He then joined the Physics Subject Group of the North-West University as a Postdoctoral Research Fellow in 2014-2015, where he was eventually appointed Senior Lecturer until 2018. Amare’s research interests lie within the general framework of theoretical cosmology, focusing on the cosmological implications and constraints of modified gravity theories such as f(R) and f(T) theories. He is actively involved in the teaching, supervision, and research of the Physics Subject Group and the Center for Space Research at NWU.

RESEARCH INTERESTS
My current research interests revolve around explaining away the dark sector (dark matter and dark energy) using alternative gravitational physics. This includes cosmological studies of modified gravity theories, dark fluid cosmological models, and interacting dark fluid mechanisms.

DISCIPLINE: Theoretical Physics

TOP 10 PUBLICATIONS

1. Abebe, A., Abdelwahab, M., De la Cruz-Dombriz, A. and Dunsby, P.K., 2012. Covariant gauge-invariant perturbations in multifluid f(R) gravity. Classical and Quantum Gravity, 29(13), p.135011.
2. Abebe, A., de la Cruz-Dombriz, A. and Dunsby, P.K., 2013. Large scale structure constraints for a class of f(R) theories of gravity. Physical review D, 88(4), p.044050.
3. Abebe, A., 2014. Anti-Newtonian cosmologies in f(R) gravity. Classical and Quantum Gravity, 31(11), p.115011.
4. Sheikhahmadi, H., Mohammadi, A., Aghamohammadi, A., Harko, T., Herrera, R., Corda, C., Abebe, A. and Saaidi, K., 2019. Constraining chameleon field driven warm inflation with Planck 2018 data. The European Physical Journal C, 79(12), pp.1-17.
5. Ntahompagaze, J., Abebe, A. and Mbonye, M., 2017. On f(R) gravity in scalar–tensor theories. International Journal of Geometric Methods in Modern Physics, 14(07), p.1750107.
6. Sahlu, S., Ntahompagaze, J., Abebe, A., de la Cruz-Dombriz, Á. and Mota, D.F., 2020. Scalar perturbations in f(T) gravity using the 1+ 3 covariant approach. The European Physical Journal C, 80(5), pp.1-19.
7. Abebe, A., Goswami, R. and Dunsby, P.K., 2011. Shear-free perturbations of f(R) gravity. Physical Review D, 84(12), p.124027.
8. Hough, R.T., Abebe, A. and Ferreira, S.E.S., 2020. Viability tests of f(R)-gravity models with Supernovae Type 1A data. The European Physical Journal C, 80(8), pp.1-15.
9. Elmardi, M., Abebe, A. and Tekola, A., 2016. Chaplygin-gas solutions of f(R) gravity. International Journal of Geometric Methods in Modern Physics, 13(10), p.1650120.
10. Sami, H., Ntahompagaze, J. and Abebe, A., 2017. Inflationary f(R) cosmologies. Universe, 3(4), p.73.

LIST OF PUBLICATIONS
https://iopscience.iop.org/article/10.1088/0264-9381/29/13/135011/meta

LINK TO PUBLICATIONS DOI/ARXIV
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.88.044050

LINK TO PUBLICATION 3: DOI/ARXIV
https://iopscience.iop.org/article/10.1088/0264-9381/31/11/115011/meta

LINK TO PUBLICATION 10: DOI/ARXIV
https://www.mdpi.com/232296

LINK TO PUBLICATION 3: DOI/ARXIV COPY 6
https://www.worldscientific.com/doi/abs/10.1142/S0219887816501206

LINK TO PUBLICATION 3: DOI/ARXIV COPY 5
https://link.springer.com/content/pdf/10.1140/epjc/s10052-020-8342-7.pdf

LINK TO PUBLICATION 3: DOI/ARXIV COPY 4
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.84.124027

LINK TO PUBLICATION 3: DOI/ARXIV COPY 3
https://link.springer.com/article/10.1140/epjc/s10052-020-7961-3

LINK TO PUBLICATION 3: DOI/ARXIV COPY 2
https://www.worldscientific.com/doi/abs/10.1142/S0219887817501079

LINK TO PUBLICATION 3: DOI/ARXIV COPY
https://link.springer.com/article/10.1140/epjc/s10052-019-7571-0

PERSONAL/DEPARTMENTAL/GROUP WEBSITE

At the same time he was elected a Fellow of the Royal Astronomical Society.

