Results 71 to 80 of about 460 (205)

TeV Dark Matter Searches in the Extragalactic Gamma-ray Sky

Galaxies, 2022
High-energetic gamma rays from astrophysical targets constitute a unique probe for annihilation or decay of heavy particle dark matter (DM). After several decades, diverse null detections have resulted in strong constraints for DM particle masses up to ...
Moritz Hütten, Daniel Kerszberg
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

Investigation of the Mechanical, Electronic, and Optical Properties in PtLuSb (Platinum–Lutetium Antimonide) Topological Insulator

Advances in Condensed Matter Physics, Volume 2025, Issue 1, 2025.
Topological insulators (TIs) are becoming a great, fascinating compound due to their multidimensional applications in quantum computing, spintronics, and advanced technology. Recently, some half‐Heusler compounds exhibit topologically insulating behaviors and are predicted to be TIs.
Md. Ali Munna, Md. Shah Alam, Yulong Bai
wiley   +1 more source

Fundamental physics in space with the Fermi Gamma-ray Space Telescope

Journal of Physics: Conference Series, 2011
Successfully launched in June 2008, the Fermi Gamma-ray Space Telescope, formerly named GLAST, has been observing the high-energy gamma-ray sky with unprecedented sensitivity for more than two years, opening a new window on a wide variety of exotic astrophysical objects.
openaire   +3 more sources

On the Spectral Shape of Non-recycled γ-ray Pulsars [PDF]

Journal of Astronomy and Space Sciences, 2016
More than 100 γ−ray pulsars have been discovered by the Fermi Gamma-ray Space Telescope. With a significantly enlarged sample size, it is possible to compare the properties of different classes. Radio-quiet (RQ) γ−ray pulsars form a distinct population,
Chung-Yue Hui, Jongsu Lee
doaj   +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 Statistical Analysis of GeV Spectral Breaks in Bright Gamma-Ray Flat-spectrum Radio Quasars

The Astrophysical Journal Supplement Series
We present the statistical results of GeV spectral breaks of bright gamma-ray flat-spectrum radio quasars (FSRQs) in the energy range of 0.1–10 GeV based on New Pass 8 data of the Large Area Telescope on board Fermi Gamma-Ray Space Telescope.
K. R. Zhu, J. M. Chen, L. Zhang
doaj   +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

SU(2)X vector DM and Galactic Center gamma-ray excess

Physics Letters B, 2015
An unbroken Z3 symmetry remains when a local SU(2)X symmetry is broken spontaneously by a quadruplet. The gauge boson χμ(χ¯μ) carries the dark charge and is the candidate of dark matter (DM).
Chuan-Hung Chen, Takaaki Nomura
doaj   +1 more source

Subphotospheric dissipation in gamma-ray bursts observed by the Fermi Gamma-ray Space Telescope

, 2016
Gamma-ray bursts (GRBs) are the brightest events in the Universe, for a short time outshining the rest of the Universe combined, as they explode with isotropic equivalent luminosities up to $10^{54}$ erg s$^{-1}$. These events are believed to be connected to supernovae and to binary compact object mergers, such as binary neutron stars or neutron star --
Björn Ahlgren
openalex   +2 more sources