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Dr John Barnes

Profile summary

  • Research Staff
  • Research Fellow
  • Faculty of Science, Technology, Engineering & Mathematics
  • School of Physical Sciences
  • john.barnes

Professional biography

I am a researcher working in the Astronomy Discipline at the Research Centre for Physical and Earth Sciences in the Open University. My research involves the study of cool stars, exoplanet detection and characterisation. 

See my personal website for more information.


Research interests

My research interests focus on the study of stellar activity, using high resolution spectroscopy. I have used tomographic techniques to obtain some of the first indirect images of spots on G dwarf stars like the Sun, and the least massive M dwarf stars. I have also carried out searches for molecules in close orbiting extrasolar planets and implemented the most precise radial velocity searches for planets at the bottom of the main sequence.

Teaching interests

I have taught a number of courses at different levels, including cosmology, exoplanets, star formation and plasma astrophysics. I have also taught and tutored courses in programming and mathematics.


A candidate super-Earth planet orbiting near the snow line of Barnard’s star (2018-11-15)
Ribas, I.; Tuomi, M.; Reiners, A.; Butler, R. P.; Morales, J. C.; Perger, M.; Dreizler, S.; Rodríguez-López, C.; González Hernández, J. I.; Rosich, A.; Feng, F.; Trifonov, T.; Vogt, S. S.; Caballero, J. A.; Hatzes, A.; Herrero, E.; Jeffers, S. V.; Lafarga, M.; Murgas, F.; Nelson, R. P.; Rodríguez, E.; Strachan, J. B. P.; Tal-Or, L.; Teske, J.; Toledo-Padrón, B.; Zechmeister, M.; Quirrenbach, A.; Amado, P. J.; Azzaro, M.; Béjar, V. J. S.; Barnes, J. R.; Berdiñas, Z. M.; Burt, J.; Coleman, G.; Cortés-Contreras, M.; Crane, J.; Engle, S. G.; Guinan, E. F.; Haswell, C. A.; Henning, Th.; Holden, B.; Jenkins, J.; Jones, H. R. A.; Kaminski, A.; Kiraga, M.; Kürster, M.; Lee, M. H.; López-González, M. J.; Montes, D.; Morin, J.; Ofir, A.; Pallé, E.; Rebolo, R.; Reffert, S.; Schweitzer, A.; Seifert, W.; Shectman, S. A.; Staab, D.; Street, R. A.; Suárez Mascareño, A.; Tsapras, Y.; Wang, S. X. and Anglada-Escudé, G.
Nature, 563(7731) (pp. 365-368)
The relation between stellar magnetic field geometry and chromospheric activity cycles – II The rapid 120-day magnetic cycle of τ Bootis (2018-10-01)
Jeffers, S. V.; Mengel, M.; Moutou, C.; Marsden, S. C.; Barnes, J. R.; Jardine, M. M.; Petit, P.; Schmitt, J. H. M. M.; See, V.; Vidotto, A. A. and the BCool collaboration,
Monthly Notices of the Royal Astronomical Society, 479(4) (pp. 5266-5271)
AD Leonis: Radial Velocity Signal of Stellar Rotation or Spin–Orbit Resonance? (2018-05)
Tuomi, Mikko; Jones, Hugh R. A.; Barnes, John R.; Anglada-Escudé, Guillem; Butler, R. Paul; Kiraga, Marcin and Vogt, Steven S.
The Astronomical Journal, 155, Article 192(5)
The relation between stellar magnetic field geometry and chromospheric activity cycles - I. The highly variable field of ɛ Eridani at activity minimum (2017-10-31)
Jeffers, S. V.; Boro, S. S.; Barnes, J. R.; Petit, P.; Marsden, S. C.; Jardine, M. M.; Vidotto, A. A. and the BCool collaboration,
Monthly Notices of the Royal Astronomical Society: Letters, 471(1) (L96-L100)
Color Difference Makes a Difference: Four Planet Candidates around τ Ceti (2017-10)
Feng, F.; Tuomi, M.; Jones, H. R. A.; Barnes, J.; Anglada-Escudé, G.; Vogt, S. S. and Butler, R. P.
The Astronomical Journal, 154(4) (p 135)
High-cadence spectroscopy of M-dwarfs – II. Searching for stellar pulsations with HARPS (2017-08-21)
Berdiñas, Z. M.; Rodríguez-López, C.; Amado, P. J.; Anglada-Escudé, G.; Barnes, J. R.; MacDonald, J.; Zechmeister, M. and Sarmiento, L. F.
Monthly Notices of the Royal Astronomical Society, 469(4) (pp. 4268-4282)
Calculations of periodicity from Hα profiles of Proxima Centauri (2017-06)
Collins, John M.; Jones, Hugh R. A. and Barnes, John R.
Astronomy & Astrophysics, 602, Article A48
Recovering planet radial velocity signals in the presence of starspot activity in fully convective stars (2017-04-30)
Barnes, J.R.; Jeffers, S. V.; Anglada-Escudé, G.; Haswell, C.A.; Jones, H. R. A.; Tuomi, M.; Feng, F.; Jenkins, J. S. and Petit, P.
Monthly Notices of the Royal Astronomical Society, 466(2) (pp. 1733-1740)
SALT observations of the Chromospheric Activity of Transiting Planet Hosts: Mass Loss and Star Planet Interactions (2017-04)
