164 results on '"Strobel, D. F."'
Search Results
2. A major ice component in Pluto’s haze
- Author
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Lavvas, P., Lellouch, E., Strobel, D. F., Gurwell, M. A., Cheng, A. F., Young, L. A., and Gladstone, G. R.
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- 2021
- Full Text
- View/download PDF
3. An intense thermospheric jet on Titan
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Lellouch, E., Gurwell, M. A., Moreno, R., Vinatier, S., Strobel, D. F., Moullet, A., Butler, B., Lara, L., Hidayat, T., and Villard, E.
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- 2019
- Full Text
- View/download PDF
4. Pluto's interaction with its space environment: Solar wind, energetic particles, and dust
- Author
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Bagenal, F., Horányi, M., McComas, D. J., McNutt, R. L., Elliott, H. A., Hill, M. E., Brown, L. E., Delamere, P. A., Kollmann, P., Krimigis, S. M., Kusterer, M., Lisse, C. M., Mitchell, D. G., Piquette, M., Poppe, A. R., Strobel, D. F., Szalay, J. R., Valek, P., Vandegriff, J., Weidner, S., Zirnstein, E. J., Stern, S. A., Ennico, K., Olkin, C. B., Weaver, H. A., and Young, L. A.
- Published
- 2016
5. Mapping the Brightness of Ganymede's Ultraviolet Aurora using Hubble Space Telescope Observations
- Author
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Marzok, A., Schlegel, S., Saur, J., Roth, L., Grodent, D., Strobel, D. F., Retherford, K. D., 1 Institute of Geophysics and Meteorology, University of Cologne Cologne Germany, 2 School of Electrical Engineering, KTH Royal Institute of Technology Stockholm Sweden, 3 Laboratoire de Physique Atmosphérique et Planétaire, STAR Institute, University of Liège Liège Belgium, 4 Department of Earth and Planetary Science, and Department of Physics and Astronomy, The Johns Hopkins University Baltimore MD USA, and 5 Southwest Research Institute San Antonio TX USA
- Subjects
Earth and Planetary Astrophysics (astro-ph.EP) ,Geophysics ,ddc:523 ,Space and Planetary Science ,Geochemistry and Petrology ,Earth and Planetary Sciences (miscellaneous) ,FOS: Physical sciences ,Astrophysics - Earth and Planetary Astrophysics - Abstract
We analyze Hubble Space Telescope observations of Ganymede made with the Space Telescope Imaging Spectrograph between 1998 and 2017 to generate a brightness map of Ganymede's oxygen emission at 1,356 Å. Our Mercator projected map demonstrates that the brightness along Ganymede's northern and southern auroral ovals strongly varies with longitude. To quantify this variation around Ganymede, we investigate the brightness averaged over 36°‐wide longitude corridors centered around the sub‐Jovian (0° W), leading (90° W), anti‐Jovian (180° W), and trailing (270° W) central longitudes. In the northern hemisphere, the brightness of the auroral oval is 3.7 ± 0.4 times lower in the sub‐Jovian and anti‐Jovian corridors compared to the trailing and leading corridors. The southern oval is overall brighter than the northern oval, and only 2.5 ± 0.2 times fainter on the sub‐ and anti‐Jovian corridors compared to the trailing and leading corridors. This demonstrates that Ganymede's auroral ovals are strongly structured in auroral crescents on the leading side (plasma downstream side) and on the trailing side (plasma upstream side). We also find that the brightness is not symmetric with respect to the 270° meridian, but shifted by ∼20° towards the Jovian‐facing hemisphere. Our map will be useful for subsequent studies to understand the processes that generate the aurora in Ganymede's non‐rotationally driven, sub‐Alfvénic magnetosphere., Plain Language Summary: Northern lights often illuminate the night sky in a shimmering green or red tone at high geographic latitudes. This emission, scientifically referred to as aurora, is a result of electrically charged particles that move along Earth's magnetic field lines and interact with its atmosphere to produce auroral emission. Apart from the Earth, multiple other planets in our solar system also exhibit auroral emission. By characterizing the brightness and structure of these lights, we are therefore able to deduce insights about a planet's atmosphere, magnetic field and the physical processes occurring along the field lines from afar. In this work, we used observations from the Hubble Space Telescope to analyze the auroral emission of Jupiter's largest moon Ganymede. We combined multiple images of Ganymede to create the first complete map that displays the auroral brightness. Our map revealed that the emission on Ganymede's auroral ovals varies strongly in brightness with divisions into two distinct bright and faint regions. They resemble two auroral crescents in the north and south respectively, and demonstrate the uniqueness of Ganymede's aurora in comparison with the auroral ovals of other planets in the solar system., Key Points: Brightness map of Ganymede's ultraviolet auroral emission has been constructed based on Hubble Space Telescope observations from 1998 to 2017. Auroral ovals are structured in upstream and downstream “crescents”. Brightness on sub‐Jovian and anti‐Jovian side is strongly reduced by a factor of 3–4 compared to upstream and downstream side., European Research Council (ERC), http://archive.stsci.edu/hst/
- Published
- 2022
6. VizieR Online Data Catalog: Triton light curves from 05/10/2017 (Marques Oliveira+, 2022)
- Author
