Results 41 to 50 of about 3,688 (211)

A Case for a Small to Negligible Influence of Dust Charging on the Ionization Balance in the Coma of Comet 67P [PDF]

, 2021
A recent work aided by Rosetta in situ measurements set constraints on the dust-to-gas mass emission ratio and the size distribution of dust escaping the nucleus of comet 67P/Churyumov–Gerasimenko near perihelion.
Morooka, Michiko,, Morooka, M., Vigren, Erik,, Rubin, M.,, Johansson, F. L., Morooka, Michiko, Marschall, Raphael, Vigren, Erik, Eriksson, Anders I., Marschall, R.,, Eriksson, A. I., Marschall, R., Vigren, E., Johansson, Fredrik L., Rubin, M., Eriksson, Anders I.,, Johansson, Fredrik L.,   +16 more
core   +1 more source

A Comprehensive Model of Morphologically Realistic Cosmic Dust Particles: An Application to Mimic the Unusual Polarization Properties of the Interstellar Comet 2I/Borisov

The Astrophysical Journal, 2023
The cosmic dust particles found in space are mainly porous aggregates of smaller grains. Theoretically, these aggregates are replicated using fractal geometry, assuming a cluster of spheres.
Prithish Halder, Sujan Sengupta
doaj   +1 more source

Synergistic transition from type‐I‐like to type‐II‐like symptomology in a pyrethroid mixture and its impact on knockdown–mortality relationships in Musca domestica L

Pest Management Science, EarlyView.
In the present study, relationship between knockdown and mortality of insecticides was examined against the adult female housefly, Musca domestica. Type‐I pyrethroid insecticides showed a weak linkage, as early knocked down flies did not always result in mortality, while type‐II pyrethroids and organophosphates exhibited strong correlation between the ...
Junho Yoon, Jun‐Hyung Tak
wiley   +1 more source

Dust Impact Monitor DIM Onboard Rosetta / Philae: Comparison of experimental Results and the Theory behind the Experiment

, 2013
The Rosetta lander spacecraft Philae will land on the nucleus surface of comet 67P/Churyumov-Gerasimenko in November 2014. Philae is equipped with the Dust Impact Monitor (DIM).
Seidensticker, Klaus J., Sperl, M., Arnold, W., Sperl, Matthias, Arnold, Walter, Flandes, A., Krüger, H., Fischer, Hans­-Herbert, Flandes, Alberto, Fischer, H., Krueger, Harald, Hirn, Attila, Seidensticker, Klaus Jürgen, Loose, A., Loose, Alexander, Seidensticker, Klaus Juergen, Fischer, Hans-Herbert, Seidensticker, K., Krüger, Harald   +18 more
core   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Ice, Ice, Maybe? Investigating 46P/Wirtanen’s Inner Coma for Icy Grains

The Planetary Science Journal, 2023
The release of volatiles from comets is usually from direct sublimation of ices on the nucleus, but for very or hyperactive comets other sources have to be considered to account for the total production rates.
Theodore Kareta, John W. Noonan, Walter M. Harris, Alessondra Springmann   +3 more
doaj   +1 more source

Interstellar Object 3I/ATLAS Observed from Mars by China’s Tianwen-1 Spacecraft

The Astrophysical Journal Letters
China’s Tianwen-1 Mars orbiter successfully imaged the third interstellar object, 3I/ATLAS, during its close encounter with Mars using the onboard HiRIC CMOS camera. This is China’s first deep-space observation of an astronomical object.
Xin Ren, Wei Yan, Ruining Zhao, Shu Wang, Xingye Gao, Qiang Fu, Qing Zhang, Bin Yang, Man-To Hui, Zhiyong Xiao, Xiaodong Liu, Cunhui Li, Renhao Tian, Wenguang Liu, Dong Wang, Shaoran Liu, Cong Ren, Jie Dong, Xinbo Zhu, Pan Xie, Jian-Yang Li, Yan Geng, Jianjun Liu   +22 more
doaj   +1 more source

The composition and size distribution of the dust in the coma of Comet Hale–Bopp

Icarus, 2005
We discuss the composition and size distribution of the dust in the coma of comet Hale-Bopp. We do this by fitting simultaneously the infrared emission spectrum measured by the infrared space observatory (ISO) and the measured degree of linear polarization of scattered light at various phase angles and 12 different wavelengths.
Min, M., Hovenier, J. W., de Koter, A., Waters, L. B. F. M., Dominik, C.   +4 more
openaire   +2 more sources

Modeling the effects of a faint dust coma on asteroid spectra [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractIn this work we use a simple model to study the influence of a faint dust coma on asteroid spectra, in an effort to reproduce the unusual spectral behavior seen on the asteroid (5201) Ferraz-Mello and other objects.
Jorge Márcio Carvano, Silvia Lorenz-Martins   +1 more
openaire   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source