Staff profile

• Big Bang Nucleosynthesis
• Cosmology
• The First Stars
• Fundamental Physics

• Astronomy and Astrophysics
• Centre for Extragalactic Astronomy

• ADS publication list

• 2020: RF040659: Astronomy Consolidated Grant 2020-2023 CEA, £2408347.17, 2020-04-01 - 2023-03-31

Journal Article

• Lofthouse, Emma K, Fumagalli, Michele, Fossati, Matteo, Dutta, Rajeshwari, Galbiati, Marta, Arrigoni Battaia, Fabrizio, Cantalupo, Sebastiano, Christensen, Lise, Cooke, Ryan J, Longobardi, Alessia, Murphy, Michael T & Prochaska, J Xavier (2023). MUSE Analysis of Gas around Galaxies (MAGG) – IV. The gaseous environment of z ∼ 3–4 Ly α emitting galaxies. Monthly Notices of the Royal Astronomical Society 518(1): 305 - 331.
• Lai, K.-F., Manalili, D., Ubachs, W., Cooke, R., Pettini, M., de Oliveira, N. & Salumbides, E. J. (2022). Vacuum Ultraviolet Fourier-transform Spectroscopy of 16O and 18O. The Astrophysical Journal Supplement Series 260(2): 37.
• Cooke, Ryan J., Noterdaeme, Pasquier, Johnson, James W., Pettini, Max, Welsh, Louise, Peroux, Celine, Murphy, Michael T. & Weinberg, David H. (2022). Primordial Helium-3 Redux: The Helium Isotope Ratio of the Orion Nebula*. The Astrophysical Journal 932(1): 60.
• Fossati, M, Fumagalli, M, Lofthouse, E K, Dutta, R, Cantalupo, S, Arrigoni Battaia, F, Fynbo, J P U, Lusso, E, Murphy, M T, Prochaska, J X, Theuns, T & Cooke, R J (2021). MUSE analysis of gas around galaxies (MAGG) – III. The gas and galaxy environment of z = 3–4.5 quasars. Monthly Notices of the Royal Astronomical Society 503(2): 3044-3064.
• Welsh, Louise, Cooke, Ryan & Fumagalli, Michele (2021). The stochastic enrichment of Population II stars. Monthly Notices of the Royal Astronomical Society 500(4): 5214-5228.
• Prochaska, J., Hennawi, Joseph, Westfall, Kyle, Cooke, Ryan, Wang, Feige, Hsyu, Tiffany, Davies, Frederick, Farina, Emanuele & Pelliccia, Debora (2020). PypeIt: The Python Spectroscopic Data Reduction Pipeline. Journal of Open Source Software 5(56): 2308.
• Dutta, Rajeshwari, Fumagalli, Michele, Fossati, Matteo, Lofthouse, Emma K., Prochaska, J. Xavier, Battaia, Fabrizio Arrigoni, Bielby, Richard M., Cantalupo, Sebastiano, Cooke, Ryan J., Murphy, Michael T. & O’Meara, John M. (2020). MUSE Analysis of Gas around Galaxies (MAGG) - II: Metal-enriched halo gas around z ∼ 1 galaxies. Monthly Notices of the Royal Astronomical Society 499(4): 5022-5046.
• Hsyu, Tiffany, Cooke, Ryan J., Prochaska, J. Xavier & Bolte, Michael (2020). The PHLEK Survey: A New Determination of the Primordial Helium Abundance. The Astrophysical Journal 896(1): 77.
• Pettini, Max, Fumagalli, Michele, Welsh, Louise & Cooke, Ryan (2020). A limit on Planck-scale froth with ESPRESSO. Monthly Notices of the Royal Astronomical Society 494(4): 4884-4890.
• Pettini, Max, Fumagalli, Michele, Cooke, Ryan & Welsh, Louise (2020). A bound on the 12C/13C ratio in near-pristine gas with ESPRESSO. Monthly Notices of the Royal Astronomical Society 494(1): 1411-1423.
• Sykes, Calvin, Fumagalli, Michele, Cooke, Ryan & Theuns, Tom (2020). Determining the primordial helium abundance and UV background using fluorescent emission in star-free dark matter haloes. Monthly Notices of the Royal Astronomical Society 492(2): 2151-2160.
