Results 101 to 110 of about 823,770 (310)

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

Physical Properties of Giant Molecular Clouds in the Large Magellanic Cloud [PDF]

, 2010
The Magellanic Mopra Assessment (MAGMA) is a high angular resolution CO mapping survey of giant molecular clouds (GMCs) in the Large and Small Magellanic Clouds using the Mopra Telescope. Here we report on the basic physical properties of 125 GMCs in the
A. Hughes, A. Kawamura, Akritas, Alves, Babu, Ballesteros-Paredes, Ballesteros-Paredes, Bergin, Bernard, Blanc, Blitz, Blitz, Blitz, Blitz, Bolatto, Bolatto, Boulanger, Chieze, Chin, Cole, D. Paradis, Dickey, Dickman, Dobashi, E. Muller, Elmegreen, Federman, Fleck, Fukui, Garay, Gaustad, Hartmann, Heikkilä, Heyer, Heyer, Heyer, Israel, Israel, Israel, Israel, J. L. Pineda, J. Ott, J.-P. Bernard, Johansson, Kawamura, Kelly, Kim, Kim, Krumholz, Krumholz, Kutner, L. Staveley-Smith, Ladd, Larson, Larson, Lequeux, Leroy, Leroy, Leroy, Luks, M. Meixner, Mac Low, MacLaren, Maloney, Marx-Zimmer, McKee, Meixner, Minamidani, Miville-Deschênes, Mizuno, Moorey, Muller, N. Mizuno, Nikolaev, Nikolaev, Ott, Paradis, Pineda, Pineda, Press, Rosolowsky, Rosolowsky, Rosolowsky, Rosolowsky, S. Kim, S. Maddison, Sault, Skrutskie, Solomon, Sorai, Staveley-Smith, Strong, T. Onishi, T. Wong, Tasker, Tremaine, Van Der Marel, Van Dishoeck, W. T. Reach, Walter, Williams, Williams, Wilson, Wolfire, Wong, Wong, Y. Fukui, Y. Mizuno, Yang, Zhao   +109 more
core   +3 more sources

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Matrix Isolation and Solvation of the Benzonitrile Radical Anion

Chemistry – A European Journal, Volume 31, Issue 35, June 23, 2025.
Hydrated electrons are potent reducing agents that may play significant roles in chemical evolution within astrochemical and prebiotic environments. Benzonitrile, a molecule present in the interstellar medium (ISM), can capture electrons in amorphous water ice at cryogenic temperatures, forming a radical anion.
Shubhra Sarkar, Ankit Somani, Wolfram Sander   +2 more
wiley   +1 more source

A Modern Look at ‘Interstellar Clouds’ [PDF]

Symposium - International Astronomical Union, 1974
We compare past and present modes of investigation of the structure of the interstellar gas. Many aspects of the interstellar cloud model are invalid.Interstellar optical absorption lines and Hi21-cm emission lines show a number of very large aggregates with properties similar to those of ‘cloud complexes’. At nonzero velocities especially for b<0°,
openaire   +2 more sources

Boron abundances in diffuse interstellar clouds [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe present a comprehensive survey of B abundances in diffuse interstellar clouds from HST/STIS observations along 56 Galactic sight lines. Our sample is the result of a complete search of archival STIS data for the B II λ1362 resonance line, with each detection confirmed by the presence of absorption from other dominant ions at the same ...
David L. Lambert, Y. Sheffer, S. R. Federman, Adam M. Ritchey   +3 more
openaire   +3 more sources

The Structure of the Local Interstellar Medium. VII. Additional New Mg ii, Fe ii, and Mn ii Observations toward Stars within 100 pc

The Astrophysical Journal
We present new high-resolution ( R  ∼ 114,000), near-ultraviolet spectra in the direction of 36 nearby (
Azmain H. Nisak, Seth Redfield, Jeffrey L. Linsky, Brian E. Wood, Allison Youngblood   +4 more
doaj   +1 more source

Anomalous diffusion of cosmic rays: A geometric approach

AIP Advances, 2021
In this work, we analyze the process leading to the occurrence of anomalous transport phenomena associated with galactic cosmic rays propagating through the interstellar space.
Salvatore Buonocore, Mihir Sen
doaj   +1 more source

Local Interstellar Medium Kinematics towards the Southern Coalsack and Chamaeleon-Musca dark clouds

, 2003
The results of a spectroscopic programme aiming to investigate the kinematics of the local interstellar medium components towards the Southern Coalsack and Chamaeleon-Musca dark clouds are presented. The analysis is based upon high-resolution (R ~ 60,000)
G. A. P. Franco, J. Knude, SNOWDEN, W. J. B. Corradi   +3 more
core   +3 more sources

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source