P. Cortés-Zuleta
A5061106865- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- High-pressure geophysics and materials
- Space Exploration and Technology
- Optical Polarization and Ellipsometry
- Spectroscopy and Laser Applications
- Astronomical and nuclear sciences
- Adaptive optics and wavefront sensing
- Molecular Spectroscopy and Structure
- Molecular spectroscopy and chirality
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Planetary Science and Exploration
- Calibration and Measurement Techniques
Aix-Marseille Université
2021-2024
Centre National de la Recherche Scientifique
2021-2024
University of St Andrews
2024
Laboratoire d’Astrophysique de Marseille
2021-2024
Château Gombert
2023
University of Chile
2017-2020
Yale University
2020
Precise measurements of chemical abundances in planetary atmospheres are necessary to constrain the formation histories exoplanets. A recent study WASP-127b, a close-in puffy sub-Saturn orbiting its solar-type host star 4.2 d, using HST and Spitzer revealed feature-rich transmission spectrum with strong excess absorption at 4.5 um. However, limited spectral resolution coverage these instruments could not distinguish between CO and/or CO2 causing this signal, both low high C/O ratio scenarios...
Exploring the properties of exoplanets near or inside radius valley provides insights on transition from rocky super-Earths to larger, hydrogen-rich atmosphere mini-Neptunes. Here, we report discovery TOI-1452 b, a transiting super-Earth ($R_{\rm p} = 1.67 \pm 0.07$ R$_{\oplus}$) in an 11.1--day temperate orbit ($T_{\rm eq} 326 7$ K) around primary member ($H 10.0$, $T_{\rm eff} 3185 50$ nearby visual binary M dwarf. The transits were first detected by TESS, then successfully isolated...
Context. The rotation period of stars is an important parameter along with mass, radius, effective temperature. It essential for any radial velocity monitoring, as stellar activity can mimic the presence a planet at period. Several methods exist to measure it, including long sequences photometric measurements or temporal series indicators. Aims. Here, we use circular polarization in near-infrared spectral lines sample 43 quiet M dwarfs and compare measured periods those obtained other...
ABSTRACT HIP 9618 (HD 12572, TOI-1471, TIC 306263608) is a bright (G = 9.0 mag) solar analogue. TESS photometry revealed the star to have two candidate planets with radii of 3.9 ± 0.044 R⊕ (HIP b) and 3.343 0.039 c). While 20.77291 d period b was measured unambiguously, c showed only transits separated by 680-d gap in time series, leaving many possibilities for period. To solve this issue, CHEOPS performed targeted aliases attempt recover true planet c, successfully determined be 52.56349 d....
We report the detection and characterization of transiting sub-Neptune TOI-1759 b, using photometric time series from Transiting Exoplanet Survey Satellite (TESS) near-infrared spectropolarimetric data Spectro-Polarimètre Infra Rouge (SPIRou) on Canada-France-Hawaii Telescope. b orbits a moderately active M0V star with an orbital period 18.849975 ± 0.000006 days, we measured planetary radius mass 3.06 0.22 R ⊕ 6.8 2.0 M . Radial velocities were extracted SPIRou spectra both cross-correlation...
Context: The search for extrasolar planets around the nearest M dwarfs is a crucial step towards identifying Earth-like planets. One of main challenges in this that can be magnetically active and stellar activity produce radial velocity (RV) signals could mimic those planet. Aims: We aim to investigate whether 2.2 day period observed optical RVs nearby dwarf star Gl 388 (AD Leo) due or planet corotates with as suggested past. Methods: obtained quasi-simultaneous from 2019 2021 SOPHIE (R~75k)...
Abstract We present the discovery of an 18.5 ± 0.5 M Jup brown dwarf (BD) companion to M0V star TOI–1278. The system was first identified through a percent-deep transit in Transiting Exoplanet Survey Satellite photometry; further analysis showed it be grazing Jupiter-sized object. Radial velocity (RV) follow-up with SPIRou near-infrared high-resolution velocimeter and spectropolarimeter framework 300-night Legacy carried out at Canada–France–Hawaii Telescope led detection Keplerian RV signal...
The stellar activity of M dwarfs is the main limitation for discovering and characterizing exoplanets orbiting them since it induces quasi-periodic RV variations. We aim to characterize magnetic field early, moderately active, dwarf Gl205 in optical nIR domains. obtained high-precision quasi-simultaneous spectra with SOPHIE spectrograph SPIRou spectropolarimeter between 2019 2022. computed RVs from both instruments Stokes V profiles. used ZDI map large-scale over time span observations....
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD 88986 b, potentially transiting sub-Neptune, possessing longest period known small (<4 R ⊕ ) precise mass measurement ( σ M /M > 25%). Additionally, identified presence massive companion in wider orbit...
ABSTRACT Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and predicted by theoretical structure models. This ‘radius inflation’ problem could an impact on both exoplanetary science. We present the final results our observation programme with CHaracterising ExOPlanet Satellite (CHEOPS) to obtain high-precision light curves eclipsing binaries companions (EBLMs). Combined spectroscopic orbits solar-type companions, we can derive masses, radii,...
The Neptune desert is a feature seen in the radius-mass-period plane, whereby notable dearth of short period, Neptune-like planets found. Here we report {\it TESS} discovery new short-period planet desert, orbiting G-type dwarf TYC\,8003-1117-1 (TOI-132). photometry shows transit-like dips at level $\sim$1400 ppm occurring every $\sim$2.11 days. High-precision radial velocity follow-up with HARPS confirmed planetary nature transit signal and provided semi-amplitude variation $\sim$11.5 m...
