Results 71 to 80 of about 478 (176)

ALMA Detection of Masers and Dasars in the Hydrogen Recombination Lines of the Planetary Nebula Mz3

The Astrophysical Journal
The hydrogen recombination lines H30 α , H40 α , H42 α , H50 β , and H57 γ and the underlying bremsstrahlung continuum emission were detected with ALMA in the bipolar nebula Mz3.
Zulema Abraham, Pedro P. B. Beaklini, Isabel Aleman, Raghvendra Sahai, Albert Zijlstra, Stavros Akras, Denise R. Gonçalves, Toshiya Ueta   +7 more
doaj   +1 more source

Class I methanol masers: Masers with EGOs

, 2009
8 pages, 4 tables, accepted to be published in ...
Chen, Xi, Ellingsen, Simon, Shen, Zhi-Qiang   +2 more
openaire   +2 more sources

Distribution Properties of the 6.7 GHz Methanol Masers and Their Surrounding Gases in the Milky Way

The Astrophysical Journal
An updated catalog consisting of 1092 6.7 GHz methanol maser sources is reported in this work. Additionally, the NH _3 (1, 1), NH _3 (2, 2), and NH _3 (3, 3) transitions were observed toward 214 star-forming regions using the Shanghai Tianma radio ...
Tian Yang, Xi Chen, Yan-Kun Zhang, Xu-Jia Ouyang, Shi-Min Song, Jia-Liang Chen, Ying Lu   +6 more
doaj   +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

A Map of the Outer Gas Disk of the Galaxy with Direct Distances from Young Stars

The Astrophysical Journal
For more than 50 yr, astronomers have mapped the neutral hydrogen gas in the Galaxy assuming kinematically derived distances. We employ the distances of nearby young stars, which trace the gas from which they formed, in longitude–latitude–velocity space ...
Peter Craig, Sukanya Chakrabarti, Alexander R. Pettitt, Robyn Sanderson, Erik Rosolowsky   +4 more
doaj   +1 more source

N-Heteroacenes as an Organic Gain Medium for Room-Temperature Masers. [PDF]

Chem Mater, 2023
Attwood M, Xu X, Newns M, Meng Z, Ingle RA, Wu H, Chen X, Xu W, Ng W, Abiola TT, Stavros VG, Oxborrow M.   +11 more
europepmc   +1 more source

Investigating Asymmetry Development from SiO to H2O Maser Regions in VX Sagittarii

The Astronomical Journal
Simultaneous very-long-baseline interferometry monitoring observations of H _2 O and SiO masers toward VX Sagittarii were conducted from 2014 February to 2019 January.
Dong-Hwan Yoon, Se-Hyung Cho, Youngjoo Yun, Haneul Yang, Jaeheon Kim   +4 more
doaj   +1 more source

Research on an Active Hydrogen Maser Digital Circuit Control System Based on FPGA. [PDF]

Sensors (Basel), 2023
Hu W, Shuai T, Xie Y, Chen P, Pei Y, Zhao Y, Wang R.   +6 more
europepmc   +1 more source

Enhanced quantum sensing with room-temperature solid-state masers. [PDF]

Sci Adv, 2022
Wu H, Yang S, Oxborrow M, Jiang M, Zhao Q, Budker D, Zhang B, Du J.   +7 more
europepmc   +1 more source

Room-Temperature Solid-State Maser Amplifier

Physical Review X
Masers once represented the state of the art in low-noise microwave amplification technology but eventually became obsolete due to their need for cryogenic cooling.
Tom Day, Maya Isarov, William J. Pappas, Brett C. Johnson, Hiroshi Abe, Takeshi Ohshima, Dane R. McCamey, Arne Laucht, Jarryd J. Pla   +8 more
doaj   +1 more source