J. Serrano Bell
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View article: ATREIDES
ATREIDES Open
The distribution of close-in exoplanets is shaped by a complex interplay between atmospheric and dynamical processes. The Desert, Ridge, and Savanna (respectively a lack, overoccurence, and mild deficit of Neptunes with increasing periods)…
View article: Chromaticity of stellar activity in radial velocities
Chromaticity of stellar activity in radial velocities Open
Context . In the search for exoplanets using radial velocities (RV), stellar activity has become one of the main limiting factors for detectability. Fortunately, activity-induced RV signals are wavelength-dependent or chromatic, unlike pla…
View article: Characterizing planetary systems with SPIRou: Detection of a sub-Neptune in a 6-day period orbit around the M dwarf Gl 410
Characterizing planetary systems with SPIRou: Detection of a sub-Neptune in a 6-day period orbit around the M dwarf Gl 410 Open
Context . The search for exoplanets around nearby M dwarfs represents a crucial milestone in the census of planetary systems in the vicinity of our Solar System. Aims . Since 2018 our team has been conducting a blind search program for pla…
View article: Time-resolved absorption of six chemical species with MAROON-X points to a strong drag in the ultra-hot Jupiter TOI-1518 b
Time-resolved absorption of six chemical species with MAROON-X points to a strong drag in the ultra-hot Jupiter TOI-1518 b Open
Context . Wind dynamics play a pivotal role in governing transport processes within planetary atmospheres, influencing atmospheric chemistry, cloud formation, and the overall energy budget. Understanding the strength and patterns of winds …
View article: TOI-5108 b and TOI 5786 b: Two transiting sub-Saturns detected and characterized with TESS, MaHPS, and SOPHIE
TOI-5108 b and TOI 5786 b: Two transiting sub-Saturns detected and characterized with TESS, MaHPS, and SOPHIE Open
We report the discovery and characterization of two sub-Saturns from the Transiting Exoplanet Survey Satellite ( TESS ) using high- resolution spectroscopic observations from the MaHPS spectrograph at the Wendelstein Observatory and the SO…
View article: Characterization of seven transiting systems, including four warm Jupiters from SOPHIE and TESS
Characterization of seven transiting systems, including four warm Jupiters from SOPHIE and TESS Open
While several thousand exoplanets are now confirmed, the number of known transiting warm Jupiters (10 d < period < 200 d) remains relatively small. These planets are generally believed to have formed outside the snowline and migrated to th…
View article: Characterization of seven transiting systems including four warm Jupiters from SOPHIE and TESS
Characterization of seven transiting systems including four warm Jupiters from SOPHIE and TESS Open
We present the study of seven systems, three of which TOI-2295, TOI-2537, and TOI-5110 are newly discovered planetary systems. Through the analysis of TESS photometry, SOPHIE radial velocities, and high-spatial resolution imaging, we found…
View article: GI 725A b: A potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc
GI 725A b: A potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc Open
We report the discovery of a super-Earth candidate orbiting the nearby mid-M dwarf Gl 725A using the radial velocity (RV) method. The planetary signal has been independently identified using high-precision RVs from the SOPHIE and SPIRou sp…
View article: Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc
Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc Open
We report the discovery of a super-Earth candidate orbiting the nearby mid M dwarf Gl\,725A using the radial velocity (RV) method. The planetary signal has been independently identified using high-precision RVs from the SOPHIE and SPIRou s…
View article: Surviving in the Hot-Neptune Desert: The Discovery of the Ultrahot Neptune TOI-3261b
Surviving in the Hot-Neptune Desert: The Discovery of the Ultrahot Neptune TOI-3261b Open
The recent discoveries of Neptune-sized ultra-short-period planets (USPs) challenge existing planet formation theories. It is unclear whether these residents of the Hot Neptune Desert have similar origins to smaller, rocky USPs, or if this…
View article: Surviving in the Hot Neptune Desert: The Discovery of the Ultra-Hot Neptune TOI-3261b
Surviving in the Hot Neptune Desert: The Discovery of the Ultra-Hot Neptune TOI-3261b Open
The recent discoveries of Neptune-sized ultra-short period planets (USPs) challenge existing planet formation theories. It is unclear whether these residents of the Hot Neptune Desert have similar origins to smaller, rocky USPs, or if this…
View article: TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS
TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS Open
We report the characterization of two planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods of 3.7 and 4.6 days, respectively. Follow-up observations for both targets, which…
View article: TOI-908: a planet at the edge of the Neptune desert transiting a G-type star
TOI-908: a planet at the edge of the Neptune desert transiting a G-type star Open
We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28, and 39. TOI-908 is a T = 10.7 mag G-dwarf (Teff = 5626 ± 61 K) solar-like star with a mass of 0.950 ± 0.010 M⊙ and …
View article: TOI-908: a planet at the edge of the Neptune desert transiting a G-type star
TOI-908: a planet at the edge of the Neptune desert transiting a G-type star Open
We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28 and 39. TOI-908 is a T = 10.7 mag G-dwarf ($T_{eff}$ = 5626 $\pm$ 61 K) solar-like star with a mass of 0.950 $\pm$ 0…
View article: TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter
TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter Open
Context. The current architecture of a given multi-planetary system is a key fingerprint of its past formation and dynamical evolution history. Long-term follow-up observations are key to complete their picture. Aims. In this paper, we foc…
View article: TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter
TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter Open
The current architecture of a given multi-planetary system is a key fingerprint of its past formation and dynamical evolution history. Long-term follow-up observations are key to complete their picture. In this paper we focus on the confir…
View article: Estudio de los efectos sistemáticos de SOPHIE+ con algoritmos de aprendizaje automático
Estudio de los efectos sistemáticos de SOPHIE+ con algoritmos de aprendizaje automático Open
SOPHIE+ is a echelle spectrograph located in Haute-Provence Observatory, France. It can reach a precision of near 1 m s$^{-1}$ by simultaneus calibration. However, the zero point shows a low frequency drift of a few m s$^{-1}$ that must be…