LEADER 04133nam 22006615 450 001 9910254627203321 005 20200701154557.0 010 $a3-319-41273-6 024 7 $a10.1007/978-3-319-41273-3 035 $a(CKB)3710000000754889 035 $a(DE-He213)978-3-319-41273-3 035 $a(MiAaPQ)EBC4602518 035 $a(PPN)194513475 035 $a(EXLCZ)993710000000754889 100 $a20160718d2016 u| 0 101 0 $aeng 135 $aurnn|008mamaa 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aRadial-velocity Searches for Planets Around Active Stars$b[electronic resource] /$fby Raphaëlle D. Haywood 205 $a1st ed. 2016. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2016. 215 $a1 online resource (XV, 140 p. 60 illus., 57 illus. in color.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 300 $a"Doctoral thesis accepted by the University of St. Andrews, UK." 311 $a3-319-41272-8 320 $aIncludes bibliographical references at the end of each chapters and index. 327 $aIntroduction: the Hunt for Extra-solar Planets -- A Toolkit to Detect Planets Around Active Stars -- Application to Observations of Planet-hosting Stars -- An Exploration into the Radial-velocity Variability of the Sun -- Conclusion. 330 $aThis thesis develops new and powerful methods for identifying planetary signals in the presence of ?noise? generated by stellar activity, and explores the physical origin of stellar intrinsic variability, using unique observations of the Sun seen as a star. In particular, it establishes that the intrinsic stellar radial-velocity variations mainly arise from suppression of photospheric convection by magnetic fields. With the advent of powerful telescopes and instruments we are now on the verge of discovering real Earth twins in orbit around other stars. The intrinsic variability of the host stars themselves, however, currently remains the main obstacle to determining the masses of such small planets. The methods developed here combine Gaussian-process regression for modeling the correlated signals arising from evolving active regions on a rotating star, and Bayesian model selection methods for distinguishing genuine planetary signals from false positives produced by stellar magnetic activity. The findings of this thesis represent a significant step towards determining the masses of potentially habitable planets orbiting Sun-like stars. . 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aObservations, Astronomical 606 $aAstronomy?Observations 606 $aAstrophysics 606 $aSpace sciences 606 $aAstrobiology 606 $aAstronomy, Observations and Techniques$3https://scigraph.springernature.com/ontologies/product-market-codes/P22014 606 $aAstrophysics and Astroparticles$3https://scigraph.springernature.com/ontologies/product-market-codes/P22022 606 $aSpace Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics)$3https://scigraph.springernature.com/ontologies/product-market-codes/P22030 606 $aAstrobiology$3https://scigraph.springernature.com/ontologies/product-market-codes/P22057 615 0$aObservations, Astronomical. 615 0$aAstronomy?Observations. 615 0$aAstrophysics. 615 0$aSpace sciences. 615 0$aAstrobiology. 615 14$aAstronomy, Observations and Techniques. 615 24$aAstrophysics and Astroparticles. 615 24$aSpace Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). 615 24$aAstrobiology. 676 $a629.4113 700 $aHaywood$b Raphaëlle D$4aut$4http://id.loc.gov/vocabulary/relators/aut$0810055 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910254627203321 996 $aRadial-velocity Searches for Planets Around Active Stars$91813420 997 $aUNINA