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Cosmology at Queen Mary University of London
Karim A. Malik
Astronomy UnitSchool of Physics and AstronomyQueen Mary, University of London
London Cosmology Discussion Meeting27/10/2016
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 1 / 8
The Cosmology Group at QMUL
The Cosmology and Relativity Group has two parts
in School of Physics and Astronomy – Astronomy Unit
in School of Mathematical Sciences – Applied Mathematics
for historical reasons: until 2011 Astronomy Unit was in SMS
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 2 / 8
Cosmology at QMUL People
Meet the group
Full time staff:
I In the AU:F Chris ClarksonF Tim CliftonF Karim MalikF David MulryneF Alexander PolnarevF Will Sutherland
I In Maths:F Shabnam BeheshtiF Pau FiguerasF Vasilis Paschalidis (starting 2017)F Arick ShaoF Juan A. Valiente KroonF Christian Luebbe (in SBCS)
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 3 / 8
Cosmology at QMUL People
Meet the group continued . . .
Postdocs:
I Prina PatelI Tommi TenkanenI Hans Bantilan (in the School of Mathematical Sciences)
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 4 / 8
Cosmology at QMUL People
Meet the group continued . . .
PhD students in Maths:
I Biel CardonaI Diego CarranzaI Michael ColeI Edgar GasperinI Adem HursitI Zoltan LaczkoI Jarrod Williams
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 5 / 8
Cosmology at QMUL People
Meet the group continued . . .
PhD students:
I Viraj Sanghai (with Clifton)I Sophia Goldberg (with Clifton and Malik)I Zac Kenton (with Mulryne and Thomas in Strings)I Shaillee Imrith (with Mulryne)I Charalambos (Charlie) Pittordis (with Sutherland)I Jessie Durk (with Clifton)I Pedro Carrilho (with Malik)I John Ronayne (with Mulryne and Malik)I Louis Coates (with Clarkson)I Christopher (Kit) Gallagher (with Clifton)I Jorge Fuentes (with Malik)
Emeritus, nearly emeritus, and visiting professors:Bernard Carr, Alan Coley, George Ellis, Carlos Hidalgo, Malcolm MacCallum,David Matravers, Reza Tavakol.
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 6 / 8
Cosmology at QMUL Areas of research
Areas of research
The physics of the early Universe and models of inflation
Cosmic Microwave Background anisotropies
Primordial Black Holes
Large Scale Structure formation
Large Scale Structure surveys
Dark energy and modified gravity
Inhomogeneous models of the universe
Cosmological perturbation theory at linear order and beyond
Theme: At the moment mostly theory – calculating observable effects, makingtheoretical predictions, comparing theory with observations.
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 7 / 8
Cosmology at QMUL Areas of research
Cosmological perturbation theory
Example of recent work:
I Higher order theoryI Two-parameter expansion
(combining post-newtonianand standard perturbationtheory)
I Here: modelling the density
Goldberg, Clifton, and M. (2016)
What else?
I primordial magnetic field generationI initial conditions for N-body simulationsI contributions of vector and tensor perturbations to ζ2I . . .
Karim A. Malik (QMUL) Cosmology at QMUL RAS 27.10.2016 8 / 8
Timothy CliftonQUEEN MARY UNIVERSITY OF LONDON
Research interests:
• Exact solutions of Einstein’s equations• Relativistic methods and techniques• Alternative theories of gravity
Applications:
• Testing and constraining gravity in cosmology• Investigating candidate dark energy theories• The cosmological back-reaction problem
Mathematical and relativistic techniques in cosmology & gravitation
Current and past research students: Phil Bull, Viraj Sanghai, Sophia Goldberg, Jessie Durk & Kit Gallagher.
My academic world-line:
PyTransport
Visit transportmethod.com to find out more
David Mulryne • Royal Society URF at QMUL.
• Research focused on early universe cosmology: inflation, reheating, and the production and evolution of perturbations in these phases — applying analytic and numerical techniques.
• Recent highlight has been the development of a Python module written in C++ and Python that calculates the power spectrum and bispectrum from multi-field models of inflation including all tree level effects.
Chris Clarkson QMUL relativistic
effects in cosmology
gravitational lensing
Doppler magnification — SKA predictions
Tommi Tenkanen
Particle Physics & Cosmology(Inflation, Reheating, Dark matter,
Cosmological perturbations, Phase transitions)
Postdoc, QMUL, Oct 2016-(D. Mulryne, K. Malik)
PhD, U. Helsinki, 2014-16(K. Enqvist, S. Nurmi, etc.)
T. Tenkanen, LCDM, 27.10.2016
'A Strong Electroweak Phase Transition from the Infaton Field', Tenkanen,Tuominen, Vaskonen, arXiv:1606.06063
'Feebly Interacting Dark Matter Particle asthe Infaton', Tenkanen, arXiv:1607.01379
'Infationary Imprints on Dark Matter',Nurmi, Tenkanen, Tuominen,arXiv:1506.04048
'Isocurvature Constraints on Portal Couplings',Kainulainen, Nurmi, Tenkanen, Tuominen, Vaskonen,arXiv:1601.07733
'Standard Model with a real singlet scalarand infation', Enqvist, Nurmi, Tenkanen,Tuominen, arXiv:1407.0659
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T. Tenkanen, LCDM, 27.10.2016
Inflation: Connecting Theory with ObservablesZac Kenton, 4th year PhD in Strings/Cosmo at QMUL, Supervisors: Prof SteveThomas, Dr David Mulryne
I Non-Gaussianity in Multifield models of inflation.I Squeezed limit of the bispectrum in multifield inflation:
~k1
~k2
~k3
= NAΣAB(k1)∂BPζ(k3).
Also worked on:I Other soft limits of higher-point correlation functionsI String theory models of inflationI CMB Power AsymmetryI Strong coupling scales during inflation
Queen Mary University of London (QMUL)
Viraj A. A. Sanghai, Timothy Clifton
1 Post-Newtonian cosmological modelling
Phys. Rev. D 91, 103532 (2015), Erratum: Phys. Rev. D 93, 089903(2016), Arxiv: 1503.08747 [gr-qc]
2 Cosmological backreaction in the presence of radiationand a cosmological constant
Phys. Rev. D 94, 023505 (2016), Arxiv: 1604.06345 [gr-qc]
3 Parameterized post-Newtonian cosmology
Arxiv: 1610.08039 [gr-qc]
Viraj A A Sanghai (QMUL) 1 / 1
Jessie DurkSupervisor: Dr. Timothy Clifton
Inhomogeneous cosmological models
Inhomogeneities → large scale expansion → observables.
∙ Exact Initial Data for Black HoleUniverses with a CosmologicalConstant - arXiv:1610.05635
∙ Eternal expansion if ΩΛ > 427Ωm.
∙ Clusters of masses & backreaction.
LCDM 27th Oct 2016