Results 111 to 120 of about 30,446 (206)

Spatial Variations of Dust Opacity and Grain Growth in Dark Clouds: L1689, L1709, and L1712

The Astrophysical Journal
The far-infrared (FIR) opacity of dust in dark clouds within the Ophiuchus molecular cloud is investigated through multiwavelength infrared observations from UKIDSS, Spitzer, and Herschel.
Jun Li, Biwei Jiang, He Zhao, Xi Chen, Yang Yang   +4 more
doaj   +1 more source

Diverse reddening distributions in sight lines for type Ia supernovae

Astronomy & Astrophysics
Context. Accurate cosmological constraints from type Ia supernovae (SNe) require sufficiently accurate corrections for host-galaxy extinction. Modelling these corrections is challenged by the problem of disentangling the SN’s intrinsic colours from host ...
Hallgren Lucas, Wojtak Radosław, Hjorth Jens, Steinhardt Charles L.   +3 more
doaj   +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

Dust and Extinction Curves in Galaxies with z>0: The Interstellar Medium of Gravitational Lens Galaxies

, 1999
We determine 37 differential extinctions in 23 gravitational lens galaxies over the range 0 < z_l < 1. Only 7 of the 23 systems have spectral differences consistent with no differential extinction. The median differential extinction for the optically-selected (radio-selected) subsample is E(B-V)=0.04 (0.06) mag. The extinction is patchy and shows
Falco, E. E., Impey, C. D., Kochanek, C. S., Lehar, J., McLeod, B. A., Rix, H-W., Keeton, C. R., Munoz, J. A., Peng, C. Y.   +8 more
openaire   +2 more sources

A Catalog of Stellar and Dust Properties for 500,000 Stars in the Southwest Bar of the Small Magellanic Cloud

The Astrophysical Journal
We present a catalog of individual stellar and dust extinction properties along close to 500,000 sight lines in the southwest bar of the Small Magellanic Cloud (SMC). The catalog is based on multiband Hubble Space Telescope photometric data spanning near-
Petia Yanchulova Merica-Jones, Karl Gordon, Karin Sandstrom, Claire E. Murray, L. Clifton Johnson, Julianne J. Dalcanton, Julia Roman-Duval, Jeremy Chastenet, Benjamin F. Williams, Daniel R. Weisz, Andrew E. Dolphin   +10 more
doaj   +1 more source

Interstellar and cometary dust [PDF]

Aspects of interstellar dust which are known from direct observation will be discussed. Some specific difficulties that various theories have in explaining the observations will be presented.
Mathis, John S.
core   +1 more source

Estimating Dust Attenuation from Galactic Spectra. III. Radial Variations of Dust Attenuation Scaling Relations in MaNGA Galaxies

The Astrophysical Journal
We investigate the radial dependence of the scaling relations of dust attenuation in nearby galaxies using integral field spectroscopy data from MaNGA.
Niu Li, Cheng Li
doaj   +1 more source

Interstellar matter in elliptical galaxies - III. Properties of dust extinction [PDF]

Monthly Notices of the Royal Astronomical Society, 1994
Goudfrooy, P., de Jong, T., Hansen, L., Norgaard-Nielsen, H.U.   +3 more
openaire   +3 more sources

The Spheroidal Analog Method for Modeling Irregular Porous Aggregates

The Astrophysical Journal
It is shown that the optical properties of an irregular porous grain with effective radius a _eff  ≲ 3 λ (where λ is the wavelength) can be well approximated by a “spheroidal analog”: a spheroid with appropriate axial ratio and size, with a dielectric ...
B. T. Draine
doaj   +1 more source

The Dust Extinction Curve: Beyond R(V)

The Astrophysical Journal
The dust extinction curve is typically parameterized by a single variable, R ( V ), in optical and near-infrared wavelengths. R ( V ) controls the slope of the extinction-versus-wavelength curve, and is thought to reflect the grain-size distribution and ...
Gregory M. Green, Xiangyu Zhang, Ruoyi Zhang   +2 more
doaj   +1 more source