Browsing by Author "0cc8ea5e-d24d-45e7-859d-bb1c430243cb"

Now showing items 1-6 of 6

    • A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887 
      Jeffers, S. V.; Dreizier, S.; Barnes, J. R.; Haswell, C. A.; Nelson, R. P.; Rodríguez, E.; López González, M. J.; Morales, N.; Luque, R.; Zechmeister, M.; Vogt, S. S.; Jenkins, James Stewart; Palle, E.; Berdinas, Z. M.; Coleman, G.; Díaz, M. R.; Ribas, I.; Jones, H.R.A.; Butler, R. P.; Tinney, C. G.; Bailey, J.; Carter, B. D.; O'Toole, S.; Wittenmyer, R. A; Crane, J. D.; Feng, F.; Shectman, S. A.; Teske, J.; Reiners, A.; Amado, P. J.; Anglada Escude, G. (Amer Assoc Advancement Science, 2020)
      The closet exoplanets to the Sun provide opportunities for detailed characterization of planets outside the Solar System. We report the discovery, using radial velocity measurements, of a compact multiplanet system of ...
    • Red Dots: A temperate 1.5 Earth-mass planet in a compact multi-terrestrial planet system around GJ 1061? 
      Dreizler, S.; Jeffers, S. V.; Rodríguez, E.; Zechmeister, M.; Barnes, J. R.; Haswell, C. A.; Coleman, G.; Lalitha, S.; Hidalgo Soto, D.; Strachan, J. B. P.; Hambsch, F.-J.; López González, M. J.; Morales, N.; Rodríguez López, C.; Berdiñas, Z. M.; Ribas, I.; Pallé, E.; Reiners, A.; Anglada Escudé, G. (Oxford University Press, 2020)
      Small low-mass stars are favourable targets for the detection of rocky habitable planets. In particular, planetary systems in the solar neighbourhood are interesting and suitable for precise characterization. The RedDots ...
    • SALT observations of the chromospheric activity of transiting planet hosts: Mass-loss and star-planet interactions 
      Staab, D.; Haswell, C. A.; Smith, Gareth D.; Fossati, L.; Barnes, J. R.; Busuttil, R.; Jenkins, James Stewart (Oxford University, 2017)
      We measured the chromospheric activity of the four hot Jupiter hosts WASP-43, WASP-51/HAT-P-30, WASP-72 and WASP-103 to search for anomalous values caused by the close-in companions. The Mount Wilson CaIIH&KS-index was ...
    • Surprisingly different starspot distributions on the near equal-mass equal-rotation-rate stars in the M ... 
      Barnes, J. R.; Jeffers, S. V.; Haswell, C. A; Jones, H.R.A.; Shulyak, D.; Pavlenko, Ya. V.; Jenkins, James Stewart (Oxford University, 2017)
      We aim to understand how stellar parameters such as mass and rotation impact the distribution of star-spots on the stellar surface. To this purpose, we have used Doppler imaging to reconstruct the surface brightness ...
    • The CARMENES search for exoplanets around M dwarfs Characterization of the nearby ultra-compact multiplanetary ... 
      Stock, S.; Kemmer, J.; Reffert, S.; Trifonov, T.; Kaminski, A.; Dreizler, S.; Quirrenbach, A.; Caballero, J. A.; Reiners, A.; Jeffers, S. V.; Anglada Escudé, G.; Ribas, I.; Amado, P. J.; Barrado, D.; Barnes, J. R.; Bauer, F. F.; Modroño Berdiñas, Zaira; Béjar, V. J. S.; Coleman, G. A. L.; Cortés Contreras, M.; Díez Alonso, E.; Domínguez Fernández, A. J.; Espinoza, N.; Haswell, C. A.; Hatzes, A.; Henning, T.; Jenkins, James S.; Jones, H. R. A.; Kossakowski, D.; Kürster, M.; Lafarga, M.; Lee, M. H.; López González, M. J.; Montes, D.; Morales, J. C.; Morales, N.; Pallé, E.; Pedraz, S.; Rodríguez, E.; Rodríguez López, C.; Zechmeister, M. (EDP Sciences, 2020)
      Context. The nearby ultra-compact multiplanetary system YZ Ceti consists of at least three planets, and a fourth tentative signal. The orbital period of each planet is the subject of discussion in the literature due to ...
    • The effect of ISM absorption on stellar activity measurements and its relevance for exoplanet studies 
      Fossati, L.; Marcelja, S. E.; Staab, D.; Cubillos, P. E.; France, K.; Haswell, C. A.; Ingrassia, S.; Jenkins, James Stewart; Koskinen, T.; Lanza, A. F.; Redfield, S.; Youngblood, A.; Pelzmann, G. (EDP Sciences, 2017-05)
      Past ultraviolet and optical observations of stars hosting close-in Jupiter-mass planets have shown that some of these stars present an anomalously low chromospheric activity, significantly below the basal level. For the ...