Results 81 to 90 of about 421,913 (232)

Enhanced Radiation Exposure of Airline Crew and Passengers During the May 2024 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Enhanced radiation at aviation altitudes is a concern for flight crew and passengers. During space weather events, solar flares and coronal mass ejection (CME) driven shocks are sources of energetic particles that can reach Earth's near‐space environment and interact with its magnetic field and atmosphere.
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Benjamin Hogan, Rashmi Siddalingappa, Harshitha Challa   +6 more
wiley   +1 more source

Star Formation in the Lopsided Galaxy Arp 291

The Astrophysical Journal
We have investigated the star formation process taking place in the lopsided galaxy Arp 291, based on narrowband images in the H α , [N ii ] λ 6583, and [O iii ] λ 5007 emission lines, obtained using the modern tunable photometer MaNGaL at the Caucasus ...
Irina S. Proshina, Dmitriy V. Oparin
doaj   +1 more source

A Chandra Virgo cluster survey of spiral galaxies – I. Introduction to the survey and a new ULX sample [PDF]

, 2022
Roberto Soria, Mari Kolehmainen, Alister W. Graham, Douglas A. Swartz, Mihoko Yukita, C. Motch, T. H. Jarrett, J. C. A. Miller‐Jones, Richard M. Plotkin, Thomas J. Maccarone, Laura Ferrarese, Alexander Guest, A. Lançon   +12 more
openalex   +1 more source

Characterisation of a Novel Jumbo Lytic Aeromonas dhakensis Bacteriophage P19 and Its Endolysin

Microbial Biotechnology, Volume 19, Issue 1, January 2026.
A jumbo, lytic myovirus phage P19 against multidrug‐resistant (MDR) Aeromonas dhakensis was isolated from river water. P19 demonstrated robust lytic activity, high thermal and pH stability (pH 6–10, up to 60°C), and no genes associated with lysogeny, virulence or antimicrobial resistance. ORF_358 of P19 encodes for T4‐type lysozyme.
Farhat Ansari, Vandan Nagar
wiley   +1 more source

A dynamical model for the heavily ram pressure stripped Virgo spiral galaxy NGC 4522 [PDF]

, 2006
Context. Recent Hi and H α observations of NGC 4522 have revealed that this spiral galaxy represents one of the best cases of ongoing ram pressure stripping in the Virgo cluster. Aims.
B. Vollmer, M. Soida, K. Otmianowska-Mazur, J. Kenney, J. Gorkom, R.Beck Cds, O. Strasbourg, F. A. Observatory, Kraków, Poland Yale University, Usa, Columbia University, M. F. Radioastronomie, Bonn, H Germany   +14 more
semanticscholar   +1 more source

Solar Energetic Particle Events During May 2024 Geomagnetic Superstorm

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Three solar energetic particle (SEP) events originating from solar active region 13664 occurred on 10–16 May 2024, coinciding with a geomagnetic superstorm. Using data from the Geostationary Operational Environmental Satellites and Meteorological Operational satellite‐C, we investigate the energetic proton fluxes and east‐west flux ratios in ...
Zhenghao She, Hui Zhu, Xiangliang Kong, Yao Chen, Yingying Zhao, Huicong Chen, Zhijie Qin, Wenqing Ma   +7 more
wiley   +1 more source

Hierarchical Star Formation in the Spiral Galaxy NGC 628 [PDF]

, 2006
The distributions of size and luminosity for star-forming regions in the nearby spiral galaxy NGC 628 are studied over a wide range of scales using progressively blurred versions of an image from the Hubble Space Telescope Advanced Camera for Surveys ...
B. Elmegreen, D. Elmegreen, R. Chandar, B. Whitmore, M. Regan   +4 more
semanticscholar   +1 more source

Commissioning of a combined stereoscopic x‐ray and surface guided radiotherapy system for performing breath hold gated lung radiotherapy

Journal of Applied Clinical Medical Physics, Volume 26, Issue 12, December 2025.
Abstract Background ExacTrac Dynamic (ETD) is a novel patient positioning and motion management system for radiation therapy that combines surface guidance, thermal imaging, and stereoscopic x‐rays for image guidance. This combination of technology enables both intrafraction monitoring and surface‐based breath hold gating capabilities.
Garrett C. Baltz, Steven M. Kirsner
wiley   +1 more source

H i power spectrum of the spiral galaxy NGC 628 [PDF]

, 2007
We have measured the H I power spectrum of the nearly face-on spiral galaxy NGC 628 (M74) using a visibility-based estimator. The power spectrum is well fitted by a power law P(U) =AU α, with α=−1.6 ± 0.2 over the length-scale 800 pc to 8 kpc.
P. Dutta, A. Begum, S. Bharadwaj, J. Chengalur   +3 more
semanticscholar   +1 more source

Determining the parameters of the spiral arms of the Galaxy from kinematic tracers based on Gaia DR3 data [PDF]

, 2023
S. I. Denyshchenko, P. N. Fedorov, V. S. Akhmetov, A. B. Velichko, Artem Dmytrenko   +4 more
openalex   +1 more source