Results 51 to 60 of about 173 (158)

Maser Investigation toward Off-Plane Stars (MIOPS): Detection of SiO Masers in the Galactic Thick Disk and Halo

The Astrophysical Journal
Studying stars that are located off the Galactic plane is important for understanding the formation history of the Milky Way. We searched for SiO masers toward off-plane O-rich asymptotic giant branch (AGB) stars from the catalog presented by Mauron et ...
Wenjin Yang, Yuanwei Wu, Yan Gong, Nicolas Mauron, Bo Zhang, Karl M. Menten, Xiaofeng Mai, Dejian Liu, Juan Li, Jingjing Li   +9 more
doaj   +1 more source

Spatial Distribution and Plasmaspheric Ducting of Auroral Kilometric Radiation Revealed by Wind, Polar, and Arase

AGU Advances, Volume 6, Issue 4, August 2025.
Abstract Auroral Kilometric Radiation (AKR), the dominant radio emission from Earth, has been extensively studied, though previous analyses were constrained by limited spacecraft coverage. This study utilizes long‐term observations from Polar, Wind, and Arase spacecraft to generate comprehensive global AKR occurrence rate maps, revealing a high ...
Siyuan Wu, Daniel K. Whiter, Sai Zhang, Ulrich Taubenschuss, Philippe Zarka, Georg Fischer, Laurent Lamy, Shengyi Ye, James Waters, Baptiste Cecconi, Ping Li, Caitriona M. Jackman, Alexandra R. Fogg, Claire Baskevitch, Yoshiya Kasahara, Yasumasa Kasaba   +15 more
wiley   +1 more source

The Detection of H2O Maser Emission from Mid-IR Red Galaxies

The Astrophysical Journal
We report the detection of H _2 O maser emission in 4 out of 77 (5.2%) mid-IR red galaxies that meet the color criteria of W 1 − W 2 > 0.5 and W 1 − W 4 > 7 and are classified as Type 2 active galactic nuclei (AGNs) based on optical, near-IR, and mid-IR ...
C. Y. Kuo, C. Y. Tai, A. Constantin, J. A. Braatz, H. H. Chung, B. Y. Chen, D. W. Pesce, C. M. V. Impellizzeri, F. Gao, Y.-Y. Chang   +9 more
doaj   +1 more source

Analysis, Testing, and Design of a UHF and HF Peer‐to‐Peer Communication System for the Europan Cryosphere

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract This study presents a validated design of a dual‐band wireless relay system of “pucks” for through‐ice communication between a cryobot and a surface lander during a future exploration of the Europan cryosphere. The design of a terrestrial demonstration system and the results of a 103 m through‐ice system test in a relevant environment near ...
Jake Sahli, Albin J. Gasiewski, William C. Stone, Brian Pease, Veronica Guerrero, Vickie Siegel, Justin Smith   +6 more
wiley   +1 more source

The Benefit of Space Clocks for the Deep Space Network

Radio Science, Volume 60, Issue 8, August 2025.
Abstract Ground‐based atomic clocks have been the foundation of the Deep Space Network's (DSN's) ability to provide high‐precision tracking to deep space users for navigation and radio science since its inception in the mid‐1960s. This paper describes the development of space clocks that could aid the DSN and the solar system exploration enterprise ...
T. Ely, E. Burt, K. Cheung, R. Tjoelker
wiley   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Large-scale Effect of an Accretion Burst in the High-Mass Young Stellar Object G358.93-0.03-MM1

The Astronomical Journal
The high-mass young stellar object G358.93-0.03-MM1 underwent a rapid accretion burst event from 2019 January to June, resulting in flares observed in most class II methanol maser transitions starting in mid-January.
Dan Miao, Xi Chen, Olga S. Bayandina, Andrej M. Sobolev, Wan-jun Li, Koichiro Sugiyama   +5 more
doaj   +1 more source

The Radio Wave Polarization of Saturn Lightning Observed by Cassini

Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz ...
G. Fischer, M. Imai, U. Taubenschuss, D. Píša, W. S. Kurth   +4 more
wiley   +1 more source

Unveiling Ionized Jet Morphologies: Subarcsecond VLA Observations of Compact Radio Sources

The Astronomical Journal
We present subarcsecond ( θ ∼ 0 $\mathop{.}\limits^{\unicode{x02033}}$ 1) resolution VLA 1.3 cm continuum and 22.2 GHz H _2 O maser observations toward 15 compact radio continuum sources with rising spectral index and eight string-like radio continuum ...
Tatiana M. Rodríguez, Peter Hofner, Emmanuel Momjian, Esteban D. Araya, Ananay Sethi, Viviana Rosero   +5 more
doaj   +1 more source