Results 41 to 50 of about 239 (145)

COMetary dust TAIL Simulator (COMTAILS): A computer code to generate comet dust tail brightness images

Astronomy & Astrophysics
Context. We present the COMetary dust TAIL Simulator (COMTAILS), a numerical Monte Carlo code to generate images of dust tail brightness from comets and active asteroids in the Solar System. Aims. We describe a numerical code, available to interested users, capable of generating simulated images of dust tail brightness for comparison with observations,
openaire   +2 more sources

New evidence on the formation conditions of the Libyan Desert Glass (Western Egypt): Clues from a dendritic zircon inclusion

Meteoritics &Planetary Science, Volume 61, Issue 2, Page 272-284, February 2026.
Abstract Libyan Desert Glass (LDG) is an ~29 million years old, silica‐rich glass found in Western Egypt. Whether this glass formed in an impact cratering context associated with the hypervelocity collision of a cometary/asteroidal body or radiative heating during an airburst is debated. Determination of the formation temperatures and pressures of rare
Niccolò Magnani, Enrico Mugnaioli, Sofia Lorenzon, Lidia Pittarello, Tatiana E. Gorelik, Matteo Masotta, Luigi Folco   +6 more
wiley   +1 more source

Bimetallic Nanozyme Amplifier for Synergistic Ferroptosis‐Cuproptosis and Metabolic Reprogramming to Reshape Immunosuppressive Tumor Microenvironment

Advanced Science, Volume 13, Issue 1, 5 January 2026.
The Bimetallic Nanozyme Amplifier (PEG@AuCZ@CC) to maximize hydrogen peroxide production and reprogram tumor metabolism from glycolysis to oxidative phosphorylation. This shift enhances ferroptotic/cuproptotic signaling cascades and creates a glucose‐enriched but lactate‐depleted tumor microenvironment (TME), effectively overcoming immune tolerance in ...
Jianzhang Luo, Kunzhao Huang, Xiaoyuan Yi, Pei Lu, Huaying Xie, Wen Li, Qingyu Zeng, Feifei He, Duo Wang, Liyan Wang   +9 more
wiley   +1 more source

Two dust populations of particle fragments in the striated tail of Comet MRKOS 1957 V

The Astronomical Journal, 1982
The striated tail of Comet Mrkos 1957 V is investigated. The formation and motions of the striae are described by the same particle-fragmentation model that has been successfully applied to Comet West. Two new kinds of striae are discovered, one made of absorbing particles and the other of essentially nonabsorbing ones.
Z. Sekanina, J. A. Farrell
openaire   +1 more source

Dust shells and dark linear structures on dust tails of historical and recent long-period comets

Astronomy & Astrophysics
Context. Dust halos or shells, along with linear dark structures along the axes of dust tails, are commonly observed in many long- period comets near perihelion. Examples range from the recent C/2023 A3 (Tsuchinshan-ATLAS) to historical comets such as the Great Comet of 1874, C/1874 H1 (Coggia). Aims.
Fernando Moreno, Emmanuel Jehin
openaire   +2 more sources

Complex organosulfur molecules on comet 67P: Evidence from the ROSINA measurements and insights from laboratory simulations. [PDF]

Sci Adv, 2023
Mahjoub A, Altwegg K, Poston MJ, Rubin M, Hodyss R, Choukroun M, Ehlmann BL, Hänni N, Brown ME, Blacksberg J, Eiler JM, Hand KP.   +11 more
europepmc   +1 more source

THE DUST ENVIRONMENT OF COMET 29P/SCHWASSMANN-WACHMANN 1 FROM DUST TAIL MODELING OF 2004 NEAR-PERIHELION OBSERVATIONS

The Astrophysical Journal Supplement Series, 2009
A Monte Carlo inverse dust tail modeling of ground-based images of comet 29P/Schwasssmann-Wachmann 1 has been performed. The images of the comet were acquired on several nights in 2004 July, a few days after the 2004 perihelion passage. The analysis takes into account the rotation properties of the comet, incorporating dust ejection from active areas ...
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Exocomets size distribution in the [Formula: see text] Pictoris planetary system. [PDF]

Sci Rep, 2022
Lecavelier des Etangs A, Cros L, Hébrard G, Martioli E, Duquesnoy M, Kenworthy MA, Kiefer F, Lacour S, Lagrange AM, Meunier N, Vidal-Madjar A.   +10 more
europepmc   +1 more source

Synthesis of Autofluorescent Phenanthrene Microparticles via Emulsification: A Useful Synthetic Mimic for Polycyclic Aromatic Hydrocarbon-Based Cosmic Dust. [PDF]

ACS Appl Mater Interfaces, 2023
Chan DHH, Wills JL, Tandy JD, Burchell MJ, Wozniakiewicz PJ, Alesbrook LS, Armes SP.   +6 more
europepmc   +1 more source

The Plasma Environment of Comet 67P/Churyumov-Gerasimenko. [PDF]

Space Sci Rev, 2022
Goetz C, Behar E, Beth A, Bodewits D, Bromley S, Burch J, Deca J, Divin A, Eriksson AI, Feldman PD, Galand M, Gunell H, Henri P, Heritier K, Jones GH, Mandt KE, Nilsson H, Noonan JW, Odelstad E, Parker JW, Rubin M, Simon Wedlund C, Stephenson P, Taylor MGGT, Vigren E, Vines SK, Volwerk M.   +26 more
europepmc   +1 more source