P. Montañés‐Rodríguez
A5114376785- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Space Science and Extraterrestrial Life
- Atmospheric aerosols and clouds
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Isotope Analysis in Ecology
- Climate variability and models
- Solar and Space Plasma Dynamics
- Spectroscopy and Laser Applications
- Calibration and Measurement Techniques
- Leprosy Research and Treatment
- Astronomical and nuclear sciences
- Scientific Research and Discoveries
- Pulmonary Hypertension Research and Treatments
- CCD and CMOS Imaging Sensors
- Spacecraft and Cryogenic Technologies
Instituto de Astrofísica de Canarias
2013-2024
Universidad Europea de Canarias
2024
Universidad de La Laguna
2012-2021
Armagh Observatory & Planetarium
2000-2021
Consejo Superior de Investigaciones Científicas
2007-2019
The University of Tokyo
2018
New Jersey Institute of Technology
2003-2006
Bear Valley
2006
Hospital Universitario Miguel Servet
2005
California Institute of Technology
2004
Factors predicting life expectancy in primary pulmonary hypertension have not been well defined. Thirty four cases of that had followed up until death or for at least five years were reviewed retrospectively. Patients divided into three groups: 18 patients who died within presentation to hospital; 12 survived more than years; and improved lived years. The age onset was similar the groups and, like symptoms sex, did predict expectancy. Right heart failure during course disease associated with...
Ultra hot Jupiters orbit very close to their host star and consequently receive strong irradiation that makes atmospheric chemistry different from the common gas giants. Here, we study atmosphere of one these particular planets, MASCARA-2b/KELT-20b, using four transit observations with high resolution spectroscopy facilities. Three were performed HARPS-N CARMENES. We simultaneously observed transits MuSCAT2 monitor possible spots in stellar surface. At resolution, transmission residuals show...
We report the detection of a transiting Earth-size planet around GJ 357, nearby M2.5 V star, using data from Transiting Exoplanet Survey Satellite (TESS). 357 b (TOI-562.01) is transiting, hot, Earth-sized ( T eq = 525 ± 11 K) with radius R 1.217 0.084 ⊕ and an orbital period P 3.93 d. Precise stellar radial velocities CARMENES PFS, as well archival HIRES, UVES, HARPS also display 3.93-day periodicity, confirming planetary nature leading to mass M 1.84 0.31 . In addition velocity signal for...
It has been posited that lunar eclipse observations may help predict the in-transit signature of Earth-like extrasolar planets. However, a comparative analysis two phenomena addressing in detail transport stellar light through planet's atmosphere not yet presented. Here, we proceed with investigation both by making use common formulation. Our starting point is set previously unpublished near-infrared spectra collected at various phases during August 2008 eclipse. We then take formulation to...
We present the discovery of a transiting exoplanet candidate in K2 Field-1 with an orbital period 9.1457 hr: K2-22b. The highly variable transit depths, ranging from $\sim$0\% to 1.3\%, are suggestive planet that is disintegrating via emission dusty effluents. characterize host star as M-dwarf $T_{\rm eff} \simeq 3800$ K. have obtained ground-based measurements several 1-m class telescopes and GTC. These observations (1) improve ephemeris; (2) confirm nature depths; (3) indicate variations...
We report on the confirmation and mass determination of Pi Men c, first transiting planet discovered by NASA's TESS space mission. is a naked-eye (V=5.65 mag), quiet G0 V star that was previously known to host sub-stellar companion (Pi b) long-period (Porb = 2091 days), eccentric (e 0.64) orbit. Using time-series photometry, combined with Gaia data, published UCLES@AAT Doppler measurements, archival HARPS@ESO-3.6m radial velocities, we found c close-in an orbital period Porb 6.27 days, Mc...
With the recent discoveries of hundreds extrasolar planets, search for planets like Earth and life in universe, is quickly gaining momentum. In future, large space observatories could directly detect light scattered from rocky but they would not be able to spatially resolve a planet's surface. Using reflectance models real cloud data satellite observations, here we show that, despite Earth's dynamic weather patterns, by hypothetical distant observer as function time contains sufficient...
A series of missions will be launched over the next few decades that designed to detect and characterize extrasolar planets around nearby stars. These search for habitable environments signs life (biosignatures) in planetary spectra. The vegetation's "red edge," an enhancement Earth's spectrum near 700 nm when sunlight is reflected from greenery, often suggested as a tool terrestrial-like planets. Here, through ground-based observations spectrum, satellite clouds, advanced atmospheric...