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Marques Oliveira, J., Sicardy, B., Gomes-Junior, A. R., Ortiz, J. L., Strobel, D. F., Bertrand, T., Forget, F., Lellouch, E., Desmars, J., Berard, D., Doressoundiram, A., Lecacheux, J., Leiva, R., Meza, E., Roques, F., Souami, D., Widemann, T., Santos-Sanz, P., Morales, N., Duffard, R., Fernandez-Valenzuela, E., Castro-Tirado, A. J., Braga-Ribas, F., Morgado, B. E., Assafin, M., Camargo, J. I. B., Vieira-Martins, R., Benedetti-Rossi, G., Santos-Filho, S., Banda-Huarca, M. V., Quispe-Huaynasi, F., Pereira, C. L., Rommel, F. L., Margoti, G., Dias-Oliveira, A., Colas, F., Berthier, J., Renner, S., Hueso, R., Perez-Hoyos, S., Sanchez-Lavega, A., Rojas, J. F., Beisker, W., Kretlow, M., Herald, D., Gault, D., Bath, K.-L., Bode, H.-J., Bredner, E., Guhl, K., Haymes, T. V., Hummel, E., Kattentidt, B., Klos, O., Pratt, A., Thome, B., Avdellidou, C., Gazeas, K., Karampotsiou, E., Tzouganatos, L., Kardasis, E., Christou, A. A., Xilouris, E. M., Alikakos, I., Gourzelas, A., Liakos, A., Charmandaris, V., Jelinek, M., Strobl, J., Eberle, A., Rapp, K., Gahrken, B., Kowo Llik, S., Bitzer, R., Miller, M., Herzogenrath, G., Frangenberg, D., Brandis, L., Puetz, I., Perdelwitz, V., Piehler, G. M., Riepe, P., von Poschinger, K., Baruffetti, P., Cenadelli, D., Christille, J.-M., Ciabattari, F., Di, Luca R., Alboresi, D., Leto, G., Zanmar Sanchez, R., Bruno, P., Occhipinti, G., Morrone, L., Cupolino, L., Noschese, A., Vecchione, A., Scalia, C., Lo Savio, R., Giardina, G., Kamoun, S., Barbosa, R., Behrend, R., Spano, M., Bouchet, E., Cottier, M., Falco, L., Gallego, S., Tortorelli, L., Sposetti, S., Sussenbach, J., van den Abbeel, F., Andre, P., Llibre, M., Pailler, F., Ardissone, J., Boutet, M., Sanchez, J., Bretton, M., Cailleau, A., Pic, V., Granier, L., Chauvet, R., Conjat, M., Dauvergne, J. L., Dechambre, O., Delay, P., Delcroix, M., Rousselot, L., Ferreira, J., Machado, P., Tanga, P., Rivet, J.-P., Frappa, E., Irzyk, M., Jabet, F., Kaschinski, M., Klotz, A., Rieugnie, Y., Klotz, A. N., Labrevoir, O., Lavandier, D., Walliang, D., Leroy, A., Bouley, S., Lisciandra, S., Coliac, J.-F., Metz, F., Erpelding, D., Nougayrede, P., Miniou, M., Moindrot, S., Morel, P., Reginato, B., Reginato, E., Rudelle, J., Tregon, B., Tanguy, R., David, J., Thuillot, W., Hestroffer, D., Vaudescal, G., Baba Aissa, D., Grigahcene, Z., Briggs, D., Broadbent, S., Denyer, P., Haigh, N. J., Quinn, N., Thurston, G., Fossey, S. J., Arena, C., Jennings, M., Talbot, J., Alonso, S., Roman Reche, A., Casanova, V., Briggs, E., Iglesias-Marzoa, R., Abril Ibanez, J., Diaz, Martin M. C., Gonzalez, H., Maestre Garcia, J. L., Marchant, J., Ordonez-Etxeberria, I., Martorell, P., Salamero, J., Organero, F., Ana, L., Fonseca, F., Peris, V., Brevia, O., Selva, A., Perello, C., Cabedo, V., Goncalves, R., Ferreira, M., Marques Dias, F., Daassou, A., Barkaoui, K., Benkhaldoun, Z., Guennoun, M., Chouqar, J., Jehin, E., Rinner, C., Lloyd, J., El Moutamid, M., Lamarche, C., Pollock, J. T., Caton, D. B., Kouprianov, V., Timerson, B. W., Blanchard, G., Payet, B., Peyrot, A., Teng-Chuen-Yu, J.-P., Francoise, J., Mondon, B., Payet, T., Boissel, C., Castets, M., Hubbard, W. B., Hill, R., Reitsema, H. J., Mousis, O., Ball, L., Hutcheon, S., Lay, K., Anderson, P., Moy, M., Jonsen, M., Pink, I., Walters, R., Downs, B., Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
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Photometry ,Planets ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Solar system - Abstract
International audience; The data provided features all light curves from the 5 October 2017 event. The names of the files are the same names, in lower caps and with no spaces, that are presented in Figures C.1 and C.2. The first column of all files is the time in seconds, starting on 5 October 2017 00:00:00 UTC. The second column of all files is the normalised flux, where the unocculted flux oscillates around 1. (2 data files).
- Published
- 2022
7. PLANETARY SCIENCE: Plutoʼs interaction with its space environment: Solar wind, energetic particles, and dust
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Bagenal, F., Horányi, M., McComas, D. J., McNutt, R. L., Jr., Elliott, H. A., Hill, M. E., Brown, L. E., Delamere, P. A., Kollmann, P., Krimigis, S. M., Kusterer, M., Lisse, C. M., Mitchell, D. G., Piquette, M., Poppe, A. R., Strobel, D. F., Szalay, J. R., Valek, P., Vandegriff, J., Weidner, S., Zirnstein, E. J., Stern, S. A., Ennico, K., Olkin, C. B., Weaver, H. A., Young, L. A., and Science Team, New Horizons
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- 2016
- Full Text
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8. PLANETARY SCIENCE: The Pluto system: Initial results from its exploration by New Horizons
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Stern, S. A., Bagenal, F., Ennico, K., Gladstone, G. R., Grundy, W. M., McKinnon, W. B., Moore, J. M., Olkin, C. B., Spencer, J. R., Weaver, H. A., Young, L. A., Andert, T., Andrews, J., Banks, M., Bauer, B., Bauman, J., Barnouin, O. S., Bedini, P., Beisser, K., Beyer, R. A., Bhaskaran, S., Binzel, R. P., Birath, E., Bird, M., Bogan, D. J., Bowman, A., Bray, V. J., Brozovic, M., Bryan, C., Buckley, M. R., Buie, M. W., Buratti, B. J., Bushman, S. S., Calloway, A., Carcich, B., Cheng, A. F., Conard, S., Conrad, C. A., Cook, J. C., Cruikshank, D. P., Custodio, O. S., Ore, Dalle C. M., Deboy, C., Dischner, Z. J. B., Dumont, P., Earle, A M., Elliott, H. A, Ercol, J., Ernst, C. M., Finley, T., Flanigan, S. H., Fountain, G., Freeze, M. J., Greathouse, T., Green, J. L., Guo, Y., Hahn, M., Hamilton, D. P., Hamilton, S. A., Hanley, J., Harch, A., Hart, H. M., Hersman, C. B., Hill, A., Hill, M. E., Hinson, D. P., Holdridge, M. E., Horanyi, M., Howard, A. D., Howett, C. J. A., Jackman, C., Jacobson, R. A., Jennings, D. E., Kammer, J. A., Kang, H. K., Kaufmann, D. E., Kollmann, P., Krimigis, S. M., Kusnierkiewicz, D., Lauer, T. R., Lee, J. E., Lindstrom, K. L., Linscott, I. R., Lisse, C. M., Lunsford, A. W., Mallder, V. A., Martin, N., McComas, D. J., McNutt, R. L., Jr., Mehoke, D., Mehoke, T., Melin, E. D., Mutchler, M., Nelson, D., Nimmo, F., Nunez, J. I., Ocampo, A., Owen, W. M., Paetzold, M., Page, B., Parker, A. H., Parker, J. W., Pelletier, F., Peterson, J., Pinkine, N., Piquette, M., Porter, S. B., Protopapa, S., Redfern, J., Reitsema, H. J., Reuter, D. C., Roberts, J. H., Bobbins, S. J., Rogers, G., Rose, D., Runyon, K., Retherford, K. D., Ryschkewitsch, M. G., Schenk, P., Schindhelm, E., Sepan, B., Showalter, M. R., Singer, K. N., Soluri, M., Stanbridge, D., Steffl, A. J., Strobel, D. F., Stryk, T., Summers, M. E., Szalay, J. R., Tapley, M., Taylor, A., Taylor, H., Throop, H. B., Tsang, C. C. C., Tyler, G. L., Umurhan, O. M., Verbiscer, A. J., Versteeg, M. H., Vincent, M., Webbert, R., Weidner, S., Weigle, G. E., II, White, O. L., Whittenburg, K., Williams, B. G., Williams, K., Williams, S., Woods, W. W., Zangari, A. M., and Zirnstein, E.
