Results 131 to 140 of about 13,144 (210)

Subtle and Spectacular: Diverse White Dwarf Debris Disks Revealed by JWST

The Astrophysical Journal Letters
This Letter reports 12 novel spectroscopic detections of warm circumstellar dust orbiting polluted white dwarfs using the JWST Mid-Infrared Instrument (MIRI). The disks span 2 orders of magnitude in fractional infrared brightness and more than double the
J. Farihi, K. Y. L. Su, C. Melis, S. J. Kenyon, A. Swan, S. Redfield, M. C. Wyatt, J. H. Debes   +7 more
doaj   +1 more source

Confined Circumstellar Material as a Dust Formation Site in Type II Supernovae

The Astrophysical Journal
We propose a model for dust formation in Type II supernovae (SNe) interacting with confined circumstellar material (CSM), motivated by recent time-domain surveys that have revealed a substantial fraction of SN progenitors to be surrounded by CSM ejected ...
Yuki Takei, Kunihito Ioka, Masaru Shibata   +2 more
doaj   +1 more source

Dust dynamics in planet-forming discs in binary systems. [PDF]

Eur Phys J Plus, 2023
Zagaria F, Rosotti GP, Alexander RD, Clarke CJ.   +3 more
europepmc   +1 more source

Turbulent Infall onto Class 0 Disks as the Cause of the Brief CAI Condensation Episode in the Solar System

The Astrophysical Journal
Calcium-aluminum-rich inclusions (CAIs) in carbonaceous chondritic meteorites are the oldest relics in the solar system. Notably, their radiogenic ages indicate a brief (100 kyr) condensation episode.
Jiachen Zheng, Xing Wei, Hongping Deng, Wenrui Xu, Douglas N. C. Lin   +4 more
doaj   +1 more source

Polarimetric Models of Circumstellar Discs Including Aggregate Dust Grains

, 2016
The work conducted in this thesis examines the nature of circumstellar discs by investigating irradiance and polarization of scattered light. Two circumstellar discs are investigated. Firstly, H-band high contrast imaging data on the transitional disc of the Herbig Ae/Be star HD169142 are presented.
openaire   +2 more sources

Observing dust grain growth andsedimentation in circumstellar discs [PDF]

, 2011
In the present thesis, the observational effects of dust grain growth and sedimentation in circumstellar discs are investigated. The growth of dust grains from some nanometres in diameter as found in the inter- stellar medium towards planetesimal bodies some meters in diameter is an important step in the formation of planets.
openaire  

Unconventional gas-phase preparation of the prototype polycyclic aromatic hydrocarbon naphthalene (C₁₀H₈) via the reaction of benzyl (C₇H₇) and propargyl (C₃H₃) radicals coupled with hydrogen-atom assisted isomerization. [PDF]

Chem Sci, 2023
He C, Kaiser RI, Lu W, Ahmed M, Krasnoukhov VS, Pivovarov PS, Zagidullin MV, Azyazov VN, Morozov AN, Mebel AM.   +9 more
europepmc   +1 more source

Crystallization of stardust analogs under an electron flux atmosphere. [PDF]

PNAS Nexus
Shohan RA, Cly C, Speck A, Sargent B, Nuth JA, Whittington A, Ponce A.   +6 more
europepmc   +1 more source

Observations of Exocomets. [PDF]

Space Sci Rev
Korth J, Norazman A, Bendahan-West R, Kennedy G, Madurga Favieres C, Iglesias D, Shubina O, Xu S, Roth NX.   +8 more
europepmc   +1 more source

Gas-phase synthesis of the bicyclic silicon tricarbide molecule (c-SiC₃) as a precursor to silicon carbide nanoparticles in space. [PDF]

Chem Sci
Goettl SJ, Fujioka K, Alves MO, Silva MX, Yang Z, Metya S, Medvedkov IA, Sattasathuchana T, Galvão BRL, Sun R, Kaiser RI.   +10 more
europepmc   +1 more source