Results 91 to 100 of about 40,765 (217)

Variations of the Ratio of Total-To-selective Extinction in the Galaxy

Open Astronomy, 2003
The results of the study of variations of total-to-selective extinction RV near the Galactic plane (-12° ≤ b ≤+12°) are presented. It is shown that variations of RV range from 1.9 to 3.4 and it is not possible to determine its typical value for the ...
Sūdžius J., Raudeliūnas S.
doaj   +1 more source

Estimation of Host Galaxy Extinction for SNe Ia

Galaxies
Type Ia supernovae are used as fundamental probes of the cosmological parameters, based on a tight empirical relation between their peak luminosity and the width of their light curve. However, it has been recognized that SNe Ia are not “standard” candles,
Oleg Malkov, Alexey Sytov, Gang Zhao, Zehao Zhong   +3 more
doaj   +1 more source

A search for diffuse bands in the circumstellar envelopes of post-AGB stars

, 2007
In this work we present the results of a systematic search for diffuse bands (DBs, hereafter) in the circumstellar envelopes of a carefully selected sample of post-AGB stars.
Allamandola, Arellano, Arkhipova, Bakker, Bujarrabal, Clube, Cohen, Cox, Cox, Crawford, D. A. García Hernández, de Jong, Desmurs, Douglas, Drimmel, Ehrenfreund, Ehrenfreund, Fernie, Fernández de Córdoba, Fitzgerald, Foing, Fujii, Fulara, Galazutdinov, García-Lario, García-Lario, García-Lario, Gauba, Gauba, Gauba, Guarinos, Guarinos, Heap, Heger, Herbig, Herbig, Hrivnak, Hrivnak, Hrivnak, Hrivnak, Hrivnak, Hrivnak, Hrivnak, Hu, Hu, Iglesias-Groth, Iglesias-Groth, Jenniskens, Kendall, Kerr, Klochkova, Klochkova, Klochkova, Krelowski, Krelowski, Krelowski, Kwok, Kwok, Le Bertre, Le Bertre, Le Bertre, Leger, Lewis, M. A. Satorre, Maas, Malfait, Mauron, McCall, Megier, Meixner, Merrill, N. L. J. Cox, O. Suárez, Oudmaijer, P. García Lario, Parthasarathy, Pottasch, Prichet, R. Luna, Reddy, Reddy, Reed, Reyniers, Ruiterkamp, Salama, Salama, Sarre, Sarre, Scarrott, Snow, Snow, Suárez, te Lintel Hekkert, Thorburn, Torres-Peimbert, Turner, Van de Steene, Van der Veen, Van der Zwet, Van Winckel, Van Winckel, Volk, Weselak, Zacs, Zacs, Zacs, Zacs   +106 more
core   +2 more sources

Overlapping Open Clusters NGC 1750 and NGC 1758 behind the Taurus Dark Clouds. II. CCD Photometry in the Vilnius System

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., Kazlauskas A., Černiauskas A., Boyle R. P., Vrba F. J., Philip A. G. Davis, Laugalys V., Černis K., Smriglio F.   +8 more
doaj   +1 more source

Mapping the Milky Way bulge at high resolution: the 3D dust extinction, CO, and X factor maps

, 2014
Three dimensional interstellar extinction maps provide a powerful tool for stellar population analysis. We use data from the VISTA Variables in the Via Lactea survey together with the Besan\c{c}on stellar population synthesis model of the Galaxy to ...
Chen, B. Q., Enokiya, R., Fukui, Y., Gonzalez, O. A., Jiang, B. W., Minniti, D., Rejkuba, M., Schultheis, M., Torii, K.   +8 more
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Interstellar Extinction in External Galaxies [PDF]

Symposium - International Astronomical Union, 1989
In this paper I review the existing measurements of the wavelength dependence of interstellar extinction arising from dust situated outside the Milky Way galaxy. This paper emphasizes studies of extinction in the Large and Small Magellanic Clouds. I discuss the UV extinction properties, as well as the optical and near-IR properties as determined from ...
openaire   +1 more source

Dust in the Local Group

, 2015
How dust absorbs and scatters starlight as a function of wavelength (known as the interstellar extinction curve) is crucial for correcting for the effects of dust extinction in inferring the true luminosity and colors of reddened astrophysical objects ...
Gao, Jian, Jiang, B. W., Li, Aigen, Wang, Shu   +3 more
core   +1 more source

Luminosity Distance and Extinction by Submicrometer-sized Grains

The Astrophysical Journal Letters
The 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
doaj   +1 more source

Narrow absorption lines from intervening material in supernovae

Astronomy & Astrophysics
Narrow 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., González-Gaitán Santiago, Anderson Joseph P., Galbany Lluís   +3 more
doaj   +1 more source

The extinction curve in the visible and the value of Rv

, 2012
This article discusses the interstellar extinction curve in the visible and the value of Rv. It is concluded that the visible extinction curve is likely to be linear in the visible, and that indirect estimates of Rv from tentative determinations of Av ...
Ardeberg, Balázs, Bondar, Borgman, Cardelli, Divan, Greenstein, Greenstein, Greenstein, Hall, Henyey, Henyey, Hoyle, Johnson, Johnson, Johnson, Le Borgne, Mendoza, Nandy, Rozis-Saulgeot, Savage, Schalén, Schild, Schlafly, Schlegel, Schultz, Sherwood, Stead, Stebbins, Stebbins, Trumpler, Turner, Wegner, Whitford, Wickramasinghe, Zagury, Zagury   +36 more
core   +1 more source