Non-Fiction Books:

Radial-velocity Searches for Planets Around Active Stars

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Paperback

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Radial-velocity Searches for Planets Around Active Stars by Raphaelle D. Haywood
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Description

This 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.

Author Biography

Raphaelle D. Haywood studied Physics at Imperial College London, UK, where she obtained her MSci degree in 2011. She went on to do her PhD in Astrophysics on the detection of Neptune- and Earth-mass exoplanets under the supervision of Prof. Andrew Collier Cameron at the University of St Andrews, UK, where she recently graduated in fall 2015. She is now a postdoctoral fellow at Harvard College Observatory, working with Prof. David Charbonneau and his group, where she is pursuing her investigations on the magnetic variability of the Sun and other stars and pushing the magnetic activity barrier in exoplanet mass determinations ever further.
Release date Australia
May 30th, 2018
Country of Publication
Switzerland
Edition
Softcover reprint of the original 1st ed. 2016
Illustrations
57 Illustrations, color; 3 Illustrations, black and white; XV, 140 p. 60 illus., 57 illus. in color.
Imprint
Springer International Publishing AG
Pages
140
Dimensions
156x234x9
ISBN-13
9783319823102
Product ID
28254158

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