Results 11 to 20 of about 2,093,430 (321)

Evolution of the ion environment of comet 67P/Churyumov-Gerasimenko - Observations between 3.6 and 2.0 AU [PDF]

, 2015
Context. The Rosetta spacecraft is escorting comet 67P/Churyumov-Gerasimenko from a heliocentric distance of >3.6 AU, where the comet activity was low, until perihelion at 1.24 AU. Initially, the solar wind permeates the thin comet atmosphere formed from
H. Nilsson, G. S. Wieser, E. Behar, C. S. Wedlund, E. Kallio, H. Gunell, N. Edberg, A. Eriksson, M. Yamauchi, C. Koenders, M. Wieser, R. Lundin, S. Barabash, K. Mandt, J. Burch, R. Goldstein, P. Mokashi, C. Carr, E. Cupido, P. Fox, K. Szego, Z. Németh, A. Fedorov, J. Sauvaud, H. Koskinen, I. Richter, J. Lebreton, P. Henri, M. Volwerk, C. Vallat, B. Geiger   +30 more
semanticscholar   +2 more sources

Pre-perihelion activity of comet 67P/Churyumov-Gerasimenko

, 2014
Context. Comets are believed to hold a relatively pristine record of the physical and chemical processes that occurred during the formation and evolution of the solar system.
A. Guilbert-Lepoutre, R. Schulz, A. Rożek, S. Lowry, G. Tozzi, J. Stüwe   +5 more
semanticscholar   +2 more sources

Rosetta measurements of lower hybrid frequency range electric field oscillations in the plasma environment of comet 67P

, 2017
Electric field measurements from cometary environments are very rare but can provide important information on how plasma waves help fashion the plasma environment.
T. Karlsson, Anders Eriksson, E. Odelstad, Mats André, G. Dickeli, A. Kullen, Per-Arne Lindqvist, H. Nilsson, Ingo Richter   +8 more
semanticscholar   +2 more sources

Ground-based Detection of Deuterated Water in Comet C/2014 Q2 (Lovejoy) at IR Wavelengths

, 2017
We conducted a deep search for deuterated water (HDO) in the Oort Cloud comet C/2014 Q2 (Lovejoy), through infrared (IR) spectroscopy with NIRSPEC at the Keck Observatory.
L. Paganini, M. Mumma, E. Gibb, G. Villanueva   +3 more
semanticscholar   +2 more sources

The CoPhyLab comet-simulation chamber [PDF]

, 2021
The Comet Physics Laboratory (CoPhyLab) is an international research program to study the physical properties of cometary analog materials under simulated space conditions.
C. Kreuzig, E. Kaufmann, Lethuillier, A., Otto, K., Tiefenbacher, P., Tiefenbacher, P,, Blum, J.,, J. Blum, Sierks, H., M. Schweighart, B. Gundlach, Haack, D., Schweighart, M., Tiefenbacher, P.,, E. Kührt, Feller, C., Kaufmann, E., K. Otto, D. Bischoff, Pommerol, A., Bischoff, D.,, Güttler, C.,, Lethuillier, A.,, G. Kargl, Kreuzig, C.,, Molinski, N. S.,, A. Lethuillier, Kührt, E.,, Haack, D.,, Bischoff, D., Knollenberg, J., Kreuzig, C., Gundlach, B.,, T. Gilke, Kührt, E., Otto, K.,, Kaufmann, Erika,, A. Pommerol, H. Sierks, Schweighaert, M., P. Tiefenbacher, Sierks, H.,, Hänni, N.,, C. Feller, Pommerol, A.,, Capelo, H.,, Gilke, T., Macher, W., Gilke, T.,, W. Macher, Molinski, N.S., Hänni, N., N. S. Molinski, Capelo, H., H. Capelo, C. Güttler, Blum, J., Molinski, N., Kargl, G.,, Kargl, G., Schweighart, M.,, Gundlach, B., Macher, W.,, Molinski, N. S., D. Haack, N. Hänni, Feller, C.,, Knollenberg, J.,, Güttler, C., J. Knollenberg   +69 more
core   +1 more source

