Results 101 to 110 of about 394,629 (288)
Oued Chebeika 002: A new CI1 meteorite linked to outer solar system bodies
Abstract CI1 chondrites are rare meteorites with high scientific value. In fact, they are the most chemically primitive meteorites and show evidence of intense parent‐body aqueous alteration. They also share strong similarities with samples from Ryugu and Bennu asteroids returned by the JAXA Hayabusa2 and NASA's OSIRIS‐REx missions.
J. Gattacceca+26 more
wiley +1 more source
Dust in protoplanetary disks: observations [PDF]
Solid particles, usually referred to as dust, are a crucial component of interstellar matter and of planet forming disks surrounding young stars. Despite the relatively small mass fraction of ≈1% (in the solar neighborhood of our galaxy; this number may differ substantially in other galaxies) that interstellar grains represent of the total mass budget ...
L.B.F.M. Waters, L.B.F.M. Waters
openaire +3 more sources
Uncertainties in water chemistry in disks: An application to TW Hya [PDF]
Context. This paper discusses the sensitivity of water lines to chemical processes and radiative transfer for the protoplanetary disk around TW Hya. The study focuses on the Herschel spectral range in the context of new line detections with the PACS ...
Aresu, G.+9 more
core +6 more sources
Abstract We report the discovery of (Al,Cu)‐bearing metallic alloys in two micrometeorites found in the Project Stardust collection gathered from urban rooftop environments in Norway. Most of the alloys are the same as those found in the Khatyrka meteorite and other micrometeorites, though one has a composition that has not been reported previously ...
Luca Bindi+9 more
wiley +1 more source
Protoplanetary Disk Masses from Radiative Transfer Modeling: A Case Study in Taurus [PDF]
Measuring the masses of protoplanetary disks is crucial for understanding their planet-forming potential. Typically, dust masses are derived from (sub-)millimeter flux density measurements plus assumptions for the opacity, temperature, and optical depth ...
N. Ballering, J. Eisner
semanticscholar +1 more source
An overview of the petrography and petrology of particles from aggregate sample from asteroid Bennu
Abstract The OSIRIS‐REx mission returned a sample of regolith from the carbonaceous asteroid Bennu in September 2023. We present preliminary in situ investigations of the petrology and petrography of selected particles ranging in size from 0.5 to 3 mm.
Harold C. Connolly Jr+57 more
wiley +1 more source
Close binary systems present challenges to planet formation. As binary separations decrease, so do the occurrence rates of protoplanetary disks in young systems and planets in mature systems.
Benjamin M. Tofflemire+10 more
doaj +1 more source
eddy: Extracting Protoplanetary Disk Dynamics with Python
eddy is a Python package which implements several methods for extracting kinematical information from astronomical observations of Doppler shifted molecular line emission in protoplanetary disks, the birthplace of planets.
R. Teague
semanticscholar +1 more source
Abstract The in‐plane rotation method is used to obtain X‐ray random diffraction (XRD) patterns of polished thin sections of 10 CM chondrites. The samples include five intermediately altered CM chondrites with subtypes 2.6–2.3, two heavily altered CM chondrites with subtype 2.0 and three with secondary heating after hydration (Y 980036, Y 980051, and ...
Naoya Imae+2 more
wiley +1 more source
PROTOPLANETARY DISK STRUCTURES IN OPHIUCHUS [PDF]
ApJ in press: 51 pages, 13 ...
Sean M. Andrews+4 more
openaire +3 more sources