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- 2015
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9. TandEM: Titan and Enceladus mission
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Coustenis, A., Atreya, S. K., Balint, T., Brown, R. H., Dougherty, M. K., Ferri, F., Fulchignoni, M., Gautier, D., Gowen, R. A., Griffith, C. A., Gurvits, L. I., Jaumann, R., Langevin, Y., Leese, M. R., Lunine, J. I., McKay, C. P., Moussas, X., Müller-Wodarg, I., Neubauer, F., Owen, T. C., Raulin, F., Sittler, E. C., Sohl, F., Sotin, C., Tobie, G., Tokano, T., Turtle, E. P., Wahlund, J.-E., Waite, J. H., Baines, K. H., Blamont, J., Coates, A. J., Dandouras, I., Krimigis, T., Lellouch, E., Lorenz, R. D., Morse, A., Porco, C. C., Hirtzig, M., Saur, J., Spilker, T., Zarnecki, J. C., Choi, E., Achilleos, N., Amils, R., Annan, P., Atkinson, D. H., Bénilan, Y., Bertucci, C., Bézard, B., Bjoraker, G. L., Blanc, M., Boireau, L., Bouman, J., Cabane, M., Capria, M. T., Chassefière, E., Coll, P., Combes, M., Cooper, J. F., Coradini, A., Crary, F., Cravens, T., Daglis, I. A., de Angelis, E., de Bergh, C., de Pater, I., Dunford, C., Durry, G., Dutuit, O., Fairbrother, D., Flasar, F. M., Fortes, A. D., Frampton, R., Fujimoto, M., Galand, M., Grasset, O., Grott, M., Haltigin, T., Herique, A., Hersant, F., Hussmann, H., Ip, W., Johnson, R., Kallio, E., Kempf, S., Knapmeyer, M., Kofman, W., Koop, R., Kostiuk, T., Krupp, N., Küppers, M., Lammer, H., Lara, L.-M., Lavvas, P., Le Mouélic, S., Lebonnois, S., Ledvina, S., Li, J., Livengood, T. A., Lopes, R. M., Lopez-Moreno, J.-J., Luz, D., Mahaffy, P. R., Mall, U., Martinez-Frias, J., Marty, B., McCord, T., Menor Salvan, C., Milillo, A., Mitchell, D. G., Modolo, R., Mousis, O., Nakamura, M., Neish, C. D., Nixon, C. A., Nna Mvondo, D., Orton, G., Paetzold, M., Pitman, J., Pogrebenko, S., Pollard, W., Prieto-Ballesteros, O., Rannou, P., Reh, K., Richter, L., Robb, F. T., Rodrigo, R., Rodriguez, S., Romani, P., Ruiz Bermejo, M., Sarris, E. T., Schenk, P., Schmitt, B., Schmitz, N., Schulze-Makuch, D., Schwingenschuh, K., Selig, A., Sicardy, B., Soderblom, L., Spilker, L. J., Stam, D., Steele, A., Stephan, K., Strobel, D. F., Szego, K., Szopa, C., Thissen, R., Tomasko, M. G., Toublanc, D., Vali, H., Vardavas, I., Vuitton, V., West, R. A., Yelle, R., and Young, E. F.
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- 2009
- Full Text
- View/download PDF
10. The New Horizons Radio Science Experiment (REX)
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Tyler, G. L., Linscott, I. R., Bird, M. K., Hinson, D. P., Strobel, D. F., Pätzold, M., Summers, M. E., and Sivaramakrishnan, K.
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- 2008
- Full Text
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11. Photoemission Phenomena in the Solar System
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Slanger, T. G., Cravens, T. E., Crovisier, J., Miller, S., and Strobel, D. F.
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- 2008
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12. Plasma Flow and Related Phenomena in Planetary Aeronomy
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Ma, Y.-J., Altwegg, K., Breus, T., Combi, M. R., Cravens, T. E., Kallio, E., Ledvina, S. A., Luhmann, J. G., Miller, S., Nagy, A. F., Ridley, A. J., and Strobel, D. F.
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- 2008
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13. Exospheres and Atmospheric Escape
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Johnson, R. E., Combi, M. R., Fox, J. L., Ip, W.-H., Leblanc, F., McGrath, M. A., Shematovich, V. I., Strobel, D. F., and Waite, Jr., J. H.
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- 2008
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14. Neutral Atmospheres
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Mueller-Wodarg, I. C. F., Strobel, D. F., Moses, J. I., Waite, J. H., Crovisier, J., Yelle, R. V., Bougher, S. W., and Roble, R. G.
