Results 71 to 80 of about 43,788 (263)

Pulsating in unison at optical and X-ray energies: simultaneous high-time resolution observations of the transitional millisecond pulsar PSR J1023+0038

, 2019
PSR J1023+0038 is the first millisecond pulsar discovered to pulsate in the visible band; such a detection took place when the pulsar was surrounded by an accretion disk and also showed X-ray pulsations.
Ambrosino, F., Bozzo, E., Burderi, L., Campana, S., Casella, P., Dallilar, Y., de Martino, D., Di Salvo, T., Eikenberry, S., Ferrigno, C., Ghedina, A., Israel, G. L., Meddi, F., Onori, F., Papitto, A., Piranomonte, S., Rea, N., Riggio, A., Sanna, A., Serrano, S., Stella, L., Torres, D. F., Veledina, A., Zampieri, L., Zelati, F. Coti   +24 more
core   +1 more source

Analytical Description of the Distributions of Primary and Secondary Cosmogenic Particles

Advances in High Energy Physics, Volume 2026, Issue 1, 2026.
In this work, we present an analytical description of the energy distributions of primary and secondary cosmogenic particles on Earth in terms of parameters having clear physical meaning. A modified power law is assumed for energy distributions, incorporating terms such as energy loss/decay, which are effective at low energies, and a source term, which
Shvetaank Tripathi, Prashant Shukla, Subhash Singha   +2 more
wiley   +1 more source

NiCu/Al2O3 Bimetallic Catalysts for Reductive Amination of Polyether 230: Synergistic Effects of Alloy Formation and Amorphous Support Properties

Journal of Chemistry, Volume 2026, Issue 1, 2026.
The development of efficient and scalable catalysts for polyether amine (PEA) synthesis via reductive amination remains an enduring industrial challenge. In this study, bimetallic NiCu alloys supported on amorphous alumina were rationally designed for the amination of low‐molecular‐weight polyether (PPG‐230).
Hongyan Yu, Majishi Wang, Yuqian Zhang, Zhirong Chen, Lidan He, Hong Yin, Pengfei Gu, Jianfei An, Yifeng Jin, Sohini Basu Roy   +9 more
wiley   +1 more source

Multiwavelength Study of HESS J0632+057: New Insights into Pulsar–Disk Interaction

The Astrophysical Journal
We present an analysis of new multiwavelength observations of the TeV gamma-ray binary HESS J0632+057, conducted using SALT, Swift, NuSTAR, and VERITAS in 2023–2024.
Jaegeun Park, Hongjun An, Chanho Kim, Natalie Matchett, Kaya Mori, Brian van Soelen, A. Archer, P. Bangale, J. T. Bartkoske, W. Benbow, J. H. Buckley, Y. Chen, A. J. Chromey, A. Duerr, M. Errando, M. Escobar Godoy, A. Falcone, S. Feldman, Q. Feng, S. Filbert, L. Fortson, A. Furniss, W. Hanlon, O. Hervet, C. E. Hinrichs, J. Holder, T. B. Humensky, W. Jin, M. N. Johnson, P. Kaaret, M. Kertzman, M. Kherlakian, D. Kieda, T. K. Kleiner, N. Korzoun, S. Kumar, M. J. Lang, M. Lundy, G. Maier, P. Moriarty, R. Mukherjee, M. Ohishi, R. A. Ong, A. Pandey, M. Pohl, E. Pueschel, J. Quinn, P. L. Rabinowitz, K. Ragan, D. Ribeiro, E. Roache, I. Sadeh, L. Saha, G. H. Sembroski, R. Shang, J. V. Tucci, V. V. Vassiliev, A. Weinstein, D. A. Williams, S. L. Wong, T. Yoshikoshi, (VERITAS Collaboration)   +61 more
doaj   +1 more source

The nebula around pulsar B1853+01 in X-rays

Astronomy & Astrophysics
We report on the results of a comprehensive analysis of X-ray observations with Chandra, XMM-Newton and NuSTAR of the pulsar wind nebula (PWN) associated with PSR B1853+01, located inside the W44 supernova remnant (SNR).
Zhang Xiying, Bordas Pol, Safi-Harb Samar, Iwasawa Kazushi   +3 more
doaj   +1 more source

Detection of an X-ray Pulsation for the Gamma-ray Pulsar Centered in CTA 1

, 2010
We report the detection of X-ray pulsations with a period of ~315.87 ms from the 2009 XMM-Newton observation for the radio-quiet gamma-ray pulsar, LAT PSR J0007+7303, centered in the supernova remnant CTA 1.
Abdo, Abdo, Braje, Caraveo, Caraveo, de Jager, Halpern, Halpern, Halpern, Halpern, Kargaltsev, Leahy, Saz Parkinson, Slane, Slane, Thompson, Zavlin, Zhang   +17 more
core   +1 more source

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source

Optical observations of PSR J2021+3651 in the Dragonfly Nebula with the GTC

, 2015
PSR J2021+3651 is a 17 kyr old rotation powered pulsar detected in the radio, X-rays, and $\gamma$-rays. It powers a torus-like pulsar wind nebula with jets, dubbed the Dragonfly, which is very similar to that of the Vela pulsar.
Cabrera-Lavers, Antonio, Danilenko, Andrey, Durant, Martin, Kargaltsev, Oleg, Kirichenko, Aida, Pavlov, George, Ryspaeva, Elizaveta, Shibanov, Yuriy, Shternin, Peter, Zyuzin, Dima   +9 more
core   +1 more source

Discovery of an Energetic Pulsar Associated with SNR G76.9+1.0 [PDF]

, 2011
We report the discovery of PSR J2022+3842, a 24 ms radio and X-ray pulsar in the supernova remnant G76.9+1.0, in observations with the Chandra X-ray telescope, the Robert C. Byrd Green Bank Radio Telescope, and the Rossi X-ray Timing Explorer (RXTE). The
Arzoumanian, Z., Gotthelf, E. V., Kothes, R., Landecker, T. L., Ransom, S. M., Safi-Harb, S.   +5 more
core   +3 more sources

A new green synthesis approach using sodium palmitate in the synthesis of a Ni/Al2O3 catalyst for CO2 methanation

The Canadian Journal of Chemical Engineering, Volume 103, Issue 11, Page 5173-5188, November 2025.
Abstract CO2 methanation with Ni/Al2O3 catalysts is a key technology for converting CO2 emissions into sustainable methane. However, conventional impregnation synthesis often results in poor nickel dispersion and in the emission of gaseous NOx species.
Anderson F. C. Silva, Eduardo L. de Barros Neto, Bruna R. de Vasconcelos   +2 more
wiley   +1 more source