Skip to main content
Home
Department Of Physics text logo
  • Research
    • Our research
    • Our research groups
    • Our research in action
    • Research funding support
    • Summer internships for undergraduates
  • Study
    • Undergraduates
    • Postgraduates
  • Engage
    • For alumni
    • For business
    • For schools
    • For the public
Menu
Theoretical physicists working at a blackboard collaboration pod in the Beecroft building.
Credit: Jack Hobhouse

John March-Russell

Professor of Theoretical Physics and Senior Research Fellow, New College, Oxford; Perimeter Institute Distinguished Visiting Research Chair

Research theme

  • Particle astrophysics & cosmology
  • Fundamental particles and interactions
  • Fields, strings, and quantum dynamics

Sub department

  • Rudolf Peierls Centre for Theoretical Physics

Research groups

  • Particle theory
  • AION/Magis
John.March-Russell@physics.ox.ac.uk
Telephone: 01865 (2)73630
Rudolf Peierls Centre for Theoretical Physics, room 60.05
  • About
  • Publications

Dark photon stars: formation and role as dark matter substructure

Journal of Cosmology and Astroparticle Physics IOP Publishing 2022:08 (2022) 18

Authors:

Marco Gorghetto, Edward Hardy, John March-Russell, Ningqiang Song, Stephen M West

Abstract:

Any new vector boson with non-zero mass (a 'dark photon' or 'Proca boson') that is present during inflation is automatically produced at this time from vacuum fluctuations and can comprise all or a substantial fraction of the observed dark matter density, as shown by Graham, Mardon, and Rajendran. We demonstrate, utilising both analytic and numerical studies, that such a scenario implies an extremely rich dark matter substructure arising purely from the interplay of gravitational interactions and quantum effects. Due to a remarkable parametric coincidence between the size of the primordial density perturbations and the scale at which quantum pressure is relevant, a substantial fraction of the dark matter inevitably collapses into gravitationally bound solitons, which are fully quantum coherent objects. The central densities of these 'dark photon star', or 'Proca star', solitons are typically a factor 106 larger than the local background dark matter density, and they have characteristic masses of 10-16M⊙ (10-5 eV/m)3/2, where m is the mass of the vector. During and post soliton production a comparable fraction of the energy density is initially stored in, and subsequently radiated from, long-lived quasi-normal modes. Furthermore, the solitons are surrounded by characteristic 'fuzzy' dark matter halos in which quantum wave-like properties are also enhanced relative to the usual virialized dark matter expectations. Lower density compact halos, with masses a factor of ∼ 105 greater than the solitons, form at much larger scales. We argue that, at minimum, the solitons are likely to survive to the present day without being tidally disrupted. This rich substructure, which we anticipate also arises from other dark photon dark matter production mechanisms, opens up a wide range of new direct and indirect detection possibilities, as we discuss in a companion paper.

More details from the publisher
Details from ORA
More details

Micro-Bose/Proca dark matter stars from black hole superradiance

(2022)

Authors:

John March-Russell, João G Rosa
More details from the publisher
Details from ArXiV

Dark Photon Stars: Formation and Role as Dark Matter Substructure

(2022)

Authors:

Marco Gorghetto, Edward Hardy, John March-Russell, Ningqiang Song, Stephen M West
Details from ArXiV
More details from the publisher

A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

(2022)

Authors:

