Results 51 to 60 of about 3,688 (211)

Evolution of the dust coma in comet 67P/Churyumov-Gerasimenko before the 2009 perihelion

, 2011
Context. Comet 67P/Churyumov-Gerasimenko is the main target of ESA’s Rosetta mission and will be encountered in May 2014. Because the spacecraft will orbit the comet nucleus before and after release of the lander Philae, it is necessary to know the ...
R. Schulz, Tozzi, G. P., P. Patriarchi, L. Kolokolova, Boehnhardt, H., Schulz, R., Vincent, J., Licandro, J., Stüwe, J., Patriarchi, P., Kolokolova, L., Tozzi, G., H. Boehnhardt, J. Licandro, J. Stüwe, J.-B. Vincent, Vincent, J.-B., G. P. Tozzi   +17 more
core   +1 more source

Modeling Ice and Dust in Comet C/2017 K2 (Pan-STARRS)’s Coma

The Planetary Science Journal
C/2017 K2 (Pan-STARRS) is a long-period comet that has been active since 24 au inbound and likely as far out as 35 au, far beyond where the sublimation of water ice can power cometary activity.
Megan Firgard, Theodore Kareta
doaj   +1 more source

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

Meteoritics &Planetary Science, EarlyView.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà, A. Vyjidak, G. A. Baratta, B. M. Giuliano, R. G. Urso, C. Scirè, D. Fulvio, T. Grassi, P. Jusko, P. Caselli, M. E. Palumbo   +10 more
wiley   +1 more source

The backscattering ratio of comet 67P/Churyumov-Gerasimenko dust coma as seen by OSIRIS onboard Rosetta [PDF]

, 2019
International audienceRemote sensing observations of dust particles ejected from comets provide important hints on the intimate nature of the materials composing these primitive objects.
Lamy, P., Bertaux, J-L., Rodrigo Montero, Rafael, Davidsson, Björn, Güttler, C, Bertaux, J. -L., Kovacs, G., Penasa, Luca, Koschny, D, Debei, Stefano, Ivanovsky, S, Güttler, C., Lucchetti, A., Keller, H. U., Sierks, H., Moreno, J J Lopez, Hasselmann, P., Lamy, Philippe, L., Shi, Xian, Barucci, M.A., Naletto, Giampiero, Rinaldi, G, Lamy, P.L., Ip, Wing-Huen, Toth, I, Ivanovsky, S., Hasselmann, P H, Ip, W., Bertini, Ivano, Shi, X., Sierks, H, Pajola, M., Debei, S., Lazzarin, M, De Cecco, M, Ferrari, S., Cambianica, P, Davidsson, B., Petropoulou, V, Naletto, G., Lara, Luisa-Maria, Fulle, M, Penasa, L., Ip, W-H, Naletto, G, Hasselmann, Pedro Henrique, Fulle, M., Bodewits, Dennis, Toth, I., Lucchetti, A, Masoumzadeh, Nafiseh, Agarwal, J, Cremonese, G, Ferri, F, Kovacs, Gabor, Lara, L., Munoz, O, Masoumzadeh, N., Guirado, D, Gutiérrez, Pedro J., Mottola, S, Bodewits, D, Barucci, M., Lazzari, M., Tubiana, C, Lara, L.M., Sierks, Holger, Da Deppo, V., Debei, S, Munoz, O., Rotundi, A., Lopez Moreno, J. J., Ip, W-H., da Deppo, Vania, Davidsson, B, Rodrigo, R., Lucchetti, Alice, Tubiana, C., Moreno, Fernando, Cambianica, P., Massironi, M, Lara, Luisa María, Masoumzadeh, N, Moreno, J.J. Lopez, La Forgia, F, Lopez-Moreno, Josè Juan, Deller, J, Barucci, M. A., Ferri, F., Fulle, Marco, De Cecco, M., Barbieri, Cesare, Barucci, M A, Rinaldi, Giovanna, Lazzarin, M., Bertaux, Jean-Loup, Gutierrez, P. J., Barbieri, C., Forgia, F La, Guirado, D., Koschny, Detlef, Koschny, D., Mottola, Stefano, Pajola, Maurizio, Lamy, Philippe,, Rinaldi, G., Rodrigo, R, Ferri, Francesca, Marzari, Francesco, Gutiérrez, P.J., Bertini, I., Toth, Imre, Lara, L M, Lamy, P, Massironi, M., Deller, J., Gutierrez, P., de Cecco, Mariolino, Hasselmann, P.H., Ivanovski, S., Fornasier, S., Petropoulou, V., Güttler, Carsten, Bertaux, J-L, Muñoz, Olga, Massironi, Matteo, Agarwal, J., Frattin, E., Rotundi, A, Bertaux, J.L., Moreno, F, La Forgia, Fiorangela, Gutierrez, P J, Bodewits, D., Ip, W. H., Lazzarin, Monica, Agarwal, Jessica, Deller, Jakob, Keller, H.U., Ip, W. -H., Keller, Horst U., Cremonese, Gabriele, Bertaux, J., Da Deppo, V, Cremonese, G., Moreno, F., Barbieri, C, Keller, H., Rodrigo, Rafael, Shi, X, Tubiana, Cécilia, Lopez Moreno, J., Bertini, I, Mottola, S., Frattin, E, Kovacs, G, Fornasier, S, Hasselmann, P. H., Barucci, Maria Antonella, Guirado, Daniel, Penasa, L, Fornasier, Sonia, La Forgia, F., Lara, L. M., Keller, H U, Ferrari, Sabrina, Marzari, F, Rotundi, Alessandra, Ferrari, S, Pajola, M, Marzari, F.   +170 more
core   +1 more source

