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.

March 13, 2026 updates

Searching for Life-As-We-Don’t-Know-It: Mission-relevant Application of Assembly Theory for Exoplanet Life Detection
https://arxiv.org/abs/2603.08780

The ocean worlds science case for the Pollux spectropolarimeter
https://arxiv.org/abs/2603.11112

Atmospheric Escape Rates from Mars – If it Orbited an Old M-Dwarf Star
https://arxiv.org/abs/2603.11561

Masses of Potentially Habitable Planets Characterized by the Habitable Worlds Observatory
https://arxiv.org/abs/2603.11146

Cold giant discoveries from a joint radial-velocity and astrometry framework
https://arxiv.org/abs/2603.11202

Islands of Electromagnetic Tranquility in Our Galactic core and Little Red Dots that Shelter Molecules and Prebiotic Chemistry
https://arxiv.org/abs/2509.17484

Stars in the neighborhood of Sagittarius A* follow primary centric framework
https://link.springer.com/article/10.1007/s11038-026-09582-6

Searching for Exotrojans in Pulsar Systems
https://iopscience.iop.org/article/10.3847/1538-4357/ae4317

Carbonated Chondrites during Giant Impacts
https://iopscience.iop.org/article/10.3847/PSJ/ae4488

Probing the photoabsorption features and electronic excited states of propylene oxide: an experimental and theoretical study
https://pubs.rsc.org/en/content/articlelanding/2026/cp/d6cp00031b

Bottom-up Formation of Phenol (C6H5OH) in Interstellar Analog Ices of Acetylene and Water Exposed to Ionizing Radiation
https://iopscience.iop.org/article/10.3847/1538-4357/ae48fa

March 12, 2026 Updates

Lasting biosignatures for 165 million years in lichens detected by multiple spectroscopies and the implication for extreme environmental and exoplanetary life exploring
https://link.springer.com/article/10.1007/s10509-026-04558-4

The Multifaceted Potential of Fungi in Extraterrestrial Environments: Exploring Mushrooms in Space
https://rsnz.onlinelibrary.wiley.com/doi/10.1002/nzb2.70066

Oxygenated False Positive Biosignatures in Mars-like Exoplanet Atmospheres
https://arxiv.org/abs/2603.11017

Evaluating the spatial intra-pixel sensitivity variations and influence based on space observation
https://arxiv.org/abs/2603.10355

Effects of stellar X-ray photoevaporation on planetesimal formation via the streaming instability
https://www.aanda.org/articles/aa/full_html/2026/03/aa57793-25/aa57793-25.html

Image classification for optical resident space object surveys with machine learning
https://www.sciencedirect.com/science/article/abs/pii/S0094576526001839

A test of the Dedalus software for exoplanet atmospheric dynamics
https://arxiv.org/abs/2603.10076

Detection of periodic transit timing variations in warm sub-Saturn HD 332231 b
https://arxiv.org/abs/2603.10497

Identifying and Measuring Satellite Streaks in DECam Images
https://arxiv.org/abs/2603.10790

At the stellar noise frontier: a transit survey of 121 TESS M3-M6 dwarfs
https://arxiv.org/abs/2603.10247

A stellar prominence eruption associated with a white-light flare on an M dwarf observed simultaneously by LAMOST and TESS
https://www.aanda.org/articles/aa/full_html/2026/03/aa57269-25/aa57269-25.html

TOI-4616 b: a benchmark Earth-sized planet transiting a nearby M4 dwarf
https://arxiv.org/abs/2603.10905

Gaia-GIC-1: An Evolving Catastrophic Planetesimal Collision Candidate
https://arxiv.org/abs/2603.10952

Interstellar Object 3I/ATLAS Observed from Mars by China’s Tianwen-1 Spacecraft
https://arxiv.org/abs/2603.10350

March 11, 2026 updates

Exo–IPM Scattering as a Hidden Gatekeeper of Narrowband Technosignatures
https://iopscience.iop.org/article/10.3847/1538-4357/ae3d33

Extraterrestrial Hydrometeological Phenomena and Their Communicative Implications Interpretive Journalism Perspective
https://zenodo.org/records/18875181

A broad perspective on Galactic life
https://www.nature.com/articles/s41550-026-02803-y