J Aalbers, K Abe, V Aerne, F Agostini, S Ahmed Maouloud, DS Akerib, D Yu Akimov, J Akshat, AK Al Musalhi, F Alder, SK Alsum, L Althueser, CS Amarasinghe, FD Amaro, A Ames, TJ Anderson, B Andrieu, N Angelides, E Angelino, J Angevaare, VC Antochi, D Antón Martin, B Antunovic, E Aprile, HM Araújo, JE Armstrong, F Arneodo, M Arthurs, P Asadi, S Baek, X Bai, D Bajpai, A Baker, J Balajthy, S Balashov, M Balzer, A Bandyopadhyay, J Bang, E Barberio, JW Bargemann, L Baudis, D Bauer, D Baur, A Baxter, AL Baxter, M Bazyk, K Beattie, J Behrens, NF Bell, L Bellagamba, P Beltrame, M Benabderrahmane, EP Bernard, GF Bertone, P Bhattacharjee, A Bhatti, A Biekert, TP Biesiadzinski, AR Binau, R Biondi, Y Biondi, HJ Birch, F Bishara, A Bismark, C Blanco, GM Blockinger, E Bodnia, C Boehm, AI Bolozdynya, PD Bolton, S Bottaro, C Bourgeois, B Boxer, P Brás, A Breskin, PA Breur, CAJ Brew, J Brod, E Brookes, A Brown, E Brown, S Bruenner, G Bruno, R Budnik, TK Bui, S Burdin, S Buse, JK Busenitz, D Buttazzo, M Buuck, A Buzulutskov, R Cabrita, C Cai, D Cai, C Capelli, JMR Cardoso, MC Carmona-Benitez, M Cascella, R Catena, S Chakraborty, C Chan, S Chang, A Chauvin, A Chawla, H Chen, V Chepel, NI Chott, D Cichon, A Cimental Chavez, B Cimmino, M Clark, RT Co, AP Colijn, J Conrad, MV Converse, M Costa, A Cottle, G Cox, O Creaner, JJ Cuenca Garcia, JP Cussonneau, JE Cutter, CE Dahl, V D'Andrea, A David, MP Decowski, JB Dent, FF Deppisch, L de Viveiros, P Di Gangi, A Di Giovanni, S Di Pede, J Dierle, S Diglio, JEY Dobson, M Doerenkamp, D Douillet, G Drexlin, E Druszkiewicz, D Dunsky, K Eitel, A Elykov, T Emken, R Engel, SR Eriksen, M Fairbairn, A Fan, JJ Fan, SJ Farrell, S Fayer, NM Fearon, A Ferella, C Ferrari, A Fieguth, A Fieguth, S Fiorucci, H Fischer, H Flaecher, M Flierman, T Florek, R Foot, PJ Fox, R Franceschini, ED Fraser, CS Frenk, S Frohlich, T Fruth, W Fulgione, C Fuselli, P Gaemers, R Gaior, RJ Gaitskell, M Galloway, F Gao, I Garcia Garcia, J Genovesi, C Ghag, S Ghosh, E Gibson, W Gil, D Giovagnoli, F Girard, R Glade-Beucke, F Glück, S Gokhale, A de Gouvêa, L Gráf, L Grandi, J Grigat, B Grinstein, MGD van der Grinten, R Grössle, H Guan, M Guida, R Gumbsheimer, CB Gwilliam, CR Hall, LJ Hall, R Hammann, K Han, V Hannen, S Hansmann-Menzemer, R Harata, SP Hardin, E Hardy, CA Hardy, K Harigaya, R Harnik, SJ Haselschwardt, M Hernandez, SA Hertel, A Higuera, C Hils, S Hochrein, L Hoetzsch, M Hoferichter, N Hood, D Hooper, M Horn, J Howlett, DQ Huang, Y Huang, D Hunt, M Iacovacci, G Iaquaniello, R Ide, CM Ignarra, G Iloglu, Y Itow, E Jacquet, O Jahangir, J Jakob, RS James, A Jansen, W Ji, X Ji, F Joerg, J Johnson, A Joy, AC Kaboth, AC Kamaha, K Kanezaki, K Kar, M Kara, N Kato, P Kavrigin, S Kazama, AW Keaveney, J Kellerer, D Khaitan, A Khazov, G Khundzakishvili, I Khurana, B Kilminster, M Kleifges, P Ko, M Kobayashi, M Kobayashi, D Kodroff, G Koltmann, A Kopec, A Kopmann, J Kopp, L Korley, VN Kornoukhov, EV Korolkova, H Kraus, LM Krauss, S Kravitz, L Kreczko, VA Kudryavtsev, F Kuger, J Kumar, B López Paredes, L LaCascio, Q Laine, H Landsman, RF Lang, EA Leason, J Lee, DS Leonard, KT Lesko, L Levinson, C Levy, I Li, SC Li, T Li, S Liang, CS Liebenthal, J Lin, Q Lin, S Lindemann, M Lindner, A Lindote, R Linehan, WH Lippincott, X Liu, K Liu, J Liu, J Loizeau, F Lombardi, J Long, MI