Results 81 to 90 of about 173 (158)

Survey of S-type AGB Stars Using the KVN Four-band Receiving System: SMASTES II

The Astronomical Journal
We present the observational results of Simultaneous Multi-mAser Survey Toward Evolved Stars (SMASTES) II for 150 S-type asymptotic giant branch stars. Observations have been performed from 2023 September to 2024 March using the upgraded wide four-band ...
Seong-Min Son, Se-Hyung Cho, Jaeheon Kim, Hyeon Baek, Dong-Hwan Yoon, Kyung-Won Suh   +5 more
doaj   +1 more source

Survey of Oxygen-rich AGB Stars Using the KVN 4 Receiving Bands—SMASTES. I.

The Astronomical Journal
Simultaneous observations of 19 H _2 O and SiO maser and thermal lines were performed toward 155 M-type oxygen-rich (O-rich) AGB stars. We used the upgraded four-band (22/43/86/129 GHz) wide receiving system of the Korean VLBI Network (KVN).
Hyeon Baek, Se-Hyung Cho, Jaeheon Kim, Seung-Min Son, Dong-Hwan Yoon, Kyung-Won Suh   +5 more
doaj   +1 more source

Time variability of astrophysical masers [PDF]

Monthly Notices of the Royal Astronomical Society, 1978
M. Salem, M. S. Middleton
openaire   +1 more source

Maser Radiation in an Astrophysical Context (Overview)

, 2013
In this paper we will look at the phenomenon of Microwave Amplification by Stimulated Emission of Radiation (a maser system). We begin by deriving amplification by stimulated emission using time-dependent perturbation theory, in which the perturbation provided by external radiation.
openaire   +2 more sources

Numerical simulations of astrophysical cyclotron-maser emission [PDF]

, 2016
[Abstract unavailable]
Speirs, D. C., Bingham, R., Ronald, K., Phelps, A.D.R., McConville, S.L., Gillespie, K.M., Cairns, R. A., Kellett, B.J., Vorgul, I., Cross, A.W.   +9 more
openaire   +1 more source

Cloud-cloud collision as drivers of the chemical complexity in Galactic Centre molecular clouds. [PDF]

Mon Not R Astron Soc, 2020
Zeng S, Zhang Q, Jiménez-Serra I, Tercero B, Lu X, Martín-Pintado J, de Vicente P, Rivilla VM, Li S.   +8 more
europepmc   +1 more source

Discovering the sky at the longest wavelengths with a lunar orbit array. [PDF]

Philos Trans A Math Phys Eng Sci, 2021
Chen X, Yan J, Deng L, Wu F, Wu L, Xu Y, Zhou L.   +6 more
europepmc   +1 more source

Maser radiation from astrophysical jets

, 2016
Electromagnetic radiation from jets is normally considered to be incoherent synchrotron emission. Some aspects of radiation from both stellar and extragalactic jets could, however, be due to coherent emission mechanisms. Coherent radiation mechanisms have the advantage of being able to account for the high brightness temperatures inferred from some ...
Bingham, R, Cairns, R, Dawson, J, Tonge, J, Mendonca, J   +4 more
openaire   +1 more source

Coherent Radio Emission from “Main-sequence Radio Pulse Emitters”: A New Stellar Diagnostic to Probe 3D Magnetospheric Structures

The Astrophysical Journal
Main-sequence radio pulse emitters (MRPs) are magnetic early-type stars that produce coherent radio emission observed in the form of periodic radio pulses. The emission mechanism behind this is the electron-cyclotron maser emission (ECME).
Barnali Das, Poonam Chandra, Véronique Petit   +2 more
doaj   +1 more source

SiO, ²⁹SiO, and ³⁰SiO emission from 67 oxygen-rich stars. A survey of 61 maser lines from 7 to 1 mm. [PDF]

Astrophys J Suppl Ser, 2021
Rizzo JR, Cernicharo J, Garoía-Miró C.
europepmc   +1 more source