Eating planets makes you younger: The magnetic dynamo rejuvenation of GJ 504 by planetary engulfment
https://www.aanda.org/articles/aa/full_html/2026/03/aa59144-26/aa59144-26.html

True masses using radial velocity data with HIPPARCOS and Gaia astrometry
https://www.aanda.org/articles/aa/full_html/2026/03/aa56735-25/aa56735-25.html

Precomputed aerosol extinction, scattering, and asymmetry grids for scalable atmospheric retrievals
https://www.aanda.org/articles/aa/full_html/2026/03/aa58469-25/aa58469-25.html

Giant Outer Transiting Exoplanet Mass (GOT’EM) survey: VII. TOI-6041: A multi-planet system including a warm Neptune exhibiting strong transit-timing variations
https://www.aanda.org/articles/aa/full_html/2026/03/aa56700-25/aa56700-25.html

Time-Domain Photometry and Activity Evolution of Interstellar Comet 3I/ATLAS with BHTOM
https://arxiv.org/abs/2603.01383

A second visit to Eps Ind Ab with JWST: new photometry confirms ammonia and suggests thick clouds in the exoplanet atmosphere of the closest super-Jupiter
https://arxiv.org/abs/2603.08780

The Influence of Clouds and Deuterium-Burning on Brown Dwarf Habitable Zones
https://arxiv.org/abs/2603.09068

Worlds Next Door. IV. Mapping the Late Stages of Giant Planet Evolution with a Precise Dynamical Mass and Luminosity for ε Ind Ab
https://arxiv.org/abs/2603.08787

Two Low Mass-Ratio Microlensing Planets and Two Types of Central-Resonant Degeneracy
https://arxiv.org/abs/2603.09045

Mass Production of 2023 KMTNet Microlensing Planets I: Low Mass Ratio
https://arxiv.org/abs/2603.09239

Atmospheric Collapse and Habitability on Tidally-Locked Exoplanets
https://arxiv.org/abs/2603.09260

The Key to Unlocking Exoplanet Biosignatures: a UK-led IR Spectrograph for the Habitable Worlds Observatory Coronagraph
https://arxiv.org/abs/2603.09321

From planetesimals to planets with N-body simulations in the giant-planet formation region
https://arxiv.org/abs/2603.09351

Data reduction method for OPTICAM multiband time series of transiting exoplanets
https://arxiv.org/abs/2603.09922

Hunting for methanol in the water rich, planet forming disk around HL Tau
https://arxiv.org/abs/2603.04322

March 10, 2026 updates

SCG-HMH (Consolidated concepts) What I think the future should look like
https://zenodo.org/records/18916931

The SCG-HMH Giga factory Concept
https://zenodo.org/records/18925333

Jam-packed star system is most compact of its kind ever found
https://www.nature.com/articles/d41586-026-00667-w

On Perihelion Predictions for Visiting Interstellar Cometary Objects
https://bis-space.com/shop/product/jbis-078-11-0389/

Project Icarus: The Pegasus Spacecraft Concept Design ICF Propulsion for an Interstellar Rendezvous Mission _ Part A
https://bis-space.com/shop/product/jbis-078-12-0402/

Project Icarus: The Pegasus Spacecraft Concept Design ICF Propulsion for an Interstellar Rendezvous Mission _ Part B
https://bis-space.com/shop/product/jbis-078-12-0422/

Universal energy limits of radiation belts in planetary and brown dwarf magnetospheric systems
https://www.science.org/doi/10.1126/sciadv.aea4945

CH3OH and HCN in Interstellar Comet 3I/ATLAS Mapped with the ALMA Atacama Compact Array: Distinct Outgassing Behaviors and a Remarkably High CH3OH/HCN Production Rate Ratio
https://iopscience.iop.org/article/10.3847/2041-8213/ae433b

Dyson spheres on H-R diagram
https://arxiv.org/abs/2602.23270

Estimation of the tidal heating in the TRAPPIST-1 planets: Influence of the internal structure
https://www.aanda.org/articles/aa/full_html/2026/03/aa54529-25/aa54529-25.html

The GAPS programme at TNG: LXXI. A sub-Neptune suitable for atmospheric characterization in a multiplanet and mutually inclined system orbiting the bright K dwarf TOI-5789 (HIP 99452)
https://www.aanda.org/articles/aa/full_html/2026/03/aa57662-25/aa57662-25.html