Lopes, E Lopez Asamar, W Lorenzon, C Lu, S Luitz, Y Ma, PAN Machado, C Macolino, T Maeda, J Mahlstedt, PA Majewski, A Manalaysay, A Mancuso, L Manenti, A Manfredini, RL Mannino, N Marangou, J March-Russell, F Marignetti, T Marrodán Undagoitia, K Martens, R Martin, I Martinez-Soler, J Masbou, D Masson, E Masson, S Mastroianni, M Mastronardi, JA Matias-Lopes, ME McCarthy, N McFadden, E McGinness, DN McKinsey, J McLaughlin, K McMichael, P Meinhardt, J Menéndez, Y Meng, M Messina, R Midha, D Milisavljevic, EH Miller, B Milosevic, S Milutinovic, SA Mitra, K Miuchi, E Mizrachi, K Mizukoshi, A Molinario, A Monte, CMB Monteiro, ME Monzani, JS Moore, K Morå, JA Morad, JD Morales Mendoza, S Moriyama, E Morrison, E Morteau, Y Mosbacher, BJ Mount, J Mueller, A St J Murphy, M Murra, D Naim, S Nakamura, E Nash, N Navaieelavasani, A Naylor, C Nedlik, HN Nelson, F Neves, JL Newstead, K Ni, JA Nikoleyczik, V Niro, UG Oberlack, M Obradovic, K Odgers, CAJ O'Hare, P Oikonomou, I Olcina, K Oliver-Mallory, A Oranday, J Orpwood, I Ostrovskiy, K Ozaki, B Paetsch, S Pal, J Palacio, KJ Palladino, J Palmer, P Panci, M Pandurovic, A Parlati, N Parveen, SJ Patton, V Pěč, Q Pellegrini, B Penning, G Pereira, R Peres, Y Perez-Gonzalez, E Perry, T Pershing, R Petrossian-Byrne, J Pienaar, A Piepke, G Pieramico, M Pierre, M Piotter, V Pizella, G Plante, T Pollmann, D Porzio, J Qi, Y Qie, J Qin, N Raj, M Rajado Silva, K Ramanathan, D Ramírez García, J Ravanis, L Redard-Jacot, D Redigolo, S Reichard, J Reichenbacher, CA Rhyne, A Richards, Q Riffard, GRC Rischbieter, A Rocchetti, SL Rosenfeld, R Rosero, N Rupp, T Rushton, S Saha, L Sanchez, P Sanchez-Lucas, D Santone, JMF dos Santos, I Sarnoff, G Sartorelli, ABMR Sazzad, M Scheibelhut, RW Schnee, M Schrank, J Schreiner, P Schulte, D Schulte, H Schulze Eissing, M Schumann, T Schwemberger, A Schwenk, T Schwetz, L Scotto Lavina, PR Scovell, H Sekiya, M Selvi, E Semenov, F Semeria, P Shagin, S Shaw, S Shi, E Shockley, TA Shutt, R Si-Ahmed, JJ Silk, C Silva, MC Silva, H Simgen, F Šimkovic, G Sinev, R Singh, W Skulski, J Smirnov, R Smith, M Solmaz, VN Solovov, P Sorensen, J Soria, TJ Sparmann, I Stancu, M Steidl, A Stevens, K Stifter, LE Strigari, D Subotic, B Suerfu, AM Suliga, TJ Sumner, P Szabo, M Szydagis, A Takeda, Y Takeuchi, P-L Tan, C Taricco, WC Taylor, DJ Temples, A Terliuk, PA Terman, D Thers, K Thieme, Th Thümmler, DR Tiedt, M Timalsina, WH To, F Toennies, Z Tong, F Toschi, DR Tovey, J Tranter, M Trask, GC Trinchero, M Tripathi, DR Tronstad, R Trotta, YD Tsai, CD Tunnell, WG Turner, R Ueno, P Urquijo, U Utku, A Vaitkus, K Valerius, E Vassilev, S Vecchi, V Velan, S Vetter, AC Vincent, L Vittorio, G Volta, B von Krosigk, M von Piechowski, D Vorkapic, CEM Wagner, AM Wang, B Wang, Y Wang, W Wang, JJ Wang, L-T Wang, M Wang, Y Wang, JR Watson, Y Wei, C Weinheimer, E Weisman, M Weiss, D Wenz, SM West, TJ Whitis, M Williams, MJ Wilson, D Winkler, C Wittweg, J Wolf, T Wolf, FLH Wolfs, S Woodford, D Woodward, CJ Wright, VHS Wu, P Wu, S Wüstling, M Wurm, Q Xia, X Xiang, Y Xing, J Xu, Z Xu, D Xu, M Yamashita, R Yamazaki, H Yan, L Yang, Y Yang, J Ye, M Yeh, I Young, HB Yu, TT Yu, L Yuan, G Zavattini, S Zerbo, Y Zhang, M Zhong, N Zhou, X Zhou, T Zhu, Y Zhu, Y Zhuang, JP Zopounidis, K Zuber, J Zupan
More details from the publisher
Details from ArXiV

