Shear-free homogeneous cosmological model with heat flux

Details Shear-free homogeneous cosmological model with heat flux Shear-free homogeneous cosmological model with heat flux

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986japa....7..259m&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 7, Dec. 1986, p. 259-273.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Models, Cosmology, Heat Flux, Shear Flow, Velocity Distribution, Homogeneity, Space-Time Functions

Scientific paper

The author presents the condition of vanishing shear in a spatially homogeneous spacetime in terms of the Ricci rotation co-efficients corresponding to an orthonormal tetrad (vα, Aηα), where vα is the unit vector along the time axis and Aηα are the three independent reciprocal group vectors. It is shown that shear-free motion is possible only in case of some special Bianchi types, and these cases are studied assuming the velocity vector to be geodetic and that there may be a nonvanishing heat flux term.

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