Results 101 to 110 of about 64,299 (208)

Thermodynamics of Giant Molecular Clouds: The Effects of Dust Grain Size

The Astrophysical Journal
The dust grain size distribution (GSD) likely varies significantly across star-forming environments in the Universe, but its impact on star formation remains unclear. This ambiguity arises because the GSD interacts nonlinearly with processes like heating,
Nadine H. Soliman, Philip F. Hopkins, Michael Y. Grudić   +2 more
doaj   +1 more source

Imprints of the Local Bubble and Dust Complexity on Polarized Dust Emission

The Astrophysical Journal
Using 3D dust maps and Planck polarized dust emission data, we investigate the influence of the 3D geometry of the nearby interstellar medium (ISM) on the statistics of the dust polarization on large ( $80^{\prime} $ ) scales.
George Halal, S. E. Clark, Mehrnoosh Tahani   +2 more
doaj   +1 more source

Mechanical Torque Disruption of Dust Grains Induced by Supernova Shock Waves

The Astrophysical Journal
The feedback from massive stars drives the evolution of interstellar dust grains by altering their physical properties via a number of radiative and mechanical processes.
Sergio Martínez-González
doaj   +1 more source

A Power Spectral Study of PHANGS Galaxies with JWST MIRI: On the Spatial Scales of Dust and Polycyclic Aromatic Hydrocarbons

The Astrophysical Journal
The interstellar medium (ISM) consists of a diversity of structures across a range of spatial scales, intimately tied to galactic evolution. In this work, Fourier analysis is used to characterize the spatial structures of dust and polycyclic aromatic ...
Charlie Lind-Thomsen, Albert Sneppen, Charles L. Steinhardt   +2 more
doaj   +1 more source

Lifetimes of interstellar dust from cosmic ray exposure ages of presolar silicon carbide. [PDF]

Proc Natl Acad Sci U S A, 2020
Heck PR, Greer J, Kööp L, Trappitsch R, Gyngard F, Busemann H, Maden C, Ávila JN, Davis AM, Wieler R.   +9 more
europepmc   +1 more source

Contactless Manipulation and Raman Analysis of Cometary Analogs and Micrometeorites by Acoustic Levitation

The Astrophysical Journal
Extraterrestrial material collected during space missions is highly exposed to contamination issues during on-Earth analysis. Although high-protection-level protocols were developed, to minimize the contamination due to sample manipulation and the ...
S. Ferretti, S. Marrara, D. Bronte Ciriza, A. Magazzù, A. Foti, P. G. Gucciardi, A. Musolino, L. Folco, V. Della Corte, A. Rotundi, R. Saija, A. Mandanici, O. M. Maragò, M. G. Donato   +13 more
doaj   +1 more source

Interstellar polarization - Magnetite dust

The Astrophysical Journal, 1975
The polarization and extinction properties of magnetite, or Fe$sub 3$O$sub 4$, dust grains are calculated based on indirect evidence that magnetite grains might be the interstellar polarizers. The extinction and phase-lag cross sections of magnetite grains are calculated using a computer method for nonspherical grains.
openaire   +1 more source

Dust-extinction-curve Variation in the Translucent Interstellar Medium Is Driven by Polycyclic Aromatic Hydrocarbon Growth

The Astrophysical Journal Letters
The first all-sky, high-resolution, 3D map of the optical extinction curve of the Milky Way revealed an unexpected steepening of the extinction curve in the moderate-density, “translucent” interstellar medium (ISM).
Xiangyu Zhang, Brandon S. Hensley, Gregory M. Green   +2 more
doaj   +1 more source

The determination of cloud masses and dust characteristics from submillimetre thermal emission [PDF]

The principles by which the dust and masses and total masses of interstellar clouds and certain characteristics of interstellar dust grains can be derived from observations of far infrared and submillimeter thermal emission are reviewed.
Hildebrand, R. H.
core   +1 more source

Extreme Starlight Polarization Efficiency toward ζ Ophiuchi: A Case for Line-of-sight Foreground Subtraction

The Astronomical Journal
Despite the pervasive nature of interstellar dust and its impact on nearly all observations, most dust corrections employ line-of-sight averages over large angular scales.
Jordan A. Bartlett, Henry A. Kobulnicky
doaj   +1 more source