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- 2008
- Full Text
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15. The formation of Charons red poles from seasonally cold-trapped volatiles
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Grundy, W. M., Cruikshank, D. P., Gladstone, G. R., Howett, C. J. A., Lauer, T. R., Spencer, J. R., Summers, M. E., Buie, M. W., Earle, A. M., Ennico, K., Parker, J. Wm., Porter, S. B., Singer, K. N., Stern, S. A., Verbiscer, A. J., Beyer, R. A., Binzel, R. P., Buratti, B. J., Cook, J. C., Dalle Ore, C. M., Olkin, C. B., Parker, A. H., Protopapa, S., Quirico, E., Retherford, K. D., Robbins, S. J., Schmitt, B., Stansberry, J. A., Umurhan, O. M., Weaver, H. A., Young, L. A., Zangari, A. M., Bray, V. J., Cheng, A. F., McKinnon, W. B., McNutt, R. L., Moore, J. M., Nimmo, F., Reuter, D. C., Schenk, P. M., Bagenal, F., Andert, T., Barnouin, O., Bird, M., Brozovi, M., Elliott, H. A., Greathouse, T. K., Hahn, M., Hamilton, D. P., Hill, M. E., Hinson, D. P., Hofgartner, J., Hornyi, M., Howard, A. D., Jennings, D. E., Kammer, J. A., Kollmann, P., Lavvas, P., Linscott, I. R., Lisse, C. M., Lunsford, A. W., McComas, D. J., McNutt Jr., R. L., Mutchler, M., Nunez, J. I., Paetzold, M., Wm. Parker, J., Philippe, S., Piquette, M., Reitsema, H. J., Roberts, J. H., Runyon, K., Schindhelm, E., Showalter, M. R., Steffl, A. J., Strobel, D. F., Stryk, T., Szalay, J. R., Throop, H. B., Tsang, C. C. C., Tyler, G. L., Versteeg, M. H., Weigle II, G. E., White, O. L., Woods, W. W., and Young, E. F.
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Charon (Satellite) -- Natural history -- Observations ,Pluto (Dwarf planet) -- Natural history -- Observations ,Planetary atmospheres -- Natural history -- Observations ,Environmental issues ,Science and technology ,Zoology and wildlife conservation - Abstract
Author(s): W. M. Grundy (corresponding author) [1]; D. P. Cruikshank [2]; G. R. Gladstone [3]; C. J. A. Howett [4]; T. R. Lauer [5]; J. R. Spencer [4]; M. E. [...]
- Published
- 2016
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16. HST/STIS Observations of Ganymede's Auroral Ovals at Eastern Elongation
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Saur, J, Duling, S, Roth, L, Feldman, P. D, Strobel, D. F, Retherford, K. D, McGrath, M. A, and Wennmacher, A
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Astronomy - Abstract
We report on new Space Telescope Imaging Spectrograph (STIS) observations of Ganymede s auroral emissions obtained (to be obtained) during two visits with the Hubble Space Telescope (HST). The observations of the first visit, a five orbits, were obtained on November 19, 2010 and the second visit, also a five orbits, is scheduled for opposition in October/November 2011. We will present results of the full campaign, in case of a successful execution of the second visit. Our observations cover more than half a cycle of system III longitudes of Ganymede s positions within Jupiter s magnetosphere for each visit. We analyze the observations with respect to brightness and locations of Ganymede auroral ovals. Our goal is to set constrains on the interaction of Ganymede s mini-magnetosphere with Jupiter s magnetosphere, Ganymede s magnetic field and plasma environment, and if possible on Ganymede s neutral atmosphere.
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- 2011
17. An equatorial oscillation in Saturn's middle atmosphere
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Fouchet, T., Guerlet, S., Strobel, D. F., Simon-Miller, A. A., Bézard, B., and Flasar, F. M.
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- 2008
- Full Text
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18. The Dust Halo of Saturn's Largest Icy Moon, Rhea
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Jones, G. H., Roussos, E., Krupp, N., Beckmann, U., Coates, A. J., Crary, F., Dandouras, I., Dikarev, V., Dougherty, M. K., Garnier, P., Hansen, C. J., Hendrix, A. R., Hospodarsky, G. B., Johnson, R. E., Kempf, S., Khurana, K. K., Krimigis, S. M., Krüger, H., Kurth, W. S., Lagg, A., McAndrews, H. J., Mitchell, D. G., Paranicas, C., Postberg, F., Russell, C. T., Saur, J., Sei, M., Spahn, F., Srama, R., Strobel, D. F., Tokar, R., Wahlund, J.-E., Wilson, R. J., Woch, J., and Young, D.
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- 2008
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19. Io's Atmospheric Response to Eclipse: UV Aurorae Observations
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Retherford, K. D., Spencer, J. R., Stern, S. A., Saur, J., Strobel, D. F., Steffl, A. J., Gladstone, G. R., Weaver, H. A., Cheng, A. F., Parker, J. Wm., Slater, D. C., Versteeg, M. H., Davis, M. W., Bagenal, F., Throop, H. B., Lopes, R. M. C., Reuter, D. C., Lunsford, A., Conard, S. J., Young, L. A., and Moore, J. M.
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- 2007
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20. Titan's Atmospheric Temperatures, Winds, and Composition
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Flasar, F. M., Achterberg, R. K., Conrath, B. J., Gierasch, P. J., Kunde, V. G., Nixon, C. A., Bjoraker, G. L., Jennings, D. E., Romani, P. N., Simon-Miller, A. A., Bézard, B., Coustenis, A., Irwin, P. G. J., Teanby, N. A., Brasunas, J., Pearl, J. C., Segura, M. E., Carlson, R. C., Mamoutkine, A., Schinder, P. J., Barucci, A., Courtin, R., Fouchet, T., Gautier, D., Lellouch, E., Marten, A., Prangé, R., Vinatier, S., Strobel, D. F., Calcutt, S. B., Read, P. L., Taylor, F. W., Bowles, N., Samuelson, R. E., Orton, G. S., Spilker, L. J., Owen, T. C., Spencer, J. R., Showalter, M. R., Ferrari, C., Abbas, M. M., Raulin, F., Edgington, S., Ade, P., and Wishnow, E. H.
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- 2005
21. Temperatures, Winds, and Composition in the Saturnian System
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Flasar, F. M., Achterberg, R. K., Conrath, B. J., Pearl, J. C., Bjoraker, G. L., Jennings, D. E., Romani, P. N., Simon-Miller, A. A., Kunde, V. G., Nixon, C. A., Bézard, B., Orton, G. S., Spilker, L. J., Spencer, J. R., Irwin, P. G. J., Teanby, N. A., Owen, T. C., Brasunas, J., Segura, M. E., Carlson, R. C., Mamoutkine, A., Gierasch, P. J., Schinder, P. J., Showalter, M. R., Ferrari, C., Barucci, A., Courtin, R., Coustenis, A., Fouchet, T., Gautier, D., Lellouch, E., Marten, A., Prangé, R., Strobel, D. F., Calcutt, S. B., Read, P. L., Taylor, F. W., Bowles, N., Samuelson, R. E., Abbas, M. M., Raulin, F., Ade, P., Edgington, S., Pilorz, S., Wallis, B., and Wishnow, E. H.
