Results 81 to 90 of about 2,793 (219)
On the Variation of Interstellar Dust Extinction [PDF]
Dust obscures astronomical observations and plays a important role in the evolution of galaxies. Mapping dust in three dimensions not only allows accurate correction of observations but also constrains the evolution of the interstellar medium (ISM ...
Zhang, Xiangyu
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Open Astronomy, 2003 Seven-color photometry in the Vilnius system has been obtained for 420 stars down to V = 16 mag in the area containing the overlapping open clusters NGC 1750 and NGC 1758 in Taurus.
Straižys V. +8 more
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Interstellar extinction and polarization in the infrared
The Astrophysical Journal, 1990 The wavelength dependences of interstellar continuum extinction and polarization in the range 0.35-5 microns are examined. The existence of a universal extinction curve with power law index of about 1.8 extending from the near-IR to at least 5 microns appears to be established for both diffuse and dense cloud dust.
P. G. Martin, D. C. B. Whittet
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Grain growth, optical polarisation, and extinction in interstellar clouds
, 1989 Increases in the wavelength of maximum polarization and the ratio of total to selective extinction are generally assumed to be the result of grain growth in interstellar clouds.
Jones, A. P.
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The variation of interstellar extinction in the ultraviolet [PDF]
Monthly Notices of the Royal Astronomical Society, 1986 Les donnees UV concernant 92 des 154 etoiles rougies observees ne peuvent pas etre interpretees au moyen d'une loi d'extinction interstellaire unique. Les variations de la courbe d'extinction requierent au moins deux agents, pour interpreter les modifications de la pente et l'intensite de la raie a 2200 ...
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The smoothness of the interstellar extinction curve in the UV
, 2012 Context. As revealed by high-resolution spectral investigations in the wavelength range between 300 and 400 nm, the interstellar extinction curve does not display any of the sharp electronic absorption bands that are characteristic for large polyatomic ...
M. Steglich +5 more
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Luminosity Distance and Extinction by Submicrometer-sized Grains
The Astrophysical Journal LettersThe 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
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Narrow absorption lines from intervening material in supernovae
Astronomy & AstrophysicsNarrow interstellar absorption features in supernova (SN) spectra serve as valuable diagnostics for probing dust extinction and the presence of circumstellar or interstellar material.
Gutiérrez Claudia P. +3 more
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X-ray extinction from interstellar dust
, 2019 Aims. We present a study on the prospects of observing carbon, sulfur, and other lower abundance elements (namely Al, Ca, Ti, and Ni) present in the interstellar medium using future X-ray instruments.
D. Rogantini +11 more
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Models for Interstellar Extinction in the Galaxy
The Astronomical Journal, 2005 We present two models for the interstellar extinction in the Galaxy that are based on the hypothesis that the interstellar dust is well mixed with the gas, with a constant ratio (except for a small dependence of metallicity on the Galactic radius), and therefore that the extinction is proportional to the column density of the gas. In the first model we
E. B. Amôres, J. R. D. Lépine
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