José I Vines
A5070646423- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Solar and Space Plasma Dynamics
- Space Exploration and Technology
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Pulsars and Gravitational Waves Research
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- Quantum optics and atomic interactions
- Mechanical and Optical Resonators
- Spacecraft Design and Technology
- Semiconductor Lasers and Optical Devices
- SAS software applications and methods
- Geometric Analysis and Curvature Flows
- Black Holes and Theoretical Physics
- Advanced Differential Geometry Research
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
University of Chile
2019-2024
Universidad Católica del Norte
2024
Millennium Institute of Astrophysics
2022
Centro de Astrofísica y Tecnologías Afines
2022
University of Arkansas at Fayetteville
2005
Accurately measuring stellar parameters is a key goal to increase our understanding of the observable universe. However, current methods are limited by many factors, in particular, biases and physical assumptions that basis for underlying evolutionary or atmospheric models, those these rely upon. Here we introduce code spectrAl eneRgy dIstribution bAyesian moDel averagiNg fittEr (ARIADNE), which tackles this problem using Bayesian Model Averaging incorporate information from all models...
We report the discovery of TOI 837b and its validation as a transiting planet. characterize system using data from NASA TESS mission, ESA Gaia ground-based photometry El Sauce ASTEP400, spectroscopy CHIRON, FEROS, Veloce. find that 837 is $T=9.9$ mag G0/F9 dwarf in southern open cluster IC 2602. The star planet are therefore $35^{+11}_{-5}$ million years old. Combining transit with prior on stellar parameters derived color-magnitude diagram, we has an orbital period $8.3\,{\rm d}$ slightly...
We report the discovery of a dark companion to 2MASS J15274848+3536572 with an orbital period 6.14 hr. Combining radial velocity from LAMOST observations and modelling multiband light curve, one obtains mass function $\simeq 0.131~\rm M_{\odot}$, inclination $45.20^\circ{}^{+0.13^{\circ}}_{-0.20^{\circ}}$, ratio $0.631^{+0.014}_{-0.003}$, which demonstrate binary nature $0.98 \pm 0.03\rm M_{\odot}$ main-sequence K9-M0 star $0.62 0.01~\rm M_{\odot}$. optical spectra at range phases reveal...
Context. Optical secondary eclipse measurements of small planets can provide a wealth information about the reflective properties these worlds, but are particularly challenging to attain because their relatively shallow depth. If such signals be detected and modeled, however, they planetary albedos, thermal characteristics, on absorbers in upper atmosphere. Aims. We aim detect characterize optical planet LTT 9779 b using CHaracterising ExOPlanet Satellite (CHEOPS) measure albedo search for...
The proliferation of exoplanet discoveries, particularly within such exotic environments as the Neptune desert, challenges our understanding planetary atmospheres undergoing intense irradiation. unexpected discovery an ultra-hot deep this desert offers a prime opportunity for in-depth atmospheric studies. This research builds upon previous observations LTT9779b from space-based telescopes, including Transiting Exoplanet Survey Satellite (TESS), Spitzer Space Telescope, and CHaracterising...
The proliferation of exoplanet discoveries in exotic environments like the Neptune desert challenges our understanding planetary atmospheres under intense irradiation. unexpected discovery LTT9779 b, an ultra-hot within this desert, offers a prime opportunity for atmospheric studies. We build on prior observations b from TESS, Spitzer, and CHEOPS, incorporating new VLT/ESPRESSO data to probe its dynamics. Preliminary analyses suggest metal-rich atmosphere high day-side geometric albedo,...
We present the discovery of NGTS-7Ab, a high mass brown dwarf transiting an M with period 16.2 hours, discovered as part Next Generation Transit Survey (NGTS). This is shortest around main or pre-main sequence star to date. The host (NGTS-7A) has age roughly 55 Myr and in state spin-orbit synchronisation, which we attribute tidal interaction acting spin up star. magnetically active shows multiple flares across NGTS follow lightcurves, use probe flare-starspot phase relation. also companion...
We report the period, eccentricity, and mass determination for TESS single-transit event candidate TOI-222, which displayed a single 3000 ppm transit in two-minute cadence data from Sector 2. determine orbital period via radial velocity measurements (P=33.9,days), allowed ground-based photometric detection of two subsequent transits. Our show that companion to TOI-222 is low star, with radius $0.18_{-0.10}^{+0.39}$ Rsun $0.23\pm0.01$ Msun. This discovery showcases ability efficiently...
We determine rotation periods for 127 stars in the ~115 Myr old Blanco 1 open cluster using ~200 days of photometric monitoring with Next Generation Transit Survey (NGTS). These span F5-M3 spectral types (1.2 $\gtrsim M \gtrsim$ 0.3 M$_{\odot}$) and increase number known by a factor four. three methods: Gaussian process (GP) regression, generalised autocorrelation (G-ACF) Lomb-Scargle (LS) periodograms, find that GPs G-ACF are more applicable to evolving spot modulation patterns. Between...
ABSTRACT We observed a transit of WASP-166 b using nine Next Generation Transit Survey (NGTS) telescopes simultaneously with the Transiting Exoplanet Satellite (TESS) observations same transit. achieved photometric precision 152 ppm per 30 min NGTS combined, matching reached by TESS for event around this bright (T = 8.87) star. The individual light-curve noise is found to be dominated scintillation and appears free from any time-correlated or correlation between telescope systems. fit data...