Cold Atoms in Space: Community Workshop Summary and Proposed Road-Map

(2022)

Authors:

Ivan Alonso, Cristiano Alpigiani, Brett Altschul, Henrique Araujo, Gianluigi Arduini, Jan Arlt, Leonardo Badurina, Antun Balaz, Satvika Bandarupally, Barry C Barish Michele Barone, Michele Barsanti, Steven Bass, Angelo Bassi, Baptiste Battelier, Charles FA Baynham, Quentin Beaufils, Aleksandar Belic, Joel Berge, Jose Bernabeu, Andrea Bertoldi, Robert Bingham, Sebastien Bize, Diego Blas, Kai Bongs, Philippe Bouyer, Carla Braitenberg, Christian Brand, Claus Braxmaier, Alexandre Bresson, Oliver Buchmueller, Dmitry Budker, Luıs Bugalho, Sergey Burdin, Luigi Cacciapuoti Simone Callegari, Xavier Calmet, Davide Calonico, Benjamin Canuel, Laurentiu-Ioan Caramete, Olivier Carraz, Donatella Cassettari, Pratik Chakraborty, Swapan Chattopadhyay, Upasna Chauhan, Xuzong Chen, Yu-Ao Chen, Maria Luisa Chiofalo, Jonathon Coleman, Robin Corgier, JP Cotter, A Michael Cruise, Yanou Cui, Gavin Davies, Albert De Roeck, Marcel Demarteau, Andrei Derevianko, Marco Di Clemente, Goran S Djordjevic, Sandro Donadi, Olivier Dore, Peter Dornan, Michael Doser, Giannis Drougakis, Jacob Dunningham, Sajan Easo, Joshua Eby, Gedminas Elertas, John Ellis, David Evans, Pandora Examilioti, Pavel Fadeev, Mattia Fanı, Farida Fassi, Marco Fattori, Michael A Fedderke, Daniel Felea, Chen-Hao Feng, Jorge Ferreras, Robert Flack, Victor V Flambaum, Rene Forsberg, Mark Fromhold, Naceur Gaaloul, Barry M Garraway, Maria Georgousi, Andrew Geraci, Kurt Gibble, Valerie Gibson, Patrick Gill, Gian F Giudice, Jon Goldwin, Oliver Gould, Oleg Grachov, Peter W Graham, Dario Grasso, Paul F Griffin, Christine Guerlin, Mustafa Gundogan, Ratnesh K Gupta, Martin Haehnelt, Ekim T Hanımeli, Leonie Hawkins, Aurelien Hees, Victoria A Henderson, Waldemar Herr, Sven Herrmann, Thomas Hird, Richard Hobson, Vincent Hock, Jason M Hogan, Bodil Holst, Michael Holynski, Ulf Israelsson, Peter Jeglic, Philippe Jetzer, Gediminas Juzeliunas, Rainer Kaltenbaek, Jernej F Kamenik, Alex Kehagias, Teodora Kirova, Marton Kiss-Toth, Sebastian Koke, Shimon Kolkowitz, Georgy Kornakov, Tim Kovachy, Markus Krutzik, Mukesh Kumar, Pradeep Kumar, Claus Lammerzahl, Greg Landsberg, Christophe Le Poncin-Lafitte, David R Leibrandt, Thomas Leveque, Marek Lewicki, Rui Li, Anna Lipniacka, Christian Lisdat Mia Liu, JL Lopez-Gonzalez, Sina Loriani, Jorma Louko, Giuseppe Gaetano Luciano, Nathan Lundblad, Steve Maddox, MA Mahmoud, Azadeh Maleknejad, John March-Russell, Didier Massonnet, Christopher McCabe, Matthias Meister, Tadej Meznarsic, Salvatore Micalizio, Federica