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.

November 26, 2025 updates

Boiling oceans and compressional tectonics on emerging ocean worlds
https://www.nature.com/articles/s41550-025-02713-5

FAS-XAI: Fuzzy and Explainable AI for Interpretable Vetting of Kepler Exoplanet Candidates
https://www.mdpi.com/2227-7390/13/23/3796

Estimating The Number of Intelligent Extraterrestrial Civilizations: A Probabilistic Approach to the Drake Equation
https://zenodo.org/records/17720863

20 GeV halo-like excess of the Galactic diffuse emission and implications for dark matter annihilation
https://iopscience.iop.org/article/10.1088/1475-7516/2025/11/080

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. VI. Evidence for Radially Evolving Icy Grains in the HD 141569A Disk via NIRCam Coronagraphic Imaging
https://iopscience.iop.org/article/10.3847/1538-4357/ae0615

Modeling Atmospheric Ion Escape from Kepler-1649 b and c over Time
https://iopscience.iop.org/article/10.3847/2041-8213/ae1a65

Planetary Habitability Under the Light of a Rapidly Changing Star
https://arxiv.org/abs/2511.19646

TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain
https://arxiv.org/abs/2511.20074

Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B
https://arxiv.org/abs/2511.20091

Simulating the Stellar Bycatch: Constraining the Prevalence of Extraterrestrial Transmitters within Radio SETI Surveys
https://arxiv.org/abs/2511.20231

Projections of Earth’s Technosphere: Strategies for Observing Technosignatures on Terrestrial Exoplanets
https://arxiv.org/abs/2511.20329

Diversity of low-mass planet atmospheres in the C-H-O-N-S-Cl system with interior dissolution, nonideality, and condensation: Application to TRAPPIST-1e and sub-Neptunes
https://arxiv.org/abs/2507.00499

Measuring Cometary Nuclei Behind Bright Comae: PSF Delta Decomposition with Bicubic Resampling and an Application to Interstellar Comet 3I/ATLAS C/2025 N1
https://arxiv.org/abs/2511.19467

November 25, 2025 updates

Hypothesis of Entropic-Temporal Coupling for Anomalous Interstellar Objects: An Application of the Finite and Consumable Time Theory (FCT/TTC)
https://zenodo.org/records/17704028

Modelling the Atmosphere of Young Exoplanet V1298 Tau b
https://zenodo.org/records/17692775

Dissecting the puzzle of tectonic lid regimes in terrestrial planets
https://www.nature.com/articles/s41467-025-65943-1

Regular variability of planet-hosting stars as a periodic environmental driver for prebiotic chemistry
https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/regular-variability-of-planethosting-stars-as-a-periodic-environmental-driver-for-prebiotic-chemistry/306433A839D9860122130A4804082B2E

Revised Mass and Orbit of ε Eridani b: A 1 MJup Planet on a Near-circular Orbit
https://iopscience.iop.org/article/10.3847/1538-3881/ae0cbd

Evolution of Terrestrial Planetary Bodies and Implications for Habitability
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025RG000902

Spectrophotometric evidence for a metal-bearing, carbonaceous, and pristine interstellar comet 3I/ATLAS
https://arxiv.org/abs/2511.19112

Evidence of 1:1 slope between rocky Super-Earths and their host stars
https://arxiv.org/abs/2511.17717

Resonant structures in exozodiacal clouds created by exo-Earths in the habitable zone of late-type stars
https://arxiv.org/abs/2511.17872

The Albedo Problem and Cloud Cover on Hot Jupiters
https://arxiv.org/abs/2511.18497

A Smooth Transition from Giant Planets to Brown Dwarfs from the Radial Occurrence Distribution
https://arxiv.org/abs/2511.18758

Numerical Non-Adiabatic Tidal Calculations with GYRE-tides: The WASP-12 Test Case
https://arxiv.org/abs/2511.18769

November 24, 2025 Updates

Planet Habitability under Energy Balance and Resource Carrying Capacity
https://www.icck.org/article/abs/jer.2025.128588

Dust distribution in circumstellar disks harboring multi-planet systems: I. Sub-thermal mass planets
https://www.aanda.org/articles/aa/full_html/2025/11/aa56463-25/aa56463-25.html

Detection of CO2, CO, and H2O in the atmosphere of the warm sub-Saturn HAT-P-12 b
https://www.aanda.org/articles/aa/full_html/2025/11/aa50690-24/aa50690-24.html

Detection and characterisation of a 106-day transiting Jupiter: TOI-2449 b/NGTS-36 b
https://www.aanda.org/articles/aa/full_html/2025/11/aa55168-25/aa55168-25.html

N2-broadening coefficients and their temperature exponents for ethylene lines: A semi-empirical approach for (exo)planetary studies
https://www.sciencedirect.com/science/article/abs/pii/S0022407325004200

On the transitional character and regularity of planetary abiogenesis
https://www.sciencedirect.com/science/article/abs/pii/S0303264725002709

Detectability of Dust and Ion Tails of Interstellar Comet 3I/ATLAS by Europa Clipper
https://iopscience.iop.org/article/10.3847/2515-5172/ae2120

Evidence of Titanate Clouds in the Dayside Atmosphere of the Ultrahot Jupiter WASP-121b
https://iopscience.iop.org/article/10.3847/2041-8213/ae1c1c

