Results 1 to 10 of about 479,061 (218)

Discovery of gamma-ray emission from the supernova remnant Kes 17 with Fermi Large Area Telescope [PDF]

, 2011
We report the discovery of GeV emission at the position of supernova remnant Kes 17 by using the data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope.
Cheng, K. S., Huang, R. H. H., Hui, C. Y., Kong, A. K. H., Tam, P. H. T., Wu, E. M. H., Wu, J. H. K.   +6 more
core   +2 more sources

Review on Uniaxial Negative Thermal Expansion of Tr‐Zr Superconductors

MetalMat, EarlyView.
In this paper, we review recent research progress of a study of uniaxial negative thermal expansion (NTE) along the c‐axis with transition (Tr) metal zirconide TrZr2 and TrZr3 superconductors. We introduce the unique thermal expansion properties of TrZr2 and TrZr3 and the flexibility of controlling thermal expansion properties.
Yuto Watanabe, Yoshikazu Mizuguchi
wiley   +1 more source

Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies

Galaxies, 2019
Before the launch of the Fermi Gamma-ray Space Telescope satellite only two classes of active galactic nuclei (AGN) were known to generate relativistic jets and thus to emit up to the γ -ray energy range: blazars and radio galaxies, both hosted
Filippo D’Ammando
doaj   +1 more source

Likely Detection of γ-Ray Pulsations of PSR J1717+4308A in NGC 6341 and Implication of the γ-Ray Millisecond Pulsars in Globular Clusters

The Astrophysical Journal, 2023
We report our analysis results for the globular cluster (GC) NGC 6341 (M92), as a millisecond pulsar (MSP) J1717+4308A has recently been reported found in this GC.
Pengfei Zhang, Yi Xing, Zhongxiang Wang, Wei Wu, Zhangyi Chen   +4 more
doaj   +1 more source

Initial Thermal States of Super‐Earth Exoplanets and Implications for Early Dynamos

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract The accretion of Earth and the formation of a metallic core released a large amount of primordial heat and may have enabled its evolution into a habitable world. Metal‐silicate segregation likely occurs in super‐Earth exoplanets as well, but its influence on their initial thermal states has not been fully examined.
Nathaniel I. White, Jie Li
wiley   +1 more source

First Time‐Resolved Leader Spectra Associated With a Downward Terrestrial Gamma‐Ray Flash Detected at the Telescope Array Surface Detector

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 24, 28 December 2024.
Abstract Optical emissions associated with Terrestrial Gamma ray Flashes (TGFs) have recently become important subjects in space‐based and ground‐based observations as they can help us understand how TGFs are produced during thunderstorms. In this paper, we present the first time‐resolved leader spectra of the optical component associated with a ...
N. Kieu, R. U. Abbasi, M. M. F. Saba, J. W. Belz, P. R. Krehbiel, M. A. Stanley, F. J. Gordillo‐Vazquez, M. Passas‐Varo, T. Warner, W. Rison, D. Rodeheffer, D. R. da Silva, D. Mazzucco, T. Knight, I. T. Cruz, J. Remington, J. Mazich, R. LeVon, K. Smout, A. Petrizze, T. Abu‐Zayyad, M. Allen, D. R. Bergman, I. Buckland, W. Campbell, B. G. Cheon, K. Endo, A. Fedynitch, T. Fujii, K. Fujisue, K. Fujita, M. Fukushima, G. Furlich, Z. Gerber, N. Globus, W. Hanlon, N. Hayashida, H. He, K. Hibino, R. Higuchi, D. Ikeda, T. Ishii, D. Ivanov, S. Jeong, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, Y. Kawachi, K. Kawata, I. Kharuk, E. Kido, H. B. Kim, JiHee Kim, JiHyun Kim, S. W. Kim, R. Kobo, I. Komae, K. Komatsu, K. Komori, C. Koyama, M. Kudenko, M. Kuroiwa, Y. Kusumori, M. Kuznetsov, Y. J. Kwon, K. H. Lee, M. J. Lee, B. Lubsandorzhiev, J. P. Lundquist, A. Matsuzawa, J. A. Mathews, J. N. Matthews, K. Mizuno, M. Mori, M. Murakami, S. Nagataki, M. Nakahara, T. Nakamura, T. Nakayama, Y. Nakayama, T. Nonaka, S. Ogio, H. Ohoka, N. Okazaki, M. Onishi, A. Oshima, H. Oshima, S. Ozawa, I. H. Park, K. Y. Park, M. Potts, M. Przybylak, M. S. Pshirkov, C. Rott, G. I. Rubtsov, D. Ryu, H. Sagawa, N. Sakaki, R. Sakamoto, T. Sako, N. Sakurai, S. Sakurai, D. Sato, S. Sato, K. Sekino, T. Shibata, J. Shikita, H. Shimodaira, B. K. Shin, H. S. Shin, K. Shinozaki, J. D. Smith, P. Sokolsky, B. T. Stokes, T. A. Stroman, Y. Takagi, K. Takahashi, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, K. Tanaka, M. Tanaka, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, T. Tomida, S. Troitsky, Y. Tsunesada, S. Udo, F. Urban, I. A. Vaiman, M. Vrábel, D. Warren, K. Yamazaki, Y. Zhezher, Z. Zundel, J. Zvirzdin   +141 more
wiley   +1 more source

The Fermi GBM and LAT follow-up of GW150914

EPJ Web of Conferences, 2017
As the first detection of Gravitation Wave (GW) event arising from the coalescence of two stellar-mass Black Holes (BH) was announced by LIGO, a new era for astronomy began.
Bissaldi E., Connaughton V., Omodei N., Burns E., Goldstein A., Vianello G.   +5 more
doaj   +1 more source

Fermi/LAT discovery of gamma-ray emission from the flat-spectrum radio quasar PKS 1454-354 [PDF]

Astrophys.J.697:934-941,2009, 2009
We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope of high-energy gamma-ray (GeV) emission from the flat-spectrum radio quasar PKS 1454-354 (z=1.424). On 4 September 2008 the source rose to a peak flux of (3.5 +/- 0.7)x 10^-6 ph cm^-2 s^-1 (E > 100 MeV) on a time scale of hours and then slowly dropped ...
arxiv   +1 more source

Solving the Puzzle of the Carbonic Acid Vibrational Spectrum – an Anharmonic Story

ChemPhysChem, Volume 25, Issue 22, November 18, 2024.
The harmonic picture is the basic approximation that allows the prediction of vibrational spectra. However, reality is neither decoupled nor harmonic. This can lead to problems in notation and the assignment of individual bands. Taking anharmonicity and mode coupling into account allows a drastic improvement in spectral clarity.
Jonas Schlagin, Dennis F. Dinu, Jürgen Bernard, Thomas Loerting, Hinrich Grothe, Klaus R. Liedl   +5 more
wiley   +1 more source

Unraveling the Physics of Quasar Jets: Optical Polarimetry and Implications for the X-ray Emission Process

Galaxies, 2020
Since the launch of Chandra twenty years ago, one of the greatest mysteries surrounding Quasar Jets is the production mechanism for their extremely high X-ray luminosity. Two mechanisms have been proposed. In the first view, the X-ray emission is inverse-
Eric S. Perlman, Devon Clautice, Sayali Avachat, Mihai Cara, William B. Sparks, Markos Georganopoulos, Eileen Meyer   +6 more
doaj   +1 more source