In this thesis I present my PhD activities concerning the development of simulation tools both for ground-based high resolution spectrograph design, ESPRESSO and ELT-HIRES, and for scientific investigations in the field of exoplanetary high-dispersion transmission spectroscopy. In the ESPRESSO (the Echelle SPectrograph for Rocky Exoplanets Super Stable Observations) project, the instrument modeling through ray-tracing bsoftware and ad-hoc developed sensivity analysis tool were fruitfully used for component optimization and alignment verification. In the framework of the ELT-HIRES (the HIgh REsolution Spectrograph for the ELT) project, an End-to-End simulator and a parametric paraxial model of the spectrograph were developed with the purpose to evaluate the different effects which can affect the final instrument performances, since they directly influence the scientific data observational performances. The synthetic echellogram (raw frame) produced and successfully processed by the CRIRES+ instrument data reduction pipeline are presented, thus probing the full chain feasibility and consistency of the system. Large telescopes allowing very high contrast, could also imply the possibility to detect the light emitted from background sources and/or from gravitationally bounded companion of exoplanetary system, which could act as signal contamination. A transmission spactra simulator, a tool aimed at generating synthetic spectra, was developed and used to show that the maximum contamination occurs for background stars of G-to-M type, even though for high resolution spectra with a 4m class telescope this contamination seems to not introduce obvious shifts or line broadening in the exoplanet atmospheric features.

Towards the Extremely Large Telescopes era in exoplanetary science: simulation tools, instrumental optimization and design for high resolution spectroscopy. The cases of ESPRESSO and ELT-HIRES / Genoni, Matteo. - (2018).

Towards the Extremely Large Telescopes era in exoplanetary science: simulation tools, instrumental optimization and design for high resolution spectroscopy. The cases of ESPRESSO and ELT-HIRES.

Genoni, Matteo
2018-01-01

Abstract

In this thesis I present my PhD activities concerning the development of simulation tools both for ground-based high resolution spectrograph design, ESPRESSO and ELT-HIRES, and for scientific investigations in the field of exoplanetary high-dispersion transmission spectroscopy. In the ESPRESSO (the Echelle SPectrograph for Rocky Exoplanets Super Stable Observations) project, the instrument modeling through ray-tracing bsoftware and ad-hoc developed sensivity analysis tool were fruitfully used for component optimization and alignment verification. In the framework of the ELT-HIRES (the HIgh REsolution Spectrograph for the ELT) project, an End-to-End simulator and a parametric paraxial model of the spectrograph were developed with the purpose to evaluate the different effects which can affect the final instrument performances, since they directly influence the scientific data observational performances. The synthetic echellogram (raw frame) produced and successfully processed by the CRIRES+ instrument data reduction pipeline are presented, thus probing the full chain feasibility and consistency of the system. Large telescopes allowing very high contrast, could also imply the possibility to detect the light emitted from background sources and/or from gravitationally bounded companion of exoplanetary system, which could act as signal contamination. A transmission spactra simulator, a tool aimed at generating synthetic spectra, was developed and used to show that the maximum contamination occurs for background stars of G-to-M type, even though for high resolution spectra with a 4m class telescope this contamination seems to not introduce obvious shifts or line broadening in the exoplanet atmospheric features.
2018
Exoplanets, radial velocity, transmission spectroscopy, Very Large Telescope, Extremely Large Telescope, high resolution spectrographs, End-to-End simulators, cloud computing
Towards the Extremely Large Telescopes era in exoplanetary science: simulation tools, instrumental optimization and design for high resolution spectroscopy. The cases of ESPRESSO and ELT-HIRES / Genoni, Matteo. - (2018).
File in questo prodotto:
File Dimensione Formato  
PhD_Thesis_GenoniMatteo_competa.pdf

accesso aperto

Descrizione: testo completo tesi
Tipologia: Tesi di dottorato
Licenza: Non specificato
Dimensione 25.13 MB
Formato Adobe PDF
25.13 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2090636
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact