Results 61 to 70 of about 516 (169)

Interstellar extinction toward the CAS OB6 association: Where is the dust?

The Astronomical Journal, 1993
We have completed a multiband (ultraviolet, optical, and near-infrared) study of the interstellar extinction properties of nine massive stars in IC 1805 and IC 1848, which are both part of Cas OB6 in the Perseus spiral arm. Our analysis includes determination of absolute extinction over the wavelength range from 3 micrometers to 1250 A.
Margaret Murray Hanson, Geoffrey C. Clayton   +1 more
openaire   +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

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

An Empirical Extinction Curve Revealed by Gaia XP Spectra and LAMOST

The Astrophysical Journal
We present a direct measurement of extinction curves using corrected Gaia XP spectra of the common sources in Gaia DR3 and LAMOST DR7. Our analysis of approximately 370,000 high-quality samples yielded a high-precision average extinction curve for the ...
Ruoyi Zhang, Haibo Yuan, Bowen Huang, Tao Wang, Lin Yang, Gregory M. Green, Xiangyu Zhang   +6 more
doaj   +1 more source

INTERSTELLAR EXTINCTION MODELLING BY AGGREGATE DUST

International Journal of Advanced Research
Extinction generally ours whenever electromagnetic radiation propagates through a medium containing small particles. The spectral dependence of extinction, or extinction curve, is a function of the composition, structure and size distribution of the particles.
openaire   +1 more source

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

Foreground Dust Properties toward the Cluster NGC 7380

The Astronomical Journal
Using starlight polarization, we present the properties of foreground dust toward cluster NGC 7380 embedded in H ii region Sh 2-142. Observations of starlight polarization are carried out in four filters using an imaging polarimeter equipped with a 104 ...
Sadhana Singh, Jeewan C. Pandey, Thiem Hoang, Neelam Panwar, Biman J. Medhi, Vishal Joshi, Shashikiran Ganesh   +6 more
doaj   +1 more source

On the Interstellar Extinction Curve toward HD 93222, a Sight Line with an Exceedingly Narrow 2175 Å Extinction Bump

The Astrophysical Journal
The 2175 Å extinction bump, the most prominent spectral feature superimposed on the interstellar extinction curve, is widely seen in the interstellar medium of the Milky Way and external galaxies, both near and far.
Qian Wang, Aigen Li, X. J. Yang
doaj   +1 more source

Correlations between Dust Extinction Features across All Wavelength Scales: From Diffuse Interstellar Bands to R(V)

The Astrophysical Journal
Understanding variations in the dust extinction curve is imperative for using dust as a tracer of local structure in the interstellar medium, understanding dust chemistry, and performing extinction corrections.
Andrew K. Saydjari, Gregory M. Green
doaj   +1 more source