- Published
- 2005
22. Jupiter's Atmospheric Composition from the Cassini Thermal Infrared Spectroscopy Experiment
- Author
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Kunde, V. G., Flasar, F. M., Jennings, D. E., Bézard, B., Strobel, D. F., Conrath, B. J., Nixon, C. A., Bjoraker, G. L., Romani, P. N., Achterberg, R. K., Simon-Miller, A. A., Irwin, P., Brasunas, J. C., Pearl, J. C., Smith, M. D., Orton, G. S., Gierasch, P. J., Spilker, L. J., Carlson, R. C., Mamoutkine, A. A., Calcutt, S. B., Read, P. L., Taylor, F. W., Fouchet, T., Parrish, P., Barucci, A., Courtin, R., Coustenis, A., Gautier, D., Lellouch, E., Marten, A., Prangé, R., Biraud, Y., Ferrari, C., Owen, T. C., Abbas, M. M., Samuelson, R. E., Raulin, F., Ade, P., Césarsky, C. J., Grossman, K. U., and Coradini, A.
- Published
- 2004
23. Volcanically emitted sodium chloride as a source for Io's neutral clouds and plasma torus
- Author
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Lellouch, E., Paubert, G., Moses, J. I, Schneider, N. M., and Strobel, D. F.
- Published
- 2003
24. Far-Ultraviolet Imaging Spectroscopy of Io's Atmosphere with HST/STIS
- Author
-
Roesler, F. L., Moos, H. W., Oliversen, R. J., Woodward, R. C., Retherford, K. D., Scherb, F., McGrath, M. A., Smyth, W. H., Feldman, P. D., and Strobel, D. F.
- Published
- 1999
25. The Thermal Structure of Triton's Middle Atmosphere
- Author
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Elliot, J. L, Strobel, D. F, Zhu, X, Stansberry, J. A, Wasserman, L. H, and Franz, O. G
- Subjects
Lunar And Planetary Science And Exploration - Abstract
The atmospheric structure of Triton in the altitude range 25-150 kilometers shows an unexpectedly steep thermal gradient of 0.26 K per kilometer above 50 kilometer altitude, with a nearly isothermal profile below. The upper part of the profile can be explained by downward conduction of heat deposited by magnetospheric electrons and solar UV. However, the atmospheric temperature below 50 kilometers is too cold for identified radiative processes to dispose of the inferred heat flux (0.0012 erg per square centimeter per second) from the upper atmosphere. This implies that either the atmosphere is not in a steady state and/or an unidentified cooling mechanism is at work in the altitude range 25-50 kilometers. When extrapolated to the surface, the inversion results yield a pressure of 19.0 sup (+1.8) sub (-1.5), mubar, about 5mubar greater than that observed by Voyager.
- Published
- 1999
- Full Text
- View/download PDF
26. Implications of Satellite OH Observations for Middle Atmospheric H (2) O and Ozone
- Author
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Summers, M. E., Conway, R. R., Siskind, D. E., Stevens, M. H., Offermann, D., Riese, M., Preusse, P., Strobel, D. F., and Russell, J. M.
- Published
- 1997
27. Detection of an oxygen atmosphere on Jupiter's moon Europa
- Author
-
Hall, D. T., Strobel, D. F., Feldman, P. D., McGrath, M. A., and Weaver, H. A.
- Published
- 1995
28. Chemical and thermal response of Jupiter's atmosphere following the impact of comet Shoemaker-Levy 9
- Author
-
Lellouch, E., Paubert, G., Moreno, R., Festou, M. C., Bezard, B., Bockelee-Morvan, D., Colom, P., Crovisier, J., Encrenaz, T., Gautier, D., Marten, A., Despois, D., Strobel, D. F., and Sievers, A.
- Published
- 1995
29. Extreme ultraviolet explorer satellite observation of Jupiter's Io plasma torus
- Author
-
Hall, D. T, Gladstone, G. R, Moos, H. W, Bagenal, F, Clarke, J. T, Feldman, P. D, Mcgrath, M. A, Schneider, N. M, Shemansky, D. E, and Strobel, D. F
- Subjects
Astronomy - Abstract
We present the first Extreme Ultraviolet Explorer (EUVE) satellite observation of the Jupiter system, obtained during the 2 day period 1993 March 30 through April 1, which shows a rich emission-line spectrum from the Io plasma torus spanning wavelengths 370 to 735 A. The emission features correspond primarily to known multiplets of oxygen and sulfur ions, but a blended feature near 372 A is a plausible Na II transition. The summed detected energy flux of (7.2 +/- 0.2) x 10(exp -11) ergs/sq cm(s) corresponds to a radiated power of approximately equal to 4 x 10(exp 11) W in this spectral range. All ansa emissions show a distinct dawn-dusk brightness asymmetry and the measured dusk/dawn ratio of the bright S III lambda-680 feature is 2.3 +/- 0.3, significantly larger than the ratio measured by the Voyager spacecraft ultraviolet (UV) instruments. A preliminary estimate of ion partitioning indicates that the oxygen/sulfur ion ratio is approximately equal to 2, compared to the value approximately equal to 1.3 measured by Voyager, and that (Na(+))/(e) greater than 0.01.
- Published
- 1994
- Full Text
- View/download PDF
30. Hopkins Ultraviolet Telescope determination of the Io torus electron temperature
- Author
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Hall, D. T, Bednar, C. J, Durrance, S. T, Feldman, P. D, Mcgrath, M. A, Moos, H. W, and Strobel, D. F
- Subjects
Astronomy - Abstract
Sulfur ion emissions from the Io plasma torus observed by the Hopkins Ultraviolet Telescope (HUT) in 1990 December have been analyzed to determine the effective temperature of the exciting electrons. Spectra were obtained with a long slit that extended from 3.1 to 8.7 Jupiter radii R(sub J) on both dawn and dusk torus ansae. The average temperature of electrons exciting S(2+) emissions from the dawn ansa is (4800 +/- 2400) K lower than on the dusk ansa, a dawn-dusk asymmetry comparable in both sign and magnitude to that measured by the Voyager Ultraviolet Spectrograph (UVS) experiment. Emissions from S(2+) ions are generated in a source region with electron temperatures in the range 32,000-56,000 K; S(3+) ion emissions are excited by electrons that average 20,000-40,000 K hotter. This distinct difference suggests that the S(3+) emission source region is spatially separate from the S(2+) source region. Estimated relative aperture filling factors suggest that the S(3+) emissions originate from a region more extended out of the centrifugal plane than the S(2+) emissions.