Abstract Only a few hot Jupiters are known to orbit around fast rotating stars. These exoplanets harder detect and characterize may be less common than slow rotators. Here, we report the discovery of transiting Jupiter XO-6b, which orbits bright, hot, star: V = 10.25, T eff⋆ 6720 ± 100 K, v sin i ⋆ 48 3 km s −1 . We detected planet from its transits using XO instruments conducted follow-up campaign. Because stellar rotation, radial velocities taken along do not yield planet’s mass with high...
We present the discovery and characterisation of two transiting planets observed by Transiting Exoplanet Survey Satellite (TESS) orbiting nearby (d ~ 22 pc), bright (J 9 mag) M3.5 dwarf LTT 3780 (TOI-732). confirm both their association with via ground-based photometry determine masses using precise radial velocities measured CARMENES spectrograph. Precise stellar parameters determined from high resolution spectra that is a mid-M an effective temperature T_eff = 3360 +\- 51 K, surface...
We present a detailed analysis of HARPS-N radial velocity observations K2-100, young and active star in the Praesepe cluster, which hosts transiting planet with period 1.7 days. model activity-induced variations host multi-dimensional Gaussian Process framework detect planetary signal $10.6 \pm 3.0 {\rm m\,s^{-1}}$, matches transit ephemeris, translates to mass $21.8 6.2 M_\oplus$. perform suite validation tests confirm that our detected is genuine. This first measurement for open cluster....
Abstract The reflectance of the Earth is a fundamental climate parameter that we measured from Big Bear Solar Observatory between 1998 and 2017 by observing earthshine using modern photometric techniques to precisely determine daily, monthly, seasonal, yearly decadal changes in terrestrial albedo earthshine. We find inter‐annual fluctuations be global, while large variations within individual nights seasonal wanderings tend average out over each year. measure gradual, but climatologically...
We correlate an overlapping period of earthshine measurements Earth's reflectance (from 1999 through mid-2001) with satellite observations global cloud properties to construct from the latter a proxy measure shortwave reflectance. This shows steady decrease in 1984 2000, strong climatologically significant drop after 1995. From 2001 2003, only data are available, and they indicate complete reversal decline. Understanding how causes these decadal changes apportioned between natural...
We have been making sustained observations of the earthshine from Big Bear Solar Observatory in California since late 1998. also intermittent 1994–1995. reinvigorated and modernized a nearly forgotten way measuring Earth's albedo, hence its energy balance, previously studied by A. Danjon his followers for about 25 years early last century using their France. This is first series papers covering simulations reflectance photometric spectral Moon. Here, we develop modern method measuring,...
Ongoing searches for exoplanetary systems have revealed a wealth of planets with diverse physical properties. Planets even smaller than the Earth already been detected and efforts future missions are aimed at discovery, perhaps characterization, small rocky exoplanets within habitable zone their stars. Clearly, what we know about our planet will be guideline characterization such planets. However, has inhabited least 3.8 Gyr its appearance changed time. Here, studied during Archean eon, 3.0...
We report the discovery of K2-31b, first confirmed transiting hot Jupiter detected by K2 space mission. combined photometry with FastCam lucky imaging and FIES HARPS high-resolution spectroscopy to confirm planetary nature object derived system parameters. K2-31b is a 1.8-Jupiter-mass planet on an 1.26-day-orbit around G7\,V star ($M_\star=0.91$~\Msun, $R_\star=0.78$~\Rsun). The radius poorly constrained (0.7$<$$R_\mathrm{p}$$<$1.4~\Rjup), owing grazing transit low sampling rate photometry.
We report the discovery of an intermediate-mass transiting brown dwarf, TOI-503b, from TESS mission. TOI-503b is first dwarf discovered by and orbits a metallic-line A-type star with period $P=3.6772 \pm 0.0001$ days. The light curve indicates that transits its host in grazing manner, which limits precision we measure dwarf's radius ($R_b = 1.34^{+0.26}_{-0.15} R_J$). obtained high-resolution spectroscopic observations FIES, Ondřejov, PARAS, Tautenburg, TRES spectrographs measured mass to be...
Since late 1998, we have been making sustained measurements of the Earth's reflectance by observing earthshine from Big Bear Solar Observatory. Further, simulated for both parts Earth in and whole Earth. The simulations employ scene models Radiation Budget Experiment, snow/ice cover, near‐real‐time satellite cloud cover data. Broadly, observations agree; however, there are important significant differences, with showing more muted variations. During rising phase Moon measure sunlit world to...