Titlebook: Astronomical Masers; Moshe Elitzur Book 1992 Springer Science+Business Media Dordrecht 1992 Galaxy.astronomy.astrophysics.star.stars.stell

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書目名稱Astronomical Masers影響因子(影響力)




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書目名稱Astronomical Masers網(wǎng)絡(luò)公開度學科排名




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書目名稱Astronomical Masers讀者反饋學科排名

intricacy

Basic Background Concepts,motions). The problem of the kinetic theory of gases is to determine the distributions of the thermal velocities and of the level populations. This task is complicated by the fact that these distributions are determined by the combined effects of a number of competing mechanisms, including collision

Synchronism

Maser Theory,In this approximation the vector nature of the electric field is ignored, resulting in considerable simplifications. Most of the essential features of complete theory are preserved; the only important property lost is polarization, discussed separately in chapter 6.

萬神殿

upstart

Polarization,m Maxwell’s equations, the electric field of electromagnetic radiation is perpendicular to the propagation direction. In the case of monochromatic waves, the tip of the field vector traces a well-defined figure in the transverse plane, usually an ellipse, a property referred to as .. Real radiation

outer-ear

發(fā)芽

The Environments of Astronomical Masers,iled descriptions of various maser sources in the following chapters. The discussion here is necessarily brief, and concentrates on concepts and processes with the most relevance to maser operation. This astronomical background material can be supplemented by the following references: the book . by

antidote

OH Masers,963) and the first astronomical maser ever discovered (Weaver et al. 1965). This molecule still provides the largest variety of astronomical sources displaying maser activity. Strong OH maser emission is observed in both star-forming regions and late-type stars. Weak maser effects are prevalent in l

聾子

H2O Masers,ansition (figure 3.2) toward a number of star-forming regions using the 20 foot radio telescope of the University of California Hat Creek Observatory. The emission was rather strong, antenna temperatures as high as 60 K, even though the transition levels lie more than 600 K above ground and would re

蠟燭

SiO Masers, Orion molecular cloud. The narrow linewidths and the compactness of the emission region suggested that this was a new maser, which Snyder and Buhl promptly identified as the . = 2 → 1 transition of the first vibrationally excited state (. = 1) of SiO. The almost immediate detection of two more rota