The Hubble Constant Tension

Degree type


Closing date

18 July 2022



Citizenship requirement


About the research project

The Hubble Constant Tension is currently one of the most discussed problems in modern cosmology [Freedman, Nature Astronomy, 1, 0121, (2017)]. The Hubble constant is a parameter that describes the rate of change of the expansion of our universe. Measurements of the Hubble constant based on local observations [Riess, et al. Astrophysical Journal, 826, 56 (2016)] are in tension with the measurements based on Cosmic Microwave Background (CMB) radiation [Planck Collaboration, Astronomy & Astrophysics, 594, A13, (2016)]. The CMB was emitted when the Universe was very young, whereas the local observations are sensitive to the late epochs of the universe. Possible solutions of this tension range for the scenarios relevant to the early universe [Poulin, et al. Physical Review Letters, 122, 221301 (2019)], or local universe [Desmond, et al. Physical Review D, 100, 043537 (2019)], or intermediate stages of the evolution [Bolejko,  Physical Review D 97, 103529 (2018)].
The Hubble Constant Tension is one of the key projects listed in the new application for the ARC Centre of Excellence OzGrav2.0.
Thus, this is an exciting time in cosmology as the Hubble constant tension has a potential to change the current cosmological paradigm and lead to the change of the Standard Cosmological Model.

Primary Supervisor

Meet Dr Krzysztof Bolejko


Applicants will be considered for a Research Training Program (RTP) scholarship or Tasmania Graduate Research Scholarship (TGRS) which, if successful, provides:

  • a living allowance stipend of $28,854 per annum (2022 rate, indexed annually) for 3.5 years
  • a relocation allowance of up to $2,000
  • a tuition fees offset covering the cost of tuition fees for up to four years (domestic applicants only)

If successful, international applicants will receive a University of Tasmania Fees Offset for up to four years.

As part of the application process you may indicate if you do not wish to be considered for scholarship funding.


Applicants should review the Higher Degree by Research minimum entry requirements.

Additional eligibility criteria specific to this project/scholarship:

  • Applicants must be able to undertake the project on-campus

Selection Criteria

The project is competitively assessed and awarded.  Selection is based on academic merit and suitability to the project as determined by the College.

Additional essential selection criteria specific to this project:

  • knowledge of cosmology, and programming

Additional desirable selection criteria specific to this project:

  • knowledge of general relativity, research publication in this area

Application process

There is a three-step application process:

  1. Select your project, and check you meet the eligibility and selection criteria;
  2. Contact the Primary Supervisor, Dr Krzysztof Bolejko to discuss your suitability and the project's requirements; and
  3. Submit an application by the closing date listed above.
    • Copy and paste the title of the project from this advertisement into your application. If you don’t correctly do this your application may be rejected.
    • As part of your application, you will be required to submit a covering letter, a CV including 2 x referees and your project research proposal.

Following the application closing date applications will be assessed within the College. Applicants should expect to receive notification of the outcome by email by the advertised outcome date.

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