Results 11 to 20 of about 4,499,156 (300)

Time-Dependent Dust Formation in Novae [PDF]

Journal of Astronomy and Space Sciences, 1991
The dust formation processes in novae are investigated with close attention to recent infrared observations. Using mainly the classical nucleation theory, we have calculated the time scales of dust formation and growth in the environments of novae. Those
Kyung-Won Suh
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DUST FORMATION IN MACRONOVAE [PDF]

The Astrophysical Journal, 2014
We examine dust formation in macronovae (as known as kilonovae), which are the bright ejecta of neutron star binary mergers and one of the leading sites of r-process nucleosynthesis. We find that dust grains of r-process elements are difficult to form because of the low number density of the r-process atoms, while carbon or elements lighter than irons ...
Hajime Takami, Takaya Nozawa, Kunihito Ioka   +2 more
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Dust Formation in AGN Winds [PDF]

The Astrophysical Journal, 2019
Abstract Infrared observations of active galactic nuclei (AGNs) reveal emission from the putative dusty circumnuclear “torus” invoked by AGN unification, which is heated up by radiation from the central accreting black hole (BH). The strong 9.7 and 18 μm silicate features observed in the AGN spectra, in both emission and absorption ...
Arkaprabha Sarangi, Eli Dwek, Demos Kazanas   +2 more
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Dust Formation in a Galaxy with Primitive Abundances [PDF]

Science, 2009
Interstellar dust plays a crucial role in the evolution of galaxies. It governs the chemistry and physics of the interstellar medium. In the local universe, dust forms primarily in the ejecta from stars, but its composition and origin in galaxies at very early times remain controversial.
Sloan, G C, Matsuura, M., Zijlstra, Albert A, Lagadec, Eric, Groenewegen, M A T, Wood, Peter R, Szyszka, C, Bernard-Salas, J, van Loon, Jacco Th   +8 more
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Saharan dust and ice nuclei over Central Europe [PDF]

, 2010
Surface measurements of aerosol and ice nuclei (IN) at a Central European mountain site during an episode of dust transport from the Sahara are presented.
B. Nillius, Levin, Zev, Barrie, Leonard A., Nillius, Björn, M. Ebert, Bingemer, Heinz, S. Weinbruch, Ebert, Martin, Nickovic, Slobodan, Haunold, Werner, H. Klein, U. Bundke, Klein, Holger, Bundke, Ulrich, Weinbruch, Stephan, H. Bingemer, L. Schuetz, Z. Levin, Schuetz, Lothar, L. A. Barrie, S. Nickovic, W. Haunold   +21 more
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Modelling soil dust aerosol in the Bodélé depression during the BoDEx campaign [PDF]

, 2006
We present regional model simulations of the dust emission events during the Bodélé Dust Experiment (BoDEx) that was carried out in February and March 2005 in Chad. A box model version of the dust emission model is used to test different input parameters
Todd, M., J Helmert (16052072), Dubovik, O., Dubovik, O, J. Helmert, B. Heinold, Tegen, I, R. Washington, Helmert, J, Washington, R, Tegen, I., I Tegen (16051628), Heinold, B, M. Todd, Todd, MC, Heinold, B., Martin Todd (4462747), B Heinold (16051742), I. Tegen, O. Dubovik, Washington, R., O Dubovik (8761467), Helmert, J., R Washington (16051622)   +23 more
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Dust Formation in M-Stars [PDF]

Symposium - International Astronomical Union, 1987
A mechanism is proposed for the initiation of dust formation in stellar winds of M-type giants and supergiants. If Mg and Fe are ionized (M0…M4) dust formation is initiated by homogeneous nucleation of SiO, otherwise (later ≍ M2) by homogeneous nucleation of MgS. The condensation temperatures for these mechanisms agree well with observations.
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Experimental study of the role of physicochemical surface processing on the IN ability of mineral dust particles [PDF]

, 2011
During the measurement campaign FROST 2 (FReezing Of duST 2), the Leipzig Aerosol Cloud Interaction Simulator (LACIS) was used to investigate the influences of various surface modifications on the immersion freezing behavior of Arizona Test Dust (ATD ...
A. Kiselev, T. Clauss, Buchholz, A., E. Mikhailov, Stetzer, O., Kiselev, A., Sullivan, Ryan; id_orcid, Shaw, R. A., Bundke, Ulrich, P. J. DeMott, Reimann, Bernd, Mentel, T. F., Kiselev, Alexei, Wex, Heike, Stratmann, Frank, DeMott, P.J., Reitz, P., S. Hartmann, Clauss, T., B. Reimann, Petters, M., Reimann, B., O. Stetzer, P. Reitz, U. Bundke, Sullivan, R., Hartmann, Susan, Mentel, Thomas F., Sierau, Berko, Mikhailov, E., Petters, Markus D., Shaw, R.A., Stetzer, Olaf, DeMott, Paul J., R. C. Sullivan, Shaw, R., DeMott, P., Niedermeier, Dennis, Petters, M.D., R. A. Shaw, Bundke, U., A. Buchholz, Reitz, Paul, F. Stratmann, Hartmann, S., J. Schneider, Petters, M. D., Schneider, Johannes, Wex, H., Shaw, Raymond A., H. Wex, Niedermeier, D., Sullivan, Ryan C., Stratmann, F., Sullivan, R.C., Sullivan, R. C., Mentel, T.F., Schneider, J., B. Sierau, Clauss, Tina, Buchholz, Angela, D. Niedermeier, M. D. Petters, Mentel, T., T. F. Mentel, Mikhailov, Eugene, Sierau, B., Demott, P. J.   +67 more
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A STUDY OF MASS LOSS AND DUST FORMATION NEAR HOT STARS

Odessa Astronomical Publications, 2016
At present dust formation is well studied only near cool stars, whose surface temperatures are close to those of dust sublimation. Hot stars need to supply large amounts of circumstellar material to allow dust formation around them.
K. S. Kuratov, A. S. Miroshnichenko, A. V. Kusakin, N. Sh. Alimgazinova, A. Zh. Nuryzbaeva, A. B. Manapbaeva, A. K. Kuratova   +6 more
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Dust formation by failed supernovae [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
We consider dust formation during the ejection of the hydrogen envelope of a red supergiant during a failed supernova (SN) creating a black hole. While the dense, slow moving ejecta are very efficient at forming dust, only the very last phases of the predicted visual transient will be obscured. The net grain production consists of ~0.01 solar masses of
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