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7 results on '"Hörandel J. R."'

1. A large light-mass component of cosmic rays at 1017–1017.5 electronvolts from radio observations

Author

Buitink, S., Corstanje, A., Falcke, H., Hörandel, J. R., Huege, T., Nelles, A., Rachen, J. P., Rossetto, L., Schellart, P., Scholten, O., ter Veen, S., Thoudam, S., Trinh, T. N. G., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J. W., Brouw, W. N., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., Conway, J. E., de Gasperin, F., de Geus, E., Deller, A., Dettmar, R.-J., van Diepen, G., Duscha, S., Eislöffel, J., Engels, D., Enriquez, J. E., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griemeier, J. M., Gunst, A. W., van Haarlem, M. P., Hassall, T. E., Heald, G., Hessels, J. W. T., Hoeft, M., Horneffer, A., Iacobelli, M., Intema, H., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., van Leeuwen, J., Loose, G. M., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mevius, M., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H. J. A., Scaife, A. M. M., Schwarz, D. J., Serylak, M., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Toribio, M. C., Vermeulen, R., Vocks, C., Vogt, C., van Weeren, R. J., Wijers, R. A. M. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., and Zensus, J. A.

Published
2016
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2. Detection and imaging of atmospheric radio flashes from cosmic ray air showers

Author

Falcke, H., Apel, W. D., Badea, A. F., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Buitink, S., Brüggemann, M., Buchholz, P., Butcher, H., Chiavassa, A., Daumiller, K., de Bruyn, A. G., de Vos, C. M., Di Pierro, F., Doll, P., Engel, R., Gemmeke, H., Ghia, P. L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J. R., Horneffer, A., Huege, T., Kampert, K.-H., Kant, G. W., Klein, U., Kolotaev, Y., Koopman, Y., Krömer, O., Kuijpers, J., Lafebre, S., Maier, G., Mathes, H. J., Mayer, H. J., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Obenland, R., Oehlschläger, J., Ostapchenko, S., Over, S., Pepping, H. J., Petcu, M., Petrovic, J., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Schoonderbeek, G., Sima, O., Stümpert, M., Toma, G., Trinchero, G. C., Ulrich, H., Valchierotti, S., van Buren, J., van Cappellen, W., Walkowiak, W., Weindl, A., Wijnholds, S., Wochele, J., Zabierowski, J., Zensus, J. A., and Zimmermann, D.

Published
2005

3. Needle-like structures discovered on positively charged lightning branches

Author

Hare, B. M., primary, Scholten, O., additional, Dwyer, J., additional, Trinh, T. N. G., additional, Buitink, S., additional, ter Veen, S., additional, Bonardi, A., additional, Corstanje, A., additional, Falcke, H., additional, Hörandel, J. R., additional, Huege, T., additional, Mitra, P., additional, Mulrey, K., additional, Nelles, A., additional, Rachen, J. P., additional, Rossetto, L., additional, Schellart, P., additional, Winchen, T., additional, Anderson, J., additional, Avruch, I. M., additional, Bentum, M. J., additional, Blaauw, R., additional, Broderick, J. W., additional, Brouw, W. N., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, Fallows, R. A., additional, de Geus, E., additional, Duscha, S., additional, Eislöffel, J., additional, Garrett, M. A., additional, Grießmeier, J. M., additional, Gunst, A. W., additional, van Haarlem, M. P., additional, Hessels, J. W. T., additional, Hoeft, M., additional, van der Horst, A. J., additional, Iacobelli, M., additional, Koopmans, L. V. E., additional, Krankowski, A., additional, Maat, P., additional, Norden, M. J., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pandey, V. N., additional, Pekal, R., additional, Pizzo, R., additional, Reich, W., additional, Rothkaehl, H., additional, Röttgering, H. J. A., additional, Rowlinson, A., additional, Schwarz, D. J., additional, Shulevski, A., additional, Sluman, J., additional, Smirnov, O., additional, Soida, M., additional, Tagger, M., additional, Toribio, M. C., additional, van Ardenne, A., additional, Wijers, R. A. M. J., additional, van Weeren, R. J., additional, Wucknitz, O., additional, Zarka, P., additional, and Zucca, P., additional

Published
2019
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4. Correction: Corrigendum: A large light-mass component of cosmic rays at 10.sup.17-10.sup.17.5 electronvolts from radio observations

Author

Buitink, S., Corstanje, A., Falcke, H., Hörandel, J. R., Huege, T., Nelles, A., and Rachen, J. P.

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Nature 531, 70-73 (2016); doi:10.1038/nature16976 In this Letter, we omitted to cite preliminary results from the low-energy extension of the Pierre Auger Observatory, as presented at the International Cosmic Ray Conference 2015 (ref. 1). Figure 1 of this Corrigendum shows measurements of the average value of Xmax for the Low Frequency Array (LOFAR), and earlier experiments using different techniques, now including the data from the Pierre Auger Observatory1, specifically the contribution of A., Author(s): S. Buitink, A. Corstanje, H. Falcke, J. R. Hörandel, T. Huege, A. Nelles, J. P. Rachen, L. Rossetto, P. Schellart, O. Scholten, S. ter Veen, S. Thoudam, T. N. [...]

Published
2016
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5. A large light-mass component of cosmic rays at 1017–1017.5 electronvolts from radio observations.

Author

Buitink, S., Corstanje, A., Falcke, H., Hörandel, J. R., Huege, T., Nelles, A., Rachen, J. P., Rossetto, L., Schellart, P., Scholten, O., ter Veen, S., Thoudam, S., Trinh, T. N. G., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., and Best, P.

