Results 121 to 130 of about 50,798 (260)

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

Interstellar Polarization Survey. III. Relation between Optical Polarization and Reddening in the General Interstellar Medium

The Astronomical Journal, 2023
Optical starlight can be partially polarized while propagating through the dusty, magnetized interstellar medium (ISM). The polarization efficiency describes the polarization intensity fraction per reddening unit, P _V / E ( B − V ), related to the ...
Y. Angarita, M. J. F. Versteeg, M. Haverkorn, C. V. Rodrigues, A. M. Magalhães, R. Santos-Lima, Koji S. Kawabata   +6 more
doaj   +1 more source

Dust in the Local Group

, 2015
How dust absorbs and scatters starlight as a function of wavelength (known as the interstellar extinction curve) is crucial for correcting for the effects of dust extinction in inferring the true luminosity and colors of reddened astrophysical objects ...
Gao, Jian, Jiang, B. W., Li, Aigen, Wang, Shu   +3 more
core   +1 more source

An All-sky 3D Dust Map Based on Gaia and LAMOST

The Astrophysical Journal Supplement Series
We present a comprehensive 3D dust-reddening map covering the entire Milky Way, constructed by combining reddening estimates based on Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) low-resolution spectra ( E ( B  −  V ) _LAMOST ) with ...
Tao Wang, Haibo Yuan, Bingqiu Chen, Maosheng Xiang, Ruoyi Zhang, Bowen Huang, Hongrui Gu, Shuaicong Wang, Jiawei Li   +8 more
doaj   +1 more source

Expanded Sample of Small Magellanic Cloud Ultraviolet Dust Extinction Curves: Correlations between the 2175 Å Bump, q PAH, Ultraviolet Extinction Shape, and N(H i)/A(V)

The Astrophysical Journal
The Small Magellanic Cloud (SMC) shows a large variation in ultraviolet (UV) dust extinction curves, ranging from Milky Way (MW) like to significantly steeper curves with no detectable 2175 Å bump.
Karl D. Gordon, E. L. Fitzpatrick, Derck Massa, Ralph Bohlin, Jérémy Chastenet, Claire E. Murray, Geoffrey C. Clayton, Daniel J. Lennon, Karl A. Misselt, Karin Sandstrom   +9 more
doaj   +1 more source

Circumstellar dust [PDF]

The presence of dust in the general interstellar medium is inferred from the extinction, polarization, and scattering of starlight; the presence of dark nebulae; interstellar depletions; the observed infrared emission around certain stars and various ...
Dwek, E.
core   +1 more source

CO Line Emission and Absorption from the HL Tau Disk: Where is all the dust?

, 2005
We present high-resolution infrared spectra of HL Tau, a heavily embedded young star. The spectra exhibit broad emission lines of hot CO gas as well as narrow absorption lines of cold CO gas. The column density for this cooler material (7.5+/-0.2 x 10^18
Carr J. S., Craig Kulesa, Monin J. L., Sean D. Brittain, Terrence W. Rettig, Theodore Simon, Whittet D. C. B., Whittet D. C. B.   +7 more
core   +1 more source

Absorption and scattering by interstellar dust in the silicon K-edge of GX 5-1 [PDF]

, 2016
Context. We study the absorption and scattering of X-ray radiation by interstellar dust particles, which allows us to access the physical and chemical properties of dust. The interstellar dust composition is not well understood, especially on the densest
S. Zeegers, E. Costantini, C. Vries, A. Tielens, H. Chihara, F. Groot, H. Mutschke, L. Waters, S. Sron, L. Observatory, O. University, Debye Institute for Nanomaterials Science, A. Jena, Uva, Naoj   +14 more
semanticscholar   +1 more source

Extinction by stratified interstellar dust grains

, 2010
We compute the optical properties of spherical dust grains composed of hollow silicate cores coated with two carbonaceous layers, the inner layer of mostly graphitic sp2 carbon and the outer layer of sp3 polymeric amorphous carbon, and explore the consequences on modelled interstellar extinction curves.
M. A. Iatì, 1, C. Cecchi Pestellini, CACCIOLA, ADRIANO, SAIJA, Rosalba, DENTI, Paolo, BORGHESE, Ferdinando   +6 more
openaire   +3 more sources

Extinction of Taurus, Orion, Perseus and California Molecular Clouds Based on the LAMOST, 2MASS, and Gaia Surveys. II. The Extinction Law

The Astronomical Journal
The extinction law from ultraviolet (UV) to infrared (IR; 0.2–24 μ m) is determined by relying on the blue-edge method and color-excess ratios for some nearby molecular clouds, from the low-mass star-forming region to the massive star-forming region. The
ZheTai Cao, Biwei Jiang, Shu Wang, Jun Li   +3 more
doaj   +1 more source