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.

April 23, 2026 Updates

Stellar flare-driven evolution of primordial early exo-Earth atmospheres: Insights from a Young M Dwarf Flare model
https://arxiv.org/abs/2604.20325

Sub-Neptunes Show a Stronger Correlation with Cold Jupiters than Super-Earths Especially in Metal-rich Systems
https://arxiv.org/abs/2604.20203

Stability of Multiplanet Systems Through Hot Jupiter Destruction
https://arxiv.org/abs/2604.19918

A giant solution to the disk mass budget problem of planet formation
https://arxiv.org/abs/2604.19917

Observational constraints on the chemical tracers of planet formation history
https://www.aanda.org/articles/aa/full_html/2026/04/aa57546-25/aa57546-25.html

The Effect of Large-scale Magnetic Fluctuations on Energetic Particle Profiles across Interplanetary Shocks
https://iopscience.iop.org/article/10.3847/1538-4357/ae5523

A Test of Substellar Evolutionary Models with High-precision Ages from Asteroseismology and Gyrochronology for the Benchmark System HR 7672AB
https://iopscience.iop.org/article/10.3847/1538-4357/ae4bdb

A Postperihelion Constraint on the CO2/H2O Ratio of Interstellar Comet 3I/ATLAS from [O I] Forbidden Lines
https://iopscience.iop.org/article/10.3847/1538-3881/ae578d

Using Astrometry to Break Degeneracies in Stellar Surface Mapping
https://arxiv.org/abs/2601.11737

Spectral Response of SPHEREx
https://iopscience.iop.org/article/10.3847/1538-4365/ae522c

The SPHEREx Ices Investigation: An Overview
https://iopscience.iop.org/article/10.3847/1538-4357/ae53e0

Science from the In Situ Exploration of the Proxima Centauri System
https://arxiv.org/abs/2604.20182

Journey from construction to excellence: How operations management and scientific results power LAMOST forward astronomy
https://link.springer.com/article/10.1007/s42524-026-6902-8

April 22, 2026 Updates

Status and Prospect of Secondary Battery Technologies in Space Applications: Challenges and the Future
https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/batt.70288

Synthetic biology-driven microbial protein factories for space
https://www.sciencedirect.com/science/article/pii/S295061662600015X

Behavioral micro-foundations for the space commons: A policy toolkit
https://www.sciencedirect.com/science/article/abs/pii/S0048733326001022

Molecular Evolution of H2O:O2 Ices at Different Temperatures in Simulated Space Environments. II. Evolution of Reaction Pathways
https://iopscience.iop.org/article/10.3847/1538-4357/ae579d

JWST Edge-on Disk Ice (JEDIce): Program Overview and Ice Survey Results
https://iopscience.iop.org/article/10.3847/1538-4357/ae5961

Ice as a Photochemical Shield: Adsorption Energetics and Spectroscopic Modulation of Interstellar Thiocyanates HCSCN and HCSCCH in TMC-1
https://arxiv.org/abs/2604.17536

ALMA Observations of Acetone in Hot Cores
https://arxiv.org/abs/2604.19472

The multi-planet system TOI-5624: Four transiting sub-Neptunes with an outer companion revealed by transit-timing variations
https://arxiv.org/abs/2604.15035

April 21, 2026 Updates

Epistemic Pluralism & Astrobiology
https://link.springer.com/article/10.1007/s10838-025-09760-6

Exoplanets: The Search for Earth’s Twin
https://link.springer.com/book/9783032226839

Core-Powered Mass-Loss of the Primary Atmospheres of Mini-Neptunes: Influence of Water Content in the Planet Interior and Evolution of the Host Star
https://link.springer.com/article/10.1134/S0038094626600095

Euclid Space Warps citizen science project helps hunt for strong gravitational lenses
https://phys.org/news/2026-04-euclid-space-warps-citizen-science.html

Proton Irradiation of Primitive Atmospheres of Young Exoplanets and Early Earth: N2O Greenhouse Warming and Prebiotic Synthesis
https://iopscience.iop.org/article/10.3847/2041-8213/ae5491

Thin H2-dominated Atmospheres as Signposts of Magmatic Outgassing on Tidally Heated Terrestrial Exoplanets
https://iopscience.iop.org/article/10.3847/PSJ/ae53e3

Carbon Cycle Imbalances on Arid Terrestrial Planets with Implications for Venus
https://arxiv.org/abs/2604.16846

Characterizing Earth analogs may require a moderate or high-resolution spectrograph
https://arxiv.org/abs/2604.17554

JWST Exoplanetary Worlds and Elemental Survey (JEWELS) II: Condensation Temperature Trends and Galactic Chemical Evolution in JWST Planet-Hosting Stars
https://arxiv.org/abs/2604.18115

Impact of Cold Jupiter Scattering on the Mean-Motion Resonance of Inner Small Planets
https://arxiv.org/abs/2604.18252

Rapid and Predictive Planet Population Synthesis Model (RAPPS) I. Upgraded model and resulting synthetic populations
https://arxiv.org/abs/2604.18273

