The University of Southampton

Dr Matthew Middleton

Dr Matt Middleton was awarded his PhD in astronomy (with a focus on the connection between AGN and black hole binaries) from the University of Durham in 2010. Since then he has been a PDRA at Durham, a Marie-Curie Fellow at the University of Amsterdam (2012-2014) and STFC Ernest Rutherford Fellow at Cambridge and now at Southampton where he also holds the position of lecturer.

His interests focus on the nature of accretion onto compact objects as revealed via the coupling of the time and energy domains (spectral-timing) and specifically the changes in the accretion flow when it reaches and exceeds the classical Eddington limit. He employs a combination of analytical theory and observations across multiple bands but predominantly the X-rays. He is external collaborator for e-ROSITA and head of SMARTnet – a network for performing observations of transients (including binaries, AGN, TDEs etc.) simultaneously in multiple wavebands.

Within the University he teaches PHYS1005-Introduction to Astronomy.


Ingram, Adam, van der klis, Michiel, Middleton, Matthew, Altamirano, Diego and Uttley, Phil (2016) Tomographic reflection modelling of quasi-periodic oscillations in the black hole binary H 1743–322. Monthly Notices of the Royal Astronomical Society, 1-13. (In Press)

Ingram, Adam, van der Klis, Michiel, Middleton, Matthew, Done, Chris, Altamirano, Diego, Heil, Lucy, Uttley, Phil and Axelsson, Magnus (2016) A quasi-periodic modulation of the iron line centroid energy in the black hole binary H1743-322. Monthly Notices of the Royal Astronomical Society, 461 (2), 1967-1980. (doi:10.1093/mnras/stw1245).

Pinto, Ciro, Middleton, Matthew and Fabian, A.C. (2016) Resolved atomic lines reveal outflows in two ultraluminous X-ray sources. Nature, 533 (7601), 64-67. (doi:10.1038/nature17417).

Pinto, C., Fabian, A., Middleton, M. and Walton, D. (2017) Ultrafast outflows in ultraluminous X-ray sources. Astronomische Nachrichten, 338 (2-3), 234-240. (doi:10.1002/asna.201713336).

Furst, F., Walton, D.J., Harrison, F.A., Stern, D., Barret, D., Brightman, M., Fabian, A.C., Grefenstette, B., Madsen, K.K., Middleton, M.J., Miller, J.M., Pottschmidt, K., Ptak, A., Rana, V. and Webb, N. (2016) Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13. The Astrophysical Journal Letters, 831 (2). (doi:10.3847/2041-8205/831/2/L14).

Walton, D.J., Fürst, F., Harrison, F.A. and Middleton, Matthew (2017) The broadband spectral variability of Holmberg IX X-1. The Astrophysical Journal. (doi:10.3847/1538-4357/aa683e).

Sutton, Andrew D., Swartz, Douglas A., Roberts, Timothy P., Middleton, Matthew J., Soria, Roberto and Done, Chris (2017) Crossing the Eddington Limit: examining disk spectra at high accretion rates. The Astrophysical Journal, 836 (1). (doi:10.3847/1538-4357/836/1/48).

Dauser, T., Middleton, M. and Wilms, J. (2017) Modeling the light curves of ultraluminous X-ray sources as precession. Monthly Notices of the Royal Astronomical Society, 466 (2), 2236-2241. (doi:10.1093/mnras/stw3304).

Pinto, C., Alston, W., Soria, R., Middleton, M.J., Walton, D.J., Sutton, A.D., Fabian, A.C., Earnshaw, H., Urquhart, R., Kara, E. and Roberts, T.P. (2017) From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link. Monthly Notices of the Royal Astronomical Society, 468 (3), 2865-2883.

Middleton, Matthew, Heil, Lucy, Pintore, Fabio, Walton, Dominic J. and Roberts, Timothy P. (2015) A spectral-timing model for ULXs in the supercritical regime. Monthly Notices of the Royal Astronomical Society, 447 (4), 3243-3263. (doi:10.1093/mnras/stu2644).

Parker, Michael L., Pinto, Ciro, Uttley, Philip and Middleton, Matthew (2017) The response of relativistic outflowing gas to the inner accretion disk of a black hole. Nature, 543 (7643), 83-86. (doi:10.1038/nature21385).

Walton, D.J., Mooley, K., King, A.L., Tomsick, J.A., Miller, J.M., Dauser, T., García, J.A., Bachetti, M., Brightman, M., Fabian, A.C., Forster, K., Fürst, F., Gandhi, P., Grefenstette, B.W., Harrison, F.A., Madsen, K.K., Meier, D.L., Middleton, M.J., Natalucci, L., Rahoui, F., Rana, V. and Stern, D. (2017) Living on a flare: Relativistic reflection in V404 Cyg observed by NuSTAR during Its summer 2015 outburst. The Astrophysical Journal, 839 (2). (doi:10.3847/1538-4357/aa67e8).

Middleton, M.J., Casella, P., Gandhi, P., Bozzo, E., Anderson, G., Degenaar, N., Donnarumma, I., Israel, G., Knigge, C., Lohfink, A., Markoff, S., Marsh, T., Rea, N., Tingay, S., Wiersema, K., Altamirano, D., Bhattacharya, D., Brandt, W.N., Carey, S., Charles, P., Trigo, M. Diaz, Done, C., Kotze, M., Eikenberry, S., Fender, R., Ferruit, P., Fuerst, F., Greiner, J., Ingram, A., Heil, L., Jonker, P., Komossa, S., Leibundgut, B., Maccarone, T., Malzac, J., McBride, V., Miller-Jones, J., Page, M., Rossi, E.M., Russell, D.M., Shahbaz, T., Sivakoff, G.R., Tanaka, M., Thompson, D.J., Uemura, M., Uttley, P., Moorsel, G. van, Doesburgh, M. Van, Warner, B., Wilkes, B., Wilms, J. and Woudt, P. (2017) Paving the way to simultaneous multi-wavelength astronomy. New Astronomy Reviews. (doi:10.1016/j.newar.2017.07.002).

