Results 61 to 70 of about 73,704 (164)
Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 341-367, June 2026.Key Points We recommend using the notation δ122/118SnNIST SRM 3161a for mass‐dependent Sn isotope data. We derived conversion factors relative to NIST SRM 3161a for Puri Sn CEZA (0.132 ± 0.011‰), Sn Lyon (0.229 ± 0.016‰), Sn IPGP (0.162 ± 0.018‰). Tin isotope compositions are presented for SPEX CertiPrep Sn and nine USGS reference materials.
Aurélia C.E. Meister +10 more
wiley +1 more source
The protoplanetary disks – some examples [PDF]
, 2009 Protoplanetary disks have been observed around several young stars.
Biała, Jadwiga
core
Puffed-up Inner Rings and Razor-thin Outer Rings in Structured Protoplanetary Disks
The Astrophysical JournalThe vertical distribution of pebbles in protoplanetary disks is a fundamental property influencing planet formation, from dust aggregation to the assembly of planetary cores.
Haochang Jiang +10 more
doaj +1 more source
Anhydrous minerals in asteroid Bennu: Evidence for well‐preserved primordial components
Meteoritics &Planetary Science, Volume 61, Issue 6, Page 963-986, June 2026.Abstract Aqueously altered carbonaceous astromaterials are dominated by secondary minerals, but a minor fraction of primary, anhydrous silicates and oxides escape alteration, offering insight into the original composition of asteroid parent bodies. We report the mineralogy, petrology, mineral chemistry, and oxygen isotopes of anhydrous minerals—50 ...
S. S. Russell +23 more
wiley +1 more source
Spirals in protoplanetary disks [PDF]
, 2016 Review on the different processes able to launch spiral arms in protoplanetary disks: gravitational instabilities, planet-disk interaction, shadows, stellar fly ...
Christiaens, Valentin
core
Protoplanetary Disk Polarization at Multiple Wavelengths: Are Dust Populations Diverse?
The Astrophysical JournalMillimeter and submillimeter observations of continuum linear dust polarization provide insight into dust grain growth in protoplanetary disks, which are the progenitors of planetary systems.
Rachel E. Harrison +6 more
doaj +1 more source
Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model
Systems Research and Behavioral Science, Volume 43, Issue 3, Page 1212-1228, May/June 2026.ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley +1 more source
Molecular Hydrogen Emission from Protoplanetary Disks [PDF]
, 2005 We have modeled self-consistently the density and temperature profiles of gas and dust in protoplanetary disks, taking into account irradiation from a central star.
H. Nomura +3 more
core +1 more source
The Astrophysical JournalThe inward drift of millimeter–centimeter sized pebbles in protoplanetary disks has become an important part of our current theories of planet formation and, more recently, planet composition as well.
Leon Trapman +18 more
doaj +1 more source
CI chondrite Oued Chebeika 002 links asteroids Bennu and Ryugu to common parent body
Meteoritics &Planetary Science, Volume 61, Issue 5, Page 801-818, May 2026.Abstract CI chondrites are a compositionally primitive group of meteorites that have undergone extensive aqueous alteration, providing insights into the evolution of primitive planetesimals. Oued Chebeika 002 is the most pristine CI chondrite to date.
Megan Broussard +11 more
wiley +1 more source