Sensitivity of Dry Lava Planet Atmospheric Emission Spectra to Changes in Lava Compositions
https://arxiv.org/abs/2604.18301

The T16 Planet Hunt: 10,000 New Planet Candidates from TESS Cycle 1 and the Confirmation of a Hot Jupiter Around TIC 183374187
https://arxiv.org/abs/2604.18579

Technique-agnostic exoplanet demography for the Roman era — I. Testing a demography retrieval framework using simulated Kepler-like transit datasets
https://arxiv.org/abs/2509.24401

April 20, 2026 Updates

Implications for the formation of Oort cloud-like structures and interstellar comets in dense environments
https://www.aanda.org/articles/aa/full_html/2026/04/aa54978-25/aa54978-25.html

TOI-1259Ab: A warm Jupiter orbiting a K-dwarf white-dwarf binary on a low-obliquity orbit
https://www.aanda.org/articles/aa/full_html/2026/04/aa56348-25/aa56348-25.html

Extending TESS flare frequency distributions with CHEOPS: Power-law versus lognormal
https://www.aanda.org/articles/aa/full_html/2026/04/aa57721-25/aa57721-25.html

To boldly listen…
https://www.sciencedirect.com/science/article/abs/pii/S0262407926006184

PlanetNet-MMG: A Robust Multi-Modal Graph-Based Deep Learning Model for Exoplanet Candidate Classification
https://www.sciencedirect.com/science/article/abs/pii/S0957417426013096

Uniform Reinterpretation of Rocky Exoplanet Secondary Eclipse Observations and the Impact of Stellar and Orbital Uncertainties
https://arxiv.org/abs/2604.15421

The CARMENES search for exoplanets around M dwarfs. A homogeneous catalogue of projected rotational velocities accounting for limb-darkening
https://arxiv.org/abs/2604.15428

ExoNet: Multimodal Deep Learning for TESS Exoplanet Candidate Identification via Phase-Folded Light Curves, Stellar Parameters, and Multi-Head Attention Fusion
https://arxiv.org/abs/2604.15560

A gem system with a lava world and a habitable zone sub-Neptune orbiting TOI-1752
https://arxiv.org/abs/2604.15816

Benchmarking Two Chemical Networks used in General Circulation Models of Hot Jupiters
https://arxiv.org/abs/2604.15850

Beyond the mass-radius plane: Integrated radiative-convective and interior structure simulations of the exoplanet continuum
https://arxiv.org/abs/2604.15891

TTV-Not-So-Fast: Uniqueness and Degeneracy in Perturbing Planet Parameters
https://arxiv.org/abs/2604.16297

The Neptunian ridge as a natural outcome of high-eccentricity tidal migration
https://arxiv.org/abs/2604.16300

April 17, 2026 Updates

Cluster Anions of Hydrated Polycyclic Aromatic Hydrocarbons: “Magic” Water Tetramer
https://pubs.acs.org/doi/full/10.1021/acs.jpca.6c00211

Icy Volatile Enhancements in Evolving Protoplanetary Disks
https://arxiv.org/abs/2604.14124

Uncovering the Rapidly Evolving Orbits of the Dynamic TOI-201 System
https://www.science.org/doi/10.1126/sciadv.aef2618

GEMS JWST: HATS-75 b — A giant planet with a sub-solar metallicity atmosphere orbiting an M-dwarf
https://arxiv.org/abs/2604.07268

Carbon Cycle Imbalances on Arid Terrestrial Planets with Implications for Venus
https://iopscience.iop.org/article/10.3847/PSJ/ae4faa

SPHEREx Widefield Infrared Spectral Mapping of Interstellar Ices and Polycyclic Aromatic Hydrocarbons
https://iopscience.iop.org/article/10.3847/1538-4357/ae5180

A post-perihelion constraint on the CO/HO ratio of interstellar comet 3I/ATLAS from [O I] forbidden lines
https://arxiv.org/abs/2603.25002

Combining spectroscopy and wavefront control at deep contrast with photonic lanterns
https://arxiv.org/abs/2604.14276

A Fast and Physically Grounded Ocean Model for GCMs: The Dynamical Slab Ocean Model of the Generic-PCM (rev. 3423)
https://arxiv.org/abs/2604.14342

Simulating the interplay between the snowline pebble flux and ongoing planet formation and migration
https://arxiv.org/abs/2604.14358

Numerical investigation of particle acceleration at interplanetary shocks: diffusive and superdiffusive scenarios
https://arxiv.org/abs/2604.14819

The multi-planet system TOI-5624: four transiting sub-Neptunes with an outer companion revealed by transit-timing variations
https://arxiv.org/abs/2604.15035

Continuing to Advance European High Contrast Imaging Research and Development towards HWO and LIFE
https://arxiv.org/abs/2604.15077

Cloudy with a chance of metals: Indications of CO2 in the atmosphere of GJ 1214 b from high-resolution K-band spectroscopy
https://arxiv.org/abs/2604.15292

A Validated Low-to-Intermediate Mass Planetary Interior Structure Model and New Mass-Radius Relations
https://arxiv.org/abs/2604.15304

