Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Comet volatiles"'
Autor:
Manuela Lippi, Linda Podio, Claudio Codella, Sara Faggi, Marta De Simone, Geronimo L. Villanueva, Michael J. Mumma, Cecilia Ceccarelli
Publikováno v:
The Astrophysical Journal Letters, Vol 970, Iss 1, p L5 (2024)
Comets are frozen remnants of our solar system’s formation, and comparing their chemical composition to that of planet-forming systems can reveal crucial insights about our origins, potentially answering one of the most challenging questions in pla
Externí odkaz:
https://doaj.org/article/357566b4f82642be879763352badc2e2
Autor:
Xian Shi, Xuanyu Hu, Jessica Agarwal, Carsten Güttler, Martin Rose, Horst Uwe Keller, Marco Fulle, Jakob Deller, Holger Sierks
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 1, p L16 (2024)
Ejection of large boulder-like debris is a vigorous form of cometary activity that is unlikely induced by water ice out-gassing alone but rather associated with the sublimation of super-volatile ices. Though perceived on several comets, the actual pa
Externí odkaz:
https://doaj.org/article/d4111af037fd4c16854498d6f64d057b
Autor:
Carrie E. Holt, Matthew M. Knight, Michael S. P. Kelley, Tim Lister, Quanzhi Ye, Colin Snodgrass, Cyrielle Opitom, Rosita Kokotanekova, Megan E. Schwamb, Matthew M. Dobson, Michele T. Bannister, Marco Micheli, Stefanie N. Milam, Derek C. Richardson, The LCO Outbursting Objects Key (LOOK) Project, Edward Gomez, Joseph P. Chatelain, Sarah Greenstreet
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 12, p 273 (2024)
Dynamically new comets provide important insights into the conditions of the presolar nebula and its evolution, as they are believed to have experienced minimal solar heating before their discovery. Since 2020 August, the Las Cumbres Observatory (LCO
Externí odkaz:
https://doaj.org/article/73afdd1b97b8408691bd9ab0ff73929b
Autor:
Nora Hänni, Kathrin Altwegg, Michael Combi, Stephen A. Fuselier, Johan De Keyser, Niels F. W. Ligterink, Martin Rubin, Susanne F. Wampfler
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 74 (2024)
Technological progress related to astronomical observatories such as the recently launched James Webb Space Telescope (JWST) allows searching for signs of life beyond our solar system, namely, in the form of unambiguous biosignature gases in exoplane
Externí odkaz:
https://doaj.org/article/f3e4c5d73480493f82269c0293e9b554
Autor:
Anastasios Gkotsinas, David Nesvorný, Aurélie Guilbert-Lepoutre, Sean N. Raymond, Nathan Kaib
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 11, p 243 (2024)
Born as ice-rich planetesimals, cometary nuclei were gravitationally scattered onto their current orbits in the Kuiper Belt and the Oort Cloud during the giant planets’ dynamical instability in the early stages of our solar system’s history. Here
Externí odkaz:
https://doaj.org/article/45ca7fd8e8cd4fe6a309a2132121cfe0
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 189 (2024)
The distribution of chemical species in protoplanetary disks around young stars, especially their division between gas and solid phases, fundamentally shapes the composition of future planets and planetesimals. This distribution is likely affected by
Externí odkaz:
https://doaj.org/article/27bdb376fe5a401cba417f73cf873eb7
Autor:
Mohammad Saki, Dennis Bodewits, Boncho P. Bonev, Neil Dello Russo, Adrienn Luspay-Kuti, John W. Noonan, Michael. R. Combi, Yinsi Shou
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 3, p 70 (2024)
Comets, as remnants of the solar system’s formation, vary in volatile-refractory content. In situ comet studies, such as the Rosetta mission to 67P/Churyumov–Gerasimenko, provide detailed volatile composition insights, while ground-based studies
Externí odkaz:
https://doaj.org/article/613f6d90664642d29940df6654915879
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 2, p 39 (2024)
The study of cometary composition is important for understanding our solar system's early evolutionary processes. Carbon dioxide (CO _2 ) is a common hypervolatile in comets that can drive activity but is more difficult to study than other hypervolat
Externí odkaz:
https://doaj.org/article/8b6ec472efad4c5a93e50d7dc9f238e2
Autor:
Dave G. Milewski, Joseph R. Masiero, Jana Pittichová, Emily A. Kramer, Amy K. Mainzer, James M. Bauer
Publikováno v:
The Astronomical Journal, Vol 167, Iss 3, p 99 (2024)
Hyperactive comet activity typically becomes evident beyond the frost line (∼3–4 au) where it becomes too cold for water-ice to sublimate. If carbon monoxide (CO) and carbon dioxide (CO _2 ) are the species that drive activity at sufficiently lar
Externí odkaz:
https://doaj.org/article/b99c0b3a4d2f43eaad820c63565c7327
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