I'm a cosmologist who works on understanding the role of gravity in our universe. In particular, I develop tools to test ideas about modified gravity and dark energy models with gravitational waves, large-scale structure and cosmological voids.
I completed my PhD at the University of Oxford, on devising mathematical frameworks for testing alternatives to General Relativity. I remained in Oxford for a five-year postdoctoral research fellowship at All Souls College, one year of which I spent as Fulbright Visiting Scholar at the University of Pennsylvania. In January 2019 I moved to QMUL to join the Cosmology & Relativity group as a Royal Society University Research Fellow and proleptic senior lecturer.
You can check out my personal website via the link above.
Semester A 2020: Module Associate for SPA6311 Physical Cosmology.
In the past I've lectured in fourth-year courses on weak lensing and introductory cosmology for the MMathPhys degree at Oxford.
In 2020 I gave a lecture series `Cosmology Beyond General Relativity' at the SIGRAV Internationl PhD school, details can be found here.
My primary research interests at present are:
- Multimessenger gravitational wave events.
- Systems for describing cosmologically-motivated alternatives to GR ('parameterisations').
- Testing gravity with galaxy surveys (large-scale structure and weak lensing).
- Cosmological voids as unique laboratories in the universe.
Examples of research funding:
I'm currently supported by two awards from the Royal Society, one of the UK's most long-standing independent scientific bodies:
Royal Society University Research Fellowship, 2019 - 2023.
Royal Society Research Fellow's Enhancement Award, 2019 - 2021.
From Feburary 2021, I will commence a Starting Grant from the European Research Council, under the Horizon2020 framework.
Some selected publications:
T. Baker and I. Harrison, ‘Constraining Scalar-Tensor Modified Gravity with Gravitational Waves and Large Scale Structure Surveys' (2020), https://arxiv.org/abs/2007.13791, submitted to JCAP.
A. Pisani, E. Massara, D. Spergel, D. Alonso, T. Baker et al., ‘Cosmic voids: a novel probe to shed light on our Universe’ (2019), https://arxiv.org/abs/1903.05161.
T. Baker, J. Clampitt, B. Jain, & M. Trodden, ‘Void Lensing as a Test of Gravity’, Phys. Rev. D 98, 023511 (2018), https://arxiv.org/abs/1803.07533.
M. Lagos, E. Bellini, J. Noller, P.G. Ferreira, T. Baker, ‘A general theory of linear cosmological perturbations: sta- bility conditions, the quasistatic limit and dynamics’, JCAP 03 (2018) 021, https://arxiv.org/abs/1711.09893.
T. Baker, E. Bellini, P. Ferreira, M. Lagos, J. Noller & I. Sawicki, ‘Strong constraints on cosmological gravity from GW170817 and GRB 170817A’, Phys. Rev. Lett. 119, 251301 (2017). Selected as a PRL Editor’s Highlight contribution. https://arxiv.org/abs/1710.06394
T. Baker, M. Trodden, ‘Multi-Messenger Time Delays from Lensed Gravitational Waves’, Phys. Rev. D., Vol. 95 063512 (2017), https://arxiv.org/abs/1612.02004.
M. Lagos, T. Baker, P.G. Ferreira, J. Noller, ‘A General Theory of Linear Cosmological Perturbations: scalar- tensor and vector-tensor theories’, Journal of Cosmology and Astroparticle Physics, Issue 08, article id. 007 (2016),https://arxiv.org/abs/1604.01396.