The radial velocity method is amongst the most robust and established means of detecting exoplanets. Yet, it has so far failed to detect circumbinary planets despite their relatively high occurrence rates. Here, we report velocimetric measurements Kepler-16A, obtained with SOPHIE spectrograph, at Observatoire de Haute-Provence's 193cm telescope, collected during BEBOP survey for planets. Our mark first detection a planet, independently determining mass Kepler-16~(AB)~b be $0.313 \pm...
We report the discovery of TOI-4127 b, a transiting, Jupiter-sized exoplanet on long-period ($P = 56.39879^{+0.00010}_{-0.00010}$ d), high-eccentricity orbit around late F-type dwarf star. This warm Jupiter was first detected and identified as promising candidate from search for single-transit signals in TESS Sector 20 data, later characterized planet following two subsequent transits (TESS Sectors 26 53) follow-up ground-based RV observations with NEID SOPHIE spectrographs. jointly fit...
Planetary systems around solar analogs inform us about how planets form and evolve in Solar System-like environments. We report the detection characterization of two planetary TOI-1736 TOI-2141 using TESS photometry data spectroscopic obtained with SOPHIE instrument on 1.93 m telescope at Observatoire de Haute-Provence (OHP). performed a detailed analysis these to obtain precise radial velocities (RV) physical properties their host stars. each transiting sub-Neptune radii $2.44\pm0.18$...
We present the discovery of two small planets transiting HD 93963A (TOI-1797), a G0\,V star (M$_*$=1.109\,$\pm$\,0.043\,M$_\odot$, R$_*$=1.043\,$\pm$\,0.009\,R$_\odot$) in visual binary system. combined TESS and CHEOPS space-borne photometry with data from MuSCAT 2, `Alopeke, PHARO, TRES, FIES, SOPHIE. validated spectroscopically confirmed outer planet 93963 Ac, sub-Neptune an orbital period P$_c \approx$ 3.65 d, reported as object interest (TOI) shortly after release Sector 22 data. Ac has...
We report the discovery and characterization of transiting extrasolar planet TOI-1710$\:$b. It was first identified as a promising candidate by Transiting Exoplanet Survey Satellite (TESS). Its planetary nature then established with SOPHIE HARPS-N spectroscopic observations via radial-velocity method. The stellar parameters for host star are derived from spectra joint Markov chain Monte-Carlo (MCMC) adjustment spectral energy distribution evolutionary tracks TOI-1710. A MCMC analysis TESS...
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...
Previous studies have shown that the incidence rate of intervening strong Mg ii absorbers towards gamma-ray bursts (GRBs) were a factor 2–4 higher than quasars. Exploring similar sized and uniformly selected legacy data sets XQ-100 XSGRB, each consisting 100 quasar 81 GRB afterglow spectra obtained with single instrument (VLT/X-shooter), we demonstrate there is no disagreement in number density rest-frame equivalent widths \hbox{$W_{\rm r}^{\lambda2796}>1$} Å towardsGRBs quasars redshift...
Distinguishing classes within substellar objects and understanding their formation evolution need larger samples of companions such as exoplanets, brown dwarfs, low-mass stars. In this paper, we look for using radial velocity surveys FGK stars with the SOPHIE spectrograph at Observatoire de Haute-Provence. We assign here variations 27 to orbital motion induced by companions. also constrained plane-of-the-sky HIPPARCOS Gaia Data Release 1 measurements, which constrain true masses some these...
We present the discovery and characterization of a transiting sub-Neptune orbiting with 16.20 day period around nearby (28 pc) bright(V=8.37) K0V star HD207897 (TOI-1611). This is based on photometric measurements from Transiting Exoplanet Survey Satellite(TESS) mission radial velocity (RV) observations SOPHIE, Automated Planet Finder (APF) HIRES high precision spectrographs. used EXOFASTv2 for simultaneously modeling parameters planet its host star, combining RV data to determine planetary...
Context: The bulk of the Molecular gas in Central Zone (CMZ) Galactic center region shows warm kinetic temperatures, ranging from $>20$ K coldest and densest regions (n$\sim 10^{4-5}$ cm$^{-3}$) up to more than 100 for densities about n$\sim 10^3$ cm$^{-3}$. Recently, a diffuse, hotter ($n \sim 100$ cm$^{-3}$, $T\sim 250$ K) component was discovered through absorption observations H$_3^+$. This may be widespread center, low density detectable present even outside CMZ along sightlines...
In this paper we report the discovery of TOI-220 $b$, a new sub-Neptune detected by Transiting Exoplanet Survey Satellite (TESS) and confirmed radial velocity follow-up observations with HARPS spectrograph. Based on combined analysis TESS transit photometry high precision measurements estimate planetary mass 13.8 $\pm$ 1.0 M$_{Earth}$ radius 3.03 0.15 R$_{Earth}$, implying bulk density 2.73 0.47 $\textrm{g cm}^{-3}$. $b$ orbits relative bright (V=10.4) old (10.1$\pm$1.4 Gyr) K dwarf star...
SPIRou is a near-infrared spectropolarimeter and high-precision velocimeter. The Legacy Survey collected data from February 2019 to June 2022, half of the time devoted blind search for exoplanets around nearby cool stars. aim this paper present program an overview its properties, revisit radial velocity (RV) two multiplanet systems, including new visits with SPIRou. From data, we can extract precise RVs using efficient telluric correction line-by-line measurement techniques, reconstruct...
We report on the discovery and validation of a transiting long-period mini-Neptune orbiting bright (V = 9.0 mag) G dwarf (TOI 4633; R 1.05 RSun, M 1.10 MSun). The planet was identified in data from Transiting Exoplanet Survey Satellite by citizen scientists taking part Planet Hunters TESS project. Modeling transit events yields an orbital period 271.9445 +/- 0.0040 days radius 3.2 0.20 REarth. Earth-like incident flux 1.56 0.2 places it optimistic habitable zone around star. Doppler...