Results 11 to 20 of about 13,043 (174)
Dust Coagulation in Oxygen-rich Circumstellar Outflows
The Astrophysical Journal, 2023 We show that the inefficient growth of SiO molecules on (SiO) _x dust grains prolongs the period of maximum dust nucleation in circumstellar outflows resulting in a several orders-of-magnitude increase in the dust density near the star.
John A. Paquette +2 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 Astronomical observations of the polarized intensity of scattered visible light have revealed the presence of dust envelopes around different types of evolved stars.
Juan Carlos Gómez Martín +10 more
doaj +1 more source
Visible to Mid‐Infrared Optical Constants of Orthopyroxenes
Earth and Space Science, Volume 9, Issue 4, April 2022., 2022 Abstract Radiative transfer models of remotely acquired infrared spectra result in quantitative identification of minerals on planetary surfaces. Optical constants, or the real (n) and imaginary (k) indices of refraction are necessary inputs in such models.
Melinda J. Rucks +5 more
wiley +1 more source
Dust Around T Tauri Stars [PDF]
Journal of Astronomy and Space Sciences, 2011 To reproduce the multiple broad peaks and the fine spectral features in the spectral energy distributions (SEDs) of T Tauri stars, we model dust around T Tauri stars using a radiative transfer model for multiple isothermal circumstellar dust shells. We
Kyung-Won Suh, Young-Joo Kwon
doaj +1 more source
Structure and evolution of interstellar carbonaceous dust. Insights from the laboratory
Frontiers in Astronomy and Space Sciences, 2022 A large fraction of interstellar carbon is locked up in solid grains. The nature, origin and evolution of these grains have been investigated for decades.
Víctor J. Herrero +5 more
doaj +1 more source
Mid-infrared observations of young stellar objects in the vicinity of sigma Orionis [PDF]
, 2004 We present new mid-infrared observations of objects in the vicinity of the O-star sigma Orionis, obtained with TIMMI-2 at ESO. By constraining their near- and mid-infrared spectral energy distributions, we established the nature of previously known IRAS ...
Oliveira, Joana M., van Loon, Jacco Th.
core +6 more sources
Journal of Geophysical Research: Planets, Volume 126, Issue 2, February 2021., 2021 Abstract The earliest atmospheres of rocky planets originate from extensive volatile release during magma ocean epochs that occur during assembly of the planet. These establish the initial distribution of the major volatile elements between different chemical reservoirs that subsequently evolve via geological cycles.
Tim Lichtenberg +6 more
wiley +1 more source
The Origin of Dust Polarization in the Orion Bar
The Astrophysical Journal, 2023 The linear polarization of thermal dust emission provides a powerful tool to probe interstellar and circumstellar magnetic fields, because aspherical grains tend to align themselves with magnetic field lines.
Valentin J. M. Le Gouellec +10 more
doaj +1 more source
From Dust to Nanodust: Resolving Circumstellar Dust from the Colliding-wind Binary Wolf-Rayet 140
The Astrophysical Journal, 2023 Wolf-Rayet (WR) 140 is the archetypal periodic dust-forming colliding-wind binary that hosts a carbon-rich WR (WC) star and an O-star companion with an orbital period of 7.93 yr and an orbital eccentricity of 0.9.
Ryan M. Lau +19 more
doaj +1 more source
The New Class of Dusty DAZ White Dwarfs [PDF]
, 2007 Our mid-infrared survey of 124 white dwarfs with the Spitzer Space Telescope and the IRAC imager has revealed an infrared excess associated with the white dwarf WD 2115-560 naturally explained by circumstellar dust.
Fergal Mullally +7 more
core +3 more sources