He was appointed as a lecturer at the University of the Witwatersrand, and his first appointment as full Professor was at UNISA in 1992. In 2009 he moved to Rhodes University as Professor and Head of Department of Mathematics. He retired in 2016, and is currently Emeritus Professor

He has held several visiting appointments: England: University of Cambridge, University of Southampton; Germany: Max-Planck Institute for Gravitational Physics; India: Inter-University Centre for Astronomy and Astrophysics; Turkey: Sabanci University, USA: University of Pittsburgh, Louisiana State University, California Institute of Technology.

He has served as President of the South African Gravity Society. For many years he has been on the Council of the South African Mathematical Society, serving two terms as President. Internationally, he serves on the Council of the International Society on General Relativity and Gravitation.

RESEARCH INTERESTS
He is the author or co-author of over 70 scientific publications, and 3 books. The subjects of this work range from mathematical analysis to computer programming, from quantum gravity to discoveries about the horizons of black holes, and from cosmology to the theory of travel faster than light. However, for about the last 30 years the focus of his work has been on gravitational waves, and in particular how they are calculated.

DISCIPLINE: Astronomy/Astrophysics

TOP 10 PUBLICATIONS

1. N T Bishop & P T Landsberg Equivalence Principle – 60 years of a misuse? Nature 252 459-460 (1974)
2. N T Bishop The closed trapped region and the apparent horizon of two Schwarzschild black holes Gen. Rel. Grav. 14 717-723 (1982)
3. N T Bishop Is superluminal travel a theoretical possibility? Found. Phys. 14 333-340 (1984)
4. N T Bishop Numerical relativity: combining the Cauchy and characteristic initial value problems Class. Quant. Grav. 10 333-341 (1993)
5. N T Bishop, R Gomez, L Lehner, M Maharaj & J Winicour High-powered gravitational news Phys. Rev. D 56 6298-6309 (1997)
6. N T Bishop Linearized solutions of the Einstein equations within a Bondi-Sachs framework, and implications for boundary conditions in numerical simulations, Class. Quant. Grav. 22 2393-2406 (2005)
7. C Reisswig, N T Bishop, D Pollney and B Szilagyi, Unambiguous determination of gravitational waveforms from binary black hole mergers, Phys. Rev. Lett., 103 221101 (2009)
8. H L Bester, J Larena & N T Bishop Towards the geometry of the Universe from data Mon. Not. R. astr. Soc. 453, 2364-2377 (2015)
9. N T Bishop & L Rezzolla Extraction of Gravitational Waves in Numerical Relativity Living Rev. Relativity, http://dx.doi.org/10.1007/s41114-016-0001-9 (2016)
10. NT Bishop, PJ van der Walt and M Naidoo Effect of a low density dust shell on the propagation of gravitational waves arXiv:1912.08289, Gen. Rel. Grav. 52 92 (2020)

LIST OF PUBLICATIONS

• LINK TO PUBLICATIONS DOI/ARXIV
• LINK TO PUBLICATION 3: DOI/ARXIV
• LINK TO PUBLICATION 10: DOI/ARXIV
• LINK TO PUBLICATION 3: DOI/ARXIV COPY 6
• LINK TO PUBLICATION 3: DOI/ARXIV COPY 5
• LINK TO PUBLICATION 3: DOI/ARXIV COPY 4
• LINK TO PUBLICATION 3: DOI/ARXIV COPY 3
• LINK TO PUBLICATION 3: DOI/ARXIV COPY 2
• LINK TO PUBLICATION 3: DOI/ARXIV COPY

PERSONAL/DEPARTMENTAL/GROUP WEBSITE