The Evolution in Coma Molecular Composition of Comet C/2017 K2 (PanSTARRS) across the H2O Sublimation Zone: ALMA Imaging of a H2O-dominated Coma

The Planetary Science Journal
We report a survey of molecular emission from cometary volatiles using the Atacama Large Millimeter/submillimeter Array toward comet C/2017 K2 (PanSTARRS) carried out on UT 2022 September 21, 22, and 23 at a heliocentric distance ( r _H ) of 2.1 au ...
Nathan X. Roth, Stefanie N. Milam, Martin A. Cordiner, Anthony J. Remijan, Dominique Bockelée-Morvan, Nicolas Biver, Jérémie Boissier, Steven B. Charnley, Charles E. Woodward, Lillian X. Hart, Timothy N. Proudkii   +10 more
doaj   +1 more source

Spatial Distribution and Color of Dust in Halley’s Inner Coma [PDF]

International Astronomical Union Colloquium, 1991
Abstract Composite images of the intensity of solar radiation scattered by dust in Halley’s coma are constructed by using the three-channel spectra obtained during the approach phase of the Vega 2 spacecraft. They cover a sector centered on the nucleus that has a radius of 40000 km and an angular extent of 50°.
J. Clairemidi, E. Brandon, P. Rousselot, G. Moreels   +3 more
openaire   +1 more source

Neurocognitive Aging Following Acute Illness: Pathobiology and a Framework for Developing Neurotherapeutic Agents

Brain and Behavior, Volume 16, Issue 6, June 2026.
In this review, we discuss the scientific basis for how neurocognitive aging occurs after critical illness, including sepsis, trauma, and burns, and the clinical need to develop therapies to reduce inflammation, protect the blood–brain barrier, remove senescent cells, and enhance neuroplasticity.
Errin Lawrence, Daniel Fulton, Poppy Brown, Subashini Suresh, Mark Morris, Paraskevi Goggolidou, Sree Chaithanya, Marcus Abbawy, Amelia Wild, Prashant Nasa, Niharika A. Duggal, Fang Gao‐Smith, Zubair Ahmed, Suresh Renukappa, Tonny Veenith   +14 more
wiley   +1 more source

Rapid changes of the lava‐delta coastlines formed by the 2021 volcanic eruption on La Palma, Canary Islands

Earth Surface Processes and Landforms, Volume 51, Issue 6, June 2026.
A new coastline formed during the 2021 eruption of La Palma quickly eroded, becoming crenellated and with pocket beaches, then retreated more gradually as resistant interiors of the lava were exposed. In contrast, a second thicker lava delta changed more gradually, highlighting the importance of lithology to coastal erosion.
Zhongwei Zhao, Neil C. Mitchell, José Antonio Lozano Rodríguez, Eugenio Fraile‐Nuez, Juan Tomás Vázquez, Rui Quartau, Ricardo S. Ramalho   +6 more
wiley   +1 more source

Activity-induced Near-infrared Spectral Variability at 29P/Schwassmann–Wachmann 1, 2017–2022

The Planetary Science Journal
29P/Schwassmann–Wachmann 1 (SW1) is both the first-discovered active Centaur and the most outburst-prone comet known. The nature of SW1’s many outbursts, which regularly brighten the comet by 5 mag or more, and what processes power them has been of ...
Theodore Kareta, Charles A. Schambeau, Megan Firgard, Yanga R. Fernández   +3 more
doaj   +1 more source

Monte-Carlo and multifluid modelling of the circumnuclear dust coma II. Aspherical-homogeneous, and spherical-inhomogeneous nuclei

, 2009
International audienceWe use our newly developed Dust Monte-Carlo (DMC) simulation technique (Crifo et al., 2005a) to study the dynamics of dust grains in the vicinity of some of the benchmark aspherical, homogeneous cometary nuclei and of the benchmark ...
Crifo, Jean-François, Rodionov, A.V., Zakharov, V.V., Lukianov, G.A.   +3 more
core   +1 more source