Results 51 to 60 of about 88,907 (241)

Stellar evolution and modelling stars

open access: yes, 2017
In this chapter I give an overall description of the structure and evolution of stars of different masses, and review the main ingredients included in state-of-the-art calculations aiming at reproducing observational features.
A. Bressan   +84 more
core   +1 more source

Women Scientists Who Made Nuclear Astrophysics [PDF]

open access: yes, 2018
Female role models reduce the impact on women of stereotype threat, i.e., of being at risk of conforming to a negative stereotype about one's social, gender, or racial group [1,2].
Aliotta, Marialuisa   +26 more
core   +3 more sources

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska   +4 more
wiley   +1 more source

Porous dust grains in debris disks [PDF]

open access: yes, 2013
When modeling the density and grain size distribution in debris disks, the minimum particle size is often significantly larger than the corresponding blowout size.
Kirchschlager, Florian, Wolf, Sebastian
core   +1 more source

Description and modeling of the Jiddat al Harasis 091 L5 strewn field

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract With a size of 51.2 × 7.2 km, the 10.9 ± 1.7 ka old Jiddat al Harasis 091 L5 chondrite strewn field is the largest known in Oman. It consists of more than 700 meteorites with a total mass of >4.5 tons from which the largest six stones of >100 kg to 1.5 tons make up two thirds of the total mass.
Karl Wimmer   +5 more
wiley   +1 more source

Modeling enstatite chondrites: Reduced rocks with a pinch of oxidized material (affected by varying H2O(g)) derived from planetesimals shocked during the epoch of giant–planet migration

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The O‐, N‐, Mo‐, Ru‐, Os‐, Cr‐, Ti‐, Ni‐, Fe‐, Nd‐, Ca‐, Zn‐, Sr‐, and Mg‐isotopic compositions of enstatite chondrites are essentially identical to those of the Earth and Moon. These correspondences suggest enstatite chondrites formed at ≈1 AU as the only known chondrite groups that accreted in the vicinity of a major planet. Bulk Earth has a
Alan E. Rubin
wiley   +1 more source

NLTE modelling of integrated light spectra. Abundances of barium, magnesium, and manganese in a metal-poor globular cluster [PDF]

open access: yes, 2019
We study the effects of non-local thermodynamic equilibrium (NLTE) on the abundance analysis of barium, magnesium, and manganese from integrated light spectroscopy, as typically applied to the analysis of extra-galactic star clusters and galaxies.
Bergemann, Maria   +2 more
core   +2 more sources

Occurrence and characterization of nanosulfide‐rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Samples returned from asteroid Ryugu by the Hayabusa2 mission are dominated by fine‐grained matrix material made of phyllosilicates and nanosulfides. Here, we report the mineralogical, textural, and chemical characteristics of nanosulfide‐rich regions identified in Ryugu particles.
Roberto Conconi   +9 more
wiley   +1 more source

The rotation and Galactic kinematics of mid M dwarfs in the Solar Neighborhood

open access: yes, 2015
Rotation is a directly-observable stellar property, and drives magnetic field generation and activity through a magnetic dynamo. Main sequence stars with masses below approximately 0.35Msun (mid-to-late M dwarfs) are fully-convective, and are expected to
Berta-Thompson, Zachory K.   +5 more
core   +1 more source

Ultraviolet C (UV‐C) Light Therapy for Equine Ulcerative Keratomycosis—An In Vitro Study

open access: yesVeterinary Ophthalmology, EarlyView.
ABSTRACT Objectives To assess if an affordable, commercially available 275 nm ultraviolet C (UV‐C) device can inhibit fungal pathogens associated with equine keratomycosis and to establish the optimal exposure time/dose required in vitro. Methods Fungal inhibition zone surface areas of isolates from two fungal genera (Aspergillus and Fusarium spp ...
Mona Hoerdemann   +3 more
wiley   +1 more source

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