Embedded Files
Here, I give a short illustrated summary of my curriculum vitae. The complete versions in English and French can be found below
I graduated from ISAE SUPAERO where I specialized in the conception of orbital systems and astrophysics. I spent the last year of this 3-year program in the Master of Science in Astrophysics, Space Science and Planetary Science (ASEP) of the University Toulouse III, where I studied, in particular, radiative transfer, formation and evolution of (exo-)planetary systems, planetary and stellar seismology, stellar physics and general relativity.
Before my master thesis, I decided to cycle from my own town, Strasbourg, to Nice in a fully-autonomous way, in 12 days. After 1100 km, 10 Alpine passes (including the horrific col de la Bonette, we finally reached our destination and appreciated a well-deserved sea bath. My next project is to cycle from Oslo to Tromsø, in Norway, but it will likely be a little colder (and longer).
I then started my master Thesis at the Geneva Observatory but rattached to the EPFL (Lausanne). Under the supervision of Prof. Jean-Paul Kneib, and Dr. Mathilde Jauzac, I analysed observations of three galaxy clusters with the integral-field spectrograph MUSE at the VLT. The goal was to refine the mass distribution of baryonic and dark matter estimated from HST images, by adding spectroscopic redshift measurements to already-identified objects and finding new multiple images of high-redshift galaxies. Find out more by reading the resulting paper: Jauzac, Klein et al., 2021.
I then started my PhD in November 2017 under the supervision of Dr. Jean-François Donati at the Institut de Recherche en Astrophysique et Planétologi (IRAP) and Université Toulouse III. During my PhD, I investigated how the high-precision velocimetric, spectrometric and spectropolarimetric capabilities of the instrument SPIRou to characterise the planetary systems around nearby red dwarfs and pre-main-sequence stars. Prior to the first SPIRou observations, in 2019, I conducted simulations of radial velocity monitoring of representative SPIRou targets, TRAPPIST-1 and K2-33 in order to assess the reliability of the planet detectability depending on stellar activity and observation strategy. This preliminary work enabled us to obtain SPIRou observations of the young planet-hosting star AU Mic from which we determined the mass of the close-in planet AU Mic b, which became the youngest planets with well-constrained inner density. More information about these works can be found HERE.
I also dedicated a substantial fraction of my PhD to the modelling of magnetic fields and activity phenomena at the surface of low-mass stars. Using Zeeman-Doppler Imaging, a technique inspired from medical imaging to image the distribution of large-scale magnetic field and brightness inhomogeneities at the surface of active stars from high-resolution polarized spectra, I co-investigated the connection be surface magnetic fields and activity phenomena on 4 different low-mass stars: the post-common envelope eclipsing binary V 471 Tau, the young pre-main-sequence star AU Mic, the early active M dwarf EPIC 21188923 (Klein et al. 2022, in prep.), and our neighbor, Proxima Centauri. More information can be found HERE.
Finally, I dedicated a few months of my PhD to the characterization of the atmosphere of transiting planets in near-infrared high-resolution spectroscopy. By working on SPIRou observations of transits of the well-known hot Jupiter HD 189733 b, I co-developped a framework to extract key properties of the exoplanet atmosphere such as its molecular composition (water, carbon monoxyde) and its Temperature-Pressure profile. This preliminary work partly led to the creation of a large consortium of French scientists, ATMOSPHERIX, including both observers and theoreticians, aimed at characterizing the atmosphere of a wide range of transiting planets using high-resolution near-infrared spectrographs. More information can be found HERE.
It is essential for me to communicate with the general public and participate to science outreach events. During my PhD, I joined the non-profit association UniverSCiel aimed at introducing young (and less young) children to the wonderful world of Astronomy, Astrophysics and Space Science. I co-organised two Astro-Jeunes festivals, in parallel of the Fleurance Astronomy festival (largest astronomy festival for the general public in France), each welcoming more than 200 chilren from 4 to 17. Among other things, I also gave seminars in two primary schools and one highschool, and co-represented IRAP at the nuit des chercheurs 2019 in Toulouse.
Since January 2022, I work as a post-doctoral research assistant at the sub-department of Astrophysics of the University of Oxford under the supervision of Prof. Suzanne Aigrain (GPRV ERC project). The goal of this project is to overcome stellar activity signals in radial velocity searches for exoplanets around Sun-like stars by working both on the time domain (i.e. time series) and the profusion of information available in the line profiles or the high-resolution spectra, i.e. in the wavelength domain. During my postdoctoral contract, I leverage my expertise in the analysis of spectroscopic signatures induced by stellar activity to implement new methods, either data-driven (e.g., in the Gaussian Process or SCALPELS frameworks) or more physically-motivated (e.g. Zeeman-Doppler Imaging). Our own Sun, which has been intensively monitored at high precision since 2015 with the HARPS-N solar telescope, is the ideal laboratory to test and validate such methods. I'm also involved in the Terra Hunting Experiment aimed at using the state-of-the-art instrument HARPS-3 for long term velocimetric follow-up of solar analogs to search for Earth twins.
Page updated
Google Sites
Report abuse