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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

Jet physics and impact via LOFAR extragalactic surveys

RoleStart dateEnd dateFunding source
Lead01/Apr/201831/Mar/2020STFC Science & Technology Facilities Council
It is now well established that jets from active galactic nuclei play an important role in the evolution of massive galaxies; however, studies of jet populations and their impact at high redshifts have so far been limited to the most extreme objects. New radio surveys are about to change this, by establishing the demographics of low and intermediate luminosity jets out to the epochs where star formation and quasar activity peak, and where galaxy groups and clusters are forming. The proposed project will build on our recent, STFC-funded work to address key questions about the inter-relationship between radio observables, large-scale environment and particle content, which are crucial to exploiting LOFAR and eventually Square Kilometre Array surveys of black-hole evolution.

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.

Publications

Radio-loud AGN in the first LoTSS data release: The lifetimes and environmental impact of jet-driven sources (2019)
Hardcastle, M. J.; Williams, W. L.; Best, P. N.; Croston, J. H.; Duncan, K. J.; Röttgering, H. J. A.; Sabater, J.; Shimwell, T. M.; Tasse, C.; Callingham, J. R.; Cochrane, R. K.; de Gasperin, F.; Gürkan, G.; Jarvis, M. J.; Mahatma, V.; Miley, G. K.; Mingo, B.; Mooney, S.; Morabito, L. K.; O'Sullivan, S. P.; Prandoni, I.; Shulevski, A. and Smith, D. J. B.
Astronomy & Astrophysics ((Early Access))
LoTSS/HETDEX: Optical quasars -I. Low-frequency radio properties of optically selected quasars (2019)
Gürkan, Gülay; Hardcastle, M. J.; Best, P. N.; Morabito, L. K.; Prandoni, I.; Jarvis, M. J.; Duncan, K. J.; Calistro Rivera, G.; Callingham, J. R.; Cochrane, R. K.; Croston, J. H.; Heald, G.; Mingo, B.; Mooney, S.; Sabater, J.; Rottgering, H. J. A.; Shimwell, T. W.; Smith, D. J. B.; Tasse, C. and Williams, W. L.
Astronomy & Astrophysics ((Early Access))
The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes (2019)
Duncan, K.; Sabater, J.; Rottgering, H.; Jarvis, M.; Smith, D.J.B.; Best, P.N.; Callingham, J.R.; Cochrane, R.; Croston, J.H.; Mingo, Beatriz; Morabito, L.; Nisbet, D.; Prandoni, I.; Shimwell, T. W.; Tasse, C.; White, G. J.; Williams, W. L.; Alegre, L.; Chyży, K. T.; Gürkan, G.; Hoeft, M.; Kondapally, R.; Mechev, A. P.; Miley, G. K.; Schwarz, D. J. and van Weeren, R. J.
Astronomy & Astrophysics, 622 ((Early Access))
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)
LOFAR reveals the giant: a low-frequency radio continuum study of the outflow in the nearby FR I radio galaxy 3C 31 (2018-03)
Heesen, V.; Croston, J. H.; Morganti, R.; Hardcastle, M. J.; Stewart, A. J.; Best, P. N.; Broderick, J. W.; Brüggen, M.; Brunetti, G.; Chyży, K. T.; Harwood, J. J.; Haverkorn, M.; Hess, K. M.; Intema, H. T.; Jamrozy, M.; Kunert-Bajraszewska, M.; McKean, J. P.; Orrú, E.; Röttgering, H. J. A.; Shimwell, T. W.; Shulevski, A.; White, G. J.; Wilcots, E. M. and Williams, W. L.
Monthly Notices of the Royal Astronomical Society, 474(4) (pp. 5049-5067)
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)
LoTSS DR1: Double-double radio galaxies in the HETDEX field (2018)
Mahatma, V.H.; Hardcastle, M. J.; Williams, W. L.; Best, P.N.; Croston, J. H.; Duncan, K.; Mingo, B.; Morganti, R.; Brienza, M.; Cochrane, R. K.; Gürkan, G.; Harwood, J. J.; Jarvis, M. J.; Jamrozy, M.; Jurlin, N.; Morabito, L. K.; Röttgering, H. J. A.; Sabater, J.; Shimwell, T. W.; Smith, D. J. B.; Shulevski, A. and Tasse, C.