Abstract

High-resolution radio measurements of air showers—cascades of secondary particles in the atmosphere initiated by cosmic rays—reveal that cosmic rays with energies of 1017–1017.5 electronvolts have a mixed composition, with light elements (protons and helium nuclei) making up 80 per cent of their mass.Mass composition of cosmic rays: Stijn Buitink et al. report on the mass composition of cosmic rays in the energy range 1017 to 1017.5 electron volts, derived from LOFAR radio telescope measurements of cosmic ray initiated cascades of secondary particles (air showers) in the atmosphere. They find a mixed composition, containing a light-mass fraction of approximately 80%. Unless the extragalactic cosmic ray component becomes significant below 1017.5 electron volts, these findings indicate an additional Galactic component dominating in this energy range.Cosmic rays are the highest-energy particles found in nature. Measurements of the mass composition of cosmic rays with energies of 1017–1018 electronvolts are essential to understanding whether they have galactic or extragalactic sources. It has also been proposed that the astrophysical neutrino signal1 comes from accelerators capable of producing cosmic rays of these energies2. Cosmic rays initiate air showers—cascades of secondary particles in the atmosphere—and their masses can be inferred from measurements of the atmospheric depth of the shower maximum3 (Xmax; the depth of the air shower when it contains the most particles) or of the composition of shower particles reaching the ground4. Current measurements5 have either high uncertainty, or a low duty cycle and a high energy threshold. Radio detection of cosmic rays6,7,8 is a rapidly developing technique9 for determining Xmax (refs 10, 11) with a duty cycle of, in principle, nearly 100 per cent. The radiation is generated by the separation of relativistic electrons and positrons in the geomagnetic field and a negative charge excess in the shower front6,12. Here we report radio measurements of Xmax with a mean uncertainty of 16 grams per square centimetre for air showers initiated by cosmic rays with energies of 1017–1017.5 electronvolts. This high resolution in Xmax enables us to determine the mass spectrum of the cosmic rays: we find a mixed composition, with a light-mass fraction (protons and helium nuclei) of about 80 per cent. Unless, contrary to current expectations, the extragalactic component of cosmic rays contributes substantially to the total flux below 1017.5 electronvolts, our measurements indicate the existence of an additional galactic component, to account for the light composition that we measured in the 1017–1017.5 electronvolt range. [ABSTRACT FROM AUTHOR]

Published
2016
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6. A large light-mass component of cosmic rays at 1017–1017.5electronvolts from radio observations

Author

Buitink, S., Corstanje, A., Falcke, H., Hörandel, J. R., Huege, T., Nelles, A., Rachen, J. P., Rossetto, L., Schellart, P., Scholten, O., ter Veen, S., Thoudam, S., Trinh, T. N. G., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J. W., Brouw, W. N., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., Conway, J. E., de Gasperin, F., de Geus, E., Deller, A., Dettmar, R.-J., van Diepen, G., Duscha, S., Eislöffel, J., Engels, D., Enriquez, J. E., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Grießmeier, J. M., Gunst, A. W., van Haarlem, M. P., Hassall, T. E., Heald, G., Hessels, J. W. T., Hoeft, M., Horneffer, A., Iacobelli, M., Intema, H., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., van Leeuwen, J., Loose, G. M., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mevius, M., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H. J. A., Scaife, A. M. M., Schwarz, D. J., Serylak, M., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Toribio, M. C., Vermeulen, R., Vocks, C., Vogt, C., van Weeren, R. J., Wijers, R. A. M. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., and Zensus, J. A.

Abstract

High-resolution radio measurements of air showers—cascades of secondary particles in the atmosphere initiated by cosmic rays—reveal that cosmic rays with energies of 1017–1017.5electronvolts have a mixed composition, with light elements (protons and helium nuclei) making up 80 per cent of their mass.

Published
2016
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7. Correction: Corrigendum: A large light-mass component of cosmic rays at 1017–1017.5electronvolts from radio observations

Author

Buitink, S., Corstanje, A., Falcke, H., Hörandel, J. R., Huege, T., Nelles, A., Rachen, J. P., Rossetto, L., Schellart, P., Scholten, O., ter Veen, S., Thoudam, S., Trinh, T. N. G., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J. W., Brouw, W. N., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., Conway, J. E., de Gasperin, F., de Geus, E., Deller, A., Dettmar, R.-J., van Diepen, G., Duscha, S., Eislöffel, J., Engels, D., Enriquez, J. E., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Grießmeier, J. M., Gunst, A. W., van Haarlem, M. P., Hassall, T. E., Heald, G., Hessels, J. W. T., Hoeft, M., Horneffer, A., Iacobelli, M., Intema, H., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., van Leeuwen, J., Loose, G. M., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mevius, M., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H. J. A., Scaife, A. M. M., Schwarz, D. J., Serylak, M., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Toribio, M. C., Vermeulen, R., Vocks, C., Vogt, C., van Weeren, R. J., Wijers, R. A. M. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., and Zensus, J. A.

Abstract

Nature 531, 70–73 (2016); doi:10.1038/nature16976 In this Letter, we omitted to cite preliminary results from the low-energy extension of the Pierre Auger Observatory, as presented at the International Cosmic Ray Conference 2015 (ref. 1). Figure 1 of this Corrigendum shows measurements of the average value of Xmax for the Low Frequency Array (LOFAR), and earlier experiments using different techniques, now including the data from the Pierre Auger Observatory1, specifically the contribution of A.

Published
2016
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