Staab, D.; Haswell, C.A.; Smith, Gareth D.; Fossati, L.; Barnes, J.R.; Busuttil, R. and Jenkins, J.S.
Monthly Notices of the Royal Astronomical Society, 466(1) (pp. 738-748)
New planetary systems from the Calan–Hertfordshire Extrasolar Planet Search (2017-04)
Jenkins, J. S.; Jones, H. R. A.; Tuomi, M.; Díaz, M.; Cordero, J. P.; Aguayo, A.; Pantoja, B.; Arriagada, P.; Mahu, R.; Brahm, R.; Rojo, P.; Soto, M. G.; Ivanyuk, O.; Becerra Yoma, N.; Day-Jones, A. C.; Ruiz, M. T.; Pavlenko, Y. V.; Barnes, J. R.; Murgas, F.; Pinfield, D. J.; Jones, M. I.; López-Morales, M.; Shectman, S.; Butler, R. P. and Minniti, D.
Monthly Notices of the Royal Astronomical Society, 466(1) (pp. 443-473)
Surprisingly different star-spot distributions on the near equal-mass equal-rotation-rate stars in the M dwarf binary GJ 65 AB (2017)
Barnes, J. R.; Jeffers, S. V.; Haswell, C. A.; Jones, H. R. A.; Shulyak, D.; Pavlenko, Ya. V. and Jenkins, J. S.
Monthly Notices of the Royal Astronomical Society, 471(1) (pp. 811-823)
The origin of the excess transit absorption in the HD 189733 system: planet or star? (2016-10-11)
Barnes, J. R.; Haswell, C. A.; Staab, D. and Anglada-Escudé, G.
Monthly Notices of the Royal Astronomical Society, 462(1) (pp. 1012-1028)
A terrestrial planet candidate in a temperate orbit around Proxima Centauri (2016-08-25)
Anglada-Escudé, Guillem; Amado, Pedro J.; Barnes, John; Berdiñas, Zaira M.; Butler, R. Paul; Coleman, Gavin A. L.; de la Cueva, Ignacio; Dreizler, Stefan; Endl, Michael; Giesers, Benjamin; Jeffers, Sandra V.; Jenkins, James S.; Jones, Hugh R. A.; Kiraga, Marcin; Kürster, Martin; López-González, Marίa J.; Marvin, Christopher J.; Morales, Nicolás; Morin, Julien; Nelson, Richard P.; Ortiz, José L.; Ofir, Aviv; Paardekooper, Sijme-Jan; Reiners, Ansgar; Rodríguez, Eloy; Rodrίguez-López, Cristina; Sarmiento, Luis F.; Strachan, John P.; Tsapras, Yiannis; Tuomi, Mikko and Zechmeister, Mathias
Nature, 536(7617) (pp. 437-440)
High-cadence spectroscopy of M dwarfs – I. Analysis of systematic effects in HARPS-N line profile measurements on the bright binary GJ 725A+B (2016-07-11)
Berdiñas, Z. M.; Amado, P. J.; Anglada-Escudé, G.; Rodríguez-López, C. and Barnes, J.
Monthly Notices of the Royal Astronomical Society, 459(4) (pp. 3551-3564)
The first Doppler images of the eclipsing binary SZ Piscium (2016-02-11)
Xiang, Yue; Gu, Shenghong; Cameron, A. Collier; Barnes, J. R. and Zhang, Liyun
Monthly Notices of the Royal Astronomical Society, 456(1) (pp. 314-322)
A maximum entropy approach to detect close-in giant planets around active stars (2015-12)
Petit, P.; Donati, J.-F.; Hébrard, E.; Morin, J.; Folsom, C. P.; Böhm, T.; Boisse, I.; Borgniet, S.; Bouvier, J.; Delfosse, X.; Hussain, G.; Jeffers, S. V.; Marsden, S. C. and Barnes, J. R.
Astronomy & Astrophysics, 584 (A84)
Starspot distributions on fully convective M dwarfs: implications for radial velocity planet searches (2015-10-07)
Barnes, J. R.; Jeffers, S. V.; Jones, H. R. A.; Pavlenko, Ya. V.; Jenkins, J. S.; Haswell, C. A. and Lohr, M. E.
The Astrophysical Journal, 812(1) (p 42)
Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a planetary companion (2015)
Hernán-Obispo, M.; Tuomi, M.; Gálvez-Ortiz, M. C.; Golovin, A.; Barnes, J. R.; Jones, H. R. A.; Kane, S. R.; Pinfield, D.; Jenkins, J. S.; Petit, P.; Anglada-Escudé, G.; Marsden, S. C.; Catalán, S.; Jeffers, S. V.; de Castro, E.; Cornide, M.; Garcés, A.; Jones, M. I.; Gorlova, N. and Andreev, M.
Astronomy & Astrophysics, 576, Article A66
Photospheric acne at the bottom of the main-sequence: Doppler images of M4.5 - M9V stars (2016)
Barnes, John; Haswell, Carole; Jeffers, Sandra; Jones, Hugh; Pavlenko, Yakiv; Lohr, Marcus and Jenkins, James
In : The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (Jun 2016, Uppsala, Sweden)
Characterising exoplanets and their environment with UV transmission spectroscopy (2015-03-04)
Fossati, L.; Bourrier, V.; Ehrenreich, D.; Haswell, C. A.; Kislyakova, K.G.; Lammer, H.; Lecavelier des Etangs, A.; Alibert, Y.; Ayres, T. R.; Ballester, G. E.; Barnes, J.; Bisikalo, D. V.; Cameron, A. Collier; Czesla, S.; Desert, J.-M.; France, K.; Gudel, M.; Guenther, E.; Helling, Ch.; Heng, K.; Homstrom, M.; Kaltenegger, L.; Koskinen, T.; Lanza, A. F.; Linsky, J. L.; Mordasini, C.; Pagano, I.; Pollacco, D.; Rauer, H.; Reiners, A.; Salz, M.; Schneider, P. C.; Shematovich, V. I.; Staab, D.; Vidotto, A. A.; Wheatley, P. J.; Wood, B. E. and Yelle, R. V.
Space Telescope Science Institute

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