- Published
- 1994
- Full Text
- View/download PDF
31. The spectrum of the Jovian dayglow observed at 3 A resolution with the Hopkins ultraviolet telescope
- Author
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Feldman, P. D, Mcgrath, M. A, Moos, H. W, Durrance, S. T, Strobel, D. F, and Davidsen, A. F
- Subjects
Lunar And Planetary Exploration - Abstract
Ultraviolet spectra of the Jovian equatorial dayglow in the spectral range 830-1850 A were obtained at about 3 A resolution. The observed spectrum is dominated by electron impact excitation of the H2 Lyman and Werner band systems. Solar Lyman-beta induced fluorescence in the (6, nu-double prime) Lyman band progression is clearly identified in five distinct P(1) lines, and the contribution of solar fluorescence to the total 2.3 kR slit-averaged H2 emission rate is estimated to be 17-22 percent. The electron excitation spectrum is characterized by a relative weakness of the Werner band system and the absence of cascade contributions to the Lyman system and is very similar to that of the south polar aurora. The integrated H2 emission rate in the 900-1100 A band is a factor of two lower than that measured by the Voyager UVS. Based on model calculations, photoelectron excitation does not appear able to account for the amount of observed electron-excited H2 emission.
- Published
- 1993
- Full Text
- View/download PDF
32. A model study of the response of mesospheric ozone to short-term solar ultraviolet flux variations
- Author
-
Summers, M. E, Bevilacqua, R. M, Strobel, D. F, Zhu, Xun, Deland, M. T, Allen, M, and Keating, G. M
- Subjects
Geophysics - Abstract
An investigation is conducted in order to determine the relative importance of several modeled processes in controlling the magnitude and phase of the mesospheric ozone response. A detailed one-dimensional modeling study of the mesospheric ozone response to solar UV flux variations is conducted to remove some of the deficiencies in previous studies. This study is also used to examine specifically the importance of solar zenith angle, self-consistent calculation of water vapor abundance, and temperature feedback with a nonlocal thermodynamic equilibrium radiation model. The photochemical model is described, and the assumptions made for the purpose of comparing model results with the observed ozone response obtained from a statistical analysis of Solar Mesosphere Explorer data (Keating et al., 1987) are discussed. The numerical results for the theoretical ozone response are presented. The results of selected time-dependent calculations are considered to illustrate the degree to which a relatively simple model of the mesosphere is able to capture the major characteristics of the observed response.
- Published
- 1990
33. The ionosphere of Triton
- Author
-
Majeed, T, Mcconnell, J. C, Strobel, D. F, and Summers, M. E
- Subjects
Lunar And Planetary Exploration - Abstract
A model of the atmospheric temperature structure and composition inferred from the Voyager (UVS) solar occultations was used together with a one-dimensional chemical diffusive model to interpret the Voyager Radio Science Spectrometer (RSS) ingress measurements of Triton's electron density. Although N2(+) is the major ion created, N(+) produced by dissociative ionization is the dominant ion. Reaction of thermospheric H2, produced by Lyman-alpha dissociation of CH4 in the lower atmosphere, is the major loss for N(+) ions and maintains these ions in PCSS below 600 km. Solar EUV ionization cannot generate electron densities at the magnitude measured by the RSS experiment and an additional ionization source about 3 x 10 to the 8th ions/sq cm per sec is required. The ionosphere may undergo a transition from PCSS to diffusive control if the N(+) ion production rates were greater than the H2 flux derived from CH4. In this case, the upward flowing H2 is totally converted to H by reaction with N(+) and the remaining N(+) ions recombine radiatively to create an ionosphere under diffusive control above the peak.
- Published
- 1990
34. Long-term study of longitudinal dependence in primary particle precipitation in the north Jovian aurora
- Author
-
Livengood, T. A, Strobel, D. F, and Moos, H. W
- Subjects
Lunar And Planetary Exploration - Abstract
The wavelength-dependent absorption apparent in IUE spectra of the north Jovian aurora is analyzed to determine the column density of hydrocarbons above the altitude of the FUV auroral emission. Both the magnetotail and torus auroral zone models are considered in estimating zenith angles, with very similar results obtained for both models. It is found that the hydrocarbon column density above the FUV emission displays a consistent dependence on magnetic longitude, with the peak density occurring approximately coincident with the peak in the observed auroral intensity. Two distinct scenarios for the longitude dependence of the column density are discussed. In one, the Jovian upper atmosphere is longitudinally homogeneous, and the variation in optical depth is due to a variation in penetration, and thus energy, of the primary particles. In the other, the energy of the primaries is longitudinally homogeneous, and it is aeronomic properties which change, probably due to auroral heating.
- Published
- 1990
35. Constraining the IMF at Pluto Using New Horizons SWAP Data and Hybrid Simulations.
- Author
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Barnes, N. P., Delamere, P. A., Strobel, D. F., Bagenal, F., McComas, D. J., Elliott, H. A., Valek, P., Weaver, H. A., Ennico, K., Young, L. A., and Stern, S. A.
- Subjects
HYBRID computer simulation ,SWAPS (Finance) ,INTERPLANETARY magnetic fields ,COSMIC magnetic fields ,HEAVY ions - Abstract
New Horizons did not carry a magnetometer, so there is no direct way to know the strength of the Interplanetary Magnetic Field (IMF) at the time of the flyby. Using a hybrid model together with a detailed model of the Solar Wind Around Pluto (SWAP) instrument (McComas et al., 2007, https://doi.org/10.1007/s11214-007-9205-3) we have identified three observables that are sensitive to IMF strength: the width of Pluto's heavy ion tail, the energy of heavy ions, and the profile of thermal pressure along the New Horizons trajectory. By comparing simulation to data we infer that the IMF strength was most likely near or below ∼0.1 nT. We also show that the shell distribution of Interstellar Pickup Ions is important for reproducing these observations due to its effect on global pressure balance. Key Points: Numerical experiments suggest that an IMF strength near or below 0.1 nT is consistent with New Horizons dataHigh plasma beta in the wake adequately explains the broad heavy ion tail that was observedThe shell distribution of interplanetary pickup ions is important for understanding Pluto's plasma wake [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
36. Ultraviolet spectrometer experiment for the Voyager mission
- Author
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Broadfoot, A. L., Sandel, B. R., Shemansky, D. E., Atreya, S. K., Donahue, T. M., Moos, H. W., Bertaux, J. L., Blamont, J. E., Ajello, J. M., Strobel, D. F., McConnell, J. C., Dalgarno, A., Goody, R., McElroy, M. B., and Yung, Y. L.
