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A Study of HH 270 with the James Webb Space Telescope
A. N. Ortiz Capeles et al 2026 ApJ 1003 65 Using data from JWST, the Subaru Telescope, and the Atacama Large Millimeter/submillimeter Array, researchers have identified a previously unseen collimated protostellar jet in a Herbig–Haro object. The post A Study of HH 270 with the James Webb Space Telescope appeared first on AAS Nova .
Chemical Fingerprints of Accreted Ultrafaint Dwarf Galaxies in the Milky Way Halo
Diala M. Taneenah et al 2026 ApJL 1003 L11 Researchers have discovered two chemically distinct populations in a sample of 97 metal-poor stars in the Milky Way halo, potentially providing a way to identify accreted halo stars. The post Chemical Fingerprints of Accreted Ultrafaint Dwarf Galaxies in the Milky Way Halo appeared first on AAS Nova .
Searching for Technosignatures in the Spectra of Polluted White Dwarfs
aasnova.org1d agoSearching for Technosignatures in the Spectra of Polluted White Dwarfs
AAS Nova1d agoRevisiting the Evidence for Double Sequences of Blue Straggler Stars in Globular Clusters
Gourav Kumawat et al 2026 AJ 171 306 Analysis of blue straggler stars in 56 Milky Way globular clusters finds no evidence for a bimodal distribution in color–magnitude space due to differing formation pathways. The post Revisiting the Evidence for Double Sequences of Blue Straggler Stars in Globular Clusters appeared first on AAS Nova .
When the Spacecraft Align: Rescuing Saturated Images of Solar Flares
When the Spacecraft Align: Rescuing Saturated Images of Solar Flares
Warped and Hooked: Mapping the Magellanic Clouds in Three Dimensions Using Red Clump Stars
Slater J. Oden et al 2026 ApJ 1003 9 By constructing a detailed distance map to the Magellanic Clouds, researchers have revealed substructures within this interacting galaxy pair, including an azimuthal warp in the Large Magellanic Cloud. The post Warped and Hooked: Mapping the Magellanic Clouds in Three Dimensions Using Red Clump Stars appeared first on AAS
Potential Interaction of 99942 Apophis with the High Earth Orbit Population During the 2029 Close Approach
Giulia Schettino and Alessandro Rossi 2026 Planet. Sci. J. 7 110 Though the asteroid Apophis will not collide with Earth in 2029, there is a slim but present possibility that it will strike an artificial object orbiting Earth, potentially compromising future missions to the asteroid. The post Potential Interaction of 99942 Apophis with the High Earth Orbit P
The First Systematic Survey of Stellar Halos in High-Inclination Galaxies Reveals Unusually Quiescent Merger Histories of Nearby Galaxies
Bojun Tao et al 2026 ApJS 284 31 Analysis of 93 stellar halos detected in a sample of 169 high-inclination galaxies showed that high-mass galaxies have more extended halos and more active merger histories, among other findings. The post The First Systematic Survey of Stellar Halos in High-Inclination Galaxies Reveals Unusually Quiescent Merger Histories of N
Featured Image: How Do You Solve a Problem like (Lunar) Maria?
Atmospheric Response for MeV γ Rays Observed with Balloon-Borne Detectors
Christopher M. Karwin et al 2024 ApJ 974 146 Scattering of photons in Earth’s atmosphere makes it challenging to assess balloon-borne gamma-ray observations, and modeling shows that scattering is especially impactful for lower energies. The post Atmospheric Response for MeV γ Rays Observed with Balloon-Borne Detectors appeared first on AAS Nova .
Slow Rotation for the Super-Puff Planet Kepler-51d
Caleb Lammers and Joshua N. Winn 2024 ApJL 977 L1 Using JWST transit observations, researchers have determined that a low-density “super-puff” exoplanet is rotating slower than expected based on certain theories of these planets’ origins. The post Slow Rotation for the Super-Puff Planet Kepler-51d appeared first on AAS Nova .
Exploring Unobscured Quasi-Stellar Objects in the Southern Hemisphere with KS4
Yongjung Kim et al 2024 ApJS 275 46 Nearly all — 99.6% — of the 72,964 unobscured quasar candidates in a new catalog of the southern sky have never been previously identified as such via spectroscopy. The post Exploring Unobscured Quasi-Stellar Objects in the Southern Hemisphere with KS4 appeared first on AAS Nova .
Echoes of a Tidal Disruption Event
The Discovery of Three Pulsars in the Globular Cluster M15 with FAST
Yuxiao Wu et al 2024 ApJL 974 L23 Exploring both ends of the pulsar spectrum, researchers have discovered a millisecond pulsar and two long-period pulsars, including the slowest-spinning pulsar discovered so far. The post The Discovery of Three Pulsars in the Globular Cluster M15 with FAST appeared first on AAS Nova .
Record-Breaking Pulsating White Dwarf Discovered
The Featherweight Giant: Unraveling the Atmosphere of a 17 Myr Planet with JWST
Pa Chia Thao et al 2024 AJ 168 297 A purported hot Jupiter gets rebranded as a low-density precursor to a sub-Neptune that may lose its atmospheric envelope entirely within a billion years. The post The Featherweight Giant: Unraveling the Atmosphere of a 17 Myr Planet with JWST appeared first on AAS Nova .
Observational Signatures of Dust Traffic Jams in Polar-Aligning Circumbinary Disks
Jeremy L. Smallwood et al 2024 ApJL 976 L23 Misaligned dusty disks around young binary stars can precess and eventually end up in a polar orbit; future radio arrays may be capable of detecting the centimeter-sized dust grains involved in the resulting “traffic jams.” The post Observational Signatures of Dust Traffic Jams in Polar-Aligning Circumbinary Disks