Ever Elusive Exospheres: One Probable Detection and Two Nondetections of Hα Transits in Young Systems
https://iopscience.iop.org/article/10.3847/1538-3881/ae1504

The Surface and Interior Conditions of Temperate Sub-Neptune TOI-270 d
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1969/8340351

Habitable from the start: How initial planetary formation conditions may create habitable worlds
https://arxiv.org/abs/2511.16714

The Surface and Interior Conditions of Temperate Sub-Neptune TOI-270 d
https://arxiv.org/abs/2511.16722

A Comprehensive Analysis of the Panchromatic Transmission Spectrum of the Hot-Saturn WASP-96 b: Nondetection of Haze, Possible Sodium Limb Asymmetry, Stellar Characterization, and Formation History
https://arxiv.org/abs/2511.16771

November 21, 2025 updates

Discriminating abiotic and biotic organics in meteorite and terrestrial samples using machine learning on mass spectrometry data
https://academic.oup.com/pnasnexus/article/4/11/pgaf334/8323799

A Flux-Based Estimate of the Interstellar Object Contribution to the Galactic Baryon Budget
https://zenodo.org/records/17668687

Planetary dynamos driven by semi-convection in stratified layers
https://arxiv.org/abs/2506.18521

SPORES-HWO. II. Companion Mass Limits and Updated Planet Properties for 120 Future Exoplanet Imaging Targets from 35 yr of Precise Doppler Monitoring
https://iopscience.iop.org/article/10.3847/1538-3881/ae0b62

Biophysics of Life: Origin and Evolution
https://www.sciencedirect.com/book/monograph/9780443363689/biophysics-of-life

Natural Comet or Technological Artefact? A Bayesian Evaluation of 3I/ATLAS Incorporating the Loeb Scale.
https://www.researchgate.net/publication/397795856_Natural_Comet_or_Technological_Artefact_A_Bayesian_Evaluation_of_3IATLAS_Incorporating_the_Loeb_Scale

Dynamical simulation of the Interstellar Comet 3I/ATLAS
https://www.arxiv.org/abs/2511.16247

Efficiency of Hydrodynamic Atmospheric Escape in Hot Jupiters and Super Earths
https://arxiv.org/abs/2511.15787

Methane on the temperate exo-Saturn TOI-199b
https://arxiv.org/abs/2511.15835

Analytical Solutions for Planet-Scattering Small Bodies
https://arxiv.org/abs/2511.16056

Coupled atmospHere Interior modeL Intercomparison (CHILI) Protocol Version 1.0: A CUISINES Intercomparison Project of Magma Ocean Models
https://arxiv.org/abs/2511.16142

Grain growth in protoplanetary disks in the Upper Scorpius revealed by millimeter-wave spectral indices
https://arxiv.org/abs/2511.16405

A homogeneous TTV investigation of all TESS systems with a confirmed single transiting planet
https://arxiv.org/abs/2511.16504

Disc fragmentation. I. Ejection of Jupiter-mass Free Floating Planets from growing binary systems
https://arxiv.org/abs/2511.16508

Searching for close-in planets around TWA 7 with SPIRou
https://arxiv.org/abs/2511.16609

Excitation of Inertial Modes in 3D Simulations of Rotating Convection in Planets and Stars
https://arxiv.org/abs/2511.16630

Dust Recycling and Icy Volatile Enhancement (DRIVE): A Novel Method of Volatile Enrichment in Cold Giant Planets
https://arxiv.org/abs/2511.07590

November 20, 2025 updates

Beyond the habitable zone: Exoplanet atmospheres are next clue to finding life on planets orbiting distant stars
https://phys.org/news/2025-11-habitable-zone-exoplanet-atmospheres-clue.html

Evidence of a gap in the envelope mass fraction of sub-Saturns
https://www.aanda.org/articles/aa/full_html/2025/11/aa56560-25/aa56560-25.html

Resolving the flat-spectrum conundrum: clumpy aerosol distributions in sub-Neptune atmospheres
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf2066/8329173

Kepler-1624b Has No Significant Transit Timing Variations
https://iopscience.iop.org/article/10.3847/1538-3881/ae1464

Separating Flare and Secondary Atmospheric Signals with RADYN Modeling of Near-infrared JWST Transmission Spectroscopy Observations of TRAPPIST-1
https://iopscience.iop.org/article/10.3847/2041-8213/ae1960

N2-broadening coefficients and their temperature exponents for ethylene lines: A semi-empirical approach for (exo)planetary studies
https://www.sciencedirect.com/science/article/abs/pii/S0022407325004200

Prebiotic Gels as the Cradle of Life
https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/syst.202500038

Exoplanet Detection Techniques: From Classical Methods to Modern Machine Learning Approaches
https://www.ewadirect.com/proceedings/tns/article/view/29784

Stellar Obliquities of Young Systems, Atmospheres Undergoing Contraction and Escape (SOYSAUCE): a likely aligned orbit for the 3 Myr planet TIDYE-1 b
https://arxiv.org/abs/2511.14838

Refractive indices of photochemical haze analogs for Solar System and exoplanet applications : a cross-laboratory comparative study between the PAMPRE and COSmIC experimental set-ups
https://arxiv.org/abs/2511.15310

A JWST Transit of a Jupiter Analog: II. A Search for Exomoons
https://arxiv.org/abs/2511.15317

Efficient Exoplanet Imaging Simulations of the Habitable Worlds Observatory
https://arxiv.org/abs/2511.15511