• Lofthouse, Emma K, Fumagalli, Michele, Fossati, Matteo, O’Meara, John M, Murphy, Michael T, Christensen, Lise, Prochaska, J Xavier, Cantalupo, Sebastiano, Bielby, Richard M, Cooke, Ryan J, Lusso, Elisabeta & Morris, Simon L (2020). MUSE Analysis of Gas around Galaxies (MAGG) - I: Survey design and the environment of a near pristine gas cloud at z ≈ 3.5. Monthly Notices of the Royal Astronomical Society 491(2): 2057-2074.
• Cooke, Ryan (2019). The ACCELERATION programme: I. Cosmology with the redshift drift★. Monthly Notices of the Royal Astronomical Society 492(2): 2044-2057.
• Fossati, M, Fumagalli, M, Lofthouse, E K, D’Odorico, V, Lusso, E, Cantalupo, S, Cooke, R J, Cristiani, S, Haardt, F, Morris, S L, Peroux, C, Prichard, L J, Rafelski, M, Smail, I & Theuns, T (2019). The MUSE Ultra Deep Field (MUDF). II. Survey design and the gaseous properties of galaxy groups at 0.5 < z < 1.5. Monthly Notices of the Royal Astronomical Society 490(1): 1451-1469.
• Welsh, Louise, Cooke, Ryan & Fumagalli, Michele (2019). Modelling the chemical enrichment of Population III supernovae: The origin of the metals in near-pristine gas clouds. Monthly Notices of the Royal Astronomical Society 487(3): 3363–3376.
• Sykes, Calvin, Fumagalli, Michele, Cooke, Ryan, Theuns, Tom & Benítez–Llambay, Alejandro (2019). Fluorescent rings in star-free dark matter haloes. Monthly Notices of the Royal Astronomical Society 487(1): 609-621.
• Cooke, Ryan & Fumagalli, Michele (2018). Measurement of the primordial helium abundance from the intergalactic medium. Nature astronomy 2(12): 957-961.
• Hsyu, Tiffany, Cooke, Ryan J., Prochaska, J. Xavier & Bolte, Michael (2018). Searching for the lowest metallicity galaxies in the local universe. The Astrophysical Journal 863(2): 134.
• Cooke, Ryan J., Pettini, Max & Steidel, Charles C. (2018). One Percent Determination of the Primordial Deuterium Abundance. The Astrophysical Journal 855(2): 102.
• Sharma, Mahavir, Theuns, Tom, Frenk, Carlos S. & Cooke, Ryan J. (2018). Origins of carbon-enhanced metal-poor stars. Monthly Notices of the Royal Astronomical Society 473(1): 984-995.
• Hsyu, Tiffany, Cooke, Ryan J., Prochaska, J. Xavier & Bolte, Michael (2017). The Little Cub: Discovery of an Extremely Metal-poor Star-forming Galaxy in the Local Universe. The Astrophysical Journal 845(2): L22.
• Cooke, Ryan J., Pettini, Max & Steidel, Charles C. (2017). Discovery of the most metal-poor damped Lyman-α system. Monthly Notices of the Royal Astronomical Society 467(1): 802-811.
• Cooke, R. & Pettini, M. (2016). The primordial abundance of deuterium: ionization correction. Monthly Notices of the Royal Astronomical Society 455(2): 1512-1521.
• Cooke, R.J., Pettini, M., Nollett, K.M. & Jorgenson, R. (2016). The Primordial Deuterium Abundance of the Most Metal-poor Damped Lyman-alpha System. The Astrophysical Journal 830(2): 148.
• Mawatari, K., Inoue, A.K., Kousai, K., Hayashino, T., Cooke, R., Prochaska, J.X., Yamada, T. & Matsuda, Y. (2016). Discovery of a Damped Ly-alpha Absorber at z = 3.3 along a Galaxy Sight-line in the SSA22 Field. The Astrophysical Journal 817(2): 161.
• Shen, S., Cooke, R.J., Ramirez-Ruiz, E., Madau, P., Mayer, L. & Guedes, J. (2015). The History of R-Process Enrichment in the Milky Way. The Astrophysical Journal 807: 115.
