Results 61 to 70 of about 792,921 (206)

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

The ALMA-QUARKS Survey: Detection of Two Extremely Dense Substructures in a Massive Prestellar Core

The Astrophysical Journal Letters
Only a handful of massive starless core candidates have been discovered so far, but none of them have been fully confirmed. Within the MM1 clump in the filamentary infrared dark cloud G34.43+0.24 that was covered by the Atacama Large Millimeter ...
Xiaofeng Mai, Tie Liu, Xunchuan Liu, Lei Zhu, Guido Garay, Paul F. Goldsmith, Mika Juvela, Hongli Liu, Emma Mannfors, Anandmayee Tej, Patricio Sanhueza, Shanghuo Li, Fengwei Xu, Enrique Vazquez Semadeni, Wenyu Jiao, Yaping Peng, T. Baug, Aiyuan Yang, Lokesh Dewangan, Leonardo Bronfman, Gilberto C. Gómez, Aina Palau, Chang Won Lee, Sheng-Li Qin, Ken’ichi Tatematsu, James O. Chibueze, Dongting Yang, Xing Lu, Qiuyi Luo, Qilao Gu, Namitha Issac, Suinan Zhang, Pak-Shing Li, Bo Zhang, L. Viktor Tóth   +34 more
doaj   +1 more source

NEOMIR: ESA’s Space‐Based Infrared Mission for NEO Detection and Early Warning

Advances in Astronomy, Volume 2026, Issue 1, 2026.
The Near‐Earth Object Mission in the Infrared (NEOMIR) is European Space Agency’s (ESA’s) space‐based mission dedicated to discovering near‐Earth objects (NEOs). Its primary goal is to detect and provide early warnings for NEOs approaching Earth approaching from the near‐Sun direction, which are nearly impossible to observe using ground‐based optical ...
L. Conversi, J. Licandro, M. Delbo, A. Fitzsimmons, K. Muinonen, T. Müller, M. Popescu, P. Tanga, M. M. Revellino, M. Micheli, M. Fenucci, R. Moissl, Josep M. Trigo-Rodríguez   +12 more
wiley   +1 more source

The Impact of Hydrogen Atom Tunneling on Aromatic Chemistry in TMC-1

The Astrophysical Journal
Hydrogen atom tunneling likely plays a substantial role in the gas-phase chemistry of astrochemical environments. To determine the potential effect that it has on the chemical modeling of aromatic molecules, we screened both the kida.uva.2024 network and
Reace H. J. Willis, Thomas H. Speak, Alex N. Byrne, Christopher N. Shingledecker, Ilsa R. Cooke   +4 more
doaj   +1 more source

Turbulent diffusion and mixing in interstellar dark clouds with adsorption onto grains [PDF]

Astronomy & Astrophysics, 2003
This paper reports the results of models of dark cloud chemistry incorporating a depth dependent density distribution with diffusive mixing and adsorption onto grains. The model is based on the approach taken by Xie et al. (1995), with the addition of grain accretion effects.
Yate, C.J., Millar, TJ
openaire   +2 more sources

UV–Vis Spectra of Carbonic Acid: Rationalizing Experimental Redshifts between Monomer and Bulk based on (H2CO3)n Calculations

ChemPhysChem, Volume 26, Issue 18, September 19, 2025.
In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu, Bastian Klein, Chaojiang Zhang, Radu A. Talmazan, Thomas Loerting, Hinrich Grothe, Ralf I. Kaiser, Maren Podewitz   +7 more
wiley   +1 more source

Evolution of prolate molecular clouds at HII boundaries - I. formation of fragment-core structures [PDF]

, 2014
The evolution of a prolate cloud at an HII boundary is investigated using smoothed particle hydrodynamics. The prolate molecular clouds in our investigation are setwith their semi-major axis perpendicular to the radiative direction of a plane-parallel ...
Goodwin S, Goodwin, S., Miao, Jingqi, White GJ, Kinnear TM, Kinnear, T. M., White, G. J., Kinnear, T.M., Miao, J., Miao J, White, G.J.   +10 more
core   +1 more source

On the Existence, Rareness, and Uniqueness of Quenched H i-rich Galaxies in the Local Universe

The Astrophysical Journal
Using data from ALFALFA, xGASS, H i -MaNGA, and the Sloan Digital Sky Survey (SDSS), we identify a sample of 47 “red but H i -rich” (RR) galaxies with near-UV (NUV) − r > 5 and unusually high H i -to-stellar mass ratios. We compare the optical properties
Xiao Li, Cheng Li, H. J. Mo, Jianhong Hu, Jing Wang, Ting Xiao   +5 more
doaj   +1 more source

Radio observations of interstellar CN toward diffuse clouds, dark clouds, black clouds, and circumstellar clouds

The Astrophysical Journal, 1978
Emission at 113 GHz from the CN molecule has been searched for in a large number of interstellar regions, primarily dark dust clouds. Lines have been detected in four dark clouds, the first time CN has been observed in this type of object. Comparative CO observations were also performed.
M. Allen, G. R. Knapp
openaire   +1 more source

Simulating supernova feedback in galaxy disks [PDF]

, 2012
In this thesis I examine supernova feedback in hydrodynamical simulations of galaxy disks. Understanding this process entails the numerical evaluation of cooling in radiative shocks, and we present a set of simulations using two widely used numerical ...
CREASEY, PETER,EDWARD, Creasey, Peter Edward   +1 more
core