Results 181 to 190 of about 2,805 (218)

A binary merger product as the direct progenitor of a Type II-P supernova

Niu* Z, Sun* N, Zapartas* E, Souropanis D, Cui Y, Maund JR, Andrews JJ, Briel MM, Fraser M, Gossage S, Kruckow MU, Liotine C, Liu Z, Srivas PM, Teng E, Wang X, Yang Y, Liu J.   +17 more
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A Faint Progenitor System for the Faint Supernova 2024vjm

Zimmerman E, Gal-Yam A, Groot P, Ofek E, Roestel Jv, Pastorello A, Valenti S, Ravi A, Chen P, Schulze S, Blagorodnova N, Wavasseur M, Gómez-Muñoz M, Tranin H, de Wet S, Leloudas G, Vreeswijk P, Kwok L, Schwab M, Jha S, Maguire K, Sand D, Stringer E, Kupfer T, Faran T, Anderson J, Andrews J, Andrews M, Badash A, Bloemen S, Bostroem K, Chen T, Valle MD, Dimitriadis G, Dong Y, Farah J, Gillanders J, Godson B, Gromadzki M, Hiramatsu D, Hoang E, Howell D, Janzen D, Kuncarayakti H, Li J, Lyman J, Maeda K, Magee M, Mehta D, Milligan A, Moran S, Ni YQ, O’Neill D, Pearson J, Pieterse D, Pignata G, Reguitti A, Reichart D, Retamal NM, Santos R, Scaringi S, Shrestha M, Srivastav S, Stoppa F, Subrayan B, Valerin G, Wang X, Wynn K, Yaron O, Zang W.   +69 more
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Extinction and polarization of light by dust in the interstellar medium. Interstellar extinction curves

Astrofizika, 1986
A model of two-layer cylindrical interstellar dust grains is used to calculate the interstellar extinction curves in the visible and near infrared regions of the spectrum and the ratio R /sub V/ of the total to the selective extinction. It is assumed that the core of the two-layer grains consists of ''astronomical silicate'' and the mantle of dirty ice
V B Il'In
exaly   +2 more sources

A Model for Interstellar Extinction

Astrophysics and Space Science, 1982
From an analysis of the interstellar extinction we conclude that interstellar grains are of three main kinds: graphite spheres of radii ∼0.02 μm making up ∼10% of the total grain mass, small dielectric spheres of radius about 0.04 μm making up ∼25% of the mass, and hollow dielectric cylinders containing metallic iron with diameters of ∼2/3 μm making up
F. Hoyle, N.C. Wickramasinghe
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Buckminster Fullerene and Interstellar Extinction

Acta Astronomica, 2023
Most of over 500 Diffuse Interstellar Bands (DIBs) can not be assigned to any carrier. Only the infrared DIBs at 9348-9632 Å are known to be absorption lines of the buckminster fullerene cation C60+. We show that equivalent width of the 9577 Å DIB is correlated with the bump area on the ultraviolet extinction curve and with interstellar reddening E(B-V)
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Interstellar Dust and Extinction

Annual Review of Astronomy and Astrophysics, 1987
The ultraviolet (UV) region of the spectrum has been crucial in providing information on the nature of the material and size distribution of the particles of interstellar dust. Before there were any measurements of the UV properties of interstellar extinction, interstellar particles were believed to be composed primarily of dirty ices.
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Features of the interstellar extinction curve

Astrophysics and Space Science, 1975
The extinction curves for spherical particles are subject to the errors of the particle material’s refractive index. Their sensitivity to these errors has been investigated and is found to be dependent upon wavelength. For graphite, significant errors are produced in the far ultraviolet part of the extinction curve; for silicates, in the near ...
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The interstellar extinction curve

Publications of the Astronomical Society of the Pacific, 1993
The history of the study of interstellar extinction is briefly discussed. The methods used to determine the extinction law are presented and compared, and the main difficulties involving the application of certain methods are shown. This paper emphasizes the necessity of investigating single-clou extinction curves instead of ill-defined long distance ...
J. Krelowski, J. Papaj
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Interstellar Extinction and Polarisation

1991
In Chapter 1 we referred briefly to the early measurements of interstellar extinction over the UBV wavelength range that gave an approximately 1/λ extinction coefficient amounting typically to ~ 1–2 mag/kpc. We now discuss both extinction and polarisation observations in more detail with a view to using this data as discriminants for grain models in ...
F. Hoyle, N. C. Wickramasinghe
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