Arianna Nigioni
A5094255565- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
University of Geneva
2024
Context . The HD 15337 (TIC 120896927, TOI-402) system was observed by the Transiting Exoplanet Survey Satellite (TESS), revealing presence of two short-period planets situated on opposite sides radius gap. This offers an excellent opportunity to study theories formation and evolution, as well investigate internal composition atmospheric evaporation. Aims We aim constrain structure valley: b c. use new transit photometry radial velocity data. Methods acquired 6 visits with CHaracterising...
We aim to constrain the internal structure and composition of HD 15337 b c, two short-period planets situated on opposite sides radius valley, using new transit photometry radial velocity data. acquire 6 visits with CHaracterising ExOPlanet Satellite (CHEOPS) 32 measurements from High Accuracy Radial Velocity Planet Searcher (HARPS) improve accuracy mass estimates for both planets. reanalyse light curves TESS sectors 3 4 analyse data sector 30, correcting long-term stellar activity....
In the last few decades planet search surveys have been focusing on solar type stars, and only recently high-mass regimes. This is mostly due to challenges arising from lack of instrumental precision, more importantly, inherent active nature fast rotating massive stars. Here we report NGTS-33b (TOI-6442b), a super-Jupiter with mass, radius orbital period 3.6 $\pm$ 0.3 M$_{\rm jup}$, 1.64 0.07 R$_{\rm jup}$ $2.827972 \pm 0.000001$ days, respectively. The host ($0.6654 0.0006$ day) hot...
Abstract In the last few decades planet search surveys have been focusing on solar type stars, and only recently high-mass regimes. This is mostly due to challenges arising from lack of instrumental precision, more importantly, inherent active nature fast rotating massive stars. Here we report NGTS-33b (TOI-6442b), a super-Jupiter with mass, radius orbital period 3.6 ± 0.3 Mj, 1.64 0.07 Rj 2.827972 0.000001 days, respectively. The host (0.6654 0.0006 day) hot (Teff = 7437 72 K) A9V star,...