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672 results on '"Wenzel, K. P."'

1. GOTO065054+593624: a peculiar dwarf nova identified in real time via Kilonova Seekers

Author

Killestein, T. L., Ramsay, G., Kennedy, M., Kelsey, L., Steeghs, D., Littlefair, S., Godson, B., Lyman, J., Pursiainen, M., Warwick, B., Krawczyk, C., Nuttall, L. K., Wickens, E., Alexandrov, S. D., da Silva, C. M., Leadbeater, R., Ackley, K., Dyer, M. J., Jiménez-Ibarra, F., Ulaczyk, K., Galloway, D. K., Dhillon, V. S., O'Brien, P., Noysena, K., Kotak, R., Breton, R. P., Pallé, E., Pollacco, D., Kumar, A., O'Neill, D., Butterley, T., Wilson, R., Mattila, S., Sahu, A., Starling, R., Wang, C. Y., Liu, Q., Li, A., Dai, Z., Feng, H., Yuan, W., Billington, R., Bull, A. G., Gaudenzi, S., Gonano, V., Krawczyk, H., Mazzucato, M. T., Pasqua, A., Campos, J. A. da Silva, Torres-Guerrero, M., Antonov, N. N., Bean, S. J., Boeneker, E. T., Brincat, S. M., Darlington, G. S., Dubois, F., Hambsch, F. -J., Messier, D., Oksanen, A., Poyner, G., Romanov, F. D., Sharp, I. D., Tordai, T., Vanmunster, T., and Wenzel, K.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Dwarf novae are a crucial astrophysical laboratory for probing the nature of accretion, binary mass transfer, and binary evolution -- yet their diverse observational characteristics continue to challenge our theoretical understanding. We here present the discovery of, and subsequent observing campaign on GOTO065054+593624 (hereafter GOTO0650), a dwarf nova of the WZ Sge type, discovered in real-time by citizen scientists via the Kilonova Seekers citizen science project. An extensive dataset charts the photometric and spectroscopic evolution of this object, covering the first two months of its 2024 superoutburst. GOTO0650 shows a complete absence of visible emission lines during the high state, strong H and barely-detected He~II emission, and high-amplitude echo outbursts with a rapidly decreasing timescale that together do not neatly fit in with our current view of cataclysmic variables. The comprehensive dataset presented here not only underscores the uniqueness of this dwarf nova and marks it as a candidate period bouncer, but also highlights the important contribution that citizen scientists can make to the study of Galactic transients., Comment: 14 pages, 14 figures. Submitted to A&A

Published
2025

3. V392 Persei: a \gamma-ray bright nova eruption from a known dwarf nova

Author

Murphy-Glaysher, F. J., Darnley, M. J., Harvey, É. J., Newsam, A. M., Page, K. L., Starrfield, S., Wagner, R. M., Woodward, C. E., Terndrup, D. M., Kafka, S., Heras, T. Arranz, Berardi, P., Bertrand, E., Biernikowicz, R., Boussin, C., Boyd, D., Buchet, Y., Bundas, M., Coulter, D., Dejean, D., Diepvens, A., Dvorak, S., Edlin, J., Eenmae, T., Eggenstein, H., Fournier, R., Garde, O., Gout, J., Janzen, D., Jordanov, P., Kiiskinen, H., Lane, D., Larochelle, R., Leadbeater, R., Mankel, D., Martineau, G., Miller, I., Modic, R., Montier, J., Aimar, M. Morales, Muyllaert, E., Nogues, R. Naves, O'Keeffe, D., Oksanen, A., Pyatnytskyy, M., Rast, R., Rodgers, B., Perez, D. Rodriguez, Schorr, F., Schwendeman, E., Shadick, S., Sharpe, S., Alfaro, F. Soldán, Sove, T., Stone, G., Tordai, T., Venne, R., Vollmann, W., Vrastak, M., and Wenzel, K.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