Middleton, Matthew and King, Andrew (2017) Predicting ultraluminous X-ray source demographics from geometrical beaming. Monthly Notices of the Royal Astronomical Society, 470 (1), l69-l71. (doi:10.1093/mnrasl/slx079).

Middleton, M.J., Fragile, P.C., Bachetti, M., Brightman, M., Jiang, Y-F, Ho, W.C.G., Roberts, T.P., Ingram, A.R., Dauser, T., Pinto, C., Walton, D.J., Fuerst, F., Fabian, A.C. and Gehrels, N. (2018) Lense-Thirring precession in ULXs as a possible means to constrain the neutron star equation of state. Monthly Notices of the Royal Astronomical Society, 475 (1), 154-166. (doi:10.1093/mnras/stx2986).

Middleton, Matthew, Walton, Dominic J., Roberts, Timothy P. and Lucy, Heil (2013) Broad absorption features in wind-dominated ultraluminous X-ray sources? Monthly Notices of the Royal Astronomical Society: Letters, L51-L53. (doi:10.1093/mnrasl/slt157).

buisson, D.J.K., Lohfink, A., Alston, W.N., Cackett, E.M., Chiang, C-Y, Dauser, T., De Marco, B, Fabian, A.C., Gallo, L.C., Garcia, J.A, jiang, J., Kara, E. and Middleton, Matthew (2017) Is there a UV/X-ray connection in IRAS 13224–3809? Monthly Notices of the Royal Astronomical Society. (In Press)

Cardoso, Vitor, Hartnett, Gavin S., Middleton, Matthew, Pani, Paolo, Santos, Jorge E. and Campos Dias, Oscar (2018) Constraining the mass of dark photons and axion-like particles through black-hole superradiance. Journal of Cosmology and Astroparticle Physics, 2018 (03), 043-043. (doi:10.1088/1475-7516/2018/03/043).

Walton, D.J., Bachetti, M., Fürst, F., Barret, D., Brightman, M., Fabian, A.C., Grefenstette, B.W., Harrison, F.A., Heida, M., Kennea, J.A., Lau, R.M., Madsen, K.K., Middleton, M.J., Pinto, C., Steinert, J. and Webb, N. (2018) A potential cyclotron resonant scattering feature in the ultraluminous x-ray source pulsar NGC 300 ULX1 seen by NuSTAR and XMM-Newton. The Astrophysical Journal Letters, 857 (1). (doi:10.3847/2041-8213/aabadc).

Walton, D.J., Fürst, F., Heida, M., Harrison, F.A., Barret, D., Stern, D., Bachetti, M., Brightman, M., Fabian, A.C. and Middleton, M.J. (2018) Evidence for pulsar-like emission components in the broadband ULX sample. The Astrophysical Journal, 856 (2). (doi:10.3847/1538-4357/aab610).

Brightman, M., Harrison, F.A., Fürst, F., Middleton, M.J., Walton, D.J., Stern, D., Fabian, A.C., Heida, M., Barret, D. and Bachetti, M. (2018) Magnetic field strength of a neutron-star-powered ultraluminous X-ray source. Nature Astronomy, 2 (4), 312-316. (doi:10.1038/s41550-018-0391-6).

Walton, D.J., Fürst, F., Harrison, F.A., Stern, D., Bachetti, M., Barret, D., Brightman, M., Fabian, A.C., Middleton, M.J., Ptak, A. and Tao, L. (2018) Super-Eddington accretion on to the neutron star NGC7793 P13: broad-band X-ray spectroscopy and ultraluminous X-ray sources. Monthly Notices of the Royal Astronomical Society, 473 (4), 4360-4376. (doi:10.1093/mnras/stx2650).

Fürst, Felix, Walton, D.J., Heida, M., Barret, D., Brightman, M., Fabian, A.C. and Middleton, Matthew (2018) A tale of two periods: determination of the orbital ephemeris of the super-Eddington pulsar NGC7793 P13. Astronomy & Astrophysics, 616, 1-10. (doi:10.1051/0004-6361/201833292).

Alston, W.N., Fabian, A.C., Buisson, D.J.K., Kara, E., Parker, M.L., Lohfink, A.M., Uttley, P., Wilkins, D.R., Pinto, C., De Marco, B., Cackett, E.M., Middleton, M.J., Walton, D.J., Reynolds, C.S., Jiang, J., Gallo, L.C., Zogbhi, A., Miniutti, G., Dovciak, M. and Young, A.J. (2019) The remarkable X-ray variability of IRAS 13224–3809 – I. The variability process. Monthly Notices of the Royal Astronomical Society, 482 (2), 2088-2106. (doi:10.1093/mnras/sty2527).

Earnshaw, H. P., Roberts, T. P., Middleton, M. J., Walton, D. J. and Mateos, S. (2019) A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies. Monthly Notices of the Royal Astronomical Society, 483 (4), 5554-5573. (doi:10.1093/mnras/sty3403).

Mushtukov, Alexander A., Ingram, Adam, Middleton, Matthew, Nagirner, Dmitrij I. and van der Klis, Michael (2019) Timing properties of ULX pulsars: optically thick envelopes and outflows. Monthly Notice of the Royal Astronomical Society, 484 (1). (doi:10.1093/mnras/sty3525).


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