Results 71 to 80 of about 30,446 (206)

Interstellar polarization and grain alignment: the role of iron and silicon

, 2012
We compiled the polarimetric data for a sample of lines of sight with known abundances of Mg, Si, and Fe. We correlated the degree of interstellar polarization $P$ and polarization efficiency (the ratio of $P$ to the colour excess $E(B-V)$ or extinction $
Abbas, Andersson, Andersson, Andersson, Andersson, Asplund, Belley, Das, Davis, Djouadi, Draine, Draine, Duley, Efimov, Elias, Fitzpatrick, Ghosh, H. K. Das, Harries, Heiles, Il’in, Jones, Kim, Kimura, Kimura, Kocifaj, Krauß, Larson, Lazarian, Lazarian, Leroy, M. S. Prokopjeva, Marraco, Martin, Mathis, Matsumura, McDavid, Michel, Min, Molster, N. V. Voshchinnikov, Niyogi, Oudmaijer, Patriarchi, Poeckert, Purcell, Roche, Serkowski, Sorrell, Sorrell, Sturm, Th. Henning, Valencic, van Breemen, Vega, Vink, Voshchinnikov, Voshchinnikov, Voshchinnikov, Voshchinnikov, Wegner, Wegner, Weingartner, Weitenbeck, Whittet, Whittet   +65 more
core   +1 more source

Active Metasurfaces for Non‐Rigid Light Sail Interstellar Optical Communication

Advanced Theory and Simulations, Volume 7, Issue 1, January 2024.
Non‐rigidity of the nanophotonic light sail deformation that leads to varying angles of incidence and polarization across the aperture, significantly impacting unit cells' performance. It proposes a reflective all‐dielectric, low‐power active metasurface that dynamically counteracts the deformations in the shape of the light sail caused by the non ...
Mohammadrasoul Taghavi, Raana Sabri, Hossein Mosallaei   +2 more
wiley   +1 more source

The Chocolate Chip Cookie Model: Dust-to-metal Ratio of H ii Regions

The Astrophysical Journal Letters, 2023
Using a sample of face-on star-forming galaxies selected from the Sloan Digital Sky Survey, we statistically derive the typical optical depth τ _cl of individual H ii regions based on the “Chocolate Chip Cookie” model of Lu et al. (2022).
Jiafeng Lu, Shiyin Shen, Fang-Ting Yuan, Qi Zeng   +3 more
doaj   +1 more source

Extinction Curves, Distances, and Clumpiness of Diffuse Interstellar Dust Clouds

The Astronomical Journal, 1999
22 pages, 13 figures (postscript, gif, jpg). Accepted for publication in the Astronomical Journal, scheduled for the May 1999 issue. Full resolution postscript versions of all figures are available at http://www.ucolick.org/~arpad/
Szomoru, Arpad, Guhathakurta, Puragra
openaire   +2 more sources

Extinction Law at a Distance up to 25 kpc toward the Galactic Poles

, 2016
Photometry from the Tycho-2, 2MASS, and WISE catalogues for clump and branch giants at a distance up to 25 kpc toward the Galactic poles has allowed the variations of various characteristics of the infrared interstellar extinction law with distance to be
Gontcharov, George
core   +1 more source

Interstellar extinction at high Galactic latitudes across the whole dust layer in the Galaxy

ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021, 2022
By use of various methods we estimate interstellar extinction at high Galactic latitudes across the whole dust layer inthe Galaxy in a variety of photometric filters. First, we compare reddening estimates from the 3D map of Green-2019(i) inside and (ii) around 23 Galactic globular clusters, i.e.
P. Usachev, A. Smirnov, S. Savchenko, A. Marchuk, V. Il’in, A. Mosenkov, G. Gontcharov   +6 more
openaire   +1 more source

Dusting off the diffuse interstellar bands: DIBs and dust in extragalactic SDSS spectra

, 2014
Using over a million and a half extragalactic spectra we study the properties of the mysterious Diffuse Interstellar Bands (DIBs) in the Milky Way. These data provide us with an unprecedented sampling of the skies at high Galactic-latitude and low dust ...
Baron, Dalya, Poznanski, Dovi, Prochaska, J. Xavier, Watson, Darach, Yao, Yushu   +4 more
core   +1 more source

Luminosity Distance and Extinction by Submicrometer-sized Grains

The Astrophysical Journal Letters
The distance to the stars is a fundamental parameter, which is determined via two primary methods—parallax and luminosity. While the parallax is a direct trigonometric method, the luminosity distance is usually influenced by interstellar extinction.
R. Siebenmorgen, Frank Heymann, R. Chini
doaj   +1 more source

Dust properties along anomalous extinction sightlines. II. Studying extinction curves with dust models

, 2010
The large majority of extinction sight lines in our Galaxy obey a simple relation depending on one parameter, the total-to-selective extinction coefficient, Rv.
Barbaro, Barbaro, Barlow, Bohlin, Cardelli, Cardelli, Carnochan, Clayton, Clayton, Cowie, Draine, Draine, Draine, Esipov, Fitzpatrick, Fitzpatrick, Fitzpatrick, Fitzpatrick, Fresneau, G. Barbaro, Geminale, Georgelin, Gordon, Jenniskens, Jones, Jones, Li, Li, Li, Liu, Mathis, Mathis, Mattioda, Mazzei, Meyer, P. Mazzei, Papaj, Points, Qin, Reed, Savage, Straižys, Urquhart, Valencic, van Dishoeck, Wakker, Wakker, Wegner, Wegner, Weingartner, Wesselius, Wu, Wu, Zubko   +53 more
core   +1 more source

The Optical Extinction Law Depends on Magnetic Field Orientation: The RV–ψ Relation

The Astrophysical Journal
For aspherical interstellar dust grains aligned with their short axes preferentially parallel to the local magnetic field, the amount of extinction per grain is larger when the magnetic field is along the line of sight and smaller when in the plane of ...
Brandon S. Hensley
doaj   +1 more source