J. Serrano Bell
A5039049884- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Space Exploration and Technology
- Gamma-ray bursts and supernovae
- Crystal Structures and Properties
- High-pressure geophysics and materials
- Solid-state spectroscopy and crystallography
International Center for Advanced Studies
2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2024
National University of General San Martín
2024
Sorbonne Université
2024
Centre National de la Recherche Scientifique
2024
Institut d'Astrophysique de Paris
2024
Universidad Nacional de La Plata
2022-2023
We report the discovery and characterization of two sub-Saturns from Transiting Exoplanet Survey Satellite (\textit{TESS}) using high-resolution spectroscopic observations MaHPS spectrograph at Wendelstein Observatory SOPHIE Haute-Provence Observatory. Combining photometry TESS, KeplerCam, LCOGT, MuSCAT2 with radial velocity measurements we measure precise radii masses for both planets. TOI-5108 b is a sub-Saturn radius $6.6 \pm 0.1$ $R_\oplus$ mass $32 5$ $M_\oplus$. TOI-5786 similar to...
We report the discovery and characterization of two sub-Saturns from Transiting Exoplanet Survey Satellite ( TESS ) using high- resolution spectroscopic observations MaHPS spectrograph at Wendelstein Observatory SOPHIE Haute-Provence Observatory. Combining photometry TESS, KeplerCam, LCOGT, MuSCAT2, along with radial velocity measurements SOPHIE, we measured precise radii masses for both planets. TOI-5108 b is a sub-Saturn, radius 6.6 ± 0.1 R ⊕ mass 32 5 M . TOI-5786 similar to Saturn, 8.54...
Abstract The recent discoveries of Neptune-sized ultra-short-period planets (USPs) challenge existing planet formation theories. It is unclear whether these residents the Hot Neptune Desert have similar origins to smaller, rocky USPs, or if this discrete population evidence a different pathway altogether. We report discovery TOI-3261b, an ultrahot with orbital period P = 0.88 day. host star V 13.2 mag, slightly supersolar metallicity ([Fe/H] ≃0.15), inactive K1.5 main-sequence at d 300 pc....
The current architecture of a given multi-planetary system is key fingerprint its past formation and dynamical evolution history. Long-term follow-up observations are to complete their picture. In this paper we focus on the confirmation characterization components TOI-969 planetary system, where TESS detected Neptune-size planet candidate in very close-in orbit around late K-dwarf star. We use set precise radial velocity from HARPS, PFS CORALIE instruments covering more than two years...
We report the characterization of two planet candidates detected by Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods 3.7 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed transit events. High-precision radial velocities from SOPHIE spectrograph revealed signals at expected frequencies phases transiting allowed mass determinations a precision $8.4\%$ $6.7\%$ The planetary orbital...
ABSTRACT We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28, and 39. is a T = 10.7 mag G-dwarf (Teff 5626 ± 61 K) solar-like star with mass 0.950 0.010 M⊙ radius 1.028 0.030 R⊙. The planet, b, 3.18 0.16 R⊕ planet in d orbit. Radial velocity measurements HARPS reveal b has approximately 16.1 4.1 M⊕, resulting bulk planetary density $2.7^{+0.2}_{-0.4}$ g cm−3. lies sparsely populated region parameter space known as Neptune...
We report the characterization of two planet candidates detected by Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods 3.7 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed transit events. High-precision radial velocities from SOPHIE spectrograph revealed signals at expected frequencies phases transiting allowed mass determinations a precision 8.4% 6.7% The planetary orbital...
The recent discoveries of Neptune-sized ultra-short period planets (USPs) challenge existing planet formation theories. It is unclear whether these residents the Hot Neptune Desert have similar origins to smaller, rocky USPs, or if this discrete population evidence a different pathway altogether. We report discovery TOI-3261b, an ultra-hot with orbital $P$ = 0.88 days. host star $V 13.2$ magnitude, slightly super-solar metallicity ([Fe/H] $\simeq$ 0.15), inactive K1.5 main sequence at $d...
We report the discovery of a super-Earth candidate orbiting nearby mid M dwarf Gl\,725A using radial velocity (RV) method. The planetary signal has been independently identified high-precision RVs from SOPHIE and SPIRou spectrographs, in optical near-infrared domains, respectively. modelled stellar activity jointly with planet two Gaussian Processes, one for each instrument to account chromaticity instrumental systematics, along Keplerian model. is significantly detected RV semi-amplitude...
We report the discovery of a super-Earth candidate orbiting nearby mid-M dwarf Gl\,725A using radial velocity (RV) method. The planetary signal has been independently identified high-precision RVs from SOPHIE and SPIRou spectrographs, in optical near-infrared (NIR) domains, respectively. modelled stellar activity jointly with planet two Gaussian processes, one for each instrument to account chromaticity instrumental systematics, along Keplerian model. was significantly detected RV...
We present the study of seven systems, three which TOI-2295, TOI-2537, and TOI-5110 are newly discovered planetary systems. Through analysis TESS photometry, SOPHIE radial velocities, high-spatial resolution imaging, we found that TOI-2295b, TOI-2537b, TOI-5110b transiting warm Jupiters with orbital periods ranging from 30 to 94 d, masses between 0.9 2.9 MJ, radii 1.0 1.5 RJ. Both TOI-2295 TOI-2537 each harbor at least one additional, outer planet. Their planets TOI-2295c TOI-2537c...
While several thousand exoplanets are now confirmed, the number of known transiting warm Jupiters (10 d < period 200 d) remains relatively small. These planets generally believed to have formed outside snowline and migrated their current orbits. Because they sufficiently distant from host stars, mitigate proximity effects so offer valuable insights into planet formation evolution. Here, we present study seven systems, three which – TOI-2295, TOI-2537, TOI-5110 newly discovered planetary...
The current architecture of a given multi-planetary system is key fingerprint its past formation and dynamical evolution history. Long-term follow-up observations are to complete their picture. In this paper we focus on the confirmation characterization components TOI-969 planetary system, where TESS detected Neptune-size planet candidate in very close-in orbit around late K-dwarf star. We use set precise radial velocity from HARPS, PFS CORALIE instruments covering more than two years...
We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28 and 39. is a T = 10.7 mag G-dwarf ($T_{eff}$ 5626 $\pm$ 61 K) solar-like star with mass 0.950 0.010 $M_{\odot}$ radius 1.028 0.030 $R_{\odot}$. The planet, b, 3.18 0.16 $R_{\oplus}$ planet in day orbit. Radial velocity measurements HARPS reveal b has approximately 16.1 4.1 $M_{\oplus}$ , resulting bulk planetary density 2.7+0.2-0.4 g cm-3. lies sparsely-populated region...
SOPHIE+ is a echelle spectrograph located in Haute-Provence Observatory, France. It can reach precision of near 1 m s$^{-1}$ by simultaneus calibration. However, the zero point shows low frequency drift few that must be corrected to achieve needed for current exoplanet search programs. To this end, four radial velocity standard stars are monitored regularly measure instrumental drift. In work, we propose new way correct instruments like SOPHIE+. We use supervised machine learning techniques...