital phases are indicated in the upper left corner. The bottom panel shows the continuum-subtracted spectra shifted along the y axis for clarity. -- astro-ph

Astrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar

Space Dust Is Spongier Than We Thought

by Keith CowingOctober 1, 2025October 1, 2025

LIFE RCN Workshop

Biosignatures & Paleobiology, Conferences and Meetings, Genomics, Proteomics, Bioinformatics, Video, Audio, Webcasts, Podcasts

LIFE NASA RCN Seminar Series: Dating LUCA Using Ancient Protein Family Phylogenies

by Keith CowingOctober 1, 2025

A collection of photometric fluxes and spectra of T Cha are shown. The blue vertical lines represent the variability in optical fluxes (Alcalá et al. 1993). IR photometric fluxes are from 2MASS, WISE, IRAC, IRAS, and Herschel. The millimetre band fluxes correspond to ALMA at 0.85 and 3 mm, SEST at 1.3 mm, and ATCA at 3.3 mm. The mid-IR spectra from Spitzer (grey) and JWST (orange) shows a varying continuum. Inset figure: The AIBs at 6.2, 8.1, and 11.3 µm, prominently appearing in the JWST spectrum, are marked. The two strong lines in the JWST spectrum correspond to the fine-structure [Ar ii] 6.98 µm and [Ne ii] 12.81 µm transitions. -- astro-ph.SR

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar

Polycyclic Aromatic Hydrocarbon (PAH) Abundances In The Disk Around T Chamaeleontis (T Cha): PAH Sizes, Ionization Fraction, And Mass During JWST Observations

by Keith CowingOctober 1, 2025October 1, 2025

Assembly formed by primordial peptides as observed by bright field Microscopy Credit Frenkel-Pinter Lab

Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life

New Study Reveals Why Nature Picked Today’s Proteins

by Keith CowingOctober 1, 2025October 1, 2025