Results 101 to 110 of about 8,101 (167)

Interstellar and cometary dust

, 1989
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  

DIBs, interstellar dust, and extinction

, 2014
The relationship between DIBs and dust is still unknown. The correlation between reddening and DIB strength means that the DIBs are mixed in with the dust and gas in interstellar clouds. The DIBs are relatively stronger in the diffuse interstellar medium
Clayton, G. C.
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

Aliphatic hydrocarbon content of interstellar dust

, 2018
There is considerable uncertainty as to the amount of carbon incorporated in interstellar dust. The aliphatic component of the carbonaceous dust is of particular interest because it produces a significant 3.4 mu m absorption feature when viewed against a
Schmidt, TW ; https://orcid.org/, B Günay, Schmidt, T. W., Nauta, K, Kable, SH ; https://orcid.org/, O Krechkivska, Afsar, M, Afsar, M., Krechkivska, O., Rawal, A ; https://orcid.org/, Krechkivska, O, A Rawal, Burton, MG ; https://orcid.org/, K Nauta, Nauta, K., Günay, B, M G Burton, Kable, S. H., Gunay, B., T W Schmidt, Burton, M. G., M Afşar, Rawal, A., Gunay, Burcu, S H Kable   +24 more
core   +1 more source

Interstellar Dust Grain Alignment

, 2018
Dust induced polarization is an efficient probe of the interstellar magnetic field. The combination of short wavelength dichroic extinction polarimetry with far-infrared/sub-mm wave emission observations, using modern instruments, allow us to measure the
Andersson, B.-G.
core  

Time Evolution of Optical Darkness in Gamma-Ray Burst Afterglow: The Case of GRB 240825A

The Astrophysical Journal
Long-duration gamma-ray bursts (GRBs) are believed to occur in star-forming regions. The multiwavelength follow-up observations of the early afterglow of GRB 240825A provided insights into the evolution of the optical-to-X-ray spectral feature of the ...
Rui-Zhi Li, Jirong Mao, Yuan-Pei Yang, Bo-Ting Wang, Fei-Fan Song, Yu-Xin Xin, Jin-Ming Bai   +6 more
doaj   +1 more source

Circumstellar dust

, 1986
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  

Interstellar Dust Models: Extinction, Absorption and Emission

, 2009
The observational constraints on interstellar dust are summarized. A dust model, consisting of a mixture of amorphous silicate, graphite, and PAH material that reproduces the observed interstellar extinction, is described.
B.T. Draine
core   +1 more source

Silicate Extinction Profile Based on the Stellar Spectrum by Spitzer/IRS

The Astrophysical Journal
The 9.7 and 18 μ m interstellar spectral features, arising from the Si–O stretching and O–Si–O bending modes of amorphous silicate dust, are the strongest extinction features in the infrared.
Zhenzhen Shao, Biwei Jiang
doaj   +1 more source

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