Results 1 to 10 of about 880,117 (356)

Correcting for the Effects of Interstellar Extinction [PDF]

Publ.Astron.Soc.Pac. 111 (1999) 63-75, 1998
This paper addresses the issue of how best to correct astronomical data for the wavelength-dependent effects of Galactic interstellar extinction. The main general features of extinction from the IR through the UV are reviewed, along with the nature of observed spatial variations.
Aiello S., Bastiaansen P. A., Carnochan D. J., Edward L. Fitzpatrick, FitzGerald M. P., Franco M. L., Jenniskens P., Kester D., Kiszkurno-Koziej E., Koornneef J., Morgan D. H., Schultz G. V., Seaton M. J., Wegner W., Whittet D. C. B.   +14 more
arxiv   +4 more sources

A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves [PDF]

Astrophys.J.594:279-293,2003, 2003
We present an exhaustive, quantitative comparison of all of the known extinction curves in the Small and Large Magellanic Clouds (SMC and LMC) with our understanding of the general behavior of Milky Way extinction curves. The R_V dependent CCM relationship and the sample of extinction curves used to derive this relationship is used to describe the ...
Aiello S., Arlo U. Landolt, Bouchet P., Epchtein N., Geoffrey C. Clayton, Issa M. R., K. A. Misselt, Karl D. Gordon, Koornneef J., Lequeux J., Michael J. Wolff, Morgan D. H., Prevot M. L.   +12 more
arxiv   +3 more sources

On Dust Extinction of Gamma-ray Burst Host Galaxies [PDF]

, 2008
Although it is well recognized that gamma-ray burst (GRB) afterglows are obscured and reddened by dust in their host galaxies, the wavelength-dependence and quantity of dust extinction are still poorly known. Current studies on this mostly rely on fitting the afterglow spectral energy distributions (SEDs) with template extinction models.
Kann, D. A., Klose, S., Li, Aigen, Liang, S. L., Wang, Y. J., Wei, D. M.   +5 more
arxiv   +4 more sources

A three-dimensional Galactic extinction model [PDF]

Astron.Astrophys.409:205-216,2003, 2003
A large-scale three-dimensional model of Galactic extinction is presented based on the Galactic dust distribution model of Drimmel and Spergel (2001). The extinction A_V to any point within the Galactic disk can be quickly deduced using a set of three-dimensional cartesian grids. Extinctions from the model are compared to empirical extinction measures,
A. Cabrera-Lavers, Arenou, Belokurov, Bissantz, Bland-Hawthorn, Blitz, Chen, Davies, Djorgovski, Drimmel, Drimmel, Fitzpatrick, Freudenreich, Georgelin, Grocholski, Hakkila, Launhardt, López-Corredoira, M. López-Corredoira, Mathis, Mendez, Neckel, Ortiz, Picaud, Pietrzynski, R. Drimmel, Rieke, Robin, Schlegel, Skrutskie, Taylor, Wainscoat, Weiland   +32 more
arxiv   +4 more sources

Extinction Law at a Distance up to 25 kpc toward the Galactic Poles [PDF]

Astronomy Letters 42 (2016) 445-459, 2016
Photometry from the Tycho-2, 2MASS, and WISE catalogues for clump and branch giants at a distance up to 25 kpc toward the Galactic poles has allowed the variations of various characteristics of the infrared interstellar extinction law with distance to be analyzed.
Gontcharov, George
arxiv   +3 more sources

Peering through the veil: near-infrared photometry and extinction for the Galactic nuclear star cluster [PDF]

arXiv, 2009
The aims of this work are to provide accurate photometry in multiple near-infrared broadband filters, to determine the power-law index of the extinction-law toward the central parsec of the Galaxy, to provide measurements of the absolute extinction toward the Galactic center, and finally to measure the spatial variability of extinction on arcsecond ...
Eckart, A., Muzic, K., Najarro, F., Schoedel, R.   +3 more
arxiv   +3 more sources

Extinction and morphospace occupation: A critical review

Cambridge Prisms: Extinction, 2023
Processes of extinction, especially selectivity, can be studied using the distribution of species in morphospace. Random extinction reduces the number of species but has little effect on the range of morphologies or ecological roles in a fauna or flora ...
P. David Polly
doaj   +1 more source

Deterministic and stochastic dynamics of a modified Leslie-Gower prey-predator system with simplified Holling-type Ⅳ scheme

Mathematical Biosciences and Engineering, 2021
In this paper, a prey-predator model with modified Leslie-Gower and simplified Holling-type Ⅳ functional responses is proposed to study the dynamic behaviors.
Lin Li, Wencai Zhao
doaj   +1 more source

Analysis of a stochastic predator-prey system with mixed functional responses and Lévy jumps

AIMS Mathematics, 2021
In this paper, we consider a stochastic two predator-one prey system consisting of prey, intermediate predator and top predator with Lévy jumps. Here we consider Ratio-dependent function response between intermediate predator and top predator and other ...
Xuegui Zhang, Yuanfu Shao
doaj   +1 more source

Extinction behavior for a parabolic p-Laplacian equation with gradient source and singular potential

AIMS Mathematics, 2022
We concern with the extinction behavior of the solution for a parabolic p-Laplacian equation with gradient source and singular potential. By energy estimate approach, Hardy-Littlewood-Sobolev inequality, a series of ordinary differential inequalities ...
Dengming Liu , Luo Yang
doaj   +1 more source