We report the discovery of NGTS-11 b (=TOI-1847 b), a transiting Saturn in 35.46-day orbit around mid K-type star (Teff=5050 K). initially identified system from single-transit event TESS full-frame image light-curve. Following seventy-nine nights photometric monitoring with an NGTS telescope, we observed second full transit approximately one year after event. The confirmed parameters signal and restricted orbital period to set 13 discrete periods. combined our detections precise radial...
The Transiting Exoplanet Survey Satellite, TESS, is currently carrying out an all-sky search for small planets transiting bright stars. In the first year of TESS survey, steady progress was made in achieving mission's primary science goal establishing bulk densities 50 smaller than Neptune. During that year, TESS's observations were focused on southern ecliptic hemisphere, resulting discovery three mini-Neptunes orbiting star TOI-125, a V=11.0 K0 dwarf. We present intensive HARPS radial...
Long-period transiting planets provide the opportunity to better understand formation and evolution of planetary systems. Their atmospheric properties remain largely unaltered by tidal or radiative effects host star, their orbital arrangement reflects a different, less extreme, migrational history compared close-in objects. The sample long-period exoplanets with well determined masses radii is still limited, but growing number objects reveal themselves in TESS data. Our goal vet confirm...
We present the discovery of two new 10-day period giant planets from Transiting Exoplanet Survey Satellite ($TESS$) mission, whose masses were precisely determined using a wide diversity ground-based facilities. TOI-481 b and TOI-892 have similar radii ($0.99\pm0.01$ $\rm R_{J}$ $1.07\pm0.02$ R_{J}$, respectively), orbital periods (10.3311 days 10.6266 days, but significantly different ($1.53\pm0.03$ M_{J}$ versus $0.95\pm0.07$ M_{J}$, respectively). Both orbit metal-rich stars ([Fe/H]=...
ABSTRACT We report the discovery of a brown dwarf orbiting M1 host star. first identified within Next Generation Transit Survey data, with supporting observations found in TESS sectors 11 and 38. confirmed follow-up photometry from South African Astronomical Observatory, SPECULOOS-S, TRAPPIST-S, radial velocity measurements HARPS, which allowed us to characterize system. find an orbital period ∼1.25 d, mass $69.0^{+5.3}_{-4.8}$ MJ, close hydrogen burning limit, radius 0.95 ± 0.05 RJ....
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....
ABSTRACT Vetting of exoplanet candidates in transit surveys is a manual process, which suffers from large number false positives and lack consistency. Previous work has shown that convolutional neural networks (CNN) provide an efficient solution to these problems. Here, we apply CNN classify planet the Next Generation Transit Survey (NGTS). For training data sets compare both real with injected planetary transits fully simulated data, as well how their different compositions affect network...
We report the discovery of a new ultra-short period transiting hot Jupiter from Next Generation Transit Survey (NGTS). NGTS-10b has mass and radius $2.162\,^{+0.092}_{-0.107}$ M$_{\rm J}$ $1.205\,^{+0.117}_{-0.083}$ R$_{\rm orbits its host star with $0.7668944\pm0.0000003$ days, making it shortest yet discovered. The is $10.4\pm2.5$ Gyr old K5V ($T_\mathrm{eff}$=$4400\pm100$\,K) Solar metallicity ([Fe/H] = $-0.02\pm0.12$\,dex) showing moderate signs stellar activity. joins short list...
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$11.5 m...
TOI-2202 b is a transiting warm Jovian-mass planet with an orbital period of P=11.91 days identified from the Full Frame Images data five different sectors TESS mission. Ten transits combined three follow-up light curves obtained CHAT robotic telescope show strong transit timing variations (TTVs) amplitude about 1.2 hours. Radial velocity FEROS, HARPS and PFS confirms planetary nature candidate (a$_{\rm b}$ = 0.096 $\pm$ 0.002 au, m$_{\rm 0.98 0.06 M$_{\rm Jup}$), dynamical analysis RVs,...
ABSTRACT In this paper, we present observations of two high-resolution transit data sets obtained with ESPRESSO the bloated sub-Saturn planet WASP-131 b. We have simultaneous photometric NGTS and EulerCam. addition, utilized light curves from TESS, WASP, EulerCam, TRAPPIST multiple transits to fit for planetary parameters update ephemeris. spatially resolve stellar surface utilizing Reloaded Rossiter McLaughlin technique search centre-to-limb convective variations, differential rotation,...
ABSTRACT HIP 41378 f is a temperate 9.2 ± 0.1 R⊕ planet with period of 542.08 d and an extremely low density 0.09 0.02 g cm−3. It transits the bright star (V = 8.93), making it exciting target for atmospheric characterization including transmission spectroscopy. was monitored photometrically between dates 2019 November 19 28. We detected transit NGTS, just third ever this planet, which confirms orbital period. This also first ground-based detection f. Additional photometry obtained used to...
ABSTRACT We present the discovery of NGTS-19b, a high-mass transiting brown dwarf discovered by Next Generation Transit Survey. investigate system using follow-up photometry from South African Astronomical Observatory, as well sector 11 Transiting Exoplanet Survey Satellite data, in combination with radial velocity measurements CORALIE spectrograph to precisely characterize system. find that NGTS-19b is companion K-star, mass $69.5 ^{+5.7}_{-5.4}$ MJup and radius $1.034...