Results 11 to 20 of about 8,853 (213)

Why (Still) Studying Turbulence in Fluids and Plasmas?

Perspectives of Earth and Space Scientists, Volume 4, Issue 1, December 2023., 2023
Abstract Turbulence, a captivating and intricate phenomenon, continues to attract researchers across diverse scientific disciplines. Despite considerable efforts, turbulence remains a fascinating challenge and stands as one of the unsolved enigmas in classical physics.
Tommaso Alberti, Roberto Benzi, Vincenzo Carbone   +2 more
wiley   +1 more source

Long‐Term Density Trend in the Mesosphere and Lower Thermosphere From Occultations of the Crab Nebula With X‐Ray Astronomy Satellites

Journal of Geophysical Research: Space Physics, Volume 128, Issue 2, February 2023., 2023
Abstract We present long‐term density trends of the Earth's upper atmosphere at altitudes between 71 and 116 km, based on atmospheric occultations of the Crab Nebula observed with X‐ray astronomy satellites, ASCA, RXTE, Suzaku, NuSTAR, and Hitomi. The combination of the five satellites provides a time period of 28 years from 1994 to 2022.
Satoru Katsuda, Teruaki Enoto, Andrea N. Lommen, Koji Mori, Yuko Motizuki, Motoki Nakajima, Nathaniel C. Ruhl, Kosuke Sato, Gunter Stober, Makoto S. Tashiro, Yukikatsu Terada, Kent S. Wood   +11 more
wiley   +1 more source

A search for runaway stars in 12 Galactic supernova remnants

Astronomische Nachrichten, Volume 342, Issue 3, Page 553-577, March 2021., 2021
Runaway stars can result from core‐collapse supernovae in multiple stellar systems. If the supernova disrupts the system, the companion is ejected with its former orbital velocity. A clear identification of a runaway star can yield the time and place of the explosion, as well as orbital parameters of the pre‐supernova binary system.
Oliver Lux, Ralph Neuhäuser, Markus Mugrauer, Richard Bischoff   +3 more
wiley   +1 more source

Fermi-LAT Search for Pulsar Wind Nebulae around gamma-ray Pulsars [PDF]

, 2010
The high sensitivity of the Fermi-LAT (Large Area Telescope) offers the first opportunity to study faint and extended GeV sources such as pulsar wind nebulae (PWNe). After one year of observation the LAT detected and identified three pulsar wind nebulae:
A. A. Moiseev, A. Bouvier, A. Brez, A. Chekhtman, A. de Angelis, A. de Luca, A. G. Lyne, A. K. Harding, A. Makeev, A. Morselli, A. Noutsos, A. Okumura, A. P. Waite, A. Reimer, A. S. Johnson, A. Sander, A. Tramacere, A. Van Etten, A. W. Borgland, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Acciari, Albert, Aliu, Anderhub, Atwood, B. Berenji, B. L. Winer, Bai, Bednarek, Blondin, C. C. Cheung, C. Cecchi, C. D. Dermer, C. Favuzzi, C. Monte, C. Sgrò, Camilo, Camilo, Cheng, Chevalier, Cordes, D'Amico, D. A. Smith, D. Bastieri, D. Dumora, D. F. Torres, D. Hadasch, D. J. Suson, D. J. Thompson, D. Paneque, D. Parent, Dame, de Jager, de Jager, Djannati-Atai, Dyks, E. Bonamente, E. Charles, E. D. Bloom, E. do Couto e Silva, E. Hays, E. J. Siskind, E. Nuss, F. Camilo, F. de Palma, F. Gargano, F. Giordano, F. Longo, F. Loparco, F. Piron, Fujita, Fukui, G. A. Caliandro, G. Barbiellini, G. Godfrey, G. Hobbs, G. Jóhannesson, G. Spandre, G. Theureau, G. Tosti, Gelfand, Green, H. F.-W. Sadrozinski, H. Katagiri, H. Takahashi, Halpern, Halpern, Hartman, I. A. Grenier, I. Cognard, I. V. Moskalenko, J. B. Thayer, J. Ballet, J. Bregeon, J. Chiang, J. Cohen-Tanugi, J. Conrad, J. E. Grove, J. E. McEnery, J. F. Ormes, J. G. Thayer, J. H. Panetta, J. Kataoka, J. Knödlseder, J. Lande, J. M. Casandjian, J. Mehault, J. Ripken, J. Vandenbroucke, K. Bechtol, K. Hayashi, K. S. Wood, Kaaret, Kniffen, Kothes, L. Baldini, L. Guillemot, L. Latronico, L. Tibaldo, M. Ackermann, M. Ajello, M. Brigida, M. E. Monzani, M. Frailis, M. Giroletti, M. Keith, M. Kerr, M. Kramer, M. Kuss, M. Lemoine-Goumard, M. Marelli, M. N. Lovellette, M. N. Mazziotta, M. Naumann-Godo, M. Pepe, M. Pesce-Rollins, M. Razzano, M. S. Strickman, M. Ziegler, M.-H. Grondin, Manchester, Morsi, Muslimov, N. Giglietto, N. Rea, N. Vilchez, Ng, O. Reimer, P. A. Caraveo, P. Bruel, P. D. Smith, P. F. Michelson, P. Fusco, P. Giommi, P. L. Nolan, P. Lubrano, P. M. Saz Parkinson, P. S. Drell, P. S. Ray, P. Spinelli, P. Wang, P. Weltevrede, Pavlov, Porter, Press, R. A. Cameron, R. Bellazzini, R. Buehler, R. Claus, R. Dubois, R. E. Hughes, R. Rando, R. W. Romani, Ray, Roberts, Romani, Romero, S. Buson, S. Ciprini, S. E. Thorsett, S. Funk, S. Germani, S. Guiriec, S. Johnston, S. M. Ransom, S. Murgia, S. Rainò, S. Ritz, S. W. Digel, S.-H. Lee, Safi-Harb, Saz Parkinson, Slane, Slane, Slane, T. A. Porter, T. Glanzman, T. Kamae, T. L. Usher, T. Mizuno, T. Nakamori, T. Ohsugi, T. Reposeur, T. Takahashi, T. Tanaka, T. Uehara, T. Ylinen, Theureau, Tian, V. Pelassa, V. Vasileiou, V. Vitale, Van Etten, Venter, W. B. Focke, W. N. Johnson, Ward, Weiler, Whiteoak, Y. Fukazawa, Y. Hanabata, Y. Uchiyama, Yadigaroglu, Z. Yang, Ö. Çelik   +239 more
core   +11 more sources

