P. Marcos-Arenal
A5012243943- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Photocathodes and Microchannel Plates
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Photosynthetic Processes and Mechanisms
- Spacecraft Design and Technology
- Calibration and Measurement Techniques
- Spacecraft and Cryogenic Technologies
- CCD and CMOS Imaging Sensors
- Light effects on plants
- Photoreceptor and optogenetics research
- Historical Astronomy and Related Studies
- Spacecraft Dynamics and Control
- Molecular Spectroscopy and Structure
- Origins and Evolution of Life
- Adaptive optics and wavefront sensing
- Atmospheric and Environmental Gas Dynamics
- Paleontology and Stratigraphy of Fossils
- Historical and Architectural Studies
- Simulation Techniques and Applications
- Algal biology and biofuel production
- Environmental Monitoring and Data Management
European Space Astronomy Centre
2022-2024
Centro de Astrobiología
2021-2022
Instituto Nacional de Técnica Aeroespacial
2022
Universidad Complutense de Madrid
2012-2019
KU Leuven
2013-2015
The Euclid ERO showcase Euclid's capabilities in advance of its main mission by targeting 17 astronomical objects, including galaxy clusters, nearby galaxies, globular and star-forming regions. A total 24 hours observing time was allocated the early months operation, scientific community engaged through an public data release. We describe development pipeline to create visually compelling images while simultaneously meeting demands within launch leveraging a pragmatic data-driven strategy....
The unparalleled photometric data obtained by NASA's Kepler space telescope led to an improved understanding of red giant stars and binary stars. Seismology allows us constrain the properties giants. In addition eclipsing binaries, eccentric non-eclipsing exhibiting ellipsoidal modulations, have been detected with Kepler. We aim study systems containing a star derive parameters primary component. apply asteroseismic techniques determine masses radii component each system. For selected...
The Kepler space mission provided near-continuous and high-precision photometry of about 207,000 stars, which can be used for asteroseismology. However, successful seismic modelling it is equally important to have accurate stellar physical parameters. Therefore, supplementary ground-based data are needed. We report the results analysis high-resolution spectroscopic A- F-type stars from field, were obtained with HERMES spectrograph on Mercator telescope. determined spectral types, atmospheric...
Context. Herbig Ae/Be stars (HAeBes) have so far been studied based on relatively small samples that are scattered throughout the sky. Their fundamental stellar and circumstellar parameters statistical properties were derived with heterogeneous approaches before Gaia . Aims. Our main goal is to contribute study of HAeBes from largest sample such sources date, for which determined homogeneously analysis spectral energy distributions (SEDs) EDR3 parallaxes photometry. Methods. Multiwavelength...
Many aspects of the design trade-off a space-based instrument and its performance can best be tackled through simulations expected observations. The complex interplay various noise sources in course observations make such an indispensable part assessment study any mission. We present formalism to model simulate photometric time series CCD images by including models electronics, telescope optics, stellar field, jitter movements spacecraft, all important natural sources. This has been...
Context. Red giants are evolved stars that exhibit solar-like oscillations. Although a multitude of have been observed with space telescopes, only handful red giant were targets spectroscopic asteroseismic observing projects.
Context: OB stars are important in the chemistry and evolution of Universe, but sample targets well understood from an asteroseismological point view is still too limited to provide feedback on current evolutionary models. Our study extends this with two spectroscopic binary systems. AIMS. goal orbital solutions, fundamental parameters abundances disentangled high-resolution high signal-to-noise spectra, as analyse interpret variations Kepler light curve these carefully selected targets....
Low-mass pre-main-sequence stars, i.e., T Tauri stars (TTSs), strongly radiate at high energies, from X-rays to the ultraviolet (UV). This excess radiation with respect main-sequence cool (MSCSs) is associated accretion process, it produced in extended magnetospheres, shocks on stellar surface, and outflows. Although evidence of outflow contribution high-energy have been recently addressed, there not an updated revision magnetospheric contribution. article addresses this issue. The UV...
Pulsating stars in binary systems are ideal laboratories to test stellar evolution and pulsation theory, since a direct, model-independent determination of component masses is possible. The high-precision CoRoT photometry allows detailed view the frequency content pulsating stars, enabling detection patterns their distribution. object HD 51844 such case showing periastron brightening instead eclipses. We present comprehensive study system, where we derive physical parameters both components,...
