Results 51 to 60 of about 36,246 (179)

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Applying laboratory thermal desorption data in an interstellar context: sublimation of methanol thin films [PDF]

, 2009
Methods by which experimental measurements of thermal desorption can be applied in astrophysical environments have been developed, using the sublimation of solid methanol as an example.
Acharyya, Amandeep S. Bolina, Attard, Ayotte, Bahr, Bennett, Bolina, Brown, Brown, Christmann, Collings, Collings, Collings, Dartois, Dawes, Fraser, Fraser, Gong, Gálvez, Günster, Harris, Herbst, Hrbek, Jenniskens, Kimmel, King, Kouchi, Mark P. Collings, Markwick, Martin R. S. McCoustra, Maté, Nagaoka, Nishimura, Outka, Palmer, Peremans, Peremans, Pontoppidan, Pontoppidan, Pratt, Rendulic, Roberts, Rui Chen, Safarik, Sandford, Sexton, Sexton, Sexton, Simon D. Green, Smith, Sneh, Souda, Thrower, Tielens, Tielens, Torrie, Viti, Viti, Wang, Watanabe, Wendy A. Brown, Wolff, Woodruff, Wu, Zhang   +64 more
core   +1 more source

Microbial Endolithic Community at Meteor Crater

Meteoritics &Planetary Science, EarlyView.
Abstract Postimpact recovery and evolution in response to climate changes produced a modern ecosystem at Meteor Crater dominated by a grassland and woodland of piñon and juniper, which has been used to evaluate floral and megafaunal consequences of impact cratering during the Phanerozoic Eon of complex life.
David A. Kring, Charles S. Cockell
wiley   +1 more source

Adsorption of Volatiles on Dust Grains in Protoplanetary Disks

The Astrophysical Journal
The adsorption of volatile molecules onto dust grain surfaces fundamentally influences dust-related processes, including condensation of gas-phase molecules, dust coagulation, and planet formation in protoplanetary disks. Using advanced ab initio density
Lile Wang, Feng Long, Haifeng Yang, Ruobing Dong, Shenzhen Xu   +4 more
doaj   +1 more source

The Evolution of Dust in the Early Universe with Applications to the Galaxy SDSS J1148+5251

, 2007
Dusty hyperluminous galaxies in the early universe provide unique environments for studying the role of massive stars in the formation and destruction of dust.
Anthony P. Jones, Eales S. A., Eli Dwek, Elvis M., Fioc M., Frederic Galliano   +5 more
core   +1 more source

Ionization in atmospheres of brown dwarfs and extrasolar planets. IV. The effect of cosmic rays [PDF]

, 2013
Cosmic rays provide an important source for free electrons in Earth's atmosphere and also in dense interstellar regions where they produce a prevailing background ionization. We utilize a Monte Carlo cosmic ray transport model for particle energies of 10(
Helling, Christiane, Rimmer, Paul
core   +2 more sources

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

Geometric Proca with matter in metric-Palatini gravity

European Physical Journal C: Particles and Fields, 2022
In the present work, we study linear, torsion-free metric-Palatini gravity, extended by the quadratics of the antisymmetric part of the Ricci tensor and extended also by the presence of the affine connection in the matter sector.
Durmuş Demir, Beyhan Puliçe
doaj   +1 more source

Observational diagnostics of gas in protoplanetary disks

, 2009
Protoplanetary disks are composed primarily of gas (99% of the mass). Nevertheless, relatively few observational constraints exist for the gas in disks. In this review, I discuss several observational diagnostics in the UV, optical, near-IR, mid-IR, and (
A. Carmona, A. Carmona, A. Carmona, A. Carmona, A. Dutrey, A. Dutrey, A. Dutrey, A. Lecavelierdes Etangs, A. Lecavelierdes Etangs, A. Natta, A. Natta, A. Roberge, A. Roberge, A. Sicilia-Aguilar, A.E. Glassgold, A.M. Mandell, Andrés Carmona, B. Acke, B. Acke, C. Espaillat, C. Martin, C. Martin-Zaïdi, C. Martin-Zaïdi, C. Martin-Zaïdi, C. Martin-Zaïdi, C. Salyk, C. Salyk, C.A. Grady, C.J. Chandler, D. Hollenbach, D. Hollenbach, D.A. Weintraub, D.A. Weintraub, D.R. Ardila, D.W. Koerner, E. Bergin, E. Tatulli, E. Wilkinson, E.A. Bergin, E.I. Chiang, E.L. Gibb, E.L. Gibb, F. Lahuis, F. Lahuis, F.M. Walter, G. Meeus, G. Plas van der, G. Plas van der, G.A. Blake, G.J. Herczeg, G.J. Herczeg, G.J. Herczeg, G.J. Herczeg, G.J. Herczeg, G.W. Doppmann, H. Nomura, H. Nomura, H.J. Langevelde van, I Pascucci, I. Pascucci, I. Pascucci, I. Sheret, J. Muzerolle, J. Muzerolle, J. Muzerolle, J. Najita, J. Najita, J. Najita, J.-C. Bouret, J.A. Valenti, J.E. Gizis, J.M. Brown, J.R. Najita, J.R. Najita, J.R. Najita, J.S. Bary, J.S. Bary, J.S. Bary, J.S. Carr, J.S. Carr, J.S. Carr, J.S. Carr, J.S. Carr, J.S. Carr, K. France, K.E. Haisch Jr., K.M. Pontoppidan, L. Errico, L. Hartmann, L.A. Cieza, M. Goto, M. Gustafsson, M.A. Bitner, M.E. Ancker van den, M.F. Skrutskie, M.G. Berthoud, M.J. Richter, N. Calvet, N. Scoville, R Boekel van, R. Meijerink, R.D. Alexander, R.L. Akeson, R.L. Akeson, S. Beckwith, S. Brittain, S. Guilloteau, S. Guilloteau, S. Sako, S.D. Brittain, S.D. Brittain, S.D. Brittain, S.D. Brittain, S.J. Shukla, S.K. Ramsay Howat, S.M. Andrews, S.V.W. Beckwith, T.L. Beck, T.R. Geballe, T.W. Rettig, T.W. Rettig, U. Gorti, V. Mannings, V. Piétu, W.-F. Thi, W.-F. Thi, W.-F. Thi, W.F. Thi, W.R.F. Dent, Y. Itoh   +129 more
core   +2 more sources

CI chondrite Oued Chebeika 002 links asteroids Bennu and Ryugu to common parent body

Meteoritics &Planetary Science, EarlyView.
Abstract CI chondrites are a compositionally primitive group of meteorites that have undergone extensive aqueous alteration, providing insights into the evolution of primitive planetesimals. Oued Chebeika 002 is the most pristine CI chondrite to date.
Megan Broussard, Katharina Lodders, Paul K. Carpenter, Piers Koefoed, Karen Ziegler, Kunihiko Nishiizumi, Marc W. Caffee, Laurence A. J. Garvie, Ryan C. Ogliore, Anthony J. Irving, Bradley L. Jolliff, Kun Wang   +11 more
wiley   +1 more source