The Physics and Dynamics of Planetary NebulaeSpringer Science & Business Media, 17 d’abr. 1997 - 513 pàgines Planetary nebulae are the classic subject of astrophysics. The physical pro cesses occurring in this highly ionized gaseous medium, the formation of emis sion lines in clearly specified conditions, the continuous emission extending from the far ultraviolet up to infrared and radio frequencies, the generation of exotic forms of radiation predicted by atomic physics, along with methods for deciphering the observed spectra and detecting physical and kinematic parameters of the radiating medium, etc. - all these problems form the solid foundations of the physical theory of gaseous nebulae. They are an essential part of the arsenal of powerful tools and concepts without which one cannot imagine understanding and interpreting the enormous diversity of processes taking place in the Universe - in gaseous envelopes surrounding the stars of various classes, from cool dwarfs and flare stars up to hot supergiants, as well as in stellar chromospheres and coronae, in atmospheres of unstable and anomalous stars, in circumstellar clouds and gaseous shells born in nova and supernova explosions, in diffuse nebulae and the interstellar medium, in interacting binary systems, in galaxies with emission lines, in quasars, etc. The last thirty years have seen a turning-point in our knowledge concern ing the very nature of planetary nebulae (PNs). The radio emission of PNs was discovered after it was predicted theoretically. On the other hand, the powerful infrared emission discovered both in the continuum and in emission lines was never expected. |
Continguts
1 Global Concepts | 1 |
2 The Origin of Emission Lines | 27 |
3 Emission Lines of Hydrogen and Helium | 53 |
4 Ionization Equilibrium of Planetary Nebulae | 79 |
5 Temperature of Nebular Nuclei | 99 |
6 Electron Temperature | 123 |
7 Planetary Nebulae in the Ultraviolet | 147 |
8 Pseudoresonance Lines | 187 |
13 DoubleEnvelope Nebulae | 279 |
15 Anomalous Planetary Nebulae | 307 |
NGC 7027 | 307 |
14 Radio Emission of Planetary Nebulae | 307 |
NGC 7027 | 321 |
16 Dynamics of Planetary Nebulae | 357 |
R | 400 |
0168 | 411 |
9 Continuous Radiation of Nebulae | 199 |
10 Infrared Radiation of Planetary Nebulae | 223 |
Classical Theory | 243 |
12 Distances and Dimensions | 261 |
Catalogue of Excitation Classes p | 475 |
Plates | 479 |
482 | |
Altres edicions - Mostra-ho tot
The Physics and Dynamics of Planetary Nebulae Grigor A. Gurzadyan Previsualització no disponible - 2010 |
The Physics and Dynamics of Planetary Nebulae Grigor A. Gurzadyan Previsualització no disponible - 1997 |
Frases i termes més freqüents
absorption line Balmer decrement bipolar central star Chap coefficient continuous spectrum continuum density dependence determined diffuse nebulae dipole distance double-envelope doublet dust particles effective temperature electron concentration electron temperature emission lines emitted energy equation ergs evolution excitation class expansion velocity F(HB forbidden lines free electrons frequency Galactic Galaxy gaseous envelope gaseous nebulae given Gurzadyan HeII Hell hydrogen atoms hydrogen lines infrared inner intensities interstellar extinction interstellar medium ionized helium ions isophotes luminosity magnetic field magnitude mass method MgII N₁ neutral hydrogen nuclei nuclei of PNs number of PNs objects observed obtained OIII optical depth optically thick outer envelope parameters photons Planetary Nebulae problem pseudoresonance lines r₁ radiation radio fluxes radius ratio region result second envelope spectra stellar wind structure Table theoretical thermal total number transitions two-photon emission ultraviolet wavelength