Jackie Villadsen et al 2026 ApJ 1005 51
No bursty radio emission characteristic of star–planet interaction was detected from a sample of five M dwarfs with close-in terrestrial planets, but researchers were able to place limits on the magnetic fields of the planets.
The post Upper Limits on Planet-Induced Gigahertz Radio Emission from Inactive M Dwarfs appeared first on AAS Nova.
SDSS Collaboration et al 2026 ApJS 285 9
For nearly three decades, the Sloan Digital Sky Survey has collected photometric and spectroscopic data for millions of objects; this article describes the most substantial data release to date for SDSS-V.
The post The Nineteenth Data Release of the Sloan Digital Sky Survey appeared first on AAS Nova.
Stuart J. Robbins and Rachael H. Hoover 2026 Planet. Sci. J. 7 164
A uniform analysis of crater catalogs finds that practically all computer-generated catalogs return worse metrics than manually generated catalogs, though most catalogs do well in some areas and poorly in others.
The post A Comparison of Lunar AI-Based Crater Databases Using Uniform Criteria appeared first on AAS Nova.
Cheongho Han et al 2026 ApJ 1004 183
Three newly characterized microlensing events augment the growing list of events involving binary sources and lenses, emphasizing the importance of testing models of this complexity.
The post Four-Body Gravitational Microlensing Events Involving Both a Binary Lens and a Binary Source appeared first on AAS Nova.
Cristobal Bordiu et al 2026 ApJL 1005 L34
Researchers have detected SO and SO2 for the first time in an early-type evolved star; these results suggest that B[e]supergiants could be useful for studying sulfur chemistry under extreme radiation conditions.
The post Discovery of Sulfur Oxides in the Ejecta of a B[e] Supergiant appeared first on AAS Nova.
Jamie Dietrich et al 2026 AJ 172 35
Some systems in the Habitable Worlds Observatory (HWO) Exoplanet Exploration Program (ExEP) Mission Star List have more than a 50% chance of hosting a temperate terrestrial exoplanet.
The post Predictive Rankings of the Probability of Hosting a Temperate Terrestrial World for the HWO ExEP Mission Star List appeared first on AAS Nova.
Junwei Zhao et al 2026 ApJ 1004 175
More than half of solar magnetic flux appears to emerge in three bands, two of which rotate faster than the Carrington rate; this finding suggests a connection between surface flux and interior dynamical processes.
The post Long-Term Clustering Pattern of Solar Active Regions and Their Potential Connection with Magneto-Rossby Waves appeared first on AAS Nova.
Zhecheng Hu et al 2026 ApJS 284 70
Researchers have identified six new candidate circumbinary disk systems, potentially greatly increasing the number of known systems of this type; these system exhibit deep and prolonged dimming episodes.
The post Six New Circumbinary Disk Occultation Candidates from the Zwicky Transient Facility appeared first on AAS Nova.
Yapeng Zhang et al 2026 ApJL 1005 L29
Ultra-hot Jupiter KELT-9b possesses an outflow with a mass-loss rate above 1013 g s-1 — one of the highest mass-loss rates measured for a gaseous exoplanet — and a diagnostic hydrogen Balmer line from its dayside.
The post Hydrogen Airglow from an Escaping Ultrahot Jupiter Atmosphere appeared first on AAS Nova.
Asad Ukani et al 2026 ApJ 1004 171
Modeling of the Milky Way’s circumnuclear disk of molecular gas suggests that the gas is distributed in a disk with inner and outer radii of 1.0 and 2.9 parsecs and an inclination of 60 degrees.
The post Modeling the Milky Way Circumnuclear Disk: Rosettes and Rings appeared first on AAS Nova.
Michelle L. Hill et al 2026 Planet. Sci. J. 7 140
Planets with radii 20% or possibly 30% smaller than Earth’s radius can maintain atmospheres, with initial carbon content, core radius fraction, initial mantle temperature, and other factors playing a role.
The post Smaller Than Earth Habitability Model (STEHM): The Lower Size Limit for Atmosphere Retention in the Habitable Zone appeared first on AAS Nova.
Aneesh Baburaj et al 2026 AJ 172 28
New observations of the coldest directly imaged planetary-mass companion of the pre-JWST era show a potential planetary formation pathway for the 25.2-Jupiter-mass object.
The post JWST-TST High Contrast: First Direct Spectroscopy of GJ 504 b Reveals Clouds and Possible Metal Enrichment appeared first on AAS Nova.
Itai Sfaradi et al 2026 ApJL 1005 L19
Recent radio rebrightening of a supernova observed in 2012 suggests that either the progenitor star experienced a past change in mass-loss rate or wind speed, or there is an off-axis relativistic jet present.
The post A 14-Yr-Old Mystery: The Peculiar Case of the Engine-Driven SN 2012ap appeared first on AAS Nova.
Ádám Mátéfy et al 2026 ApJ 1004 142
Gaia21bja is a young stellar object that brightens by up to 1.7 magnitudes during its outbursts, with its luminosity and mass-accretion rate increasing by a factor of 5.5–6 during the bursts.
The post Gaia21bja: Pre-Main-Sequence Star with Quasiperiodic Bursts appeared first on AAS Nova.
Yunshi Zeng et al 2026 ApJS 284 63
Using more than 50,000 images of coronal mass ejections, researchers have developed a novel machine-learning classification framework applicable to coronal mass ejections.
The post Automatic Detection and Segmentation of Coronal Mass Ejections in LASCO C3 Images appeared first on AAS Nova.
Sandeep Kumar et al 2026 ApJ 1006 26
By combining ground-based and space-based solar observations, researchers found that solar minimum solar wind predictions require higher source-surface heights than solar maximum predictions.
The post Source Surface Height Optimization for Improved Solar Wind Velocity Forecasting Across Solar Cycles 23, 24, and 25 appeared first on AAS Nova.
Yejing Zhan et al 2026 ApJL 1004 L46
The combination of gravitational wave emission, magnetic dissipation, and tidal interactions should cause the beat clock period of the CHIME/ILT J1634+44 system to change by tens of seconds per year.
The post A Falsifiable Timing Test for the Double-White-Dwarf Model of Long-Period Transients appeared first on AAS Nova.
The Hayabusa2 spacecraft could be rerouted to collide with asteroid 2024 YR4 and impart a velocity change of a few centimeters per second (though thankfully, such an intervention is not necessary!).
The post Feasibility Analysis of a Hypothetical Kinetic-Impact Deflection of 2024 YR4 Using In-Space Hayabusa2 for Earth-Impact Risk Reduction appeared first on AAS Nova.
New millimeter-wavelength observations reveal four new outflow lobes in addition to a previously known central bipolar jet; the new lobes have chains of knots, which are a sign of episodic ejection.
The post ALMA-QUARKS View of W49N: Multipolar Episodic Outflow Associated with the Most Energetic Galactic Water Maser appeared first on AAS Nova.
New constraints on the mass of V1674 Herculis from X-ray observations place the white dwarf around 1.09 solar masses, well below the near-Chandrasekhar mass proposed in previous works.
The post X-Ray Spectroscopy Mass Constraints on V1674 Her: The Fastest Nova Does Not have a Near-Chandrasekhar White Dwarf appeared first on AAS Nova.
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