Results 71 to 80 of about 74,904 (235)

3.9 day orbital modulation in the TeV gamma-ray flux and spectrum from the X-ray binary LS 5039

, 2006
New observations of LS 5039, a High Mass X-ray Binary comprising a massive star and compact object, were carried out with the High Energy Stereoscopic System of Cherenkov Telescopes (H.E.S.S.) in 2005 at very high energy (VHE) gamma-ray energies.
A. Djannati-Ataï, A. Fiasson, A. G. Akhperjanian, A. Hoffmann, A. Jacholkowska, A. Konopelko, A. Lemière, A. M. Brown, A. Marcowith, A. Noutsos, A. R. Bazer-Bachi, A. Reimer, A. Santangelo, A. Shalchi, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, Albert, Angelini, B. C. Raubenheimer, B. Degrange, B. Giebels, B. Khélifi, Bednarek, Bosch-Ramon, Böttcher, C. Boisson, C. Hadjichristidis, C. Masterson, C. Stegmann, C. van Eldik, C. Venter, Casares, Corbel, D. Berge, D. Emmanoulopoulos, D. Hauser, D. Horns, D. Nedbal, D. Spangler, de Jager, Distefano, Dubus, Dubus, E. Ferrero, E. Kendziorra, E. Moulin, F. Aharonian, F. Feinstein, F. Spanier, G. Dubus, G. Fontaine, G. Heinzelmann, G. Henri, G. Hermann, G. Maurin, G. Pelletier, G. Pühlhofer, G. Rowell, G. Superina, G. Vasileiadis, H. J. Dickinson, H. J. Völk, H. Sol, Harmon, Hartman, Heinz, I. Braun, I. Büsching, I. J. Latham, J. A. Hinton, J. F. Glicenstein, J. L. Osborne, J. M. Martin, J. Ripken, J.-P. Tavernet, K. Bernlöhr, K. Egberts, K. J. Orford, K. Kosack, Khangulyan, L. Costamante, L. O'C. Drury, L. Rob, L. Rolland, L. Saugé, L.-M. Chounet, M. Beilicke, M. de Naurois, M. Füßling, M. Hauser, M. Holleran, M. Lemoine-Goumard, M. Ouchrif, M. Panter, M. Punch, M. Raue, M. Tluczykont, M. Ward, Maraschi, Margon, Martí, Mirabel, Moderski, Moskalenko, Nu. Komin, O. Bolz, O. C. de Jager, O. Martineau-Huynh, O. Reimer, P. Espigat, P. Goret, P. M. Chadwick, P. Vincent, Paredes, Paredes, Paredes, Protheroe, R. Bühler, R. Cornils, R. Le Gallou, R. Schlickeiser, R. Schröder, R. Steenkamp, R. Terrier, Ribó, Ribó, Romero, S. Carrigan, S. Funk, S. J. Nolan, S. J. Wagner, S. M. Rayner, S. Pita, S. Schlenker, S. Schwarzburg, Scargle, Seb. Funk, T. J. L. McComb, T. Lohse, Tavani, U. Schwanke, V. Borrel, V. Sahakian, W. Benbow, W. Hofmann, Wen, Y. A. Gallant   +150 more
core   +2 more sources

Ultrafast Transitions in X‐Ray Irradiated Solids

Contributions to Plasma Physics, EarlyView.
ABSTRACT In this review, we present current developments on modeling ultrafast transitions in solids triggered by intense, atto‐ to femtosecond pulses from X‐ray free electron lasers. This specific irradiation regime requires dedicated simulation tools based on theoretical and computational methods, involving the elements of classical and quantum ...
Sebastião Antunes, Konrad J. Kapcia, Vladimir Lipp, Beata Ziaja   +3 more
wiley   +1 more source

Very High-energy Gamma-Ray Episodic Activity of Radio Galaxy NGC 1275 in 2022–2023 Measured with MACE

The Astrophysical Journal Letters
The radio galaxy NGC 1275, located at the central region of Perseus cluster, is a well-known very high-energy (VHE) gamma-ray emitter. The Major Atmospheric Cherenkov Experiment Telescope has detected two distinct episodes of VHE ( E > 80 GeV) gamma-ray ...
S. Godambe, N. Mankuzhiyil, C. Borwankar, B. Ghosal, A. Tolamatti, M. Pal, P. Chandra, M. Khurana, P. Pandey, Z. A. Dar, S. Godiyal, J. Hariharan, Keshav Anand, S. Norlha, D. Sarkar, R. Thubstan, K. Venugopal, A. Pathania, S. Kotwal, Raj Kumar, N. Bhatt, K. Chanchalani, M. Das, K. K. Singh, K. K. Gour, M. Kothari, Nandan Kumar, Naveen Kumar, P. Marandi, C. P. Kushwaha, M. K. Koul, P. Dorjey, N. Dorji, V. R. Chitnis, R. C. Rannot, S. Bhattacharyya, N. Chouhan, V. K. Dhar, M. Sharma, K. K. Yadav   +39 more
doaj   +1 more source