A Spatially Resolved X-Ray Polarization Map of the Vela Pulsar Wind Nebula

The Astrophysical Journal Letters, 2023
In this paper, we present a full spatially resolved polarization map for the Vela pulsar wind nebula (PWN) observed by IXPE. By employing effective background discrimination techniques, our results show a remarkably high degree of local polarization in ...
Kuan Liu, Fei Xie, Yi-han Liu, Chi-Yung Ng, Niccolò Bucciantini, Roger W. Romani, Martin C. Weisskopf, Enrico Costa, Alessandro Di Marco, Fabio La Monaca, Fabio Muleri, Paolo Soffitta, Wei Deng, Yu Meng, En-wei Liang   +14 more
doaj   +1 more source

Cannonball or Bowling Ball: Proper Motion and Parallax for PSR J0002+6216

The Astrophysical Journal, 2023
We report the results of careful astrometric measurements of the cannonball pulsar J0002+6216 carried out over 3 yr using the High Sensitivity Array. We significantly refine the proper motion to μ = 35.3 ± 0.6 mas yr ^−1 and place new constraints on the ...
S. Bruzewski, F. K. Schinzel, G. B. Taylor, P. Demorest, D. A. Frail, M. Kerr, P. Kumar   +6 more
doaj   +1 more source

Discovery of GeV Gamma-Ray Emission from Pulsar Wind Nebula Kes 75 and PSR J1846–0258

The Astrophysical Journal, 2023
We report the detection of gamma-ray emission from pulsar wind nebula (PWN) Kes 75 and PSR J1846−0258. Through modeling the spectral energy distribution incorporating the new Fermi-LAT data, we find that the observed gamma-ray emission is likely a ...
Samayra M. Straal, Joseph D. Gelfand, Jordan L. Eagle   +2 more
doaj   +1 more source

Pulsar wind nebulae in supernova remnants [PDF]

, 2000
A spherically symmetric model is presented for the interaction of a pulsar wind with the associated supernova remnant. This results in a pulsar wind nebula whose evolution is coupled to the evolution of the surrounding supernova remnant.
Achterberg, A., Gallant, Y. A., Tóth, G., van der Swaluw, E.   +3 more
core   +2 more sources

Supernova remnants in nearby galaxies

Astronomische Nachrichten, Volume 341, Issue 2, Page 156-162, February 2020., 2020
Abstract Supernova remnants (SNRs) are the aftermath of stellar explosions, which inject large amounts of energy into the interstellar medium (ISM), carving out new structures and transferring kinetic energy to the ISM. They also act as recycling centers, which return elements processed in stars to the ISM, and cosmic particle accelerators.
Manami Sasaki
wiley   +1 more source

Turbulent Diffusion of the Particles within Pulsar Wind Nebulae

The Astrophysical Journal, 2023
A turbulent diffusion model is presented to account for the energy and spatial diffusion of the particles within pulsar wind nebulae (PWNe), with the assumption that the energy injected from the pulsar into the nebula is split between the turbulence ...
Fang-Wu Lu, Bo-Tao Zhu, Wen Hu, Li Zhang
doaj   +1 more source