A5060407306- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- History and Developments in Astronomy
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
University of Geneva
2024
University of Padua
2022
Osservatorio Astronomico di Padova
2022
Abstract The two-planet transiting system LHS 1140 has been extensively observed since its discovery in 2017, notably with Spitzer, HST, TESS, and ESPRESSO, placing strong constraints on the parameters of M4.5 host star small temperate exoplanets, b c. Here, we reanalyze ESPRESSO observations novel line-by-line framework designed to fully exploit radial velocity content a stellar spectrum while being resilient outlier measurements. improved velocities, combined updated parameters,...
Context . Ultra-hot Jupiters (UHJ) have emerged as ideal testbeds for new techniques studying exoplanet atmospheres. Only a limited number of them are currently well studied, however. Aims We search atmospheric constituents the UHJ WASP-178 b with two ESPRESSO transits. Additionally, we show parallel photometry that used to obtain updated and precise stellar, planetary, orbital parameters. Methods The transits obtained were analysed narrow-band transmission spectroscopy cross-correlation...
We search for atmospheric constituents the UHJ WASP-178 b with two ESPRESSO transits using narrow-band and cross-correlation techniques, focusing on detections of NaI, H$\alpha$, H$\beta$, H$\gamma$, MgI, FeI FeII. Additionally, we show parallel photometry used to obtain updated precise stellar, planetary orbital parameters. report resolved line NaI (5.5 5.4 $\sigma$), H$\alpha$ (13 H$\beta$ (7.1 tentatively MgI (4.6 $\sigma$). In cross-correlation, confirm detection (7.8 5.8 $\sigma$)...
High-resolution spectrographs open a detailed window onto the atmospheres of stars and planets. As number systems observed with different instruments grows, it is crucial to develop standard in analyzing spectral time series exoplanet transits occultations, for benefit reproducibility. Here, we introduce ANTARESS workflow, set methods aimed at processing high-resolution spectroscopy datasets robust way extracting accurate exoplanetary stellar spectra. While fast preliminary analysis can be...
High-resolution spectrographs open a detailed window onto the atmospheres of stars and planets. As number systems observed with different instruments grows, it is crucial to develop standard in analyzing spectral time series exoplanet transits occultations, for benefit reproducibility. Here, we introduce ANTARESS workflow, set methods aimed at processing high-resolution spectroscopy datasets robust way extracting accurate exoplanetary stellar spectra. While fast preliminary analysis can be...
The two-planet transiting system LHS 1140 has been extensively observed since its discovery in 2017, notably with $Spitzer$, HST, TESS, and ESPRESSO, placing strong constraints on the parameters of M4.5 host star small temperate exoplanets, b c. Here, we reanalyse ESPRESSO observations novel line-by-line framework designed to fully exploit radial velocity content a stellar spectrum while being resilient outlier measurements. improved velocities, combined updated parameters, consolidate our...
Early-type main-sequence pulsating stars such as δ Scuti variables are one of the least explored class targets in search for exoplanets. Pulsation timing (PT) is an alternative technique to most effective methods. It exploits light-travel-time effect (LTTE) infer presence additional massive bodies around a star by measuring periodic phase modulation its signal. PT has been extremely successful discovering and characterizing stellar binaries when it was applied high-precision light curves...
Early-type main-sequence pulsating stars such as \ds{} variables are one of the least explored class targets in search for exoplanets. Pulsation timing (PT) is an alternative technique to most effective methods. It exploits light-travel-time effect (LTTE) infer presence additional massive bodies around a star by measuring periodic phase modulation its signal. PT has been extremely successful discovering and characterizing stellar binaries when it was applied high-precision light curves over...