Results 81 to 90 of about 195,388 (199)

Extinction Laws toward Stellar Sources within a Dusty Circimstellar Medium and Implications for Type Ia Supernovae

, 2016
Many astronomical objects are surrounded by dusty environments. In such dusty objects, multiple scattering processes of photons by circumstellar (CS) dust grains can effectively alter extinction properties.
Maeda, K., Nagao, T., Nozawa, T.
core   +1 more source

Three-dimensional extinction mapping and selection effects [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
13 pages, 8 figures. Submitted for publication in MNRAS.
openaire   +2 more sources

FUSE Measurements of Far Ultraviolet Extinction. I. Galactic Sight Lines

, 2005
We present extinction curves that include data down to far ultraviolet wavelengths (FUV; 1050 - 1200 A) for nine Galactic sight lines. The FUV extinction was measured using data from the Far Ultraviolet Spectroscopic Explorer. The sight lines were chosen
Brian Rachford, Bruce T. Draine, Cousins A. W. J., Denoyelle J., Douglas C. B. Whittet, Dworetsky M. M., Feinstein A., Forbes D., Geoffrey C. Clayton, Hill P. W., Hill P. W., John S. Mathis, Karl D. Gordon, Mendoza E. E., Michael J. Wolff, Peter G. Martin, Snow T. P., Stefan I. B. Cartledge, Theodore P. Snow, Ulysses J. Sofia, Zubko V. G.   +20 more
core   +1 more source

Serotonergic Modulation of Conditioned Fear

Scientifica, 2012
Conditioned fear plays a key role in anxiety disorders as well as depression and other neuropsychiatric conditions. Understanding how neuromodulators drive the associated learning and memory processes, including memory consolidation, retrieval/expression,
Judith R. Homberg
doaj   +1 more source

Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis?

Geosciences, 2012
Ocean acidification in modern oceans is linked to rapid increase in atmospheric CO2, raising concern about marine diversity, food security and ecosystem services.
Marie-Béatrice Forel, Pierre-Yves Collin, Yue Li, Stephen Kershaw, Sylvie Crasquin   +4 more
doaj   +1 more source

Determining the extragalactic extinction law with SALT. II. Additional sample

, 2010
We present new results from an on-going programme to study the dust extragalactic extinction law in E/S0 galaxies with dust lanes with the Southern African Large Telescope (SALT) during its performance-verification phase. The wavelength dependence of the
Alexei Y. Kniazev, Amanda Gulbis, Bertola, Bertola, Buckley, Cardelli, Chappell, Combes, Darragh O'Donoghue, Datta, David A. H. Buckley, Davidge, De Vaucouleurs, Draine, Ebneter, Elmegreen, Elmegreen, Elmegreen, Encarni Romero-Colmenero, Finkelman, Finkelman, Fisher, Goudfrooij, Goudfrooij, Hawarden, Hildebrand, Ido Finkelman, Keel, Khalil, Knapp, Mandelbrot, Mathis, Nicola Loaring, Noah Brosch, O'Donoghue, Patil, Paturel, Petri Väisänen, Ramotholo Sefako, Savage, Sánchez, Sánchez, Tran, Westpfahl, Yas Hashimoto, Young   +45 more
core   +1 more source

Extinctions in marine plankton preceded by stabilizing selection

, 2019
AbstractUnless they adapt, populations facing persistent stress are threatened by extinction. Theoretically, populations facing stress can react by either disruption, increasing trait variation, or stabilisation, decreasing trait variation. In the short term, the more economical response is stabilisation, because it quickly transfers a large part of ...
Weinkauf, Manuel F. G., Bonitz, Fabian G. W., Martini, Rossana, Kučera, Michal   +3 more
openaire   +4 more sources

Extinction of Taurus, Orion, Perseus and California Molecular Clouds Based on the LAMOST, 2MASS, and Gaia Surveys. II. The Extinction Law

The Astronomical Journal
The extinction law from ultraviolet (UV) to infrared (IR; 0.2–24 μ m) is determined by relying on the blue-edge method and color-excess ratios for some nearby molecular clouds, from the low-mass star-forming region to the massive star-forming region. The
ZheTai Cao, Biwei Jiang, Shu Wang, Jun Li   +3 more
doaj   +1 more source

Ultra-Small and Fabrication-Tolerant Silicon Polarization Beam Splitter Using Sharp Bent Directional Coupler

IEEE Photonics Journal, 2018
An ultra-small polarization beam splitter on silicon-on-insulator platform is proposed and demonstrated experimentally employing a sharp bent directional coupler. The coupling length of our device is only 0.764 μm.
Xiaodong Wang, Xueling Quan, Wei Zhang, Jie Hu, Chong Shen, Xiulan Cheng   +5 more
doaj   +1 more source

Changes in Mammalian Body Length over 175 Years - Adaptations to a Fragmented Landscape?

Ecology and Society, 2003
The potential consequences of anthropogenic habitat fragmentation on species diversity and extinction have drawn considerable attention in recent decades.
Niels Martin Schmidt, Per Moestrup Jensen   +1 more
doaj   +1 more source