Interstellar Updates

 

These are items of interest to the interstellar exploration community that we’ve found in our quest for information that will help us advance toward our goals.  If you know of anything we’ve overlooked, or any sources of such information we should monitor, or if you would like to be added to our IRG-updates mailing list and receive these updates in you email every weekday, please send that information to info@irg.space.

You can now search our database of interstellar updates and find items of interest to you.

September 24, 2025 updates

What do the fundamental constants of physics tell us about life?
https://arxiv.org/abs/2509.09892

Is ozone a reliable proxy for molecular oxygen? – III. The impact of CH4 on the O2–O3 relationship for Earth-like atmospheres
https://www.aanda.org/articles/aa/full_html/2025/09/aa56015-25/aa56015-25.html

Magnetohydrodynamic simulations preliminarily predict the habitability and radio emission of TRAPPIST-1e
https://www.aanda.org/articles/aa/full_html/2025/09/aa55471-25/aa55471-25.html

Quantifying the Distribution of Europium in the Milky Way Disk: Its Connection to Planetary Habitability and the Source of the r-process
https://iopscience.iop.org/article/10.3847/2041-8213/adfb4d

A Comprehensive Analysis of Three Microlensing Planet Candidates with the Planet/Binary Degeneracy
https://arxiv.org/abs/2509.18345

A multi-object approach for studying exoplanet atmospheres using high-resolution spectrographs
https://arxiv.org/abs/2509.18721

A Scatter of Light from a Polarized World
https://arxiv.org/abs/2509.19172

Exploring the Sub-Neptune Frontier with JWST
https://arxiv.org/abs/2509.19247

September 23, 2025 updates

Surveying the stellar drivers of exoplanet evolution for the first time with the ESCAPE small explorer mission
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/13625/136250B/Surveying-the-stellar-drivers-of-exoplanet-evolution-for-the-first/10.1117/12.3063555.short

Intercepting 3I/ATLAS at Its Closest Approach to Jupiter with the Juno Spacecraft
https://www.mdpi.com/2226-4310/12/9/851

A Model for Massless Gravity: The Maths that makes Interstellar Drives possible.
https://zenodo.org/records/17176483

The Hot Neptune Initiative (HONEI) – II. TOI-5795 b: A hot super-Neptune orbiting a metal-poor star
https://www.aanda.org/articles/aa/full_html/2025/09/aa56081-25/aa56081-25.html

RAVEN: RAnking and Validation of ExoplaNets
https://arxiv.org/abs/2509.17645

Identifying close-in Jupiters that arrived via disk migration: Evidence of primordial alignment, preference of nearby companions and hint of runaway migration
https://arxiv.org/abs/2509.16322

Polarized Signatures of Variable Worlds: Modeling Heterogeneous Habitable Earth- and Early Mars-like (Exo)planets
https://arxiv.org/abs/2509.16338

Evaluation of the magnetic field of hot Jupiters within the geometric approach
https://arxiv.org/abs/2509.16565

Direct Imaging for the Debris Disk around ε Eridani with the Cool-Planet Imaging Coronagraph
https://arxiv.org/abs/2509.16761

Identifying rocky planets and water worlds among sub-Neptune-sized exoplanets with the Habitable Worlds Observatory
https://arxiv.org/abs/2509.16798

An Initial Assessment of the Hanle Echelle Spectrograph for Exoplanet Atmosphere Studies
https://arxiv.org/abs/2509.17142

Radial Velocity Strategies for the Orbital Refinement of Exoplanet Direct Imaging Targets
https://arxiv.org/abs/2509.17169

A Thick Volatile Atmosphere on the Ultra-Hot Super-Earth TOI-561 b
https://arxiv.org/abs/2509.17231

Improving radial velocity precision with CARMENES-PLUS:An upgrade of the near-infrared spectrograph cooling system
https://arxiv.org/abs/2509.17966

A Decade of Transit-Timing Measurements Confirm Resonance in the K2-19 System
https://arxiv.org/abs/2509.18031

Ionospheric Electron Heat Flow Modulates Planetary Ambipolar Electric Fields
https://arxiv.org/abs/2509.10218