T. Baker, P. Bull, ‘Observational signatures of modified gravity on ultra-large scales’, The Astrophysical Journal, Vol. 811 No. 2 (2015), http://arxiv.org/abs/1506.00641
T. Baker, D. Psaltis, C. Skordis, ‘Linking Tests of Gravity On All Scales: from the Strong-Field Regime to Cosmology’, The Astrophysical Journal, 802 63 (2015), http://arxiv.org/abs/1412.3455
T. Baker, P.G. Ferreira, C. Skordis, ‘The Parameterized Post-Friedmann Framework for Theories of Modified Gravity: Concepts, Formalism and Examples’, Phys. Rev. D, Vol.87, 024015 (2013), http://arxiv.org/abs/1209.2117
T. Baker, P.G. Ferreira, C. Skordis, J. Zuntz, ‘Towards a Fully Consistent Parameterization of Modified Gravity’, Phys. Rev. D, Vol. 84, Issue 12 (2011), http://arxiv.org/abs/1107.0491
- Baker T, Calcagni G, Chen A et al. (2022), Measuring the propagation speed of gravitational waves with LISA $nameOfConference
- Baker J, Baker T, Carbone C et al. (2021), High angular resolution gravitational wave astronomy $nameOfConference
- Baker T, Barreira A, Desmond H et al. (2021), The Novel Probes Project -- Tests of Gravity on Astrophysical Scales $nameOfConference
- Baker T, Harrison I (2021), Constraining Scalar-Tensor Modified Gravity with Gravitational Waves and Large Scale Structure Surveys $nameOfConference
- Sedda MA, Berry CPL, Jani K et al. (2020), The missing link in gravitational-wave astronomy: discoveries waiting in the decihertz range $nameOfConference
- Barausse E, Berti E, Hertog T et al. (2020), Prospects for fundamental physics with LISA $nameOfConference
- Baker J, Baker T, Carbone C et al. (2019), High angular resolution gravitational wave astronomy $nameOfConference
- Baker T, Barreira A, Desmond H et al. (2019), The Novel Probes Project -- Tests of Gravity on Astrophysical Scales $nameOfConference
- Baker T, Clampitt J, Jain B et al. (2018), Void lensing as a test of gravity $nameOfConference
- Lagos M, Bellini E, Noller J et al. (2018), A general theory of linear cosmological perturbations: stability conditions, the quasistatic limit and dynamics $nameOfConference
- Amendola L, Appleby S, Avgoustidis A et al. (2018), Cosmology and fundamental physics with the Euclid satellite. $nameOfConference
- Baker T, Bellini E, Ferreira PG et al. (2017), Strong Constraints on Cosmological Gravity from GW170817 and GRB 170817A $nameOfConference
- Baker T, Trodden M (2017), Multimessenger time delays from lensed gravitational waves $nameOfConference
- Lagos M, Baker T, Ferreira PG et al. (2016), A general theory of linear cosmological perturbations: scalar-tensor and vector-tensor theories $nameOfConference
- Bull P, others (2016), Beyond ΛCDM: Problems, solutions, and the road ahead $nameOfConference
- Berti E, Barausse E, Cardoso V et al. (2015), Testing general relativity with present and future astrophysical observations $nameOfConference
- Baker T, Bull P (2015), Observational signatures of modified gravity on ultra-large scales $nameOfConference
- Leonard CD, Baker T, Ferreira PG (2015), Exploring degeneracies in modified gravity with weak lensing $nameOfConference
- Baker T, Psaltis D, Skordis C (2015), LINKING TESTS OF GRAVITY ON ALL SCALES: FROM THE STRONG-FIELD REGIME TO COSMOLOGY $nameOfConference
- Baker T, Ferreira PG, Leonard CD et al. (2014), New gravitational scales in cosmological surveys $nameOfConference
- Ferreira PG, Baker T, Skordis C (2014), Testing general relativity with cosmology: a synopsis of the parametrized post-Friedmann approach $nameOfConference
- Baker T, Ferreira P, Skordis C (2014), A fast route to modified gravitational growth $nameOfConference
- Baker T, Ferreira PG, Skordis C (2013), The parameterized post-Friedmann framework for theories of modified gravity: Concepts, formalism, and examples $nameOfConference
- Amendola L, Appleby S, Bacon D et al. (2013), Cosmology and Fundamental Physics with the Euclid Satellite. $nameOfConferenceDOI: 10.12942/lrr-2013-6
- Zuntz J, Baker T, Ferreira PG et al. (2012), Ambiguous tests of general relativity on cosmological scales $nameOfConference
- Baker T (2012), Growth of perturbations in parametrized gravity for an Einstein–de Sitter universe $nameOfConference
- Baker T, Ferreira PG, Skordis C et al. (2011), Towards a fully consistent parametrization of modified gravity $nameOfConference
Current PhD students:
Ashim Sen Gupta
Winner of the ‘Women of the Future Award’, science category, 2015.
Fulbright All-Disciplines Scholar Award, 2015-2016.
SET for Britain Cavendish medal for Physics, 2014.