• Cucchiara, A., Fumagalli, M., Rafelski, M., Kocevski, D., Prochaska, J. X., Cooke, R. J. & Becker, G. D. (2015). Unveiling the Secrets of Metallicity and Massive Star Formation Using DLAs along Gamma-Ray Bursts. The Astrophysical Journal 804(1): 51.
• Cooke, R.J., Pettini, M. & Jorgenson, R.A. (2015). The most metal-poor damped Lyα systems: An insight into dwarf galaxies at high redshift. The Astrophysical Journal 800(1): 12.
• Cooke, R.J. (2015). Big Bang Nucleosynthesis and the Helium Isotope Ratio. The Astrophysical Journal Letters 812: L12.
• Cooke, R.J. & Madau, P. (2014). Carbon-enhanced Metal-poor Stars: Relics from the Dark Ages. The Astrophysical Journal 791(2): 116.
• Cooke, R.J., Pettini, M., Jorgenson, R.A., Murphy, M.T. & Steidel, C.C. (2014). Precision Measures of the Primordial Abundance of Deuterium. The Astrophysical Journal 781(1): 31.
• Cooke, R., Pettini, M., Jorgenson, R.A., Murphy, M.T., Rudie, G.C. & Steidel, C.C. (2013). The explosion energy of early stellar populations: the Fe-peak element ratios in low-metallicity damped Ly-alpha systems. Monthly Notices of the Royal Astronomical Society 431: 1625-1637.
• Deason, A.J., Belokurov, V., Evans, N.W., Koposov, S.E., Cooke, R.J., Peñarrubia, J., Laporte, C.F.P., Fellhauer, M., Walker, M.G. & Olszewski, E.W. (2012). The cold veil of the Milky Way stellar halo. Monthly Notices of the Royal Astronomical Society 425(4): 2840-2853.
• Cooke, R., Pettini, M. & Murphy, M.T. (2012). A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Ly-alpha systems. Monthly Notices of the Royal Astronomical Society 425: 347-354.
• Pettini, M. & Cooke, R. (2012). A new, precise measurement of the primordial abundance of deuterium. Monthly Notices of the Royal Astronomical Society 425: 2477-2486.
• Steiner, J.F., Reis, R.C., Fabian, A.C., Remillard, R.A., McClintock, J.E., Gou, L., Cooke, R., Brenneman, L.W. & Sanders, J.S. (2012). A broad iron line in LMC X-1. Monthly Notices of the Royal Astronomical Society 427: 2552-2561.
• Cooke, R., Pettini, M., Steidel, C.C., Rudie, G.C. & Nissen, P.E. (2011). The most metal-poor damped Lyα systems: insights into chemical evolution in the very metal-poor regime. Monthly Notices of the Royal Astronomical Society 417(2): 1534-1558.
• Cooke, R., Pettini, M., Steidel, C.C., Rudie, G.C. & Jorgenson, R.A. (2011). A carbon-enhanced metal-poor damped Ly$\alpha$ system: probing gas from Population III nucleosynthesis? Monthly Notices of the Royal Astronomical Society 412: 1047-1058.
• Cooke, R., Pettini, M., Steidel, C.C., King, L.J., Rudie, G.C. & Rakic, O. (2010). A newly discovered DLA and associated Ly-alpha emission in the spectra of the gravitationally lensed quasar UM673A,B. Monthly Notices of the Royal Astronomical Society 409: 679-693.
• Cooke, R. & Lynden-Bell, D. (2010). Does the Universe accelerate equally in all directions? Monthly Notices of the Royal Astronomical Society 401: 1409-1414.
• Cooke, R., Bland-Hawthorn, J., Sharp, R. & Kuncic, Z. (2008). Ionization Cone in the X-Ray Binary LMC X-1. The Astrophysical Journal Letters 687: L29.
• Cooke, R., Kuncic, Z., Sharp, R. & Bland-Hawthorn, J. (2007). Spectacular Trailing Streamers near LMC X-1: The First Evidence of a Jet? The Astrophysical Journal Letters 667: L163-L166.