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Can the first stars formed be pre-galactic?

Published online by Cambridge University Press:  07 August 2017

J. C. N. de Araujo  and
R. Opher
J. C. N. de Araujo
Affiliation:
Instituto Astronômico e Geofísico - U.S.P. C.P. 9638, 01065 SÃo Paulo, S.P. - Brasil
R. Opher
Affiliation:
Instituto Astronômico e Geofísico - U.S.P. C.P. 9638, 01065 SÃo Paulo, S.P. - Brasil

Abstract

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We show that in a scenario of isothermal density perturbations, stars ≥50M (Population III) at a redshift z ≫ zgal (redshift of galaxy formation) can be formed. We take into account in the calculation the expansion of the Universe and a series of physical processes relevant to the primordial plasma: photon-drag, photon-cooling, recombination, collisional ionization, photoionization, Lyman-α cooling and molecular hydrogen cooling.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 388
Copyright
Copyright © Kluwer 

References

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