- Published
- 1977
- Full Text
- View/download PDF
37. Pluto's interaction with the solar wind.
- Author
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McComas, D. J., Elliott, H. A., Weidner, S., Valek, P., Zirnstein, E. J., Bagenal, F., Delamere, P. A., Ebert, R. W., Funsten, H. O., Horanyi, M., McNutt, R. L., Moser, C., Schwadron, N. A., Strobel, D. F., Young, L. A., Ennico, K., Olkin, C. B., Stern, S. A., and Weaver, H. A.
- Published
- 2016
- Full Text
- View/download PDF
38. Diurnal variations of mesospheric ozone obtained by ground-based microwave radiometry
- Author
-
Zommerfelds, W. C, Kunzi, K. F, Summers, M. E, Bevilacqua, R. M, and Strobel, D. F
- Subjects
Geophysics - Abstract
From December 1986 until April 1987 ground-based microwave observations of the diurnal variation of mesospheric ozone were made over Bern, Switzerland. These data were of sufficient quality to define the characteristics diurnal behavior of the ozone mixing ratio during winter and equinoctial conditions. The observed diurnal variation of ozone peaks at about 74 km, where its amplitude is about a factor of 6. At 65 km the observed diurnal variation is a factor of 3, whereas at 55 km it is only a factor of 1.4. One-dimensional model calculations accurately reproduce the relative diurnal variation of ozone at equinox, suggesting that the model value of the ozone photolysis rate coefficient is accurate to better that 10 percent. For winter conditions, however, the model underpredicts the observed relative diurnal variation by a factor of 2; a major part of this discrepancy is due to an observed postmidnight increase in ozone. Various suggested changes in model parameters to better produce the ozone abundance vertical profile result in only small differences in the relative diurnal variation, indicating that these observations do not provide a sensitive test of the mesospheric chemistry controlling the abundance of odd oxygen.
- Published
- 1989
39. The structure of Io's thermal corona and implications for atmospheric escape
- Author
-
Summers, M. E, Strobel, D. F, Yung, Y. L, Trauger, J. T, and Mills, F
- Subjects
Lunar And Planetary Exploration - Abstract
A steady-state model of Io's exospheric corona and its interaction with the Io plasma torus is used to study the escape of species from Io's atmosphere. It is found that atmospheric sputtering is the major escape mechanism for models in which the plasma flow reaches the critical level, and that such models produce total mass-loading rates an order of magnitude larger than values inferred from observations. The results suggest the presence of an extended Na coronal component in the thermal exosphere, and are consistent with an O-dominated corona, an exospheric temperature of about 1000 K, an Na critical level mixing ratio of 0.001, and a critical level radius of about 1.5 Io radii.
- Published
- 1989
- Full Text
- View/download PDF
40. Io: IUE observations of its atmosphere and the plasma torus
- Author
-
Ballester, G. E, Moos, H. W, Feldman, P. D, Strobel, D. F, Skinner, T. E, Bertaux, J.-L, and Festou, M. C
- Subjects
Astronomy - Abstract
Two of the main components of the atmosphere of Io, neutral oxygen and sulfur, were detected with the IUE. Four observations yield brightnesses that are similar, regardless of whether the upstream or the downstream sides of the torus plasma flow around Io is observed. A simple model requires the emissions to be produced by the interaction of O and S columns in the exospheric range with 2 eV electrons. Cooling of the 5 eV torus electrons is required prior to their interaction with the atmosphere of Io. Inconsistencies in the characteristics of the spectra that cannot be accounted for in this model require further analysis with improved atomic data. The Io plasma torus was monitored with the IUE. The long-term stability of the warm torus is established. The observed brightnesses were analyzed using a model of the torus, and variations of less than 30 percent in the composition are observed, the quantitative results being model dependent.
- Published
- 1988
41. Detection of neutral oxygen and sulfur emissions near Io using IUE
- Author
-
Ballester, G. E, Moos, H. W, Feldman, P. D, Strobel, D. F, Summers, M. E, Bertaux, J.-L, Skinner, T. E, Festou, M. C, and Lieske, J. H
- Subjects
Lunar And Planetary Exploration - Abstract
IUE spectra have shown several O I and S I emissions near Io. The optical thickness of the S I 1814 A multiplet indicates that the S column density is greater than about 2 x 10 to the 12th/sq cm. The presence of an S I 1479 A feature suggests that electron collisions with SO2 could be a major source of the emissions. It is likely that particle excitation in the denser collision-dominated part of the atmosphere is also responsible for a substantial part of the observed emissions.
- Published
- 1987
- Full Text
- View/download PDF
42. Analysis of Raman scattered Ly-alpha emissions from the atmosphere of Uranus
- Author
-
Yelle, R. V, Doose, L. R, Tomasko, M. G, and Strobel, D. F
- Subjects
Lunar And Planetary Exploration - Abstract
A line at 1280 A, due to Raman scattering of solar Lyman alpha (Ly-alpha) in the atmosphere of Uranus, has been detected by the Voyager Ultraviolet Spectrometer. The measured intensity of 40 + or - 20 R implies that 200 R to 500 R of the measured 1500 R Ly-alpha intensity at the subsolar point is due to Rayleigh scattering of the solar line. The presence of Rayleigh and Raman scattering at 1216 A suggests that the Uranian atmosphere is largely devoid of absorbing hydrocarbons above the 0.5 mbar level. The most natural explanation of this depletion is very weak vertical mixing equivalent to an eddy coefficient on the order of 200 sq cm/sec between 0.5 mbar and 100 mbar.
- Published
- 1987
43. Clouds, aerosols, and photochemistry in the Jovian atmosphere
- Author
-
West, R. A, Strobel, D. F, and Tomasko, M. G
- Subjects
Lunar And Planetary Exploration - Abstract
An assessment is made of the development status of concepts for cloud and aerosol compositions, vertical and horizontal distributions, and microphysical properties, in the Jovian upper troposphere and stratosphere. Attention is given to several key photochemical species' relationships to aerosol formation as well as their transport process implications, treating photochemistry in the context of comparative planetology and noting differences and similarities among the outer planet atmospheres; since this approach emphasizes observational data, a variegated assortment of ground-based and spacecraft observations is assembled. Current views on the tropospheric distribution of clouds are challenged, and a rationale is presented for alternative accounts.