V392 Persei is a known dwarf nova (DN) that underwent a classical nova eruption in 2018. Here we report ground-based optical, Swift UV and X-ray, and Fermi-LAT \gamma-ray observations following the eruption for almost three years. V392 Per is one of the fastest evolving novae yet observed, with a $t_2$ decline time of 2 days. Early spectra present evidence for multiple and interacting mass ejections, with the associated shocks driving both the \gamma-ray and early optical luminosity. V392 Per entered Sun-constraint within days of eruption. Upon exit, the nova had evolved to the nebular phase, and we saw the tail of the super-soft X-ray phase. Subsequent optical emission captured the fading ejecta alongside a persistent narrow line emission spectrum from the accretion disk. Ongoing hard X-ray emission is characteristic of a standing accretion shock in an intermediate polar. Analysis of the optical data reveals an orbital period of 3.230 \pm 0.003 days, but we see no evidence for a white dwarf (WD) spin period. The optical and X-ray data suggest a high mass WD, the pre-nova spectral energy distribution (SED) indicates an evolved donor, and the post-nova SED points to a high mass accretion rate. Following eruption, the system has remained in a nova-like high mass transfer state, rather than returning to the pre-nova DN low mass transfer configuration. We suggest that this high state is driven by irradiation of the donor by the nova eruption. In many ways, V392 Per shows similarity to the well-studied nova and DN GK Persei., Comment: Accepted by MNRAS. 20 pages including references, with 37 pages of supplementary material

Published
2022
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5. Meter-scale thermal contraction crack polygons on the nucleus of comet 67P/Churyumov-Gerasimenko

Author

Auger, A.-T., Groussin, O., Jorda, L., El-Maarry, M.R., Bouley, S., Séjourné, A., Gaskell, R., Capanna, C., Davidsson, B., Marchi, S., Höfner, S., Lamy, P.L., Sierks, H., Barbieri, C., Rodrigo, R., Koschny, D., Rickman, H., Keller, H.U., Agarwal, J., A’Hearn, M.F., Barucci, M.A., Bertaux, J.-L., Bertini, I., Cremonese, G., Da Deppo, V., Debei, S., De Cecco, M., Fornasier, S., Fulle, M., Gutiérrez, P.J., Güttler, C., Hviid, S., Ip, W.-H., Knollenberg, J., Kramm, J.-R., Kührt, E., Küppers, M., Lara, L.M., Lazzarin, M., Lopez Moreno, J.J., Marzari, F., Massironi, M., Michalik, H., Naletto, G., Oklay, N., Pommerol, A., Sabau, L., Thomas, N., Tubiana, C., Vincent, J.-B., and Wenzel, K.-P.

Published
2018
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6. The global shape, density and rotation of Comet 67P/Churyumov-Gerasimenko from preperihelion Rosetta/OSIRIS observations

Author

Jorda, L., Gaskell, R., Capanna, C., Hviid, S., Lamy, P., Ďurech, J., Faury, G., Groussin, O., Gutiérrez, P., Jackman, C., Keihm, S.J., Keller, H.U., Knollenberg, J., Kührt, E., Marchi, S., Mottola, S., Palmer, E., Schloerb, F.P., Sierks, H., Vincent, J.-B., A’Hearn, M.F., Barbieri, C., Rodrigo, R., Koschny, D., Rickman, H., Barucci, M.A., Bertaux, J.L., Bertini, I., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., Fornasier, S., Fulle, M., Güttler, C., Ip, W.-H., Kramm, J.R., Küppers, M., Lara, L.M., Lazzarin, M., Lopez Moreno, J.J., Marzari, F., Naletto, G., Oklay, N., Thomas, N., Tubiana, C., and Wenzel, K.-P.

Published
2016
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7. The morphological diversity of comet 67P/Churyumov-Gerasimenko

Author

Thomas, N., Sierks, H., Barbieri, C., Lamy, P. L., Rodrigo, R., Rickman, H., Koschny, D., Keller, H. U., Agarwal, J., A'Hearn, M. F., Angrilli, F., Auger, A.-T., Barucci, M. A., Bertaux, J.-L., Bertini, I., Besse, S., Bodewits, D., Cremonese, G., Da Deppo, V., Davidsson, B., De Cecco, M., Debei, S., El-Maarry, M. R., Ferri, F., Fornasier, S., Fulle, M., Giacomini, L., Groussin, O., Gutierrez, P. J., Güttler, C., Hviid, S. F., Ip, W.-H., Jorda, L., Knollenberg, J., Kramm, J.-R., Kührt, E., Küppers, M., La Forgia, F., Lara, L. M., Lazzarin, M., Moreno, J. J. Lopez, Magrin, S., Marchi, S., Marzari, F., Massironi, M., Michalik, H., Moissl, R., Mottola, S., Naletto, G., Oklay, N., Pajola, M., Pommerol, A., Preusker, F., Sabau, L., Scholten, F., Snodgrass, C., Tubiana, C., Vincent, J.-B., and Wenzel, K.-P.

