Results 91 to 100 of about 36,246 (179)
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract Mars Reconnaissance Orbiter's Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), Context Imager (CTX), and High Resolution Imaging Science Experiment observations were analyzed for a 25‐m‐wide impact crater and associated ejecta deposits located in the dust‐covered Arabia Terra region.
R. E. Arvidson +13 more
wiley +1 more source
Leaky Dust Traps in Planet-embedded Protoplanetary Disks
The Astrophysical JournalFrom the survival of dust disks for a few Myr to the establishment of chemical dichotomy, dust traps are expected to play a pivotal role in sculpting protoplanetary disks and the early planet formation process.
Pinghui Huang +4 more
doaj +1 more source
Aspect Asymmetry in Martian Gullies: A Topographic Signature of Their Formation Process?
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract On Mars, erosional‐depositional landforms named gullies provide natural experiments for studying the topographic signature of the processes that act on hillslope evolution. High‐resolution topographic data were used to quantitatively compare the steepness of opposing walls in gully alcoves incised into ice‐rich slopeside mantling deposits.
A. Noblet, G. R. Osinski, S. J. Conway
wiley +1 more source
The Astrophysical JournalJWST has enabled the detection of the ultraviolet (UV) continuum of galaxies at z > 10, revealing extremely blue, potentially dust-free galaxies. However, interpreting UV spectra is complicated by the well-known degeneracy between stellar ages, dust ...
Desika Narayanan +10 more
doaj +1 more source
The Search for Celestial Positronium via the Recombination Spectrum
, 2009 Positronium is the short-lived atom consisting of a bound electron-positron pair. In the triplet state, when the spins of both particles are parallel, radiative recombination lines will be emitted prior to annihilation.
Bland-Hawthorn, J., Ellis, S. C.
core +1 more source
Shoulder of Dust Rings Formed by Planet–Disk Interactions
The Astrophysical JournalRecent analyses of millimeter-wavelength protoplanetary disk observations have revealed several emission excesses on the previously identified dust rings, referred to as dust shoulders.
Jiaqing Bi, Min-Kai Lin
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Distances to Recent Near-Earth Supernovae from Geological and Lunar 60Fe
The Astrophysical JournalNear-Earth supernova blasts which engulf the solar system have left traces of their ejecta in the geological and lunar records. There is now a wealth of data on live radioactive ^60 Fe pointing to a supernova at 3 Myr ago, as well as the recent discovery
Adrienne F. Ertel, Brian D. Fields
doaj +1 more source
Inside-out Planet Formation. VIII. Onset of Planet Formation and the Transition Disk Phase
The Astrophysical JournalInside-out planet formation (IOPF) is a theory of in situ formation via pebble accretion of close-in Earth to super-Earth mass planets at the pressure maximum associated with the dead zone inner boundary (DZIB), whose location is set initially by thermal
Xiao Hu, Jonathan C. Tan
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Mechanical Torque Disruption of Dust Grains Induced by Supernova Shock Waves
The Astrophysical JournalThe feedback from massive stars drives the evolution of interstellar dust grains by altering their physical properties via a number of radiative and mechanical processes.
Sergio Martínez-González
doaj +1 more source
The Astrophysical JournalPolycyclic aromatic hydrocarbons (PAHs) are commonly used as proxies for star formation, molecular gas content, and other interstellar medium (ISM) properties in our Galaxy and other galaxies.
Enrique Lopez-Rodriguez
doaj +1 more source