Oxygen-bearing organic molecules in comet 67P's dusty coma: First evidence for abundant heterocycles [PDF]

, 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 and ...
Müller, D.R., K. Altwegg, J. De Keyser, M. Rubin, Fuselier, S. A., Fuselier, S.A., M. Combi, Müller, D., Baklouti, D., D. Baklouti, D. R. Müller, S. F. Wampfler, Fuselier, S., Wampfler, S.F., Wampfler, S., Müller, D. R., Hänni, N., Wampfler, S. F., Combi, M., De Keyser, J., N. Hänni, S. A. Fuselier, Altwegg, K., Rubin, M., Altwegg, Kathrin   +24 more
core   +1 more source

Volatile Abundances, Extended Coma Sources, and Nucleus Ice Associations in Comet C/2014 Q2 (Lovejoy)

, 2022
International audienceHigh-resolution infrared spectra of comet C/2014 Q2 Lovejoy were acquired with NIRSPEC at the W. M. Keck Observatory on two post-perihelion dates (UT 2015 February 2 and 3). H2O was measured simultaneously with CO, CH3OH, H2CO, CH4,
Khan, Younas, Vervack, Ronald J., Bonev, Boncho P., Cochran, Anita L., Roth, Nathan X., Saki, Mohammad, Weaver, Harold A., Crovisier, Jacques, Disanti, Michael A., Dello Russo, Neil, Gibb, Erika L., Kobayashi, Hitomi, Biver, Nicolas, Kawakita, Hideyo, D., Bockelée-Morvan, Harris, Walter M., Mckay, Adam J.   +16 more
core   +2 more sources

Recombinant Forms of HIV-1 in the Last Decade of the Epidemic in the Russian Federation

Viruses, 2023
Currently, HIV-1 displays a substantial level of genetic diversity on a global scale, partly attributed to its recombinant variants. This study seeks to identify and analyze HIV-1 recombinants in Russia during the last decade of the epidemic.
Anastasiia Antonova, Elena Kazennova, Aleksey Lebedev, Ekaterina Ozhmegova, Anna Kuznetsova, Aleksandr Tumanov, Marina Bobkova   +6 more
doaj   +1 more source

A polarimetric study of asteroids in comet-like orbits

, 2022
Context. Asteroids in comet-like orbits (ACOs) consist of asteroids and dormant comets. Due to their similar appearance, it is challenging to distinguish dormant comets from ACOs via general telescopic observations.
Yoonyoung Kim, Okazaki, Ryo, Takagi, Seiko, Watanabe, Makoto, Kuramoto, Kiyoshi, Kim, Yoonyoung, Ryo Okazaki, Jeremie J. Vaubaillon, Kiyoshi Kuramoto, Masateru Ishiguro, Mitsuteru Sato, Yoonsoo P. Bach, Yuna G. Kwon, Geem, Jooyeon, Ishiguro, Masateru, Kwon, Yuna G., Hanayama, Hidekazu, Hidekazu Hanayama, Makoto Watanabe, Masataka Imai, Sekiguchi, Tomohiko, Sato, Mitsuteru, Sunho Jin, Jooyeon Geem, Hiroyuki Naito, Naito, Hiroyuki, Tomohiko Sekiguchi, Daisuke Kuroda, Tatsuharu Oono, Yuki Futamura, Kuroda, Daisuke, Jin, Sunho, Bach, Yoonsoo P., Imai, Masataka, Oono, Tatsuharu, Seiko Takagi, Vaubaillon, Jeremie J., Futamura, Yuki   +37 more
core   +1 more source

Rosetta Zoo: finding changes on comet 67P [PDF]

, 2022
Comets are generally considered to be relatively pristine objects, having spent most of their existence at large heliocentric distances where there is not enough energy to significantly transform these objects.
Schallig, Ellen, Heather, David, Bentley, Mark, Birch, Samuel, Vincent, Jean-Baptiste, Kueppers, Michael, Mignone, Claudia, Merín, Bruno, Kruk, Sandor, Besse, Sebastien   +9 more
core   +1 more source