Results 61 to 70 of about 668,448 (162)

Influence of galactic arm scale dynamics on the molecular composition of the cold and dense ISM I. Observed abundance gradients in dense clouds [PDF]

, 2018
International audienceAims. We study the effect of large scale dynamics on the molecular composition of the dense interstellar medium during the transition between diffuse to dense clouds. Methods. We followed the formation of dense clouds (on sub-parsec
Wakelam, Valentine, M. Ruaud, Gratier, P., P. Gratier, Wakelam, V., V. Wakelam, Bonnell, I. A., Ruaud, M., I. A. Bonnell   +8 more
core   +1 more source

Energetic secondary electrons in dense interstellar clouds

The Astrophysical Journal, 1977
We have calculated the steady-state distribution of secondary electrons in dense interstellar clouds that are produced in collisions between primary cosmic rays and thermal gas atoms. We find that if the magnetic field in such clouds is approx.100 microgauss, then the synchrotron volume emissivity in the clouds is sufficiently large that discrete ...
R. L. Brown, A. P. Marscher
openaire   +1 more source

Advancing Heliophysics and Space Weather Modeling Through Open Science

Space Weather, Volume 24, Issue 6, June 2026.
Abstract We present a community‐wide effort to develop a strategy and action plan to advance heliophysics and space weather modeling through open science. While open science has the potential to enhance the quality and pace of scientific discovery, its application to scientific modeling requires more careful consideration regarding open data and open ...
C. Corti, M. M. Kuznetsova, M. A. Reiss, J. Yue, J. Karpen, C. N. Arge, F. Bacchini, C. Bard, S. Bruinsma, R. M. Caplan, L. K. S. Daldorff, P. J. Deka, C. R. DeVore, S. Elvidge, N. Ganushkina, J. D. Huba, B. V. Jackson, V. Jordanova, J. A. Linker, H. Liu, J. G. Luhmann, S. Markidis, P. Mayank, V. Merkin, N. Moens, D. Odstrcil, Y. A. Omelchenko, M. Palmroth, S. Poedts, A. J. Ridley, Y. Shou, V. Tenishev, D. R. Themens, G. Toth, W. Wang, R.‐P. Wilhelm, M. A. Young, B. Cecconi, M.‐Y. Chou, D. De Zeeuw, G. L. Delzanno, C. Didigu, M. El Alaoui, S. Fung, J. Green, Z. Huang, L. K. Jian, L. J. Landwer, M. Lesko, P. MacNeice, A. Masson, M. L. Mays, P. M. Mehta, M. S. Miesch, E. Palmerio, M. Petrenko, E. Provornikova, L. Rastätter, L. Rusaitis, N. Sachdeva, E. Samara, D. Sur, A. Taktakishvili, J. Topper, T. Tsui, C. Verbeke, J. Wang, C. Wiegand, M. Wiltberger, Y. Zheng, M. M. Bisi, M. K. Georgoulis, T. Kodikara, T. Pulkkinen, A. Chartier, D. da Silva, A. Faturahman, K. Garcia‐Sage, D. Kondrashov, V. E. Ledvina, W. Liu, C. Pandey, E. Resnick, C. Shi, R. S. Weigel, K. Whitman, I. Zakharenkova, K. Zhang   +87 more
wiley   +1 more source

Interstellar deuterium in cold dense clouds

The Astrophysical Journal, 1993
The mechanism for deuterium fractionation in interstellar clouds is considered within the boundaries of the theory of Dalgarno & Lepp. The abundance of D atoms and fractional ionization in cold clouds are derived from the observational data of molecular ions.
openaire   +1 more source

The Role of Benzonitrile Chlorination Explored by Dissociative Electron Attachment

ChemPhysChem, Volume 27, Issue 9, 14 May 2026.
Experimental and theoretical dissociative electron attachment study of 2‐ and 4‐chlorobenzonitrile. The dissociative electron attachment process to ortho‐ and para‐chlorobenzonitrile was investigated in the 0–12 eV energy range with a crossed‐beam time‐of‐flight mass spectrometer, supported by quantum chemical scattering calculations.
Pedro Guerra, Mónica Mendes, Ely G. F. de Miranda, Rodrigo Rodrigues, Lucas M. Cornetta, Filipe Ferreira da Silva   +5 more
wiley   +1 more source

Encounters between stars and dense interstellar clouds

The Astrophysical Journal Supplement Series, 1977
From analysis of statistics of the properties of dense interstellar clouds, we show that a disk star the age of the Sun has probably passed through about 135 clouds of n (H) > or approx. =10/sup 2/ cm/sup -3/ and about 16 clouds with n (H) > or approx. =10/sup 3/ cm/sup -3/.
R. J., Jr. Talbot, M. J. Newman
openaire   +1 more source

Structure and Spectroscopy of Criegee Intermediates in Gas‐ and Aqueous Environments

Helvetica Chimica Acta, Volume 109, Issue 5, May 2026.
ABSTRACT The dynamics and spectroscopy of the small (H2COO) and large (CH3CHOO) Criegee intermediates (CIs) in the gas phase, inside/on water droplets, on amorphous solid water (ASW) and in bulk water are investigated using validated energy functions.
Cangtao Yin, Meenu Upadhyay, Markus Meuwly   +2 more
wiley   +1 more source

Physical conditions in CaFe interstellar clouds

, 2007
Interstellar clouds that exhibit strong Ca 
P. Gnaciński, M. Krogulec
core   +1 more source

Coevolution of Giant Molecular Clouds, Filaments, and Clumps as a Function of the Dense Gas Mass Fraction

The Astrophysical Journal Supplement Series
We investigate the evolutionary dynamics with archival continuum and line data of 27 giant molecular clouds (GMCs) in the Milky Way, focusing on their influence on star formation. Examining the dense gas mass fraction (DGMF) among the GMCs, we categorize
Wenjun Zhang, Jianjun Zhou, Jarken Esimbek, Willem Baan, Xindi Tang, Dalei Li, Yuxin He, Gang Wu, Dongdong Zhou, Yingxiu Ma, Kadirya Tursun, Weiguang Ji, Zhengxue Chang, Jiasheng Li, Toktarkhan Komesh   +14 more
doaj   +1 more source

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

Systems Research and Behavioral Science, Volume 43, Issue 3, Page 1212-1228, May/June 2026.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source