Results 41 to 50 of about 1,351,986 (215)

A kinematical age for the interstellar object 1I/’Oumuamua [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
1I/'Oumuamua is the first interstellar object observed passing through the Solar System. Understanding the nature of these objects will provide crucial information about the formation and evolution of planetary systems, and the chemodynamical evolution of the Galaxy as a whole.
Almeida-Fernandes, F., Rocha-Pinto, H. J.   +1 more
openaire   +2 more sources

Predicting the water content of interstellar objects from galactic star formation histories [PDF]

, 2021
Planetesimals inevitably bear the signatures of their natal environment, preserving in their composition a record of the metallicity of their system's original gas and dust, albeit one altered by the formation processes.
J. Ted Mackereth, Michele T. Bannister, Lintott, Christopher, Bannister, Michele, Chris Lintott, Mackereth, Ted   +5 more
core   +1 more source

The Rich Chemistry of Ionized Methanol With Sulfur Dioxide: Pathways to Prebiotic and Elusive Species in Earth's Atmosphere and Space

Chemistry – A European Journal, EarlyView.
The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta, Daniele Catone, Mattea Carmen Castrovilli, Antonella Cartoni   +3 more
wiley   +1 more source

High spatial resolution galactic 3D extinction mapping with IPHAS [PDF]

, 2008
We present an algorithm (MEAD, for 'Mapping Extinction Against Distance') which will determine intrinsic (r' - i') colour, extinction, and distance for early-A to K4 stars extracted from the IPHAS r'/ i'/H alpha photometric data base.
R. A. H. Morris, Napiwotzki, Ralf, A. A. Zijlstra, Drew, J. E., Sale, Stuart E., J. E. Drew, N. A. Walton, Phillipps, S., Steeghs, D., P. J. Groot, Gaensicke, B. T., Unruh, Y.C., Morris, R.A.H., S. Phillipps, Groot, P., Sale, S.E., Sale, S. E., R. Napiwotzki, Drew, J.E., Morris, R. A H, M.J. Irwin, C. Knigge, Zijlstra, A.A., Napiwotzki, R., R. Greimel, Morris, R. A. H., Knigge, Christian, Groot, P.J., Gänsicke, B. T., A. Mampaso, Walton, N.A., Unruh, Y. C., Irwin, M. J., Mampaso, A., Knigge, C., Zijlstra, A. A.; id_orcid, Y. C. Unruh, Greimel, R., D. Steeghs, Irwin, M.J., Phillips, S., Gänsicke, B.T., Zijlstra, A. A., Groot, P. J., B. T. Gänsicke, Walton, N. A., Stuart E. Sale   +46 more
core   +2 more sources

Identifying Interstellar Object Impact Craters

The Planetary Science Journal, 2022
Abstract The discoveries of two interstellar objects (ISOs) in recent years have generated significant interest in constraining their physical properties and the mechanisms behind their formation. However, their ephemeral passages through our solar system permitted only incomplete characterization.
Samuel H. C. Cabot, Gregory Laughlin
openaire   +2 more sources

Size Matters: Barrier Heights and Widths in the Kinetics Of Tautomerisation and Rotamerisation of Thiotropolone and Its Five‐ and Three‐Membered Cyclic Analogues

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT Recent experiments by Nunes et al. have demonstrated that unprecedented control of chemical reactions is possible by narrowband infrared vibrational photo‐excitation at low temperatures in inert matrices. The generated higher energy level conformers may then undergo rotamerisation and tautomerisation reactions which provide extremely useful ...
Judith Wurmel, John M. Simmie
wiley   +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

Cis–Trans Rotational Isomerism of Formic Acid, Sulfur, and Selenium Analogues and Their Dimers: Chemical Kinetics Under Interstellar Conditions

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT We present chemical kinetic rate constants for the cis to trans isomerisation or rotamerization of monomeric seleno‐, thio‐, and formic acids and that of three of their dimeric species, based on variational transition state theory and multidimensional tunneling calculations in the gas‐phase, from 10 K to 300 K. These provide, firstly, reliable
Judith Wurmel, John M. Simmie
wiley   +1 more source

The formation of molecular hydrogen in the interstellar medium [PDF]

, 2010
H2 is the most abundant molecule in the interstellar medium and forms on the surface of interstellar dust grains. Laboratory studies have been conducted of HD formation on a dust grain analogue, which is a highly-oriented pyrolytic graphite surface ...
Islam, F.
core  

The Story(line) So Far: A Survey on Storyline Visualization

Computer Graphics Forum, EarlyView.
Abstract Storyline visualizations model narratives as temporal networks, using x‐monotone lines to represent entities and their interactions over time. This technique offers an intuitive way to reveal structural patterns over time, such as character co‐occurrence and narrative flow.
S. Di Bartolomeo, A. Dobler, V. Filipov, M. Nöllenburg, H. Ehlers   +4 more
wiley   +1 more source