Results 51 to 60 of about 54,710 (141)

Gigahertz-peaked spectra pulsars in Pulsar Wind Nebulae [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
We have carried out a detailed study of the spectral nature of six pulsars surrounded by Pulsar wind nebulae (PWN). The pulsar flux density were estimated using the interferometric imaging technique of the Giant Metrewave Radio Telescope at three frequencies 325 MHz, 610 MHz and 1280 MHz. The spectra showed a turnover around gigahertz frequency in four
Karolina Rożko, Rahul Basu, Rahul Basu, Jarosław Kijak, Wojciech Lewandowski   +4 more
openaire   +3 more sources

The Complex Wind Torus and Jets of PSR B1706-44

, 2005
We report on Chandra ACIS imaging of the pulsar wind nebula (PWN) of the young Vela-like PSR B1706-44, which shows the now common pattern of an equatorial wind and polar jets.
C.‐Y. Ng, Chadwick P. M., Frater R. H., Gotthelf E. V., Johnston S., Maeder A., Nicastro L., Richard Dodson, Roger W. Romani, Walter Brisken, Zavlin V. E.   +10 more
core   +2 more sources

Particle acceleration in Pulsars and Pulsar Wind Nebulae

, 2022
These notes summarise the contents of the lectures I delivered at the International School of Physics "Enrico Fermi" on "Foundations of Cosmic Ray Astrophysics". The lectures were dealing with the physics of Pulsars and Pulsar Wind Nebulae (PWNe) in the Cosmic Ray (CR) perspective.
openaire   +3 more sources

X-RAY EVOLUTION OF PULSAR WIND NEBULAE [PDF]

The Astrophysical Journal, 2010
During the search for counterparts of very-high-energy gamma-ray sources, we serendipitously discovered large, extended, low surface brightness emission from PWNe around pulsars with the ages up to ~100 kyrs, a discovery made possible by the low and stable background of the Suzaku X-ray satellite.
Bamba, A., Anada, T., Dotani, T., Mori, K., Yamazaki, R., Ebisawa, K., Vink, J.   +6 more
openaire   +4 more sources

A candidate optical counterpart to the middle-aged gamma-ray pulsar PSR J1741-2054 [PDF]

, 2016
We carried out deep optical observations of the middle-aged $\gamma$-ray pulsar PSR J1741-2054 with the Very Large Telescope (VLT). We identified two objects, of magnitudes $m_v=23.10\pm0.05$ and $m_v=25.32\pm0.08$, at positions consistent with the very ...
Belfiore, A., De Luca, A., Marelli, M., Mignani, R. P., Moran, P., Pierbattista, M., Razzano, M., Salvetti, D., Shearer, A., Testa, V.   +9 more
core   +2 more sources

A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7

, 2005
We report on a possible association of the recently discovered very high-energy $\gamma$-ray source HESS J1825--137 with the pulsar wind nebula (commonly referred to as G 18.0--0.7) of the $2.1\times 10^{4}$ year old Vela-like pulsar PSR B1823--13.
A. Djannati-Ataï, A. G. Akhperjanian, A. Jacholkowska, A. Konopelko, A. Lemière, A. M. Brown, A. Marcowith, A. Noutsos, A. R. Bazer-Bachi, A. Reimer, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, B. C. Raubenheimer, B. Degrange, B. Giebels, B. Khélifi, Bernlöhr, Blondin, Bucciantini, C. Boisson, C. G. Théoret, C. Hadjichristidis, C. Masterson, C. Schuster, C. Stegmann, C. Venter, Clifton, D. Berge, D. Emmanoulopoulos, D. Horns, D. Spangler, F. A. Aharonian, F. Breitling, F. Feinstein, Funk, G. Dubus, G. Fontaine, G. Heinzelmann, G. Henri, G. Hermann, G. Pelletier, G. Pühlhofer, G. Rowell, G. Vasileiadis, Gaensler, H. J. Dickinson, H. J. Völk, H. Sol, Hartman, Hinton, I. Braun, I. J. Latham, J. A. Hinton, J. F. Glicenstein, J. L. Osborne, J. M. Martin, J. Raux, J. Ripken, J.-P. Tavernet, K. Bernlöhr, K. J. Orford, L. Costamante, L. O'C. Drury, , L. Rob, L. Rolland, L. Saugé, L.-M. Chounet, M. Beilicke, M. de Naurois, M. Hauser, M. Holleran, M. Lemoine-Goumard, M. Ouchrif, M. Panter, M. Punch, M. Raue, M. Siewert, M. Tluczykont, N. Leroy, Nel, Nolan, Nu. Komin, O. Bolz, O. C. de Jager, O. Martineau-Huynh, O. Reimer, P. Espigat, P. Goret, P. M. Chadwick, P. Vincent, R. Cornils, R. Le Gallou, R. Schlickeiser, R. Steenkamp, R. Terrier, S. Funk, S. Gillessen, S. J. Nolan, S. J. Wagner, S. M. Rayner, S. Pita, S. Schlenker, T. J. L. McComb, T. Lohse, U. Schwanke, V. Borrel, V. Sahakian, van der Swaluw, W. Benbow, W. Hofmann, Y. A. Gallant, Y. Fuchs   +114 more
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A MODEL OF THE SPECTRAL EVOLUTION OF PULSAR WIND NEBULAE [PDF]

The Astrophysical Journal, 2010
Recent observations suggest that many old pulsar wind nebulae (PWNe) are bright TeV gamma-ray sources without a strong X-ray counterpart. In this paper, we study the spectral evolution of PWNe taking into account the energy which was injected when they were young for old PWNe.
Shuta J. Tanaka, Fumio Takahara
openaire   +5 more sources

G359.95-0.04: Pulsar Candidate Near Sgr A* [PDF]

, 2005
We report the discovery of a prominent nonthermal X-ray feature located near the Galactic center that we identify as an energetic pulsar wind nebula. This feature, G359.95-0.04, lies 1 lyr north of Sgr A* (in projection), is comet-like in shape, and has ...
Gotthelf, E. V., Lu, F. J., Wang, Q. D.
core   +3 more sources

Discovery of two candidate pulsar wind nebulae in very-high-energy gamma rays [PDF]

A&A 472, 489-495 (2007), 2007
We present the discovery of two very-high-energy gamma-ray sources in an ongoing systematic search for emission above 100 GeV from pulsar wind nebulae in survey data from the H.E.S.S. telescope array. Imaging Atmospheric Cherenkov Telescopes are ideal tools for searching for extended emission from pulsar wind nebulae in the very-high-energy regime. H.E.
arxiv   +1 more source

HESS Observations of Pulsar Wind Nebulae [PDF]

AIP Conference Proceedings, 2005
6 pages, 3 figures, appeared in the proceedings of "Astrophysical Sources of High Energy Particles and Radiation", held in Torun, Poland, eds. T. Bulik, B.
openaire   +3 more sources