September 22, 2025 Updates

Chronothetic and aspectual diachrony in Astrobiology: the inchoativity of Life
https://www.researchgate.net/publication/395479527_Chronothetic_and_aspectual_diachrony_in_Astrobiology_the_inchoativity_of_Life

Quantum Stellar Batteries (QSBs): A Theoretical Framework for Stellar‐Scale Energy Storage
https://www.preprints.org/manuscript/202508.2028/v2

Is ozone a reliable proxy for molecular oxygen? III. The impact of CH4 on the O2–O3 relationship for Earth-like atmospheres
https://www.aanda.org/articles/aa/full_html/2025/09/aa56015-25/aa56015-25.html

X-ray photodesorption of complex organic molecules in protoplanetary disks II. Formic acid, HCOOH
https://www.aanda.org/articles/aa/full_html/2025/09/aa55420-25/aa55420-25.html

Chemical transformation of CO in evolving protoplanetary discs across stellar masses: A route to C-rich inner regions
https://www.aanda.org/articles/aa/full_html/2025/09/aa55195-25/aa55195-25.html

Properties of Free-floating Planets Ejected through Planet–Planet Scattering
https://iopscience.iop.org/article/10.3847/1538-4357/adf4e2

Vertical Structure of Interstellar Dust in the Milky Way
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1585/8258955?searchresult=1

Astrometric exomoon detection by means of optical interferometry
https://arxiv.org/abs/2509.15304

Untapped: Veloce Detects Calcium in the Atmosphere of WASP-189b
https://arxiv.org/abs/2509.15306

THYME XIII: Two young Neptunes orbiting a 75-Myr star in the Alpha Persei Cluster
https://arxiv.org/abs/2509.15313

Dynamical Analysis of the HD 169142 Planet-Forming Disk: Twelve Years of High-Contrast Polarimetry
https://arxiv.org/abs/2509.15323

Detection and characterisation of a 106-day transiting Jupiter : TOI-2449 b / NGTS-36 b
https://arxiv.org/abs/2509.15424

ATREIDES I. Embarking on a trek across the exo-Neptunian landscape with the TOI-421 system
https://arxiv.org/abs/2509.15746

ExoIris: fast exoplanet transmission spectroscopy in Python
https://arxiv.org/abs/2509.15913

JWST-TST DREAMS: Sulfur dioxide in the atmosphere of the Neptune-mass planet HAT-P-26 b from NIRSpec G395H transmission spectroscopy
https://arxiv.org/abs/2509.16082

Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function
https://arxiv.org/abs/2509.16191

September 19, 2025 Updates

Triad for Space Civilization: Launch, Robotics, and Photonic Railways
https://www.liebertpub.com/doi/10.1177/21680256251378715

Direct Detection of Biosignature Gasses Using Corrosion-Resistant QIT-MS Sensor for Planetary Exploration
https://www.mdpi.com/2673-4125/5/2/17

The Temporal Organization of Life: Investigating the Conceptual, Ethical and Cosmological Implications of Astrobiology
https://link.springer.com/book/9783031813573

Insights from early life in the 3.45-Ga Kitty’s Gap Chert for the search for elusive life in the Universe
https://www.nature.com/articles/s41550-025-02661-0

Mechanochemical Reactivity of Ribonucleosides Mediated by Inorganic Species: Implications for Extraterrestrial Organic Matter Interpretation
https://www.mdpi.com/2076-3417/15/3/1363

Diversity in planetary architectures from pebble accretion: Water delivery to the habitable zone with pebble snow
https://arxiv.org/abs/2509.14101

Cosmic dust as a prerequisite for the formation of complex organic molecules in space?
https://arxiv.org/abs/2509.12967

ATREIDES I. Embarking on a trek across the exo-Neptunian landscape with the TOI-421 system
https://www.aanda.org/articles/aa/full_html/2025/09/aa54856-25/aa54856-25.html

A misaligned protostellar disk fed by gas streamers in a barred spiral-like massive dense core
https://www.science.org/doi/10.1126/sciadv.ady6953