Aims . Over the past decades, libraries of stellar spectra have been used in a large variety science cases, including as sources reference for given object or spectral type. Despite existence and increasing number projects large-scale surveys, there is to date only one very high-resolution library offering from few hundred objects southern hemisphere (UVES-POP). We aim extend sample, finer coverage effective temperatures surface gravity with uniform collection obtained northern hemisphere....
During its 6-year nominal mission, Euclid shall survey one third of the sky, enabling us to examine spatial distributions dark and luminous matter during past 10 Gyr cosmic history. The satellite was successfully launched on a SpaceX Falcon 9 launcher from Cape Canaveral 1 July 2023 is fully operational in halo orbit around Second Sun-Earth Lagrange point. We present an overview expected unexpected findings early phases context technological heritage lessons learnt. first months mission were...
Context. It has been hypothesized that the location of Herbig Ae/Be stars (HAeBes) within empirical relation between inner disk radius ( r in ), inferred from K -band interferometry, and stellar luminosity L * is related to presence innermost gas, disk-to-star accretion mechanism, dust properties spectral energy distributions (SEDs), or a combination these effects. However, no general observational confirmation provided date. Aims. This work aims test whether previously proposed hypotheses...
The WSO-UV project is an efficient multipurpose orbital observatory for high sensitivity imaging. imaging instrument Field Camera Unit (FCU) onboard will be the first UV camera to flown a geosynchronous orbit. planned operate at least five years and perhaps longer. open new opportunities in planetary science, stellar astrophysics, extragalactic astronomy cosmology. This paper provides information on updated FCU instrument.
In view of the existing controversy around origin photosynthesis and, therefore, first photosynthetic pigments, our work focuses on theoretical study a hypothetical pigment, simpler than those today, that collects energy from solar radiation Earth-like exoplanets. Our results show there could exist geochemical conditions allow abiotic formation primeval pigment might become sufficiently abundant in early stages habitable rocky These would place this before appearance life very young planet,...
Only a low percentage of the radiation from our Sun is captured by photosynthesis, but this conversion solar to chemical energy sustains all life on Earth. Photosynthesis could be present in any exoplanetary system fulfilling main three ingredients for metabolic route: light, water, and carbon dioxide. To deepen into idea, ExoPhot project aims study relation between photosynthetic systems exoplanet conditions around different types stars focusing two aspects: (i) Assessing fitness variety...
The preparation of a space-mission that carries out any kind imaging to detect high-precision low-amplitude variability its targets requires robust model for the expected performance instruments. This cannot be derived from simple addition noise properties due complex interaction between various sources. While it is not feasible build and test prototype device on-ground, realistic numerical simulations in form an end-to-end simulator can used propagation observations. These only allow...
Our goal is to perform in-depth ensemble asteroseismology of the young open cluster NGC2244 with 2-wheel Kepler mission. While nominal mission already implied a revolution in stellar physics for solar-type stars and red giants, it was not possible asteroseismic studies massive OB because such targets were carefully avoided FoV order disturb exoplanet hunting. Now an excellent time fill this hole capacity focus on metal factories Universe, which evolution theory least adequate. white paper...
The World Space Observatory Ultraviolet telescope is equipped with high dispersion (55,000) spectrographs working in the 1150 to 3100 Å spectral range. To evaluate impact of design on scientific objectives mission, a simulation software tool has been developed. This simulator builds development made for PLATO space mission and it designed generate synthetic time-series images by including models all important noise sources. We describe its performance. Moreover, application detectability...
The polarization state of starlight reflected by a planetary atmosphere uniquely reveals coverage, particle size, and composition aerosols as well changing cloud patterns. It is not possible to obtain comparable level detailed from flux-only observations. Furthermore, observations can probe the planets independently orbital geometry (i.e., transiting non-transiting planets). We show that high-resolution spectropolarimeter with broad wavelength particularly if attached large space telescope,...
Abstract Basic stellar parameters such as effective temperature, surface gravity, chemical composition, and projected rotational velocity, are important to classify stars crucial for successful asteroseismic modelling. However, the Kepler space data do not provide information. Therefore, ground-based spectral multi-colour observations of targets necessary complement data. For this purpose, in coordination with KASC observational Working Groups, high-resolution spectroscopic more than 500 B,...
The performance of the WUVS (WSO-UV Spectrographs) can be evaluated through simulations expected observations. Here we discuss implementation details and noise models applied in simulation software tool developed to carry on these simulations. Simulator has been implemented as a further development PLATO Simulator, adapting it specific characteristics. It is designed generate synthetic time-series images by including all important sources. overall budget output function different sets input...