Predicting Gaia astrometry’s ability to constrain the populations of circumbinary planets
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag450/8507228

Heat Reveals What Clouds Conceal: Global Carbon and Longitudinally Asymmetric Chemistry on LTT 9779 b
https://iopscience.iop.org/article/10.3847/1538-3881/ae4494

Limits On the Posteclipse Emission Spectrum of HD 80606 b From High-resolution Spectroscopy
https://iopscience.iop.org/article/10.3847/1538-3881/ae45a7

HD 164604 c: A Second Giant Planet on a 15 Yr Orbit and Constraints on the Planet–Planet Mutual Inclination
https://iopscience.iop.org/article/10.3847/1538-3881/ae4490

Dynamics of Planetary Rings under Thermal Forces
https://iopscience.iop.org/article/10.3847/2041-8213/ae4746

Nucleus and Postperihelion Activity of Interstellar Object 3I/ATLAS Observed by the Hubble Space Telescope
https://iopscience.iop.org/article/10.3847/2041-8213/ae471c

Three Saturn-mass Microlensing Planets Identified through Signals from Peripheral-caustic Perturbations
https://iopscience.iop.org/article/10.1088/1538-3873/ae477c

Hydrocarbon complexity and photochemical shielding of prebiotic feedstock molecules in exoplanet atmospheres
https://www.sciencedirect.com/science/article/pii/S0019103526000989

Planetary systems under the effect of multiple flybys in the galactic bulge
https://www.sciencedirect.com/science/article/abs/pii/S003206332600022X

Isotopic Evidence for a Cold and Distant Origin of the Interstellar Object 3I/ATLAS
https://arxiv.org/abs/2603.06911

NASA’s Pandora SmallSat Mission: Simulated Modeling and Retrieval of Near-Infrared Exoplanet Transmission Spectra
https://arxiv.org/abs/2603.04488

Exoplanet Synchronization in the Habitable Zone: Learning from Venus’ Retrograde Rotation
https://iopscience.iop.org/article/10.3847/1538-3881/ae43e4

Implications of the Pessimistic Lower Limit on the Drake Equation
https://arxiv.org/abs/2603.02372

A Direct View of the Chemical Properties of Water from Another Planetary System: Water D/H in 3I/ATLAS
https://arxiv.org/abs/2603.07026

High nitrogen and carbon isotopic ratios in the interstellar comet 3I/ATLAS
https://arxiv.org/abs/2603.07187

Broadband SETI: a New Strategy To Find Nearby Alien Civilizations
https://arxiv.org/abs/2603.07333

Forecasting Catastrophe: Constraints on the Fomalhaut Main Belt Planetesimal Population from Observed Collisional Remnants
https://arxiv.org/abs/2603.07376

Dust distribution in circumstellar disks harboring multi-planet systems. II. Super-thermal mass planets
https://arxiv.org/abs/2603.07711

Post-perihelion Coma Composition of the Interstellar Comet 3I/ATLAS from Optical Spectroscopy
https://arxiv.org/abs/2603.07718

March 09, 2026 Updates

Is the high-energy environment of K2-18b special?
https://www.aanda.org/articles/aa/full_html/2026/03/aa57601-25/aa57601-25.html

TOI-3288 b and TOI-4666 b: Two gas giants transiting low-mass stars characterised by NIRPS
https://www.aanda.org/articles/aa/abs/2026/03/contents/contents.html

A Study of Stability and Quintessence Polytropic Matter with Thin Shell Wormholes in Exponential Gravity
https://www.sciencedirect.com/science/article/pii/S0550321326000866

A Narrowband Technosignature Search toward the Hycean Candidate K2-18 b Using the VLA and MeerKAT
https://iopscience.iop.org/article/10.3847/1538-3881/ae448e

Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey. IV. Lens Mass and Distance Measurements
https://iopscience.iop.org/article/10.3847/1538-3881/ae43e6

MANGOS II: Five new giant planets orbiting low-mass stars
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag448/8509368?searchresult=1

Exocomets of β Pictoris II: Two dynamical families of exocomets simulated with REBOUND
https://arxiv.org/abs/2603.05600

Global Abiotic Sulfur Cycling on Earth-like Terrestrial Planets
https://arxiv.org/abs/2603.06124

Star-based Navigation in the Outer Solar System
https://arxiv.org/abs/2603.06247