Scientific Progress, Astrobiology and the Pursuit of Knowledge
https://www.cambridge.org/core/journals/philosophy-of-science/article/scientific-progress-astrobiology-and-the-pursuit-of-knowledge/0295665D3636BEE92E668FE9DA7D2857

Thomism and the Natural Sciences
https://www.cambridge.org/core/elements/thomism-and-the-natural-sciences/326B00E9FDAF28D8FDBE18995B4F4837

Metal-enriched Atmospheres in Warm (Super- and Sub-) Neptunes Induced by Extreme Atmospheric Escape
https://iopscience.iop.org/article/10.3847/1538-4357/add736

Who speaks for extraterrestrial ecosystems?: Why ET should have standing
https://www.sciencedirect.com/science/article/pii/S0265964625000463

Exoplanet shows signs of having a habitable atmosphere
https://www.sciencedirect.com/science/article/abs/pii/S0262407925015386

Mapping the SO2 Shoreline in Gas Giant Exoplanets
https://www.researchgate.net/publication/395649047_Mapping_the_SO2_Shoreline_in_Gas_Giant_Exoplanets

New Orbital Constraints for YSES 1 b and HR 2562 B from High-Precision Astrometry and Planetary Radial Velocities
https://arxiv.org/abs/2509.14321

KID Detector Readout Electronics Development for Habitable Worlds Observatory
https://arxiv.org/abs/2509.14363

Sibling Sub-Neptunes Around Sibling M Dwarfs: TOI-521 and TOI-912
https://arxiv.org/abs/2509.14782

The evolution of complex organic molecules during star formation
https://arxiv.org/abs/2509.15126

Measuring the Two-Dimensional Thermal Structures of Protoplanetary Disks
https://arxiv.org/abs/2509.15196

A carbon-rich disk surrounding a planetary-mass companion
https://arxiv.org/abs/2509.15209

September 18, 2025 updates

How Interstellar Objects Similar to 3I/ATLAS Could Jump-Start Planet Formation Around Infant Stars
https://www.europlanet.org/epsc-dps2025-how-interstellar-objects-similar-to-3i-atlas-could-jump-start-planet-formation-around-infant-stars/

X-SHYNE: X-Shooter spectra of young exoplanet analogs – II. Presentation and analysis of the full library
https://www.aanda.org/articles/aa/full_html/2025/09/aa54986-25/aa54986-25.html

Discovery of an icy and nitrogen-rich extrasolar planetesimal
https://academic.oup.com/mnras/article/543/1/223/8255944

Do Outer Giants Inflate Neptune-sized Planets? An Architecture-Dependent Mass–Radius Relation
https://academic.oup.com/mnrasl/advance-article/doi/10.1093/mnrasl/slaf098/8256834

Temporal evolution of the third interstellar comet 3I/ATLAS: Spin, color, spectra, and dust activity
https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202556717

Planet Earth in reflected and polarized light – III. Modeling and analysis of a decade-long catalog of Earthshine observations
https://arxiv.org/abs/2509.13415

Astrometric Methods for Detecting Exomoons Orbiting Imaged Exoplanets: Prospects for Detecting Moons Orbiting a Giant Planet in α Centauri A’s Habitable Zone
https://arxiv.org/abs/2509.13513

ARDENT: A Python package for fast dynamical detection limits with radial velocities
https://arxiv.org/abs/2509.13521

Volatile-bearing mineral atmospheres of hot rocky exoplanets as probes of interior state and composition
https://arxiv.org/abs/2509.13610

Investigating aerosols as a reconciliation mechanism for K2-18 b JWST MIRI and NIRISS/NIRSpec observations
https://arxiv.org/abs/2509.13932

Diversity in planetary architectures from pebble accretion: Water delivery to the habitable zone with pebble snow
https://arxiv.org/abs/2509.14101

Transit Timing Variations in HIP 41378: CHEOPS and TESS confirm a non-transiting sixth planet in the system
https://arxiv.org/abs/2509.14156

Possible Evidence for the Presence of Volatiles on the Warm Super-Earth TOI-270 b
https://arxiv.org/abs/2509.14224