Results 71 to 80 of about 36,044 (198)

Photodissociation in proto-planetary nebulae. Hydrodynamical simulations and solutions for low-velocity multi-lobes

, 2010
We explore the effects of photodissociation at the stages of post-asymptotic giant branch stars to find a mechanism able to produce multi-polar shapes. We perform two-dimensional gasdynamical simulations to model the effects of photodissociation in proto-
Abgrall, Balick, Bjorkman, Blöcker, Bodenheimer, Chita, Chu, Clarke, Dalgarno, Diaz-Miller, Draine, Dwarkadas, Franco, Frank, G. García-Segura, García-Segura, García-Segura, García-Segura, García-Segura, Giuliani, Heger, Henney, Hollenbach, Icke, Icke, Icke, Kwok, Langer, Latter, Livio, Mac Low, MacDonald, Manchado, Matt, Mellema, Natta, Rijkhorst, Rózyczka, Sahai, Sahai, Sahai, Schwarz, Soker, Stanghellini, Stanghellini, Stone, Tenorio-Tagle, Vassiliadis, Villaver, Vishniac, Whalen, Williams   +51 more
core   +1 more source

Single and Double Photoionization and Photodissociation of Toluene by Soft X-rays in Circumstellar Environment [PDF]

, 2016
The formation of polycyclic aromatic hydrocarbons (PAHs) and their methyl derivatives occurs mainly in the dust shells of asymptotic giant branch (AGB) stars.
Boechat-Roberty, H. M., Fantuzzi, F., Monfredini, T., Nascimento, M. A. C., Wolff, W.   +4 more
core   +2 more sources

Comprehensive Characterization of Water Group Ion Composition and Distributions in Saturn's Magnetosphere With Cassini Plasma Spectrometer Data

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Saturn's magnetosphere is continuously supplied with neutrals from the Enceladus plume and the icy rings, which undergo ionization and charge‐exchange to form a complex water‐group plasma environment. While the Cassini Plasma Spectrometer (CAPS) instrument has provided extensive compositional information, detailed separation of individual ...
Thomas K. Kim, D. B. Reisenfeld, R. J. Wilson, H. T. Smith, A. K. Woodson, F. Allegrini, R. W. Ebert, M. G. Henderson, P. K. Kollmann, G. Livadiotis, G. Nicolaou, J. R. Szalay, P. W. Valek, A. Masters   +13 more
wiley   +1 more source

Dust processing in photodissociation regions - Mid-IR emission modelling

, 2008
Mid-infrared spectroscopy of dense illuminated ridges (or photodissociation regions, PDRs) suggests dust evolution. Such evolution must be reflected in the gas physical properties through processes like photo-electric heating or H_2 formation.
A. Abergel, Abergel, Abergel, Abergel, Abergel, Allers, Anthony-Twarog, Arendt, Barnard, Berné, Bohlin, Boulanger, Boulanger, Boulanger, Burgh, Cardelli, Castor, Cesarsky, Clayton, Compiègne, Dartois, Dartois, Draine, Draine, Draine, Draine, Désert, E. Habart, Field, Fitzpatrick, Fitzpatrick, Fitzpatrick, Flagey, Freyer, Gatley, Giard, Goicoechea, Habart, Habart, Habart, Habing, Henyey, Hily-Blant, Hollenbach, Houck, Joblin, Johnstone, Jones, Jones, Jones, Kelsall, Kim, L. Verstraete, Laor, Laureijs, Li, M. Compiègne, Mathis, Mathis, Mathis, Miville-Deschênes, Pech, Peeters, Peeters, Perryman, Pety, Pety, Philipp, Pound, Rapacioli, Savage, Schaerer, Schiminovich, Schutte, Sellgren, Smith, Stepnik, Teyssier, Thronson, Verstraete, Verstraete, Ward-Thompson, Warren, Weingartner, Weingartner, Werner, Werner, Witt, Witt, Zubko   +89 more
core   +1 more source

Destruction of Refractory Carbon in Protoplanetary Disks [PDF]

, 2017
The Earth and other rocky bodies in the inner solar system contain significantly less carbon than the primordial materials that seeded their formation. These carbon-poor objects include the parent bodies of primitive meteorites, suggesting that at least ...
Anderson, Dana E., Bergin, Edwin A., Blake, Geoffrey A., Ciesla, Fred J., Lee, Jeong-Eun, Visser, Ruud   +5 more
core   +3 more sources

Impact of Solar Irradiance on Storm‐Time Thermospheric Mass Density Response

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract As a key parameter in the externally forced ionosphere–thermosphere (IT) system, mass density response to storms is affected by the prevailing solar irradiance. To better understand this relationship, we examine mass density responses to the same storm but with different background solar irradiance levels.
Simin Zhang, Liying Qian, Nicholas Pedatella, Eric Sutton, Noah Peterson, Thomas Berger   +5 more
wiley   +1 more source

Deuteron Photodissociation in Ultraperipheral Relativistic Heavy-Ion on Deuteron Collisions

, 2003
In ultraperipheral relativistic deuteron on heavy-ion collisions, a photon emitted from the heavy nucleus may dissociate the deuterium ion. We find deuterium breakup cross sections of 1.38 barns for deuterium-gold collisions at a center of mass energy of
A. Trzcinska, A.E. Thorlacius, A.I. Akhieser, A.J. Baltz, A.J. Buchmann, C. Adler, C. Adler, C.A. Barnes, C.W. deJager, F. Krauss, G. Baur, G. Baur, M. Chiu, M.L. Rustgi, P. Rossi, R. Bernabei, R. Glauber, R. Moreh, Ramona Vogt, S. Klein, S.J. Brodsky, Spencer Klein, Y. Birenbaum   +22 more
core   +5 more sources

First Principles Rovibronic Absorption Spectra of HF Molecule

Journal of Computational Chemistry, Volume 47, Issue 6, March 5, 2026.
Hydrogen fluoride (HF) is astrophysically important, as it has been detected in sunspots, Venus, red giants, and the interstellar medium, serving as a probe of exoplanet atmospheres. This article presents an ab initio investigation of HF rovibronic spectroscopy, combining high‐level electronic‐structure data with nuclear‐motion solutions and refinement
Nariman Abu El Kher, Maha Shibli, Mahmoud Korek, Sergei N. Yurchenko, Jonathan Tennyson, Nayla El‐Kork   +5 more
wiley   +1 more source

Simulating cold atomic hydrogen production in linear radiofrequency ion traps

New Journal of Physics
We simulated the motion of ${\mathrm{BaH^{+}}}$ molecular ions which are sympathetically cooled by laser-cooled ${\mathrm{Ba^{+}}}$ ions in linear quadrupole and octupole radiofrequency (RF) ion traps.
Nikita Poljakov, Muhammed Sameed, Steven Armstrong Jones   +2 more
doaj   +1 more source

Ultrasonic–Laser Hybrid Treatment for Cleaning Gasoline Engine Exhaust: An Experimental Study

Vehicles
Vehicle exhaust gases remain one of the key sources of atmospheric air pollution and pose a serious threat to ecosystems and public health. This study presents an experimental investigation into reducing the toxicity of gasoline internal combustion ...
Bauyrzhan Sarsembekov, Madi Issabayev, Nursultan Zharkenov, Altynbek Kaukarov, Isatai Utebayev, Akhmet Murzagaliyev, Baurzhan Zhamanbayev   +6 more
doaj   +1 more source