Published
2015

8. On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko

Author

Sierks, H., Barbieri, C., Lamy, P. L., Rodrigo, R., Koschny, D., Rickman, H., Keller, H. U., Agarwal, J., A'Hearn, M. F., Angrilli, F., Auger, A.-T., Barucci, M. A., Bertaux, J.-L., Bertini, I., Besse, S., Bodewits, D., Capanna, C., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., Ferri, F., Fornasier, S., Fulle, M., Gaskell, R., Giacomini, L., Groussin, O., Gutierrez-Marques, P., Gutiérrez, P. J., Güttler, C., Hoekzema, N., Hviid, S. F., Ip, W.-H., Jorda, L., Knollenberg, J., Kovacs, G., Kramm, J.-R., Kührt, E., Küppers, M., La Forgia, F., Lara, L. M., Lazzarin, M., Leyrat, C., Moreno, J. J. Lopez, Magrin, S., Marchi, S., Marzari, F., Massironi, M., Michalik, H., Moissl, R., Mottola, S., Naletto, G., Oklay, N., Pajola, M., Pertile, M., Preusker, F., Sabau, L., Scholten, F., Snodgrass, C., Thomas, N., Tubiana, C., Vincent, J.-B., Wenzel, K.-P., Zaccariotto, M., and Pätzold, M.

Published
2015

9. Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

Author

Rotundi, A., Sierks, H., Corte, V. Della, Fulle, M., Gutierrez, P. J., Lara, L., Barbieri, C., Lamy, P. L., Rodrigo, R., Koschny, D., Rickman, H., Keller, H. U., López-Moreno, J. J., Accolla, M., Agarwal, J., A'Hearn, M. F., Altobelli, N., Angrilli, F., Barucci, M. A., Bertaux, J.-L., Bertini, I., Bodewits, D., Bussoletti, E., Colangeli, L., Cosi, M., Cremonese, G., Crifo, J.-F., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., Esposito, F., Ferrari, M., Fornasier, S., Giovane, F., Gustafson, B., Green, S. F., Groussin, O., Grün, E., Güttler, C., Herranz, M. L., Hviid, S. F., Ip, W., Ivanovski, S., Jerónimo, J. M., Jorda, L., Knollenberg, J., Kramm, R., Kührt, E., Küppers, M., Lazzarin, M., Leese, M. R., López-Jiménez, A. C., Lucarelli, F., Lowry, S. C., Marzari, F., Epifani, E. Mazzotta, McDonnell, J. A. M., Mennella, V., Michalik, H., Molina, A., Morales, R., Moreno, F., Mottola, S., Naletto, G., Oklay, N., Ortiz, J. L., Palomba, E., Palumbo, P., Perrin, J.-M., Rodríguez, J., Sabau, L., Snodgrass, C., Sordini, R., Thomas, N., Tubiana, C., Vincent, J.-B., Weissman, P., Wenzel, K.-P., Zakharov, V., and Zarnecki, J. C.

Published
2015

10. Global Processes that Determine Cosmic Ray Modulation : Report of Working Group 1

Author

Fisk, L. A., Wenzel, K.-P., Balogh, A., Burger, R. A., Cummings, A. C., Evenson, P., Heber, B., Jokipii, J. R., Krainev, M. B., Kóta, J., Kunow, H., Le Roux, J. A., Mcdonald, F. B., Mckibben, R. B., Potgieter, M. S., Simpson, J. A., Steenberg, C. D., Suess, S., Webber, W. R., Wibberenz, G., Zhang, M., Ferrando, P., Fujii, Z., Lockwood, J. A., Moraal, H., Stone, E. C., Fisk, L. A., editor, Jokipii, J. R., editor, Simnett, G. M., editor, von Steiger, R., editor, and Wenzel, K.-P., editor

Published
1998
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11. Introduction

