Results 111 to 120 of about 440 (199)

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

Cumulene carbenes in TMC-1: Astronomical discovery of <i>l</i>-H₂C₅ ^★. [PDF]

Astron Astrophys, 2021
Cabezas C, Tercero B, Agúndez M, Marcelino N, Pardo JR, de Vicente P, Cernicharo J.   +6 more
europepmc   +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

Mechanisms for the circular polarization of astrophysical OH masers in star-forming regions and the inferred magnetic fields

, 1987
Results of further calculations to explore the cause for the circular polarization of astrophysical OH masers in regions of star formation are presented.
Watson, William D., Deguchi, Shuji
core  

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

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

A RELATIONSHIP BETWEEN MHD TURBULENCE AND THE POLARIZED SPECTRA OF ASTROPHYSICAL MASERS

, 2004
Author Institution: University of Illinois; Institute of Astronomy of the RAS; University of IllinoisWe consider astrophysical maser radiation that is created in the presence of mildly supersonic, magnetohydrodynamic (MHD) turbulence. The focus is on the
McKinney, Jonathan C., Wiebe, Dmitri S., Gammie, Charles F., Watson, William D.   +3 more
core  

A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei

, 2017
Using the Green Bank Telescope, we have conducted a survey for 1.3 cm water maser emission toward the nuclei of nearby active galaxies, the most sensitive large survey for H2O masers to date. Among 145 galaxies observed, maser emission was newly detected
Henkel, C., Wilson, A. S., Greenhill, Lincoln, Braatz, J. A., Moran, James   +4 more
core   +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