Migliaccio, Peter Millington, Milan Milosevic, Jeremiah Mitchell, Gavin W Morley, Jurgen Muller, Eamonn Murphy, Ozgur E Mustecaplıoglu, Val OShea, Daniel KL Oi, Judith Olson, Debapriya Pal, Dimitris G Papazoglou, Elizabeth Pasatembou, Mauro Paternostro, Krzysztof Pawlowski, Emanuele Pelucchi, Franck Pereira dos Santos, Achim Peters, Igor Pikovski, Apostolos Pilaftsis, Alexandra Pinto, Marco Prevedelli, Vishnupriya Puthiya-Veettil, John Quenby, Johann Rafelski, Ernst M Rasel, Cornelis Ravensbergen, Mirko Reguzzoni, Andrea Richaud, Isabelle Riou, Markus Rothacher, Albert Roura, Andreas Ruschhaupt, Dylan O Sabulsky, Marianna Safronova, Ippocratis D Saltas, Leonardo Salvi, Muhammed Sameed, Pandey Saurabh, Stefan Schaffer, Stephan Schiller, Manuel Schilling, Vladimir Schkolnik, Dennis Schlippert, Piet O Schmidt, Harald Schnatz, Jean Schneider, Ulrich Schneider, Florian Schreck, Christian Schubert, Armin Shayeghi, Nathaniel Sherrill, Ian Shipsey, Carla Signorini, Rajeev Singh, Yeshpal Singh, Constantinos Skordis, Augusto Smerzi, Carlos F Sopuerta, Fiodor Sorrentino, Paraskevas Sphicas, Yevgeny V Stadnik, Petruta Stefanescu, Marco G Tarallo, Silvia Tentindo, Guglielmo M Tino, Jonathan N Tinsley, Vincenza Tornatore, Philipp Treutlein, Andrea Trombettoni, Yu-Dai Tsai, Philip Tuckey, Melissa A Uchida, Tristan Valenzuela, Mathias Van Den Bossche, Ville Vaskonen, Gunjan Verma, Flavio Vetrano, Christian Vogt, Wolf von Klitzing, Pierre Waller, Reinhold Walser, Eric Wille Jason Williams, Patrick Windpassinger, Ulric Wittrock, Peter Wolf, Marian Woltmann, Lisa Worner, Andre Xuereb, Mohamed Yahia, Efe Yazgan, Nan Yu, Nassim Zahzam, Emmanuel Zambrini Cruzeiro, Mingsheng Zhan, Xinhao Zou, Jure Zupan, Erik Zupanic
More details from the publisher
Details from ArXiV

Pagination

  • First page First
  • Previous page Prev
  • Page 1
  • Page 2
  • Current page 3
  • Page 4
  • Page 5
  • Page 6
  • Page 7
  • Page 8
  • Page 9
  • …
  • Next page Next
  • Last page Last

Footer Menu

  • Contact us
  • Giving to the Dept of Physics
  • Work with us
  • Media

User account menu

  • Log in

Follow us

FIND US

Clarendon Laboratory,

Parks Road,

Oxford,

OX1 3PU

CONTACT US

Tel: +44(0)1865272200

University of Oxfrod logo Department Of Physics text logo
IOP Juno Champion logo Athena Swan Silver Award logo

© University of Oxford - Department of Physics

Cookies | Privacy policy | Accessibility statement

Built by: Versantus

  • Home
  • Research
  • Study
  • Engage
  • Our people
  • News & Comment
  • Events
  • Our facilities & services
  • About us
  • Current students
  • Staff intranet