Results 31 to 40 of about 218,608 (214)

Graphite and Interstellar Extinction [PDF]

open access: yesInternational Astronomical Union Colloquium, 1965
The Theory That Graphite Particles could be responsible for interstellar extinction is presented in references 1 and 2, and this paper will present evidence that further supports this contention. The complex dielectric constant (m = n(l — ik) for graphite has been measured as a function of energy by the authors of reference 3, and the optical constants
T. P. Stecher, Bertram Donn
openaire   +1 more source

Interstellar Silicon Depletion and the Ultraviolet Extinction [PDF]

open access: yes, 2017
Spinning small silicate grains were recently invoked to account for the Galactic foreground anomalous microwave emission. These grains, if present, will absorb starlight in the far ultraviolet (UV).
Mishra, Ajay   +3 more
core   +3 more sources

Interstellar extinction from photometric surveys: application to four high-latitude areas

open access: yesOpen Astronomy, 2018
Information on interstellar extinction and dust properties may be obtained from modern large photometric surveys data. Virtual Observatory facilities allow users to make a fast and correct cross-identification of objects from various surveys. It yields a
Malkov Oleg   +13 more
doaj   +1 more source

Unified model for interstellar extinction and polarization [PDF]

open access: yes, 1967
The development of improved techniques for measuring interstellar extinction and polarization has led to a revival of interest in the investigation of grain models.
Krishna Swamy, K. S.   +1 more
core   +1 more source

Time-series surveys and pulsating stars: The near-infrared perspective

open access: yesEPJ Web of Conferences, 2017
The purpose of this review is to discuss the advantages and problems of nearinfrared surveys in observing pulsating stars in the Milky Way. One of the advantages of near-infrared surveys, when compared to optical counterparts, is that the interstellar ...
Matsunaga Noriyuki
doaj   +1 more source

Interstellar extinction by quartz grains [PDF]

open access: yes, 1968
Knacke has pointed out that quartz particles possess strong absorption bands at λ ~ 10μ. Although these features occur in the spectral region 3-10μ, where Johnson has found humps in interstellar extinction curves, by itself
Krishna Swamy, K. S.   +1 more
core   +1 more source

The computation of interstellar extinction in photoionized nebulae

open access: yesAstronomy & Astrophysics, 2023
Context. The proper plasma analysis practice (PPAP) method has been proposed to analyze spectroscopic data of ionized nebulae. The method is based on a coherent and simultaneous determination of the reddening correction and physical conditions in nebulae.
Christophe Morisset   +7 more
openaire   +2 more sources

DIBs, interstellar dust, and extinction [PDF]

open access: yes, 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

Structure in the Interstellar-Extinction Curve

open access: yesThe Astrophysical Journal, 1971
Using photographic techniques, it was attempted to obtain spectra of the interstellar material at a resolution of about 5 A. Three classes of structures are discussed. It is pointed out that the optical observations can be extended into the UV with a resolution of 0.4 A using the OAO-C telescope.
openaire   +2 more sources

The nature of interstellar dust as revealed by light scattering

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
Interstellar dust was first identified through the extinction that it causes of optical starlight. Initially, observational and theoretical studies of extinction were made to identify simple ways of removing the effect of extinction.
D. A. Williams
doaj   +1 more source

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