Results 51 to 60 of about 2,531 (226)

Study of Dust Impact Signals around Mars Using MAVEN/LPW Observations

The Astrophysical Journal
This study investigates short (millisecond) pulses detected by the Langmuir Probe and Waves instrument on board the Mars Atmosphere and Volatile Evolution spacecraft.
Samia Ijaz, Jakub Vaverka, Jana Šafránková, Zdeněk Němeček   +3 more
doaj   +1 more source

Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

Progress in Earth and Planetary Science, 2019
The ca 252 Ma Permian–Triassic boundary (PTB) represents the most severe mass extinction event of the Phanerozoic, with the disappearance of ~ 80% of marine invertebrate species.
Tetsuji Onoue, Naoto Takahata, Mitsutaka Miura, Honami Sato, Akira Ishikawa, Katsuhito Soda, Yuji Sano, Yukio Isozaki   +7 more
doaj   +1 more source

Ryugu’s Anhydrous Ingredients and Their Spectral Link to Primitive Dust from the Outer Solar System

The Astrophysical Journal Letters, 2023
Ryugu is a second-generation C-type asteroid formed by the reassembly of fragments of a previous larger body in the main asteroid belt. While the majority of Ryugu samples returned by Hayabusa2 are composed of a lithology dominated by aqueously altered ...
R. Brunetto, C. Lantz, Y. Fukuda, A. Aléon-Toppani, T. Nakamura, Z. Dionnet, D. Baklouti, F. Borondics, Z. Djouadi, S. Rubino, K. Amano, M. Matsumoto, Y. Fujioka, T. Morita, M. Kukuiri, E. Kagawa, M. Matsuoka, R. Milliken, H. Yurimoto, T. Noguchi, R. Okazaki, H. Yabuta, H. Naraoka, K. Sakamoto, S. Tachibana, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, S. Watanabe, Y. Tsuda   +39 more
doaj   +1 more source

Second‐Scale Formation of Non‐Field‐Aligned Plasma Irregularities Observed From a High‐Altitude 43‐Cassiopeiids Fireball

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract High‐altitude optical meteors initiating above 150 km are exceedingly rare, with confirmed observations largely confined to the Leonids. Using the Meteor and ionospheric Irregularity Observation System, we recorded a bright 43‐Cassiopeiids fireball with heterogeneous material. It initiated luminously at an exceptional altitude of 157.8 ± $\pm $
Yi Li, Guozhu Li, Zhi Wu, Wenzhi Chen, Zhaoguo Huang, Lianhuan Hu, Xiukuan Zhao, Wenjie Sun, Haiyong Xie, Guofeng Dai, Jianfei Liu, Baiqi Ning, Shoumin Chang   +12 more
wiley   +1 more source

The Contribution of the Russell‐McPherron Effect to the Semiannual Variation in Thermospheric Density

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract A number of external sources and internal circulation mechanisms have been proposed to explain the well‐known semiannual variation in global mean thermospheric densities. We use the polarity of the Y $Y$‐component (dawn to dusk) of the Interplanetary Magnetic Field (IMF) in the Geocentric Solar Equatorial (GSEQ) frame to identify the influence,
Mike Lockwood, Chris J. Scott, James O’Donoghue, Mat J. Owens, Luke A. Barnard   +4 more
wiley   +1 more source

Sources of Interplanetary Dust [PDF]

Symposium - International Astronomical Union, 1980
It is generally assumed that ejections from active cometary nuclei are the major source of replenishment of the interplanetary dust complex. Conjectures against this concept are usually based on comparison of the quantitative efficiency of the dust production by comets with the efficiency of all the dissipative processes involved.
openaire   +1 more source

Investigating Magnetosphere‐Ionosphere‐Thermosphere Coupling During Geomagnetic Storms With a Novel Thermospheric Disturbance Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract This study introduces a novel thermospheric disturbance index, JpT ${J}_{p}^{T}$, designed to describe density variations during geomagnetic storms. The index is constructed by applying the spectral whitening method to thermospheric density data derived from precise orbit determination of satellites from 2015 to 2019.
Yihan Wu, Tian Mao, Jing‐Song Wang, Xiao‐Wei Zhao, Zhou Chen, Ming‐Xian Zhao   +5 more
wiley   +1 more source

Mercury's Circumsolar Dust Ring as an Imprint of a Recent Impact

The Planetary Science Journal, 2023
A circumsolar dust ring has been recently discovered close to the orbit of Mercury. There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated from (1) the ...
Petr Pokorný, Ariel N. Deutsch, Marc J. Kuchner   +2 more
doaj   +1 more source

Sources of Interplanetary Dust [PDF]

International Astronomical Union Colloquium, 1996
AbstractAsteroids, comets and interstellar dust are possible sources of the particles that constitute the dust in the inner solar system. Each of these components gives rise to particular, characteristic features, the amplitudes of which can be used to estimate the size of the associated source.
S.F. Dermott, K. Grogan, B.Å.S. Gustafson, S. Jayaraman, S.J. Kortenkamp, Y.L. Xu   +5 more
openaire   +1 more source

Modeling the Delivery of Mercury's Polar Ice by a Volatile‐Rich Impact

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Permanently shadowed regions near Mercury's poles are thought to harbor significant deposits of water ice, the origin of which remains to be conclusively determined. One leading hypothesis is that most of the water observed today may have been delivered by a relatively recent, volatile‐rich impact comparable in scale and age to that which ...
Parvathy Prem, Nancy L. Chabot, Carolyn M. Ernst, Dana M. Hurley, David B. Goldstein, Jordan K. Steckloff   +5 more
wiley   +1 more source