Astronomy & Astrophysics ((Early Access))
The LoTSS view of radio AGN in the local Universe. The most massive galaxies are always switched on (2018)
Sabater, J.; Best, P. N.; Hardcastle, M. J.; Shimwell, T. W.; Tasse, C.; Williams, W. L.; Brüggen, M.; Cochrane, R. K.; Croston, J. H.; de Gasperin, F.; Duncan, K. J.; Gürkan, G.; Mechev, A. P.; Morabito, L. K.; Prandoni, I.; Röttgering, H. J. A. and Mingo, Beatriz
Astronomy & Astrophysics ((Early Access))
The environments of radio-loud AGN from the LOFAR Two-Metre Sky Survey (LoTSS) (2018)
Croston, J.H.; Hardcastle, M.J.; Mingo, B.; Best, P.N.; Sabater, J.; Shimwell, T.M.; Williams, W.L.; Rottgering, H.J.A.; Brienza, M.; Gurkan, G.; Ineson, J.; Miley, G.K.; Morabito, L.M.; O'Sullivan, S.P. and Prandoni, I.
Astronomy & Astrophysics ((Early Access))
The LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogue (2018)
Williams, W. L.; Hardcastle, M. J.; Best, P. N.; Sabater, J.; Croston, J. H.; Duncan, K. J.; Shimwell, T. W.; Röttgering, H. J. A.; Nisbet, D.; Gürkan, G.; Alegre, L.; Cochrane, R. K.; Goyal, A.; Hale, C. L.; Jackson, N.; Jamrozy, M.; Kondapally, R.; Kunert-Bajraszewska, M.; Mahatma, V. H.; Mingo, B.; Morabito, L. K.; Prandoni, I.; Roskowinski, C.; Shulevski, A.; Smith, D. J. B.; Tasse, C.; Urquhart, S.; Webster, B.; White, G. J.; Beswick, R. J.; Callingham, J. R.; Chyży, K. T.; de Gasperin, F.; Harwood, J. J.; Hoeft, M.; Iacobelli, M.; McKean, J. P.; Mechev, A. P.; Miley, G. K.; Schwarz, D. J. and van Weeren, R. J.
Astronomy & Astrophysics ((Early Access))
The LOFAR Two-metre Sky Survey - II. First data release (2018)
Shimwell, T. W.; Tasse, C.; Hardcastle, M. J.; Mechev, A. P.; Williams, W. L.; Best, P. N.; Röttgering, H. J. A.; Callingham, J. R.; Dijkema, T. J.; de Gasperin, F.; Hoang, D. N.; Hugo, B.; Mirmont, M.; Oonk, J. B. R.; Prandoni, I.; Rafferty, D.; Sabater, J.; Smirnov, O.; van Weeren, R. J.; White, G. J.; Atemkeng, M.; Bester, L.; Bonnassieux, E.; Brüggen, M.; Brunetti, G.; Chyży, K. T.; Cochrane, R.; Conway, J. E.; Croston, J. H.; Danezi, A.; Duncan, K.; Haverkorn, M.; Heald, G. H.; Iacobelli, M.; Intema, H. T.; Jackson, N.; Jamrozy, M.; Jarvis, M. J.; Lakhoo, R.; Mevius, M.; Miley, G. K.; Morabito, L.; Morganti, R.; Nisbet, D.; Orrú, E.; Perkins, S.; Pizzo, R. F.; Schrijvers, C.; Smith, D. J. B.; Vermeulen, R.; Wise, M. W.; Alegre, L.; Bacon, D. J.; van Bemmel, I. M.; Beswick, R. J.; Bonafede, A.; Botteon, A.; Bourke, S.; Brienza, M.; Calistro Rivera, G.; Cassano, R.; Clarke, A. O.; Conselice, C. J.; Dettmar, R. J.; Drabent, A.; Dumba, C.; Emig, K. L.; Enßlin, T. A.; Ferrari, C.; Garrett, M. A.; Génova-Santos, R. T.; Goyal, A.; Gürkan, G.; Hale, C.; Harwood, J. J.; Heesen, V.; Hoeft, M.; Horellou, C.; Jackson, C.; Kokotanekov, G.; Kondapally, R.; Kunert- Bajraszewska, M.; Mahatma, V.; Mahony, E. K.; Mandal, S.; McKean, J. P.; Merloni, A.; Mingo, B.; Miskolczi, A.; Mooney, S.; Nikiel- Wroczyński, B.; O'Sullivan, S. P.; Quinn, J.; Reich, W.; Roskowiński, C.; Rowlinson, A.; Savini, F.; Saxena, A.; Schwarz, D. J.; Shulevski, A.; Sridhar, S. S.; Stacey, H. R.; Urquhart, S.; van der Wiel, M. H. D.; Varenius, E.; Webster, B. and Wilber, A.
Astronomy & Astrophysics
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)
A representative survey of the dynamics and energetics of FRII radio galaxies (2017-05-21)
Ineson, J.; Croston, J. H.; Hardcastle, M. J. and Mingo, B.
Monthly Notices of the Royal Astronomical Society, 467(2) (pp. 1586-1607)

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