- Published
- 1986
- Full Text
- View/download PDF
44. Energy balance constraints on gravity wave induced eddy diffusion in the mesosphere and lower thermosphere
- Author
-
Strobel, D. F, Apruzese, J. P, and Schoeberl, M. R
- Subjects
Geophysics - Abstract
The constraints on turbulence improved by the mesospheric heat budget are reexamined, and the sufficiency of the theoretical evidence to support the hypothesis that the eddy Prandtl number is greater than one in the mesosphere is considered. The mesopause thermal structure is calculated with turbulent diffusion coefficients commonly used in chemical models and deduced from mean zonal wind deceleration. It is shown that extreme mesopause temperatures of less than 100 K are produced by the large net cooling. The results demonstrate the importance of the Prandtl number for mesospheric turbulence.
- Published
- 1985
45. Energy partitioning in the Io plasma torus
- Author
-
Smith, R. A and Strobel, D. F
- Subjects
Lunar And Planetary Exploration - Abstract
The Io plasma torus, which emits substantial amounts of EUV radiation from multiply ionized oxygen and sulfur, represents one of the significant discoveries of the Voyager 1 mission. The present study is concerned with the effects of various physical processes on the density and energy partitioning of the Io plasma torus. For the ions the dominant effects, which have different relative importance in different parameter regimes, are electron impact ionization, charge exchange, electron-ion collisions, and confinement time loss. Attention is given to a physical model, the solution of the quasi-linear equations, the obtained results, and an interpretation of observations in relation to the model results.
- Published
- 1985
46. Middle atmosphere modeling
- Author
-
Strobel, D. F
- Subjects
Geophysics - Abstract
Breaking gravity waves generate and maintain a background level of turbulence which is capable of producing substantial cooling and/or heating in the upper mesosphere and lower thermosphere. The net thermodynamic effect of breaking gravity waves is critically dependent on the eddy Prandt number (P sub t) applicable to mesospheric turbulence. When P sub t is approximately 1, the calculations of the heat budget for the mesopause region imply that the globally averaged eddy or turbulent diffusion coefficient cannot exceed .000001 sq cm/s. This upper limit on turbulant diffusion applies to both potential temperature transport and chemically inert tracer transport when radiative damping is neglible. For chemically active species larger diffusion coefficients are permitted, because the effective eddy diffusion coefficient is increased by an additive term L/2 gamma (sup 2), where L is the chemical loss rate and gamma is the vertical wavenumber. For P sub t is approximately 4 to 6, the turbulent diffusion of momentum (D sub M) is sufficiently greater than the turbulent diffusion of heat (D sub H) that the conversion of gravity wave energy to heat with high efficiency nearly balances the divergence of the downward eddy heat flux in the wave breaking zone. Therefore the heat budget of the mesopause region would no longer provide a powerful and useful constraint on D sub H. If P sub t exceeds 6 with high efficiency for energy conversion to heat, gravity waves would heat the mesosphere throughout the wave breaking region.
- Published
- 1985
47. The photochemistry of the atmospheres of the outer planets and their satellites
- Author
-
Strobel, D. F
- Subjects
Lunar And Planetary Exploration - Abstract
The thermal structure and composition of Uranus, Neptune, Saturn, Jupiter, Titan, and Io are described. Molecular hydrogen is the dominant constituent in the atmosphere of the outer planets. The hydrogen and helium, methane, ammonia and phosphine, and carbon monoxide photochemical reactions of the outer planets are studied. The importance of Jupiter's lightning as a source of organic matter is examined. The aerosol and haze layers of the stratosphere of Jupiter, Saturn, Neptune, and Uranus are observed. The photochemistry of Titan's atmosphere, which includes nitrogen, methane, carbon monoxide, and carbon dioxide reactions, is analyzed. The SO2 atmosphere on Io is discussed.
- Published
- 1985
48. Parameterization of IR cooling in a middle atmosphere. II Non-LTE radiative transfer and the globally averaged temperature of the mesosphere and lower thermosphere
- Author
-
Apruzese, J. P, Strobel, D. F, and Schoeberl, M. R
- Subjects
Meteorology And Climatology - Published
- 1984
49. Titan
- Author
-
Hunten, D. M, Tomasko, M. G, Flasar, F. M, Samuelson, R. E, Strobel, D. F, and Stevenson, D. J
- Subjects
Lunar And Planetary Exploration - Abstract
It is pointed out that Titan, which is the second largest satellite in the solar system, is considerably larger than Mercury. It is made unique by its dense atmosphere, which consists mainly of nitrogen, although a substantial component of methane is present. The basic properties of Titan are summarized in a table. Many of the data were obtained during the close pass of Voyager 1 in November 1980. The atmospheric temperature decreases from its surface value of 94 K at a pressure of 1500 mbar to a minimum of 71 K at a height of 42 km and a pressure of 128 mbar. Details of atmospheric composition and thermal structure are discussed, taking into account chemical identifications and abundances, the vertical temperature structure, the horizontal temperature and opacity structure, and the radiative equilibrium. The upper atmosphere composition and temperature is considered along with the properties of aerosols, and meteorology and atmospheric dynamics. Titan's interior has an average density of 1.88 g per cu cm. Attention is given to Titan's surface and interior, and its formation.
- Published
- 1984
50. Nonzonal gravity wave breaking in the winter mesosphere
- Author
-
Schoeberl, M. R and Strobel, D. F
- Subjects
Geophysics - Abstract
The steady state gravity wave model of Schoeberl et al. (1983) is extended to compute wave breaking by disturbances originating at the earth's surface. For winter and summer mean zonal wind profiles, no waves reach the mesosphere unless the absolute value of the zonally averaged perturbed zonal velocity minus c is greater than approximately 20 m/sec. Gravity waves with c = 0 can only reach the winter mesosphere if planetary scale waves are present in the troposphere and the lower stratosphere, to provide strong zonal wind channels for upward wave propagation. This results in nonzonal wave breaking in the mesosphere which could provide in situ forcing of planetary waves. Dissipation of gravity waves by molecular viscosity and conduction can provide significant deceleration and heating/cooling in the 85-105 km region.
- Published
- 1984
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