Zobrazeno 1 - 10
of 384
pro vyhledávání: '"Combi M"'
Oxygen-bearing organic molecules in comet 67P's dusty coma: first evidence for abundant heterocycles
Autor:
Hänni, N., Altwegg, K., Baklouti, D., Combi, M., Fuselier, S. A., De Keyser, J., Müller, D. R., Rubin, M., Wampfler, S. F.
Publikováno v:
A&A 678, A22 (2023)
The puzzling complexity of terrestrial biomolecules is driving the search for complex organic molecules in the Interstellar Medium (ISM) and serves as a motivation for many in situ studies of reservoirs of extraterrestrial organics from meteorites an
Externí odkaz:
http://arxiv.org/abs/2308.00343
Publikováno v:
Icarus 398, 115543, 2023
In 2021 and 2022 the hydrogen comae of three long period comets, C/2020 S3 (Erasmus), C/2021 A1 (Leonard) and C/2021 O3 (PanSTARRS) were observed with the Solar Wind ANisotropies (SWAN) all-sky hydrogen Lyman-alpha camera on the SOlar and Heliosphere
Externí odkaz:
http://arxiv.org/abs/2304.03333
Autor:
Altwegg, K., Combi, M., Fuselier, S. A., Hänni, N., De Keyser, J., Mahjoub, A., Müller, D. R., Pestoni, B., Rubin, M., Wampfler, S. F.
Ammonium hydrosulphide has long since been postulated to exist at least in certain layers of the giant planets. Its radiation products may be the reason for the red colour seen on Jupiter. Several ammonium salts, the products of NH3 and an acid, have
Externí odkaz:
http://arxiv.org/abs/2208.11396
Autor:
Lisse, C. M., Combi, M. R., Farnham, T. L., Russo, N. Dello, Sandford, S., Cheng, A. F., Fink, U., Harris, W. M., McMahon, J., Scheeres, D. J., Weaver, H. A., Leary, J.
We present a study of the current state of knowledge concerning spacecraft operations and potential hazards while operating near a comet nucleus. Starting from simple calculations comparing the cometary coma environment to benign conditions on Earth,
Externí odkaz:
http://arxiv.org/abs/2201.11024
Autor:
Hänni, N., Altwegg, K., Balsiger, H., Combi, M., Fuselier, S. A., De Keyser, J., Pestoni, B., Rubin, M., Wampfler, S. F.
Publikováno v:
A&A 647, A22 (2021)
The cyano radical (CN) is one of the most frequently remotely observed species in space, also in comets. Data from the high-resolution Double Focusing Mass Spectrometer (DFMS) on board the Rosetta orbiter, collected in the inner coma of comet 67P/Chu
Externí odkaz:
http://arxiv.org/abs/2102.03433
C/2020 F3 (NEOWISE) was discovered in images from the Near Earth Object program of the Wide-Field Infrared Survey Explorer (NEOWISE) taken on 27 March 2020 and has become the Great Comet of 2020. The Solar Wind ANisotropies (SWAN) camera on the Solar
Externí odkaz:
http://arxiv.org/abs/2102.00074
Autor:
Altwegg, K., Balsiger, H., Combi, M., De Keyser, J., Drozdovskaya, M. N., Fuselier, S. A., Gombosi, T. I., Hänni, N., Rubin, M., Schuhmann, M., Schroeder, I., Wampfler, S.
Publikováno v:
2020, Monthly Notices of the Royal Astronomical Society, 498(4), 5855-5862
The ratios of the three stable oxygen isotopes 16O, 17O and 18O on Earth and, as far as we know in the solar system, show variations on the order of a few percent at most, with a few outliers in meteorites. However, in the interstellar medium there a
Externí odkaz:
http://arxiv.org/abs/2012.05788
Autor:
Beth, A., Altwegg, K., Balsiger, H., Berthelier, J. -J., Combi, M. R., De Keyser, J., Fiethe, B., Fuselier, S. A., Galand, M., Gombosi, T. I., Rubin, M., Sémon, T.
Publikováno v:
A&A 642, A27 (2020)
The Rosetta spacecraft escorted Comet 67P/Churyumov-Gerasimenko for 2 years along its journey through the Solar System between 3.8 and 1.24~au. Thanks to the high resolution mass spectrometer on board Rosetta, the detailed ion composition within a co
Externí odkaz:
http://arxiv.org/abs/2008.08430
In 2017, 2018 and 2019, comets 46P/Wirtanen, 45P/Honda-Mrkos-Pajdusakova, and 41P/Tuttle-Giacobini-Kresak all had perihelion passages. Their hydrogen comae were observed by the Solar Wind ANisotropies (SWAN) all-sky hydrogen Lyman-alpha Camera on the
Externí odkaz:
http://arxiv.org/abs/2007.05138
Autor:
Altwegg, K., Balsiger, H., Berthelier, J. -J., Briois, C., Combi, M., Cottin, H., De Keyser, J., Dhooghe, F., Fiethe, B., Fuselier, S. A., Gombosi, T. I., Hänni, N., Rubin, M., Schuhmann, M., Schroeder, I., Sémon, T., Wampfler, S.
Cometary comae are generally depleted in nitrogen. The main carriers for volatile nitrogen in comets are NH3 and HCN. It is known that ammonia readily combines with many acids like e.g. HCN, HNCO, HCOOH, etc. encountered in the interstellar medium as
Externí odkaz:
http://arxiv.org/abs/1911.13005