... Manifestations of the Stellar Wind of the Central Star of a PlanetaryNebula ... Oxygen Ions in the Spectra of PlanetaryNebulas - Part Two - Intensities of the CII ...
... of the object as a pre-main-sequence star or a young planetarynebula is problematic ... an excretion disk (Hartmann et al. 1980); 3. a young planetarynebula (Ciatti et al ...
... When a planetarynebula is formed, the matter of the outer stellar layers becomes the nebula's matter. ... PLANETARY NEBULAE Based on a synthetic model for the evolution of PNe (van den Hoek and Groenewegen 1997; Groenewegen and ...
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Ссылки http://www.astro.spbu.ru/staff/afk/Papers/2006/ChEv2006E.pdf -- 668.5 Кб -- 19.11.2010 Похожие документы
... The discovery of carbonates in a planetarynebula suggests that other mechanisms to form carbonates must exist that do not require the presence of large parent bodies. ...
... of this plot correspond to ne and Te, while the curves indicate the values of Te and ne for which the intensity ratios of the lines indicated in the figure are equal to the observed line intensity ratios in the spectrum of the planetarynebula NGC7026 ...
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Ссылки http://www.astro.spbu.ru/staff/afk/Papers/2008/Kholtygin2008NeTediagnE.pdf -- 157.1 Кб -- 19.11.2010 Похожие документы
... and collisionally excited lines of C and O ions can be successfully fitted in the framework of a simple model of the planetarynebula with single values of the mean electron temperature T0 , mean electron number density n0 as well as with a single value e ...
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Ссылки http://www.astro.spbu.ru/staff/afk/Papers/1998/InhomPNe1998.pdf -- 434.1 Кб -- 19.11.2010 Похожие документы
... The values of the transition probabilities and ij for the large numb er of forbidden and intercombination lines which are observed in the sp ectra of planetarynebula are given in Table 17. ...
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Ссылки http://www.astro.spbu.ru/staff/afk/AtDatCentre/AtDatCat/Chapter3.pdf -- 114.0 Кб -- 19.11.2010 Похожие документы
... A good example of the usefulness of imaging polarimetry at NIR wavelengths is shown in Fig. 1, in which the degrees of polarisation and the polarised ux for the proto-planetarynebula IRAS 17436 + 5003 are presented [14]. ...