eprintid: 26834
rev_number: 14
eprint_status: archive
userid: 4561
dir: disk0/00/02/68/34
datestamp: 2019-07-30 09:36:24
lastmod: 2019-08-15 08:44:31
status_changed: 2019-07-30 09:36:24
type: doctoralThesis
metadata_visibility: show
creators_name: Tala Pinto, Marcelo Said
title: Perspectives of the Radial Velocity Method: Physical Modeling of the Wavelength Solution & Exoplanetary Detections around Giant Stars
subjects: ddc-520
divisions: i-130001
adv_faculty: af-13
cterms_swd: Astronomisches Instrument
cterms_swd: Planetensystem
cterms_swd: Landessternwarte Königstuhl
abstract: First, I present the design and construction of the Front-end of the Waltz Spectrograph. I designed upgrades in the system to optimize its mechanical stability and light coupling efficiency. To improve the instrument performance, I changed the original spectrograph fiber for one with slightly larger core and better focal ratio degradation, providing a spectral resolving power of 60.000, a mean spectral sampling of 2.6 pixels and only 5% losses due to focal ratio degradation.
In the second part I present a ray tracing software that calculates the optical path of individual rays through an echelle spectrograph from the slit to the detector. By
including the effects of the environment on the physical properties of the optical elements that compose the spectrograph, I am able to reproduce some of the trends observed in the time series of the spectral line positions of the calibration data.
Finally, I report the discovery of two planets orbiting the stars HD 25723 and 17 Sco and two planet candidates orbiting 3 Cnc and 44 Uma. Also, I investigate the planet occurrence rates as a function of evolutionary stage for two surveys, Lick and EXPRESS, concluding that there is no strong effect of stellar evolution in planet occurrence rates.
date: 2019
id_scheme: DOI
id_number: 10.11588/heidok.00026834
ppn_swb: 167143708X
own_urn: urn:nbn:de:bsz:16-heidok-268345
date_accepted: 2019-07-16
advisor: HASH(0x55fc36add240)
language: eng
bibsort: TALAPINTOMPERSPECTIV2019
full_text_status: public
place_of_pub: Heidelberg
citation:   Tala Pinto, Marcelo Said  (2019) Perspectives of the Radial Velocity Method: Physical Modeling of the Wavelength Solution & Exoplanetary Detections around Giant Stars.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/26834/1/tesis_final_mtala.pdf