Results 51 to 60 of about 4,285 (205)

From a Different Star: 3I/ATLAS in the Context of the Ōtautahi–Oxford Interstellar Object Population Model

The Astrophysical Journal Letters
The discovery of the third interstellar object (ISO), 3I/ATLAS (“3I”), provides a rare chance to directly observe a small body from another solar system.
Matthew J. Hopkins, Rosemary C. Dorsey, John C. Forbes, Michele T. Bannister, Chris J. Lintott, Brayden Leicester   +5 more
doaj   +1 more source

Interstellar Objects from Broken Dyson Spheres

Research Notes of the AAS, 2023
Abstract Without extensive maintenance, Dyson spheres inevitably disintegrate by asteroid impacts over billions of years. The resulting fragments would appear as anomalous interstellar objects, potentially sharing the unusual shape and motion of 1I/‘Oumuamua or the unusual material strength of the first two interstellar meteors, IM1 and ...
openaire   +2 more sources

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

A Portrait throughout Perihelion of the NH2-rich Interstellar Comet 2I/Borisov

The Planetary Science Journal
The interstellar comet 2I/Borisov is the first interstellar object where compositional characterisation was possible throughout its entire perihelion passage.
Sophie E. Deam, Michele T. Bannister, Cyrielle Opitom, Matthew M. Knight, Léa Ferellec, Ryan Ridden-Harper, Darryl Z. Seligman, Alan Fitzsimmons, Aurélie Guilbert-Lepoutre, Emmanuel Jehin, Laurent Jorda, Michael Marsset, Youssef Moulane, Philippe Rousselot, Pierre Vernazza, Bin Yang   +15 more
doaj   +1 more source

Observable tests for the light-sail scenario of interstellar objects

, 2022
Context. Enigmatic dynamical and spectral properties of the first interstellar object (ISO), 1I/2017 U1 (Oumuamua), led to many hypotheses, including a suggestion that it may be an “artificial” spacecraft with a thin radiation-pressure-driven light sail.
Shang-Fei Liu, Douglas N. C. Lin, Wen-Han Zhou, Yun Zhang   +3 more
core   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source

Spectroscopic Characterization of Interstellar Object 3I/ATLAS: Water Ice in the Coma

The Astrophysical Journal Letters
We present optical and near-infrared spectroscopy of the interstellar object 3I/ATLAS, obtained with Gemini-S/GMOS and NASA IRTF/SpeX on 2025 July 5 and 14.
Bin Yang, Karen J. Meech, Michael Connelley, Ruining Zhao, Jacqueline V. Keane   +4 more
doaj   +1 more source

Energy Landscapes in Chemical Reactions and Transport

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Kinetics/dynamics of chemical reactivity and transport of chemical species in a solid are both determined by the energy landscape in which they take place. Discussing common grounds but also distinct differences may help in advancing the understanding in both fields.
Karl‐Michael Weitzel
wiley   +1 more source

Intercepting Interstellar Objects

White paper submitted to the UK Space Frontiers 2035 prioritisation ...
Snodgrass, Colin, Galand, Marina, Beth, Arnaud, Goetz, Charlotte, Donaldson, Abbie, Opitom, Cyrielle   +5 more
openaire   +2 more sources

Chemical Kinetics of 2‐, 4‐, and 2,4‐Seleno‐Uracils at Low Temperatures: Tautomerizations and Rotamerizations on Inert Matrices

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT In the interstellar medium, chemical reactions proceed under conditions vastly different to those on Earth; these include extremely low temperatures and densities and take place in the gas phase and on water–ice grains. Understanding the energetics and more importantly the kinetics of such reactions is of relevance to the consequences on how ...
Judith Wurmel, John M. Simmie
wiley   +1 more source