Results 101 to 110 of about 2,805 (218)
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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Open Astronomy, 2003 We present a new color index vs. absolute magnitude calibration of 2MASS JHK photometry. For the A0 to ~G5 and M segments of the main sequence information on the amount of interstellar extinction and its location in space may be obtained.
Knude Jens, Fabricius Claus
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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 ...
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Interstellar Extinction in 20 Open Star Clusters [PDF]
, 2017 The interstellar extinction law in 20 open star clusters namely, Berkeley 7, Collinder 69, Hogg 10, NGC 2362, Czernik 43, NGC 6530, NGC 6871, Bochum 10, Haffner 18, IC 4996, NGC 2384, NGC 6193, NGC 6618, NGC 7160, Collinder 232, Haffner 19, NGC 2401, NGC
Geeta Rangwal +3 more
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Study of interstellar extinction in some young open clusters [PDF]
, 1987 Interstellar extinction has been studied in 15 open clusters, based on reliable cluster members and precise observational data. Out of these, 10 show nonuniform extinction across the cluster region.
Ram Sagar,
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A Computerized Model of Large-Scale Visual Interstellar Extinction [PDF]
, 1997 A numerical algorithm has been developed for calculating three-dimensional visual interstellar extinction and its error from inputs of Galactic longitude, Galactic latitude, and distance.
Stidham, Brett J. +3 more
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JHK photometric study of the variable interstellar extinction in the direction of open star cluster NGC 654 [PDF]
, 1989 JHK magnitudes have been determined for 18 stars in the field of NGC 654. Study of the interstellar extinction law in the cluster direction indicates an anomalous distribution of interstellar grains causing more extinction in U and B pass-bands compared ...
Ram Sagar,, Yu, Qian Zhong
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The Infrared Complex Refractive Index and Band Strengths of Coronene Thin Films
The Astrophysical JournalPolycyclic aromatic hydrocarbon (PAH) molecules have long been theorized to be present in a multitude of interstellar environments. The radio-frequency detections of specific cyanosubstituted PAH molecules in the Taurus Molecular Cloud have provided new ...
J. E. Roser, L. Jovanović, A. Ricca
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Foreground Dust Properties toward the Cluster NGC 7380
The Astronomical JournalUsing starlight polarization, we present the properties of foreground dust toward cluster NGC 7380 embedded in H ii region Sh 2-142. Observations of starlight polarization are carried out in four filters using an imaging polarimeter equipped with a 104 ...
Sadhana Singh +6 more
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The Astrophysical JournalUnderstanding variations in the dust extinction curve is imperative for using dust as a tracer of local structure in the interstellar medium, understanding dust chemistry, and performing extinction corrections.
Andrew K. Saydjari, Gregory M. Green
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