Author

Fisk, L. A., Jokipii, J. R., Simnett, G. M., Wenzel, K.-P., Fisk, L. A., editor, Jokipii, J. R., editor, Simnett, G. M., editor, von Steiger, R., editor, and Wenzel, K.-P., editor

Published
1998
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12. Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System

Author

Sierks, H., Lamy, P., Barbieri, C., Koschny, D., Rickman, H., Rodrigo, R., A'Hearn, M. F., Angrilli, F., Barucci, M. A., Bertaux, J.-L., Bertini, I., Besse, S., Carry, B., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., De Leon, J., Ferri, F., Fornasier, S., Fulle, M., Hviid, S. F., Gaskell, R. W., Groussin, O., Gutierrez, P., Ip, W., Jorda, L., Kaasalainen, M., Keller, H. U., Knollenberg, J., Kramm, R., Kührt, E., Küppers, M., Lara, L., Lazzarin, M., Leyrat, C., Moreno, J. J. Lopez, Magrin, S., Marchi, S., Marzari, F., Massironi, M., Michalik, H., Moissl, R., Naletto, G., Preusker, F., Sabau, L., Sabolo, W., Scholten, F., Snodgrass, C., Thomas, N., Tubiana, C., Vernazza, P., Vincent, J.-B., Wenzel, K.-P., Andert, T., Pätzold, M., and Weiss, B. P.

Published
2011

13. E-Type Asteroid (2867) Steins as Imaged by OSIRIS on Board Rosetta

Author

Keller, H. U., Barbieri, C., Koschny, D., Lamy, P., Rickman, H., Rodrigo, R., Sierks, H., A'Hearn, M. F., Angrilli, F., Barucci, M. A., Bertaux, J.-L, Cremonese, G., Da Deppo, V., Davidsson, B., De Cecco, M., Debei, S., Fornasier, S., Fulle, M., Groussin, O., Gutierrez, P. J., Hviid, S. F., Ip, W.-H., Jorda, L., Knollenberg, J., Kramm, J. R., Kührt, E., Küppers, M., Lara, L.-M., Lazzarin, M., Moreno, J. Lopez, Marzari, F., Michalik, H., Naletto, G., Sabau, L., Wenzel, K.-P., Bertini, I., Besse, S., Ferri, F., Kaasalainen, M., Lowry, S., Marchi, S., Mottola, S., Sabolo, W., Schröder, S. E., Spjuth, S., and Vernazza, P.

Published
2010
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17. Acceleration and storage of energetic particles in the solar corona

Author

Wenzel, K. -P., Araki, H., editor, Brézin, E., editor, Ehlers, J., editor, Frisch, U., editor, Hepp, K., editor, Jaffe, R. L., editor, Kippenhahn, R., editor, Weidenmüller, H. A., editor, Wess, J., editor, Zittartz, J., editor, Beiglböck, W., editor, Belvedere, G., editor, Rodonò, M., editor, and Simnett, G. M., editor

Published
1994
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21. OSIRIS – The Scientific Camera System Onboard Rosetta

Author

Keller, H. U., Barbieri, C., Lamy, P., Rickman, H., Rodrigo, R., Wenzel, K.-P., Sierks, H., A’Hearn, M. F., Angrilli, F., Angulo, M., Bailey, M. E., Barthol, P., Barucci, M. A., Bertaux, J.-L., Bianchini, G., Boit, J.-L., Brown, V., Burns, J. A., Büttner, I., Castro, J. M., Cremonese, G., Curdt, W., Deppo, V. Da, Debei, S., Cecco, M. De, Dohlen, K., Fornasier, S., Fulle, M., Germerott, D., Gliem, F., Guizzo, G. P., Hviid, S. F., Ip, W.-H., Jorda, L., Koschny, D., Kramm, J. R., Kührt, E., Küppers, M., Lara, L. M., Llebaria, A., López, A., López-Jimenez, A., López-Moreno, J., Meller, R., Michalik, H., Michelena, M. D., Müller, R., Naletto, G., Origné, A., Parzianello, G., Pertile, M., Quintana, C., Ragazzoni, R., Ramous, P., Reiche, K.-U., Reina, M., Rodríguez, J., Rousset, G., Sabau, L., Sanz, A., Sivan, J.-P., Stöckner, K., Tabero, J., Telljohann, U., Thomas, N., Timon, V., Tomasch, G., Wittrock, T., and Zaccariotto, M.

