Photoionization model of the emission of the T Tau nebula and its chemical abundances

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Astrophysics (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF01005746· OSTI ID:5929021

Golovatyi, V V; Novosyadlyi, B S

A photoionization model of the radiation of the emission nebula associated with the variable T Tau is constructed. The calculations were made with allowance for collisional ionization, two-electron recombination, and also charge-exchange reactions between the atoms H /sup O/ and He /sup O/ and heavy element ions. The diffuse L /sub c/ radiation was taken into account by an improved variant of a method developed by the authors earlier. Good agreement between the calculated emission line spectrum of the nebula and the observations is obtained. The abundances of chemical elements in the nebula have been determined: He/H approx. = 0.07, N/H = 1.4 x 10/sup -5/, O/H = 6.5 x 10/sup -5/, Ne/H = 4.2 x 10/sup -5/, S/H = 2.1 x 10/sup -5/. The L /sub c/ energy spectrum of the source exciting the emission of the nebula has been determined more precisely. The optical and geometrical thicknesses of the nebula at the frequencies of the Lyman continuum have been estimated. The mass of the nebula is found to be M less than or equal to 3 x 10/sup -4/M /sub ./ .

• Research Organization: L'vov State University, L'vov
• OSTI ID: 5929021
• Journal Information: Astrophysics (Engl. Transl.); (United States), Journal Name: Astrophysics (Engl. Transl.); (United States) Vol. 21:2; ISSN ATPYA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
ATOM COLLISIONS
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
CHEMICAL COMPOSITION
COLLISIONS
ELEMENTS
EMISSION SPECTRA
FLUIDS
GASES
HELIUM
HELIUM IONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
LYMAN LINES
MATHEMATICAL MODELS
NEBULAE
NEON
NONMETALS
OXYGEN
PHOTOIONIZATION
PLANETARY ATMOSPHERES
PLANETARY NEBULAE
RARE GASES
RECOMBINATION
SPECTRA
SULFUR