Results 71 to 80 of about 4,544 (213)
, 2014 A&A, 572, A72 (2014). 31 pages, 29 figures. (Final version)International audienceContext. Circumstellar disks are known to contain a significant mass in dust ranging from micron to centimeter size.
Guillot, Tristan +2 more
core +3 more sources
Size–Frequency Distribution of Terrestrial Leftover Planetesimals and S-complex Implanted Asteroids
The Astrophysical JournalThe isotopic composition of meteorites linked to S-complex asteroids has been used to suggest that these asteroids originated in the terrestrial planet’s region, i.e., within 1.5 au, and later got implanted into the main asteroid belt (MAB).
Rogerio Deienno +5 more
doaj +1 more source
Pebble formation by ice condensation
EPJ Web of Conferences, 2013 Pebbles with sizes of centimeters to decimeters are needed in order to form kilometer-sized planetesimals, which in turn are needed for planet formation to proceed. The well-studied mechanism of coagulation is efficient only up to millimeter-sized dust
Ros Katrin
doaj +1 more source
CONGLOMERATION OF KILOMETER-SIZED PLANETESIMALS [PDF]
The Astrophysical Journal, 2015 We study the efficiency of forming large bodies, starting from a sea of equal-sized planetesimals. This is likely one of the earlier steps of planet formation and relevant for the formation of the asteroid belt, the Kuiper belt and extra-solar debris disks.
Andrew Shannon +2 more
openaire +3 more sources
Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1875-1904, August 2026.Abstract Near‐Earth rubble‐pile asteroids Bennu and Ryugu are part of the carbonaceous taxonomic complex (C‐complex), and samples returned from both bodies resemble the most aqueously altered carbonaceous chondrites. However, telescopic and spacecraft visible–near infrared (VIS–NIR) reflectance spectra of Ryugu exhibit a red (positive) spectral slope ...
Ralph E. Milliken +10 more
wiley +1 more source
A close-encounter method for simulating the dynamics of planetesimals
, 2020 The dynamics of planetesimals plays an important role in planet formation because their velocity distribution sets the growth rate to larger bodies.
Lorek, Sebastian +3 more
core +2 more sources
The Influence of Cold Jupiters in the Formation of Close-in Planets. I. Planetesimal Transport
The Astrophysical Journal, 2023 The formation of a cold Jupiter (CJ) is expected to quench the influx of pebbles and the migration of cores interior to its orbit, thus limiting the efficiency of rocky planet formation either by pebble accretion and/or orbital migration.
Marcy Best +2 more
doaj +1 more source
Are Pebble Pile Planetesimals Doomed? [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 In parabolic flight experiments we studied the wind induced erosion of granular beds composed of spherical glass beads at low gravity and low ambient pressure. Varying g-levels were set by centrifugal forces. Expanding existing parameter sets to a pressure range between $p=300-1200\,$Pa and to g-levels of $g=1.1-2.2\,\rm m\,s^{-2}$ erosion thresholds ...
Tunahan Demirci +6 more
openaire +3 more sources
Mineralogy, mineral chemistry, and redox equilibria in ten aggregate particles from asteroid Bennu
Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1905-1927, August 2026.Abstract Examination of 10 Bennu aggregate particles has revealed the presence of many phases which taken together can provide constraints on the oxygen fugacity (fO2) of Bennu samples. Phyllosilicates (saponite and serpentine), carbonates, oxides (magnetite, chromite), sulfides (pyrrhotite, pentlandite), phosphate (hydroxyapatite, Na‐Mg‐phosphate ...
K. Righter +11 more
wiley +1 more source
Formation of the terrestrial planets from planetesimals [PDF]
, 1991 Formation of the terrestrial planets from planetesimals is discussed. The following subject areas are covered: (1) formation of the original planetesimals; (2) growth of planetesimals into planetary embryos; and (3) growth of runaway planetary embryos ...
Wetherill, George W.
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