Results 101 to 110 of about 40,765 (217)

Wave length dependence of polarization by small graphite flakes [PDF]

Graphite polarization data for semi-quantitative estimation of interstellar radiation wave extinction by small graphite ...
Greenberg, J. M.
core   +1 more source

Estimating dust distances to Type Ia supernovae from colour excess time-evolution

, 2017
We present a new technique to infer dust locations towards reddened Type Ia supernovae and to help discriminate between an interstellar and a circumstellar origin for the observed extinction. Using Monte Carlo simulations, we show that the time-evolution
Amanullah, R., Bulla, M., Feindt, U., Ferretti, R., Goobar, A.   +4 more
core   +1 more source

Life Cycle of Dust in the Magellanic Clouds and the Milky Way

, 2014
To a great extent, our understanding of the life cycle of dust is based on the observational and theoretical studies of the Milky Way and the Magellanic Clouds, which will be the topic of this contribution. Over past years, a large volume of observations
Henning, Thomas, Zhukovska, Svitlana
core   +1 more source

Luminosity and Intrinsic Color Calibration of Main-Sequence Stars With 2Mass Photometry: All Sky Local Extinction

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
doaj   +1 more source

Quantifying interstellar extinction at high Galactic latitudes

Monthly Notices of the Royal Astronomical Society
ABSTRACT A detailed map of the distribution of dust at high Galactic latitudes is essential for future cosmic microwave background polarization experiments because the dust, while diffuse, remains a significant foreground in these regions.
Matthew O’Callaghan, Gerry Gilmore, Kaisey S Mandel   +2 more
openaire   +2 more sources

DIBs, Interstellar Dust, and Extinction [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractThe 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 than in dense clouds.
openaire   +1 more source

The Role of Polycyclic Aromatic Hydrocarbons in Ultraviolet Extinction. I. Probing small molecular PAHs

, 2003
We have obtained new STIS/HST spectra to search for structure in the ultraviolet interstellar extinction curve, with particular emphasis on a search for absorption features produced by polycyclic aromatic hydrocarbons (PAHs).
A. N. Witt, Allain T., Allain T., Allamandola L. J., Allamandola L. J., Boulanger F., D. C. B. Whittet, Duley W. W., F. Salama, Geoffrey C. Clayton, Karl D. Gordon, L. J. Allamandola, Leitherer C., Li A., Mattila K., Michael J. Wolff, Onaka T., Peter G. Martin, Schutte W. A., Smith R. G., T. P. Snow   +20 more
core   +1 more source

On Absorption by Circumstellar Dust, With the Progenitor of SN2012aw as a Case Study

, 2012
We use the progenitor of SN2012aw to illustrate the consequences of modeling circumstellar dust using Galactic (interstellar) extinction laws that (1) ignore dust emission in the near-IR and beyond; (2) average over dust compositions, and (3) mis ...
C. S. Kochanek, Draine, Fraser, Freedman, Gehrels, Goobar, Immler, Ivezic, Ivezic, Kochanek, Kochanek, Massey, Matzner, Moretti, O'Connor, Prieto, R. Khan, Soderberg, Stockdale, Sugerman, Szczygieł, Thompson, Ugliano, Van Dyk, Wang, X. Dai, Yadav   +26 more
core   +1 more source

Extinction Distributions in Nearby Star-resolved Galaxies. I. M31

The Astronomical Journal
An extinction distribution of the Andromeda galaxy (M31) is constructed with member stars as tracers by fitting multiband photometric data from UKIRT/WFCAM, Panoramic Survey Telescope and Rapid Response System 1, and Gaia DR3.
Yuxi Wang, Jian Gao, Yi Ren, Bingqiu Chen   +3 more
doaj   +1 more source

A 3D Automated Classification Scheme for the TAUVEX data pipeline

, 2007
In order to develop a pipeline for automated classification of stars to be observed by the TAUVEX ultraviolet space Telescope, we employ an artificial neural network (ANN) technique for classifying stars by using synthetic spectra in the UV region from ...
Allen, Alonso, Archana Bora, Bailer-Jones, Bailer-Jones, Bertone, Colina, Erika Bëohm-Vitense, Gulati, Gulati, Gulati, Gupta, Gupta, Harinder P. Singh, Jayant Murthy, Johnson, K. Duorah, Lang, Maheshwar, Murthy, Ranjan Gupta, Rekhesh Mohan, Ridgway, Rodriguez-Merino, Seaton, Singh, Singh, Sujatha, Vaidya, Vaidya, Valdes   +30 more
core   +1 more source