Now showing items 1-8 of 8

    • Atmospheric origins of perchlorate on Mars and in the Atacama 

      Catling, D. C.; Claire, Mark; Zahnle, K. J.; Quinn, R. C.; Clark, B. C.; Hecht, M. H.; Kounaves, S. (2010) - Journal article
      Isotopic studies indicate that natural perchlorate is produced on Earth in arid environments by the oxidation of chlorine species through pathways involving ozone or its photochemical products. With this analogy, we propose ...
    • Environmental effects on the ionisation of brown dwarf atmospheres 

      Rodríguez-Barrera, M. Isabel; Helling, Christiane; Wood, Kenneth (2018-10) - Journal article
      Context. Brown dwarfs emit bursts of Hα, white-light flares, and show radio flares and quiescent radio emission. They are suggested to form aurorae, similar to planets in the solar system, but much more energetic. All these ...
    • Exoplanet biosignatures : a review of remotely detectable signs of life 

      Schwieterman, Edward W.; Kiang, Nancy Y.; Parenteau, Mary N.; Harman, Chester E.; DasSarma, Shiladitya; Fisher, Theresa M.; Arney, Giada N.; Hartnett, Hilairy E.; Reinhard, Christopher T.; Olson, Stephanie L.; Meadows, Victoria S.; Cockell, Charles S.; Walker, Sara I.; Grenfell, John Lee; Hegde, Siddharth; Rugheimer, Sarah; Hu, Renyu; Lyons, Timothy W. (2018-05-04) - Journal item
      In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitable exoplanets for signatures of life. Life ...
    • Glass rain : modelling the formation, dynamics and radiative-transport of cloud particles in hot Jupiter exoplanet atmospheres 

      Lee, Graham Kim Huat (University of St Andrews, 2017-12-07) - Thesis
      The atmospheres of exoplanets are being characterised in increasing detail by observational facilities and will be examined with even greater clarity with upcoming space based missions such as the James Webb Space Telescope ...
    • The influence of galactic cosmic rays on ion-neutral hydrocarbon chemistry in the upper atmospheres of free-floating exoplanets 

      Rimmer, P.B.; Helling, C.; Bilger, C. (2014-04-01) - Journal article
      Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-concept that ion–neutral chemistry may be ...
    • Ionisation and discharge in cloud-forming atmospheres of brown dwarfs and extrasolar planets 

      Helling, Christiane; Rimmer, Paul B.; Rodriguez-Barrera, Maria Isabel; Wood, Kenny; Robertson, G. B.; Stark, C. R. (2016-07) - Journal article
      Brown dwarfs and giant gas extrasolar planets have cold atmospheres with a rich chemical compositions from which mineral cloud particles form. Their properties, like particle sizes and material composition, vary with height, ...
    • Long-term planetary habitability and the carbonate-silicate cycle 

      Rushby, Andrew J.; Johnson, Martin; Mills, Benjamin J.W.; Watson, Andrew J.; Claire, Mark W. (2018-05-01) - Journal article
      The potential habitability of an exoplanet is traditionally assessed by determining whether its orbit falls within the circumstellar "habitable zone" of its star, defined as the distance at which water could be liquid on ...
    • Warm Spitzer occultation photometry of WASP-26b at 3.6 and 4.5 mu m 

      Mahtani, D. P.; Maxted, P. F. L.; Anderson, D. R.; Smith, A. M. S.; Smalley, B.; Tregloan-Reed, J.; Southworth, J.; Madhusudhan, N.; Cameron, A. Collier; Gillon, M.; Harrington, J.; Hellier, C.; Pollacco, D.; Queloz, D.; Triaud, A. H. M. J.; West, R. G. (2013-06-11) - Journal article
      We present new warm Spitzer occultation photometry of WASP-26 at 3.6 and 4.5 mu m along with new transit photometry taken in the g, r and i bands. We report the first detection of the occultation of WASP-26b, with occultation ...