Planet formation constraints from exoplanet population synthesis and simulation based inference
https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2026.1736938/full

Long-period transiting exoplanets: advances in detection and characterization
https://arxiv.org/abs/2604.09254

A Planetary Illusion’s Funeral: Nondetection of a Gaia DR3 Exoplanet Candidate, and the Role of Intermediate-precision Radial Velocities in Gaia Exoplanet Follow-up
https://iopscience.iop.org/article/10.3847/1538-3881/ae4e2b

Exoplanet Orbital Distribution around FGK Sun-like Host Stars I: planet occurrence rate derived from the Kepler Mission and theoretical interpretations from planet formation
https://arxiv.org/abs/2604.08406

Machine Learning Identification of Exoplanet Transit Signals in Kepler Light Curve Data
https://pwvas.org/index.php/pwvas/article/view/1340

Unexplored Exoplanets in the Orion Constellation: A Proposal for Expanded European Research Interest
https://www.researchgate.net/publication/403606743_Unexplored_Exoplanets_in_the_Orion_Constellation_A_Proposal_for_Expanded_European_Research_Interest?_tp=eyJjb250ZXh0Ijp7ImZpcnN0UGFnZSI6ImxvZ2luIiwicGFnZSI6InNlYXJjaCIsInBvc2l0aW9uIjoicGFnZUhlYWRlciJ9fQ

UMI: GPU-Accelerated Asymmetric Robust Estimator for Photometric Detrending in Exoplanet Transit Searches
https://arxiv.org/abs/2604.06602

Discovering Earth 2.0: A Data-Driven Exploration of NASA’s Exoplanet Archive
https://ieeexplore.ieee.org/document/11468201

Quantum limits of exoplanet detection and localization
https://journals.aps.org/pra/abstract/10.1103/g6kr-mqdj

The Physics of Continuous Creation, Interstellar Star Drives and the Heisenberg Strut
https://zenodo.org/records/19557553

SOLAR SAIL WITH ELECTROCHROMIC MODULATION OF OPTICAL PROPERTIES FOR ULTRA LONG DURATION FLIGHT IN THE INTERSTELLAR MEDIUM
https://www.researchgate.net/publication/403659964_SOLAR_SAIL_WITH_ELECTROCHROMIC_MODULATION_OF_OPTICAL_PROPERTIES_FOR_ULTRA_LONG_DURATION_FLIGHT_IN_THE_INTERSTELLAR_MEDIUM

Oumuamua as a Potential Interstellar Probe from the Rigel System The Starchun
https://www.researchgate.net/publication/403628050_Oumuamua_as_a_Potential_Interstellar_Probe_from_the_Rigel_System_The_Starchun

In Consideration of Artificial Nanoprobes Jet Ejection from the Interstellar Object 3I/ATLAS
https://bis-space.com/shop/product/jbis-079-04-0122/

A gem system with a lava world and a habitable zone sub-Neptune orbiting TOI–1752
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag713/8654593

Machine Learning for Discovering Life Beyond Earth – autonomous strategies for new and unknown horizons
https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2026.1804102/abstract

The Lipidome of a Mars Analog Poly-Extreme Community in Atacama Halite Endolith: Chemotaxonomy, Lipid Adaptation, and Implications for the Search for Extraplanetary Biosignatures
https://journals.sagepub.com/doi/10.1177/15311074261441383

Detection of periodic transit timing variations in the warm sub-Saturn planet HD 332231 b
https://www.aanda.org/articles/aa/full_html/2026/04/aa57788-25/aa57788-25.html

Laplace–Legendre expansion of the planar planetary Hamiltonian
https://link.springer.com/article/10.1007/s10569-026-10289-z

Marchal’s family of periodic orbits I: Stability of inclined co-orbital planetary systems
https://link.springer.com/article/10.1007/s10569-026-10292-4

Evaluating the impact of mission architecture on crew dynamics in space exploration
https://www.nature.com/articles/s41526-026-00574-4

Detection of Exoplanets from TESS Imaging Data Using Unsupervised Machine Learning Techniques
https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2026.1800321/abstract

Deep Limits on Planets Exterior to HR 8799’s Known Planetary System with the James Webb Space Telescope
https://iopscience.iop.org/article/10.3847/1538-3881/ae43e8

Planetary Architectures of Kepler Compact Multiplanet Systems with Binary-star Companions
https://iopscience.iop.org/article/10.3847/1538-3881/ae5622

The Cohesive Object Sequence: The Mass–Density Distribution of Astronomical Objects from Asteroids to Stars
https://iopscience.iop.org/article/10.1088/1538-3873/ae58d1

A White-light Flare on the L1 Dwarf WISEP J190648.47+401106.8
https://iopscience.iop.org/article/10.3847/2515-5172/ae5f75

Ammonia as a parameter shaping habitability on icy moons
https://academic.oup.com/femsmicrobes/advance-article/doi/10.1093/femsmc/xtag015/8541858

Influence of CO versus CH₄ on organic haze formation in atmospheres of diverse terrestrial exoplanets
https://arxiv.org/abs/2604.03575