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Dr Judith Helen Croston

Profile summary

  • Central Academic Staff
  • Lecturer in Physical Sciences
  • Faculty of Science, Technology, Engineering & Mathematics
  • School of Physical Sciences
  • judith.croston

Professional biography

I am currently a Lecturer in Physical Sciences. I was formerly a Principal Research Fellow at the University of Southampton (2015-2017), Academic Director for Physical Sciences at the University of Cambridge Institute of Continuing Education (2014-2016), and Lecturer in Physics at the University of Southampton (2009-2015). I was a Research Fellow at the University of Hertfordshire (2005-2009), Associate Lecturer (part-time) with the Open University (2006-2008) and Postdoctoral researcher at the Service d'Astrophysique, Commission d'Energie Atomique (Saclay) (2004-2005).

I obtained my PhD, on the topic of jet/environment interactions of radio-loud active galaxies, from the University of Bristol in 2004, and my MSci (Physics with Astrophysics) also from the University of Bristol in 2001. 

Research interests

My research interests include the physics of extragalactic jets, the physics of galaxy groups and clusters, high-energy astrophysics, the evolution of galaxy groups and large-scale structure, and next-generation X-ray and radio facilities, including LOFAR, SKA and Athena. I'm an active member of the LOFAR Extragalactic Surveys KSP, and a Topical Panel chair for the ESA Athena next-generation X-ray observatory. 

Teaching interests

I have taught a variety of courses in physics and astronomy at undergraduate and postgraduate level, including core physics, stellar evolution, galaxies, high-energy astrophysics and cosmology. 

I am currently part of the module team for S282 Astronomy, SXPA288 Practical Science: Physics and Astronomy, S382 Astrophysics, and S383 The Relativistic Universe. I am also a Postgraduate Research Tutor for the School of Physical Sciences.

Research Activity

Externally funded projects

Exploring jet populations with LOFAR surveys

RoleStart dateEnd dateFunding source
Lead01/Jul/201730/Sep/2017Royal Astronomical Society (RAS)
Royal Astronomical Society Undergraduate Research Bursary

Jet energy injection in galaxy groups and clusters - transfer of CG funding (Transfer in)

RoleStart dateEnd dateFunding source
Lead01/May/201731/Mar/2019STFC Science & Technology Facilities Council
This grant funds a postdoctoral research associate to investigate the physics and energetic impact of radio-loud active galaxies, using new datasets from the Low-Frequency Array (LOFAR) together with other multi-wavelength observations. Jet energy injection is a crucial process in the evolution of galaxies and galaxy clusters, and this project aims to improve our understanding of the role of jets in the Universe.


The X-ray Ribs Within the Cocoon Shock of Cygnus A (2018-06)
Duffy, R T; Worrall, D M; Birkinshaw, M; Nulsen, P E J; Wise, M W; de Vries, M N; Snios, B; Mathews, W G; Perley, R A; Hardcastle, M J; Rafferty, D A; McNamara, B R; Edge, A C; McKean, J P; Carilli, C L; Croston, J H; Godfrey, L E H and Laing, R A
Monthly Notices of the Royal Astronomical Society, 476(4) (pp. 4848-4860)
Particle content, radio-galaxy morphology and jet power: all radio-loud AGN are not equal (2018-05-11)
Croston, J.H.; Ineson, J. and Hardcastle, M.J.
Monthly Notices of the Royal Astronomical Society, 476(2) (pp. 1614-1623)
Remnant radio-loud AGN in the Herschel-ATLAS field (2018-04-21)
Mahatma, V. H.; Hardcastle, M. J.; Williams, W. L.; Brienza, M.; Brüggen, M.; Croston, J. H.; Gurkan, G.; Harwood, J. J.; Kunert-Bajraszewska, M.; Morganti, R.; Röttgering, H. J. A.; Shimwell, T. W. and Tasse, C.
Monthly Notices of the Royal Astronomical Society, 475(4) (pp. 4557-4578)
Deep VLA Observations of the Cluster 1RXS J0603.3+4214 in the Frequency Range of 1–2 GHz (2018-01-10)
Rajpurohit, K.; Hoeft, M.; van Weeren, R. J.; Rudnick, L.; Röttgering, H. J. A.; Forman, W. R.; Brüggen, M.; Croston, J. H.; Andrade-Santos, F.; Dawson, W. A.; Intema, H. T.; Kraft, R. P.; Jones, C. and Jee, M. James
The Astrophysical Journal, 852, Article 65(2)
The Cocoon Shocks of Cygnus A: Pressures and Their Implications for the Jets and Lobes (2018)
Snios, Bradford; Nulsen, Paul E. J.; Wise, Michael W.; de Vries, Martijn; Birkinshaw, Mark; Worrall, Diana M.; Duffy, Ryan T.; Kraft, Ralph P.; McNamara, Brian R.; Carilli, Chris; Croston, Judith H.; Edge, Alastair C.; Godfrey, Leith E. H.; Hardcastle, Martin J.; Harris, Daniel E.; Laing, Robert A.; Mathews, William G.; McKean, John P.; Perley, Richard A.; Rafferty, David A. and Young, Andrew J.
The Astrophysical Journal, 855, Article 71(1)
An X-ray survey of the 2Jy sample. II: X-ray emission from extended structures (2017-09-21)
Mingo, Beatriz; Hardcastle, M. J.; Ineson, J.; Mahatma, V.; Croston, J. H.; Dicken, D.; Evans, D. A.; Morganti, R. and Tadhunter, C.
Monthly Notices of the Royal Astronomical Society, 470(3) (pp. 2762-2779)
A new method for finding and characterizing galaxy groups via low-frequency radio surveys (2017-09-11)
Croston, J.H.; Ineson, J.; Hardcastle, M. J. and Mingo, B.
Monthly Notices of the Royal Astronomical Society, 470(2) (pp. 1943-1949)
FR II radio galaxies at low frequencies – II. Spectral ageing and source dynamics (2017-07)
Harwood, Jeremy J.; Hardcastle, Martin J.; Morganti, Raffaella; Croston, Judith H.; Brüggen, Marcus; Brunetti, Gianfranco; Röttgering, Huub J. A.; Shulevski, Aleksander and White, Glenn J.
Monthly Notices of the Royal Astronomical Society, 469(1) (pp. 639-655)