Results 71 to 80 of about 54,240 (242)

Interstellar Migration, the Population ‘Problem’ and the Climate Emergency

Critical Quarterly, EarlyView.
Anna Hartnell
wiley   +1 more source

Enhanced cosmic-ray flux toward zeta Persei inferred from laboratory study of H3+ - e- recombination rate

, 2003
The H3+ molecular ion plays a fundamental role in interstellar chemistry, as it initiates a network of chemical reactions that produce many interstellar molecules. In dense clouds, the H3+ abundance is understood using a simple chemical model, from which
A. Al-Khalili, A. Ehlerding, A. J. Huneycutt, A. Neau, AE Orel, B. J. McCall, BD Savage, BJ McCall, BJ McCall, BJ McCall, CM Lindsay, D Strasser, E Herbst, EF van Dishoeck, F. Hellberg, F. Österdahl, G Sundström, G. H. Dunn, H Kreckel, IF Schneider, J. Semaniak, JA Cardelli, JB Paul, M Larsson, M. Larsson, MJ Jensen, N. Djuric, O. Novotny, R Plasil, R. J. Saykally, R. Thomas, RC Bohlin, S Lepp, S. Kalhori, SL Guberman, T Tanabe, T. R. Geballe, TR Geballe, TR Geballe, V Kokoouline, WD Watson   +40 more
core   +1 more source

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +1 more source

Aditional Ultra-High-Resolution Observations of Ca+ Ions in the Local Insterstellar Medium [PDF]

, 1998
We present ultra-high-resolution (0.35 km s−1 FWHM) observations of the interstellar Ca K line towards seven nearby stars. The spectral resolution was sufficient to resolve the line profiles fully, thereby enabling us to detect hitherto unresolved ...
Crawford, IA, Lallement, R, Welsh, BY
core  

The Local Leo Cold Cloud and New Limits on a Local Hot Bubble

, 2011
We present a multi-wavelength study of the local Leo cold cloud (LLCC), a very nearby, very cold cloud in the interstellar medium. Through stellar absorption studies we find that the LLCC is between 11.3 pc and 24.3 pc away, making it the closest known ...
Carl Heiles, Crovisier, David M. Meyer, Haslam, Heiles, Heitsch, J. E. G. Peek, J. T. Lauroesch, Kathryn M. G. Peek, Koutroumpa, Kuntz, Kuntz, Lauroesch, Lisse, Meyer, Miville-Deschênes, Nidever, Peek, Peek, Redfield, Redfield, Schlegel, Sfeir, Snowden, Trümper, van Leeuwen, Verschuur, Vázquez-Semadeni, Wolfire   +28 more
core   +1 more source

Correlation Patterns of Muon Flux With Vertical Atmospheric Profiles: Insights From Monte Carlo Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The production, attenuation, and absorption of secondary cosmic rays (SCR) are influenced by atmospheric parameters such as air pressure and temperature. To reliably correlate SCR flux measurements with atmospheric ionization driven by energetic particle precipitation, these dependencies must be quantified.
A. Al‐Qaaod, V. Pierrard, A. Winant, U. Stolzenberg, I. Ambrozova, M. Sommer, J. Slegl, J. Solc, A. Gkikoudi, A. G. Georgakilas, A. Papayannis, F. S. Krasniqi   +11 more
wiley   +1 more source

Formation of All Three C2H4O Isomers—Ethylene Oxide (c-C2H4O), Acetaldehyde (CH3CHO), and Vinyl Alcohol (CH2CHOH)—in Ethanol-containing Interstellar Analog Ices

The Astrophysical Journal
Oxygen-containing complex organic molecules are key precursors to biorelevant compounds fundamental for the origins of life. However, the untangling of their interstellar formation mechanisms has just scratched the surface, especially for oxygen ...
Jia Wang, Chaojiang Zhang, Joshua H. Marks, Ralf I. Kaiser   +3 more
doaj   +1 more source

Gas stripping by radiation drag from an interstellar cloud

, 2004
We perform two-dimensional hydrodynamic simulation on the gas stripping by radiation drag from an interstellar cloud moving in uniform radiation fields.
Ferrarese, Ferrarese, Fortner, Fukue, Fukue, Fukue, Gebhardt, Gebhardt, Ho, Jun'ichi Sato, Kawakatu, Kawakatu, Kawakatu, Keisuke Sawada, Kormendy, Kormendy, Lamb, Laor, Loeb, Magorrian, Masayuki Umemura, McLure, McLure, Merrifield, Merritt, Merritt, Meyer, Mihalas, Miller, Mineshige, Miyoshi, Mori, Nakahashi, Nelson, Ohsuga, Poynting, Richstone, Robertson, Salucci, Sarzi, Shingo Matsuyama, Tsuribe, Tsuribe, Umemura, Umemura, Umemura, Umemura, Umemura, Wandel, Wandel   +49 more
core   +1 more source

Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley   +1 more source

Submillimeterwave Spectroscopy of and Interstellar Search for Nitrosomethane: CH3NO

The Astrophysical Journal
New measurements of nitrosomethane (CH _3 NO), a formamide isomer, were done up to 660 GHz. The molecule exhibits internal rotation motion from the CH _3 group, and therefore the analysis with a dedicated rho-axis method code, RAM36, was used. A total of
Laurent Margulès, Zachary T. P. Fried, Alex N. Byrne, Brett A. McGuire, Luyao Zou, Roman A. Motiyenko, J.-C. Guillemin   +6 more
doaj   +1 more source