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Matthew Green

I am a PhD student in the Astronomy and Astrophysics group at the University of Warwick. My supervisors are Tom Marsh and Danny Steeghs. My PhD focuses on AM CVns, a class of He-dominated cataclysmic variables which include the shortest period binaries known. I am particularly interested in the first fully-eclipsing AM CVn, Gaia14aae.


AM CVn-type binaries are laboratories of extreme physics and the dominant source of gravitational waves at frequencies detectable by a space interferometer such as LISA, as well as potential sources of dwarf novae, classical novae, type 1a supernovae, and ".1a" supernovae. They consist of a central white dwarf accreting He-rich material from a donor, which may be either another white dwarf or a He-atmosphere star.

Because of their low space density only around 50 are known. In 2014 the first fully-eclipsing AM CVn was discovered, Gaia14aae, offering an unprecedented wealth of information on the structure and evolutionary history of these objects. I am studying this system using high-speed photometry and time-resolved spectroscopy.


I am a regular writer for Astrobites, who summarise astro-ph papers aimed at an undergraduate level. I also volunteer for the department's planetarium, which is used on visits to local schools.


First Author
  • "High-Speed Photometry of Gaia14aae: An Eclipsing AM CVn That Challenges Formation Models" -- MNRAS (2018), 476, 1663, -- M. J. Green, T. R. Marsh, D. T. H. Steeghs, T. Kupfer, R. P. Ashley, S. Bloemen, E. Breedt, H. C. Campbell, A. Chakpor, C. M. Copperwheat, V. S. Dhillon, G. Hallinan, L. K. Hardy, J. J. Hermes, P. Kerry, S. P. Littlefair, J. Milburn, S. G. Parsons, N. Prasert, J. van Roestel, D. I. Sahman, N. Singh
  • "A 15.7-Minute AM CVn Binary Discovered in K2" -- MNRAS (2018) -- M. J. Green, J. J. Hermes, T. R. Marsh, D. T. H. Steeghs, Keaton J. Bell, S. P. Littlefair, S. G. Parsons, E. Dennihy, J. T. Fuchs, J. S. Reding, B. C. Kaiser, R. P. Ashley, E. Breedt, V. S. Dhillon, N. P. Gentile Fusillo, P. Kerry, D. I. Sahman

Conference Talks and Posters

  • Talk: "Gaia14aae: An Eclipsing AM CVn that Challenges Formation Models" (Golden Age of Cataclysmic Variables IV, Palermo, September 2017)
  • Talk: "Gaia14aae: An Eclipsing AM CVn that Challenges Formation Models" (NAM, Hull, July 2017)
  • Poster: "An Update on Gaia14aae, the First Eclipsing AM CVn" (European White Dwarf Workshop, Warwick, June 2016). Proceedings.

Me at Teide

Write to:

Matthew Green,
Department of Physics,
University of Warwick,
Coventry CV4 7AL

Contact details:

Office: PS0.16F
E-Mail: Matthew.Green AT
Twitter: @matthu7777