Browsing by Author "Katugampala, K. D. W. J."

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Black holes as boson stars.

Katugampala, K. D. W. J.; De Silva, L. N. K. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)

Kaup (1968) had shown that spin zero bosons could form stable stars. However, there had been no interest in these stars until the Higgs boson was discovered in 2012. Now there is renewed interest in boson stars. Clark ...
A new cosmological model including inflation, deceleration, acceleration and deceleration again.

Perera, P. V. N. M. C.; Katugampala, K. D. W. J. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)

Since Perlmutter and Riess (1997; 1998) observed that the Universe expands with an acceleration, many models involving dark energy have been proposed to explain this phenomenon. A family of cosmological models with both ...
Some properties of expanding universe with variable lambda ()

Karunathilaka, E. L. N. L.; Katugampala, K. D. W. J. (Faculty of Science, University of Kelaniya, Sri Lanka, 2021)

When the Universe is expanding, some of its properties radius, density, volume and total mass would be changed with cosmic time. Those changes can be obtained by using experimental data or solving suitable mathematical ...

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