Massive protostars as gamma-ray sources [PDF]

, 2009
Massive protostars have associated bipolar outflows with velocities of hundreds of km s$^{-1}$. Such outflows can produce strong shocks when interact with the ambient medium leading to regions of non-thermal radio emission.
A. T. Araudo, Araudo, Araudo, Banerjee, Banerjee, Bell, Blondin, Blumenthal, Bonnell, Bordas, Crusius-Watzel, Crutcher, Dogiel, Drury, Drury, Fermi, G. E. Romero, Garay, Garay, Garay, Henriksen, J. M. Paredes, Kaiser, Kelner, Lucek, Martí, Martí, McKee, Morrison, Myasnikov, Plambeck, Pravdo, Reville, Rodríguez, Rodríguez, Romero, Seaton, Shu, V. Bosch-Ramon   +38 more
core   +3 more sources

Telescope Concepts in Gamma-Ray Astronomy

, 2022
This chapter outlines the general principles for the detection and characterisation of high-energy $γ$-ray photons in the energy range from MeV to GeV. Applications of these fundamental photon-matter interaction processes to the construction of instruments for $γ$-ray astronomy are described, including a short review of past and present realisations of
Siegert, T., Horan, D., Kanbach, G.
openaire   +3 more sources

Polycarbazole–NiOOH Interfacial Engineering of BiVO4 Photoanodes for Efficient and Stable Solar Water Splitting

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A π‐conjugated carbazole (p‐CBZ) layer is electro‐polymerized on BiVO4 to form a p–n heterojunction that enhances charge separation and suppresses surface recombination, while a NiOOH co‐catalyst accelerates oxygen evolution kinetics. The synergistic BVO/p‐CBZ/NiOOH photoanode delivers a high photocurrent density and long‐term stability for efficient ...
Lakshman Sundar Arumugam, Ana Gutierrez‐Blanco, Agustin O. Alvarez, Alejandro Saura Aviles, Mahesh Eledath‐Changarath, Rafael Abargues, Juan Francisco Sánchez‐Royo, Helena Rabelo, Maria Chiara Spadaro, Jordi Arbiol, Javier E. Durantini, Sixto Giménez   +11 more
wiley   +1 more source

Advanced Compton Telescope Designs and SN Science [PDF]

, 2001
The Advanced Compton Telescope (ACT) has been suggested to be the optimal next-generation instrument to study nuclear gamma-ray lines. In this work, we investigate the potential of three hypothetical designs of the ACT to perform SN science.
Burrows, Cappellaro, Chan, Clayton, Diehl, Guessoum, Hamuy, Harris, Höflich, Höflich, Iwamoto, J.D Kurfess, Kinzer, Knodlseder, L.-S The, Milne, Nomoto, P.A Milne, Pinto, Prantzos, R.A Kroeger, The, Yamaoka   +22 more
core   +3 more sources

Designing chiral organic small molecules for circularly polarized light detection via group theory

InfoMat, EarlyView.
The chiral point group determines the arrangement of the μ‐m of chiral organic small molecules, thereby influencing their chiral photoelectric properties. In particular, chiral molecules with the D2 point group can effectively align the μ‐m to be either 0° or 180°, an effective strategy for high‐performance circularly polarized light photodetectors ...
Zhenping Li, Wenkai Zhao, Jiajun Fu, Wenhan Wu, Xingshuo Chu, Zihao Xu, Yu‐Wu Zhong, Hao‐Li Zhang, Wei Ma, Guankui Long, Xiaobo Shang   +10 more
wiley   +1 more source

Upper Limits on the Gamma-Ray Emission from the Microquasar V4641 Sgr

The Astrophysical Journal
Following a recent detection of TeV radiation by the Large High Altitude Air Shower Observatory and the High-Altitude Water Cherenkov Observatory, coincident with the direction of the microquasar V4641 Sgr, we search for possible GeV emission from this ...
Zihao Zhao, Jian Li, Diego F. Torres
doaj   +1 more source

Synthesis of Core–Shell Te@Se Quantum Dots and Their Broadband Photodetector Performance in Low Concentration Electrolytes

Laser &Photonics Reviews, EarlyView.
Te@Se core–shell heterojunction quantum dots (QDs) are synthesized by a two‐step strategy via combining liquid‐phase exfoliation and epitaxial growth. As active materials in photoelectrochemical photodetectors, Te@Se QDs exhibit excellent photo‐response performance in low‐concentration electrolytes and deionized water.
Yiming Zhao, Artem V. Kuklin, Jiahui Hou, Mingqi He, Lyudmila V. Begunovich, Han Zhang, Ying Li, Hans Ågren, Lingfeng Gao   +8 more
wiley   +1 more source