Results 71 to 80 of about 793,175 (240)

The Infrared Complex Refractive Index and Band Strengths of Coronene Thin Films

The Astrophysical Journal
Polycyclic aromatic hydrocarbon (PAH) molecules have long been theorized to be present in a multitude of interstellar environments. The radio-frequency detections of specific cyanosubstituted PAH molecules in the Taurus Molecular Cloud have provided new ...
J. E. Roser, L. Jovanović, A. Ricca
doaj   +1 more source

Cluster Models for Next‐Generation, Machine‐Learning‐Based Energy Functions for Molecular Simulations

Small Structures, Volume 7, Issue 2, February 2026.
This work describes how to conceive validated mixed machine learned/empirical energy functions based on finite‐sized molecular clusters for condensed phase simulations. Energy functions for pure and heterogeneous systems are one of the backbones for molecular simulation of condensed phase systems.
JingChun Wang, Meenu Upadhyay, Eric D. Boittier, Kham Lek Chaton, Valerii Andreichev, Mike Devereux, Raidel Martin Barrios, Shimoni Patel, Sena Aydin, Kai Töpfer, Markus Meuwly   +10 more
wiley   +1 more source

Features of Chemical-Element Abundances in Open Star Clusters of the Galaxy

Open Astronomy, 2016
On the basis of the authors’ compiled catalog containing spectroscopic abundances of 14 chemical elements for 90 open star clusters of the Galaxy, we show that in the young clusters not only barium but also three other studied elements of slow neutron ...
Marsakov V. A., Koval’ V. V., Gozha M. L., Shpigel’ L. V.   +3 more
doaj   +1 more source

Abundances and Depletions of Interstellar Oxygen [PDF]

The Astrophysical Journal, 2005
62 total pages (37 text), 15 figures, 9 ...
Jensen, Adam G., Rachford, Brian L., Snow, Theodore P.   +2 more
openaire   +2 more sources

Observation of interstellar lithium in the low-metallicity Small Magellanic Cloud

, 2012
The primordial abundances of light elements produced in the standard theory of Big Bang nucleosynthesis (BBN) depend only on the cosmic ratio of baryons to photons, a quantity inferred from observations of the microwave background.
AJ Korn, BD Fields, Brian D. Fields, D Romano, DC Knauth, DE Welty, DE Welty, DE Welty, DL Lambert, F Iocco, G Steigman, G Steigman, Grant J. Mathews, H Dekker, J Dunkley, J Meléndez, J. Christopher Howk, JC Weingartner, K Jedamzik, L Sbordone, M Asplund, M Pospelov, M Spite, N Prantzos, Nicolas Lehner, NLJ Cox, RH Cyburt, S Kawanomoto, SIB Cartledge, T Prodanović, TK Suzuki   +30 more
core   +1 more source

Interstellar Medium Abundances in Sculptor Group Dwarf Irregular Galaxies [PDF]

, 2002
Using the Cerro Tololo Inter-American Observatory 4 m telescope, we have obtained optical spectra of H II regions in five Sculptor group dwarf irregular galaxies. We derive oxygen, nitrogen, and sulfur abundances from the H II region spectra.
E. Skillman, S. Côté, B. Miller
semanticscholar   +1 more source

Sampling the volcanic plumes at Io: Impact speeds and shock conditions

Meteoritics &Planetary Science, Volume 61, Issue 2, Page 241-271, February 2026.
Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz   +2 more
wiley   +1 more source

Ice Age: Chemodynamical Modeling of Cha-MMS1 to Predict New Solid-phase Species for Detection with JWST

The Astrophysical Journal, 2022
Chemical models and experiments indicate that interstellar dust grains and their ice mantles play an important role in the production of complex organic molecules (COMs).
Miwha Jin, Ka Ho Lam, Melissa K. McClure, Jeroen Terwisscha van Scheltinga, Zhi-Yun Li, Adwin Boogert, Eric Herbst, Shane W. Davis, Robin T. Garrod   +8 more
doaj   +1 more source

The Abundance of Interstellar Boron

The Astrophysical Journal, 2000
Accepted for publication in The Astrophysical Journal. 13 pages, including 2 tables and 4 figures. Also available at http://fuse.pha.jhu.edu/~howk/Papers/
Howk, J. Christopher, Sembach, Kenneth R., Savage, Blair D.   +2 more
openaire   +2 more sources

Abundances of lithium, sodium, and potassium in Vega

, 2008
Vega's photospheric abundances of Li, Na, and K were determined by using considerably weak lines measured on the very high-S/N spectrum, while the non-LTE correction and the gravity-darkening correction were adequately taken into account.
Adelman, Andrievsky, Aufdenberg, Baschek, Burkhart, Castelli, Cayrel, Coupry, Gerbaldi, Grevesse, Gulliver, Holweger, Hunger, Ilijić, Kamp, Paunzen, Paunzen, Peterson, Przybilla, Qiu, Saffe, Savage, Strom, Stürenburg, Takada-Hidai, Takeda, Takeda, Takeda, Takeda, Takeda, Takeda, Y. Takeda   +31 more
core   +1 more source