Results 71 to 80 of about 4,740 (197)

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

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

New class I methanol masers [PDF]

, 2012
We review properties of all known collisionally pumped (class I) methanol maser series based on observations with the Australia Telescope Compact Array (ATCA) and the Mopra radio telescope.
A. J. Walsh, A. M. Sobolev, Ellingsen, Fontani, J. A. Green, J. L. Caswell, Kalenskii, M. A. Voronkov, Minier, S. L. Breen, S. P. Ellingsen, Sobolev, T. R. Britton, Voronkov, Voronkov, Voronkov, Voronkov   +16 more
core   +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

First Results from a 1.3 cm EVLA Survey of Massive Protostellar Objects: G35.03+0.35

, 2011
We have performed a 1.3 centimeter survey of 24 massive young stellar objects (MYSOs) using the Expanded Very Large Array (EVLA). The sources in the sample exhibit a broad range of massive star formation signposts including Infrared Dark Clouds (IRDCs ...
Brogan, C. L., Chandler, C. J., Cyganowski, C. J., Friesen, R. K., Hunter, T. R., Indebetouw, R.   +5 more
core   +1 more source

Multi-epoch VLBI of a double maser super burst [PDF]

, 2018
In a rare and spectacular display, two well-known massive star forming regions, W49N and G25.65+1.05, recently underwent maser 'super burst' - their fluxes suddenly increasing above 30,000 and 18,000 Jy, respectively, reaching several orders of magnitude
Baan, Willem, Bayandina, Olga, Blanchard, Jay, Brogan, Crystal, Burns, Ross A., Chibueze, James O., Hirota, Tomoya, Hunter, Todd, Immer, Katharina, Kim, Kee-Tae, Kramer, Busaba, Kurtz, Stan, MacLeod, Gordon, Marcote, Benito, Olech, Mateusz, Orosz, Gabor, Rudnitskii, Georgij, Shakhvorostova, Nadya, Surcis, Gabriele, Valtts, Irina, van Langevelde, Huib, Volvach, Alexandr, Volvach, Larisa   +22 more
core   +2 more sources

Spectral Structures of Jovian Broadband Kilometric Radiation Revealed by Cassini and Juno

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract Cassini flew past Jupiter in 2000/2001, and Juno has been orbiting the gas giant since mid‐2016. Here we focus on the spectral properties of Jovian broadband kilometric radiation (bKOM), and we classified them according to their slope in the time–frequency spectrum and distinguish four categories with negative, positive, mixed, or no slope in ...
G. Fischer, U. Taubenschuss, D. Píša, M. Imai, W. S. Kurth   +4 more
wiley   +1 more source

A search for 4750- and 4765-MHz OH masers in Southern Star Forming Regions [PDF]

, 2002
We have used the Australia Telescope Compact Array (ATCA) to make a sensitive (5-$\sigma$ $\simeq$ 100 mJy) search for maser emission from the 4765-MHz $^2\Pi_{1/2}$ F=1$\to$0 transition of OH.
Baudry, Baudry, Baudry, Baudry, Baudry, Braz, Caswell, Caswell, Caswell, Caswell, Caswell, Caswell, Caswell, Caswell, Caswell, Caswell, Cesaroni, Cohen, Cohen, Cragg, Cragg, Desmurs, Destombes, Elitzur, Elitzur, Forster, Gardner, Gardner, Gardner, Gardner, Gaume, Gray, Gray, Haynes, Kylafis, MacLeod, MacLeod, Masheder, Palmer, Pavlakis, Pavlakis, Pavlakis, R. G. Dodson, Radford, Reid, S. P. Ellingsen, Smits, Smits, Smits, Sutton, Szymczak, Zuckerman   +51 more
core   +2 more sources

Ray Tracing for Jupiter's Icy Moon Ionospheric Occultation of Jovian Auroral Radio Sources

Journal of Geophysical Research: Space Physics, Volume 129, Issue 6, June 2024.
Abstract The ionospheres of Jupiter's icy moons have been observed by in situ plasma measurements and radio science. However, their spatial structures have not yet been fully characterized. To address this, we developed a new ray tracing method for modeling the radio occultation of the ionospheres using Jovian auroral radio sources. Applying our method
Rikuto Yasuda, Tomoki Kimura, Hiroaki Misawa, Fuminori Tsuchiya, Baptiste Cecconi, Yasumasa Kasaba, Shinnosuke Satoh, Shotaro Sakai, Corentin K. Louis   +8 more
wiley   +1 more source