Results 51 to 60 of about 296,727 (213)

Dust–dust collisions in cometary comas: applications to comet 67P/Churyumov–Gerasimenko

Monthly Notices of the Royal Astronomical Society
ABSTRACT Silica has emerged as a crucial component within inner comet comas. This work investigates silica dust aggregates and their interactions within cometary comas. We study the probability that aggregates in the size range 1–100 µm collide with each other in the coma and analyse the outcomes of such collisions by using the ...
María Belén Planes, M. G. Parisi, Emmanuel N. Millán, Eduardo M. Bringa, M. Cañada-Assandri   +4 more
openaire   +2 more sources

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

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.,, M. Morooka, M. Rubin, A. I. Eriksson, F. L. Johansson, E. Vigren, R. Marschall   +22 more
core   +2 more sources

Nonlinear interactive effects of temperature and soil moisture on plant biomass and carbon fluxes

Oikos, Volume 2026, Issue 11, November 2026.
Climate warming is affecting plant growth and CO2 fluxes in high‐latitude ecosystems. However, soil moisture – and how it responds to warming – can alter the shape of the relationship between temperature and both plant performance and ecosystem processes. We conducted a microcosm experiment to test the interactive effects of temperature, soil moisture,
Radim Šarlej, Aimée T. Classen, Sandra Jämtgård, Natalya Pya Arnqvist, Maja K. Sundqvist, David A. Wardle, Paul Kardol   +6 more
wiley   +1 more source

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

Activity-induced Near-infrared Spectral Variability at 29P/Schwassmann–Wachmann 1, 2017–2022

The Planetary Science Journal
29P/Schwassmann–Wachmann 1 (SW1) is both the first-discovered active Centaur and the most outburst-prone comet known. The nature of SW1’s many outbursts, which regularly brighten the comet by 5 mag or more, and what processes power them has been of ...
Theodore Kareta, Charles A. Schambeau, Megan Firgard, Yanga R. Fernández   +3 more
doaj   +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

Evaluating Harm Reduction Advice From Large Language Models

Drug and Alcohol Review, Volume 45, Issue 7, November 2026.
ABSTRACT Introduction Large language models (LLM) and generative Artificial Intelligence are increasingly providing health information. We have applied a novel method to evaluate the harm reduction information generated by popular LLMs. We focused on the filtration of oral medications for injection and the availability of local harm reduction services.
Khy Choo, Nathan Smith, Bernadette Ward, Robert M. Lundin   +3 more
wiley   +1 more source

Dust composition in the innermost coma of comet 67P from the VIRTIS-M spectra: Organic features detection [PDF]

, 2019
The Rosetta/ESA spacecraft followed the comet 67P/Churyumov-Gerasimenko from 2014 August (3.6 au pre-perihelion) to 2016 September (3.6 au post-perihelion).
Oliva, F., Tosi, F., Capaccioni, F., Taylor, F., Capria, M., Bockelee-Morvan, D., D'Aversa, E., Filacchione, G., Longobardo, A, Ciarniello, M., De Sanctis, M. C., Kappel, David, Raponi, A, Rinaldi, G.   +13 more
core   +1 more source

Detection and Quantification of Spreading Depolarization in Drosophila melanogaster Using High‐Throughput, Wide‐Field Brain Imaging

Current Protocols, Volume 6, Issue 10, October 2026.
Abstract Spreading depolarization (SD) is a ubiquitous neural phenomenon implicated in mammalian neurological disorders including cerebral ischemia, brain death, stroke, brain injury, and migraine, as well as in insect chill coma. During SD, a breakdown of ion homeostasis and a slowly spreading wave of neural depolarization leads to processing deficits,
Wolfgang Stein, Allison L. Harris
wiley   +1 more source