Results 31 to 40 of about 73,704 (164)

Characterizing circumstellar disk around young stars [PDF]

, 2010
The circumstellar disks play a fundamental role in star and planet formation process. Studies on circumstellar disks are generally carried on following two viable approaches: "statistical" studies, where a large samples of sources are measured to ...
Schisano, Eugenio
core   +1 more source

Evolution of PAHs in Protoplanetary Disks [PDF]

EAS Publications Series, 2011
Depending on whom you ask, PAHs are either the smallest dust particles or the largest gas-phase molecules in space. Whether referred to as gas or dust, these PAHs can contain up to 20% of the total cosmic carbon abundance and as such also play an important role in the carbon chemistry of protoplanetary disks.
openaire   +3 more sources

Consistent dust and gas models for protoplanetary disks [PDF]

Astronomy & Astrophysics, 2019
Context. Consistent modeling of protoplanetary disks requires the simultaneous solution of both continuum and line radiative transfer, heating and cooling balance between dust and gas and, of course, chemistry. Such models depend on panchromatic observations that can provide a complete description of the physical and chemical properties and energy ...
Dionatos, O., Woitke, P., Güdel, M., Degroote, P., Liebhart, A., Anthonioz, F., Antonellini, S., Baldovin-Saavedra, C., Carmona, A., Dominik, C., Greaves, J., Ilee, J. D., Kamp, I., Ménard, F., Min, M., Pinte, C., Rab, C., Rigon, L., Thi, W. F., Waters, L. B. F. M.   +19 more
openaire   +11 more sources

The Rich Chemistry of Ionized Methanol With Sulfur Dioxide: Pathways to Prebiotic and Elusive Species in Earth's Atmosphere and Space

Chemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.
The reaction between the methanol radical cation and sulfur dioxide is remarkably fast and forms several ionic and neutral products (HOSOH+, CH2OSO+, CH2OH+, CH2O, H2O, HSO2). The chemistry goes beyond simple proton or hydrogen transfer, revealing a close interaction between the two species, relevant to atmospheric and astrochemical environments where ...
Mauro Satta, Daniele Catone, Mattea Carmen Castrovilli, Antonella Cartoni   +3 more
wiley   +1 more source

Oxygen isotope variability in the IIIAB iron meteorites and their relationship to main group pallasites

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2393-2405, September 2026.
Abstract The light element distribution in planetary cores and the processes driving core evolution in rocky planets are poorly understood. Magmatic iron meteorites are samples from the cores of ancient embryonic planetesimals and therefore provide a window into the processes governing core evolution. We performed high precision oxygen isotope analyses
R. J. Windmill, I. A. Franchi, X. Zhao, R. C. Greenwood, M. Anand   +4 more
wiley   +1 more source

Resonant Relaxation in Protoplanetary Disks [PDF]

The Astronomical Journal, 1998
19 pages, 1 figure, LaTeX, submitted to ...
openaire   +2 more sources

The role of cosmic rays in protoplanetary disks and exoplanets

, 2021
Poster on the impact of cosmic rays in protoplanetary disks and ...
Rodgers-Lee, D., Vidotto, A., Downes, T., Ray, T., Taylor, A.   +4 more
core   +1 more source

Structural Evolution of Antigorite by High‐Velocity Impacts

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract Serpentine is a major hydrous mineral present in hydrous asteroids that have evolved through planetary impacts. Understanding its dynamic behavior is essential to elucidate the redistribution and retention of water during high‐velocity impact processes. The shock response of antigorite was examined at pressures up to 106 GPa using laser‐driven
Yuhei Umeda, Yusuke Seto, Naotaka Tomioka, Hiroshi Arima‐Osonoi, Yoichiro Hironaka, Yuichi Inubushi, Kento Katagiri, Ryosuke Kodama, Kohei Miyanishi, Hirotaka Nakamura, Norimasa Ozaki, Tomoko Sato, Keiichi Sueda, Tadashi Togashi, Toshinori Yabuuchi, Makina Yabashi, Toshimori Sekine, Takuo Okuchi   +17 more
wiley   +1 more source

Gas Evolution in Protoplanetary Disks [PDF]

, 2009
This article summarizes a Splinter Session at the Cool Stars XV conference in St. Andrews with 3 review and 4 contributed talks. The speakers have discussed various approaches to understand the structure and evolution of the gas component in ...
Alexander, Richard, Roberge, Aki, Rice, Ken, Sicilia-Aguilar, Aurora, Pascucci, Ilaria, Thi, Wing-Fai, Kamp, Inga, Woitke, Peter, Williams, Jonathan, Brown, Joanna, Dent, Bill, Sibthorpe, Bruce   +11 more
core   +4 more sources

Thermal histories of El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155): Implications for the diversity of IAB‐ungrouped iron meteorites and their parent bodies

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1763-1787, August 2026.
Abstract This study provides the first petrographic, crystallographic, and chemical comparison between El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155), two particular IAB‐ungrouped iron meteorites. Both contain exceptionally large graphite nodules and “flowers”, providing unique insights into carbon behavior in metallic melts and cooling ...
L. Perez, M. Roskosz, F. Danoix, L. Kern, V. Megevand, C. Brillatz, B. Devouard, J. Gattacceca, M. Gounelle   +8 more
wiley   +1 more source