Results 61 to 70 of about 4,740 (197)
Masers and Star Formation Activities in W51A
The Astronomical JournalConcurrently with the maser flare observed in W51-North during the 3 month monitoring of H _2 O, NH _3 , and CH _3 OH maser variability from 2020 January to April using the Tianma 65 m Radio Telescope, we conducted Very Large Array mappings for these ...
Yan-Kun Zhang +5 more
doaj +1 more source
Current stage of the ATCA follow-up for SPLASH
, 2017 Four ground-state OH transitions were detected in emission, absorption and maser emission in the Southern Parkes Large-Area Survey in Hydroxyl (SPLASH).
Qiao, Hai-Hua +2 more
core +1 more source
Maser, infrared and optical emission for late-type stars in the Galactic plane [PDF]
, 2017 Radio astrometric campaigns using VLBI have provided distances and proper motions for masers associated with young massive stars (BeSSeL survey). The ongoing BAaDE project plans to obtain astrometric information of SiO maser stars located in the inner ...
Brown, A. G. A. +6 more
core +3 more sources
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 +15 more
wiley +1 more source
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 +6 more
wiley +1 more source
Ground-State SiO Maser Emission Toward Evolved Stars
, 2004 We have made the first unambiguous detection of vibrational ground-state maser emission from SiO toward six evolved stars. Using the Very Large Array, we simultaneously observed the v=0, J=1-0, 43.4-GHz, ground-state and the v=1, J=1-0, 43.1-GHz, first ...
Alcolea J. +8 more
core +1 more source
Collisional excitation of OH(6049 MHz) masers in supernova remnant - molecular cloud interactions [PDF]
, 2007 OH (1720 MHz) masers serve as indicators of SNR - molecular cloud interaction sites. These masers are collisionally excited in warm (50-100K) shocked gas with densities of order 1e5 cm^-3 when the OH column density is in the range 1e16-1e17 cm^-2. Here I
Destombes, Mark Wardle
core +2 more sources
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
Images of Astrophysical Masers and their Variability in a Turbulent Medium: The 25 GHz Methanol Masers [PDF]
The Astrophysical Journal, 2003 We examine the influence of chance coherences in turbulent velocities for the creation of the images of astrophysical masers. Images are computed that represent the numerous masing features that are commonly observed in an extended masing region. Changes as a function of Doppler velocity can be seen in the appearance of these images. Variability in the
Sobolev, A. M. +2 more
openaire +2 more sources
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 +13 more
wiley +1 more source