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 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

November 19, 2025 updates

Independent Cross-Observatory Analysis of the 3I/ATLAS Perihelion Event (29–31 October 2025)
https://zenodo.org/records/17627290

Discovery of the Tidal Deformation of WASP-103b at 3 σ with CHEOPS: Nature and Physics of Tidal Deformation in Hot Jupiters and Impact of Orbital Eccentricity on Deformation
https://zenodo.org/records/17642965

EXOHOST conference Abstract book
https://zenodo.org/records/17607056

Fractal Aggregate Aerosols in the Virga Cloud Code. I. Model Description and Application to a Benchmark Cloudy Exoplanet
https://iopscience.iop.org/article/10.3847/1538-4357/ae0583

Hydrothermal Circulation and Seawater Chemistry: Links and Feedbacks
https://agupubs.onlinelibrary.wiley.com/doi/book/10.1002/9781394229185

3I/ATLAS: Interstellar Comet or Alien Ship?
https://zenodo.org/records/17535436

Theoretical foundations of building interstellar ships Beginner’s Guide Preliminary version
https://preprints.ru/article/2172

The atmospheric composition of TOI-270 d
https://arxiv.org/abs/2511.13830

TOI-333b: A Neptune Desert planet around a F7V star
https://arxiv.org/abs/2511.13832

Shaping the Mantle: The Role of the Superheated Core After Giant Impacts
https://arxiv.org/abs/2511.14041

The KPF SURFS-UP Survey I: Transmission Spectroscopy of WASP-76 b
https://arxiv.org/abs/2511.14175

A search for transit timing variations in the transiting hot Jupiter systems HIP 65, NGTS-6, NGTS-10 and WASP-173
https://arxiv.org/abs/2511.14634

Modelling the Milky Way’s exoplanet population based on cosmological galaxy simulations
https://arxiv.org/abs/2511.14704

Online learning of subgrid-scale models for quasi-geostrophic turbulence in planetary interiors
https://arxiv.org/abs/2511.14581

November 18, 2025 updates

NASA to Share Comet 3I/ATLAS Images From Spacecraft, Telescopes
https://www.nasa.gov/news-release/nasa-to-share-comet-3i-atlas-images-from-spacecraft-telescopes/

Interstellar comet 3I/ATLAS, an exceptional object: online observation – 19 Nov. 2025
https://www.youtube.com/watch?v=krU8gN-J9gY

Exoplanet Atmospheres and Habitability Inspired Optimization Algorithm
https://zenodo.org/records/17620575

Thirty years of new worlds
https://www.nature.com/natastron/volumes/9/issues/11

Proto-planetary disk composition-dependent element volatility in the context of rocky planet formation
https://www.aanda.org/articles/aa/full_html/2025/11/aa56011-25/aa56011-25.html

A decade of transit photometry for K2-19: Revised system architecture
https://www.aanda.org/articles/aa/full_html/2025/11/aa56436-25/aa56436-25.html

An Earthlike Density for the Temperate Earth-sized Planet GJ 12 b
https://iopscience.iop.org/article/10.3847/1538-3881/ae0f98

Early Evidence for Polar Orbits of Sub-Saturns around Hot Stars
https://iopscience.iop.org/article/10.3847/2041-8213/ae18c7

Rock vapour is opaque: implications for dynamics and observations of lava planets
https://arxiv.org/abs/2511.11800

Shaping the Mantle: The Role of Superheated Cores After Giant Impacts
https://arxiv.org/abs/2511.13436

The bulk metal content of WASP-80 b from joint interior-atmosphere retrievals: Breaking degeneracies and exploring biases with panchromatic spectra
https://arxiv.org/abs/2511.13483

Stellar Flares in the TESS Light Curves of Planet-hosting M dwarfs
https://arxiv.org/abs/2511.13716

On Bayesian inference considerations and other issues concerning Drake’s equation of Astrosociobiology
https://arxiv.org/abs/2511.11582

3D Modeling of Moist Convective Inhibition in Idealized Sub-Neptune Atmospheres
https://arxiv.org/abs/2409.18217