Published
2007
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30. WIND Observations of Suprathermal Particles in the Solar Wind

Author

Lin, R. P., primary, Larson, D., additional, Phan, T., additional, Ergun, R., additional, Mcfadden, J., additional, Anderson, K., additional, Carslon, C., additional, Mccarthy, M., additional, Parks, G. K., additional, Skoug, R., additional, Winglee, R., additional, Rème, H., additional, Lormant, N., additional, Bosqued, J. M., additional, d'Uston, C., additional, Sanderson, T. R., additional, and Wenzel, K.-P., additional

Published
2013
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38. OSIRIS: The Scientific Camera System Onboard Rosetta

Author

Keller, H. U., primary, Barbieri, C., additional, Lamy, P., additional, Rickman, H., additional, Rodrigo, R., additional, Wenzel, K. -P., additional, Sierks, H., additional, A’Hearn, M. F., additional, Angrilli, F., additional, Angulo, M., additional, Bailey, M. E., additional, Barthol, P., additional, Barucci, M. A., additional, Bertaux, J.-L., additional, Bianchini, G., additional, Boit, J.-L., additional, Brown, V., additional, Burns, J. A., additional, Büttner, I., additional, Castro, J. M., additional, Cremonese, G., additional, Curdt, W., additional, Deppo, V. Da, additional, Debei, S., additional, Cecco, M. De, additional, Dohlen, K., additional, Fornasier, S., additional, Fulle, M., additional, Germerott, D., additional, Gliem, F., additional, Guizzo, G. P., additional, Hviid, S. F., additional, Ip, W.-H., additional, Jorda, L., additional, Koschny, D., additional, Kramm, J. R., additional, Kührt, E., additional, Küppers, M., additional, Lara, L. M., additional, Llebaria, A., additional, López, A., additional, López-Jimenez, A., additional, López-Moreno, J., additional, Meller, R., additional, Michalik, H., additional, Michelena, M. D., additional, Müller, R., additional, Naletto, G., additional, Origné, A., additional, Parzianello, G., additional, Pertile, M., additional, Quintana, C., additional, Ragazzoni, R., additional, Ramous, P., additional, Reiche, K.-U., additional, Reina, M., additional, Rodríguez, J., additional, Rousset, G., additional, Sabau, L., additional, Sanz, A., additional, Sivan, J.-P., additional, Stöckner, K., additional, Tabero, J., additional, Telljohann, U., additional, Thomas, N., additional, Timon, V., additional, Tomasch, G., additional, and Wittrock, T., additional

Published
2009
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40. A collision in 2009 as the origin of the debris trail of asteroid P/2010 A2

Author

Snodgrass, Colin, Tubiana, Cecilia, Vincent, Jean-Baptiste, Sierks, Holger, Hviid, Stubbe, Moissl, Richard, Boehnhardt, Hermann, Barbieri, Cesare, Koschny, Detlef, Lamy, Philippe, Rickman, Hans, Rodrigo, Rafael, Carry, Benoît, Lowry, Stephen C., Laird, Ryan J. M., Weissman, Paul R., Fitzsimmons, Alan, Marchi, Simone, A’Hearn, M., Angrilli, F., Barucci, A., Bertaux, J.-L., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., Fornasier, S., Gutiérrez, P., Ip, W.-H., Keller, H. U., Knollenberg, J., Kramm, J. R., Kuehrt, E., Kueppers, M., Lara, L. M., Lazzarin, M., López-Moreno, J. J., Marzari, F., Michalik, H., Naletto, G., Sabau, L., Thomas, N., and Wenzel, K. P.

Published
2010
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41. Global Processes that Determine Cosmic Ray Modulation

Author

Fisk, L. A., Wenzel, K.-P., Balogh, A., Burger, R. A., Cummings, A. C., Evenson, P., Heber, B., Jokipii, J. R., Krainev, M. B., Kóta, J., Kunow, H., Le Roux, J. A., McDonald, F. B., McKibben, R. B., Potgieter, M. S., Simpson, J. A., Steenberg, C. D., Suess, S., Webber, W. R., Wibberenz, G., Zhang, M., Ferrando, P., Fujii, Z., Lockwood, J. A., Moraal, H., and Stone, E. C.

Published
1998
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