Results 41 to 50 of about 89,600 (153)

Spectropolarimetry of the Deep Impact target comet 9P/Tempel 1 with HiVIS [PDF]

, 2006
High resolution spectropolarimetry of the Deep Impact target, comet 9P/ Tempel 1, was performed during the impact event on July 4th, 2005 with the HiVIS Spectropolarimeter and the AEOS 3.67m telescope on Haleakala, Maui. We observed atypical polarization
A'Hearn, Bohren, Collet, D.M. Harrington, Donati, Fernández, Goodrich, Greenberg, Gustafson, Hadamcik, Hadamcik, Hadamcik, Hadamcik, Hadamcik, Hadamcik, Hanner, Hanner, Hapke, Harker, Harrington, J.R. Kuhn, Jehin, K. Meech, K. Whitman, Kimura, Kimura, Kimura, Kiselev, Kissel, Kolokolova, Kolokolova, L. Kolokolova, Lasue, Levasseur-Regourd, Levasseur-Regourd, Lisse, Mann, Meech, Mishchenko, Mumma, Myers, Petit, Schleicher, Schulz, Sugita, Thornton   +45 more
core   +5 more sources

Seasonal and Local Time Variation in the Observed Peak of the Meteor Altitude Distributions by Meteor Radars

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 21, 16 November 2024.
Abstract Meteoroids of sub‐milligram sizes burn up high in the Earth's atmosphere and cause streaks of plasma trails detectable by meteor radars. The altitude at which these trails, or meteors, form depends on a number of factors including atmospheric density and the astronomical source populations from which these meteoroids originate.
E. C. M. Dawkins, D. Janches, G. Stober, J. D. Carrillo‐Sánchez, R. S. Lieberman, C. Jacobi, T. Moffat‐Griffin, N. J. Mitchell, N. Cobbett, P. P. Batista, V. F. Andrioli, R. A. Buriti, D. J. Murphy, J. Kero, N. Gulbrandsen, M. Tsutsumi, A. Kozlovsky, M. Lester, J.‐H. Kim, C. Lee, A. Liu, B. Fuller, D. O’Connor, S. E. Palo, M. J. Taylor, J. Marino, N. Rainville   +26 more
wiley   +1 more source

Waves and Instabilities in Saturn's Magnetosheath: 2. Dispersion Relation Analysis

Journal of Geophysical Research: Space Physics, Volume 129, Issue 10, October 2024.
Abstract The WHAMP (Rönnmark, 1982, https://inis.iaea.org/search/search.aspx?orig_q=RN:14744092) and LEOPARD (Astfalk & Jenko, 2017, https://doi.org/10.1002/2016ja023522) dispersion relation solvers were used to evaluate the growth rate and scale size for mirror mode (MM) and ion cyclotron (IC) instabilities under plasma conditions resembling Saturn's ...
I. Cheng, N. Achilleos, X. Blanco‐Cano, C. Bertucci, P. Guio   +4 more
wiley   +1 more source

Photometry of comet C/2011 L4 (PANSTARRS) at 4.4 - 4.2 AU heliocentric distances

, 2014
We present an analysis of the photometric data of comet C/2011 L4 (PANSTARRS) observed at heliocentric distance of 4.4 - 4.2 AU. The comet C/2011 L4 (PANSTARRS) shows one significant activity, despite of its quite large heliocentric distance.
Borysenko, Serhii, Golovin, Alex, Ivanova, Oleksandra   +2 more
core   +1 more source

Atmospheric collection of extraterrestrial dust at the Earth's surface in the mid‐Pacific

Meteoritics &Planetary Science, Volume 59, Issue 10, Page 2789-2817, October 2024.
Abstract The Kwajalein micrometeorite collection utilized high volume air samplers fitted with polycarbonate membrane filters to capture particles directly from the atmosphere at the Earth's surface. This initial study focused on identifying cosmic spherule‐like particles, conservatively categorizing them into four groups based on bulk compositional ...
Penelope J. Wozniakiewicz, Luke S. Alesbrook, John P. Bradley, Hope A. Ishii, Mark C. Price, Michael. E. Zolensky, Donald E. Brownlee, Matthias van Ginneken, Matthew J. Genge   +8 more
wiley   +1 more source

2005–2010 Multiwavelength Campaing of OJ287

Acta Polytechnica, 2011
The light curve of quasar OJ287 extends from 1891 up today without major gaps. This is partly due to extensive studies of historical plate archives by Rene Hudec and associates, and partly due to several observing campaigns in recent times.
M. Valtonen, A. Sillanpää
doaj  

Resonance Broadening Induced Nonlinear Saturation of Kinetic Alfven Turbulence in the Interplanetary Plasma

, 1996
The saturation of ion cyclotron Alfven turbulence excited by beam particles is investigated using resonance broadening theory. The stochastic scattering which decorrelates particles, includes both random acceleration by electric fields and a turbulent ...
Aamodt, Akimoto, Akimoto, Antonsen, Coates, Dum, Dupree, Dupree, Dupree, Galeev, Galeev, Gary, Greenstadt, Hoshino, Kennel, M.V. Medvedev, Neubauer, Neubauer, P.H. Diamond, Reidler, Sagdeev, Shevchenko, Terasawa, Tsurutani, Tsurutani   +24 more
core   +1 more source

Explaining the Evolution of Ion Velocity Distributions at a Low Activity Comet

Journal of Geophysical Research: Space Physics, Volume 129, Issue 9, September 2024.
Abstract At a low activity comet the plasma is distributed in an asymmetric way. The hybrid simulation code Amitis is used to look at the spatial evolution of ion velocity distribution functions (VDFs), from the upstream solar wind (SW) to within the comet magnetosphere where the SW is heavily mass‐loaded by the cometary plasma.
A. Moeslinger, H. Gunell, H. Nilsson, S. Fatemi, G. Stenberg Wieser   +4 more
wiley   +1 more source

Chemical abundance of comets [PDF]

Observations of NH2, (OI) and molecular ion spectra in comets represent virtually all of the volatile fraction of a comet nucleus. Their study leads to the N2, NH3, H2O, CO2, CO content of the nucleus, and thus to important constraints on models of comet
Wehinger, Peter, Wyckoff, Susan
core   +1 more source

Aggregate dust model to study the polarization properties of comet C/1996 B2 Hyakutake

, 2010
In our present study, the observed linear polarization data of comet Hyakutake are studied at wavelengths $\lambda=0.365\mu m$, $\lambda=0.485\mu m$ and 0.684$\mu m$ through simulations using Ballistic Particle-Cluster Aggregate and Ballistic Cluster ...
Abinash Suklabaidya, Asoke Kumar Sen, Brownlee, Dollfus, Dorschner, Fulle, Hanner, Harker, Harker, Hayward, Himadri Sekhar Das, Jewitt, Joshi, Kikuchi, Lamy, Levasseur-Regourd, Lisse, Moreno, Mukai, Saonli Datta Majumder, Sen, Sen, Shen, Sitko, Wooden, Xing   +25 more
core   +1 more source