S. Martín‐Ruiz
A5012605503- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Inertial Sensor and Navigation
- Impact of Light on Environment and Health
- Solar and Space Plasma Dynamics
- History and Developments in Astronomy
- Air Quality and Health Impacts
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- COVID-19 impact on air quality
- Educational Methods and Psychological Studies
- Archaeological and Historical Studies
- CCD and CMOS Imaging Sensors
- Spacecraft Design and Technology
- Knowledge Societies in the 21st Century
- Space Exploration and Technology
- Astrophysics and Cosmic Phenomena
- Magnetic Bearings and Levitation Dynamics
- Historical Studies in Science
Instituto de Astrofísica de Andalucía
2015-2024
Consejo Superior de Investigaciones Científicas
2004-2019
Brera Astronomical Observatory
2004-2009
Konkoly Observatory
2009
KU Leuven
2009
Centre National de la Recherche Scientifique
2009
Institut d'Astrophysique Spatiale
2009
Université Paris-Saclay
2009
Astrophysique, Instrumentation et Modélisation
2009
Université Paris Cité
2009
This paper gives an overview of the CARMENES instrument and survey that will be carried out with it during first years operation. (Calar Alto high-Resolution search for M dwarfs Exoearths Near-infrared optical Echelle Spectrographs) is a next-generation radial-velocity under construction 3.5m telescope at Calar Observatory by consortium eleven Spanish German institutions. The scientific goal project conducting 600-night exoplanet targeting ~ 300 completed instrument. consists two separate...
The Kepler spacecraft is providing time series of photometric data with micromagnitude precision for hundreds A-F type stars. We present a first general characterization the pulsational behaviour stars as observed in light curves sample 750 candidate propose three main groups to describe variety pulsating stars: gamma Dor, delta Sct, and hybrid assign 63% our one groups, identify remaining part rotationally modulated/active stars, binaries, different spectral type, or that show no clear...
Observations of the pulsations stars can be used to infer their interior structure and test theoretical models. The main-sequence γ Doradus (Dor) δ Scuti (Sct) with masses 1.2–2.5 M☉ are particularly useful for these studies. Dor pulsate in high-order g-modes periods order 1 day, driven by convective blocking at base envelope convection zone. Sct low-order g- p-modes 2 hr, κ mechanism operating He ii ionization Theory predicts an overlap region Hertzsprung–Russell diagram between instability...
The CARMENES instrument is a pair of high-resolution (R⪆80,000) spectrographs covering the wavelength range from 0.52 to 1.71 μm, optimized for precise radial velocity measurements. It was installed and commissioned at 3.5m telescope Calar Alto observatory in Southern Spain 2015. first large science program survey ~ 300 M dwarfs, which started on Jan 1, 2016. We present an overview all subsystems (front end, fiber system, visible-light spectrograph, near-infrared calibration units, etalons,...
The CARMENES instrument was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability search for temperate rocky planets around a sample of nearby cool stars. broad wavelength coverage designed provide range stellar activity indicators assess the nature potential RV signals and valuable spectral information help characterise targets. Data Release 1 (DR1) makes public all observations obtained during guaranteed time observations, which ran from 2016 2020...
Aims. Knowledge of rotation periods ( P rot ) is important for understanding the magnetic activity and angular momentum evolution late-type stars, as well evaluating radial velocity signals potential exoplanets identifying false positives. We measured photometric spectroscopic a large sample nearby bright M dwarfs with spectral types from M0 to M9, part our continual effort fully characterize Guaranteed Time Observation programme stars CARMENES survey. Methods. analyse light curves chiefly...
<i>Context. <i/> <i>Aims. <i/>This work presents the results obtained by CoRoT on HD 50844, only <i>δ<i/> Sct star observed in initial run (57.6 d). The aim of these observations was to investigate and characterize for first time pulsational behaviour a star, when at level precision with much better duty cycle than from ground.<i>Methods. <i/>The 140 016 datapoints were analysed using independent approaches (SigSpec software different iterative sine-wave fittings) several checks performed...
We present an analysis of the <i>δ<i/>-Scuti star HD 174936 (ID 7613) observed by CoRoT during first short run SRc01 (27 days). A total number 422 frequencies were extracted from light curve using standard prewhitening techniques. This was obtained considering a spectral significance limit sig = 10 software package SigSpec. Our oscillation frequency spectrum reveals spacing periodicity around 52 <i>μ<i/>Hz. Although modes considered here are not in asymptotic regime, comparison with stellar...
CARMENES (Calar Alto high-Resolution search for M dwarfs with Exo-earths Near-infrared and optical Echelle Spectrographs) is a next-generation instrument the 3.5m telescope at Calar Observatory, built by consortium of eleven Spanish German institutions. The consists two separate échelle spectrographs covering wavelength range from 0.55 μm to 1.7 spectral resolution R = 82, 000, fed fibers Cassegrain focus telescope. Both are housed in temperature-stabilized vacuum tanks, enable long-term 1...
Delta Scuti ($\delta$ Sct) stars are intermediate-mass pulsators, whose intrinsic oscillations have been studied for decades. However, modelling their pulsations remains a real theoretical challenge, thereby even hampering the precise determination of global stellar parameters. In this work, we used space photometry observations eclipsing binaries with $\delta$ Sct component to obtain reliable physical parameters and oscillation frequencies. Using that information, derived an observational...
'Lockdown' periods in response to COVID-19 have provided a unique opportunity study the impacts of economic activity on environmental pollution (e.g. NO$_2$, aerosols, noise, light). The effects NO$_2$ and aerosols been very noticeable readily demonstrated, but that light has proven challenging determine. main reason for this difficulty is primary source nighttime satellite imagery earth SNPP-VIIRS/DNB instrument, which acquires data late at night after most human nocturnal already occurred...
We present the discovery of an Earth-mass planet ( M b sin i = 1.26 ± 0.21 ⊕ ) on a 15.6 d orbit relatively nearby ~ 9.6 pc) and low-mass (0.167 0.011 ⊙ M5.0 V star, Wolf 1069. Sitting at separation 0.0672 0.0014 au away from host star puts 1069 in habitable zone (HZ), receiving incident flux S 0.652 0.029 . The planetary signal was detected using telluric-corrected radial-velocity (RV) data CARMENES spectrograph, amounting to total 262 spectroscopic observations covering almost four years....
CARMENES (Calar Alto high-Resolution search for M dwarfs with Exo-earths Near-infrared and optical Echelle Spectrographs) is a next-generation instrument to be built the 3.5m telescope at Calar Observatory by consortium of Spanish German institutions. Conducting five-year exoplanet survey targeting ~ 300 stars completed an integral part project. The consists two separate spectrographs covering wavelength range from 0.52 1.7 μm spectral resolution R = 85, 000, fed fibers Cassegrain focus...
The design and construction of CARMENES has been presented at previous SPIE conferences. It is a next-generation radial-velocity instrument the 3.5m telescope Calar Alto Observatory, which was built by consortium eleven Spanish German institutions. consists two separate échelle spectrographs covering wavelength range from 0.52 to 1.71μm spec-tral resolution R < 80,000, fed fibers Cassegrain focus telescope. saw "First Light" on Nov 9, 2015. During commissioning initial operation phases, we...
We thank the referee for valuable comments which improved paper. also Dr. Laetitia Delrez and Pedro Sada sharing WASP-103 HAT-P-23 light curves with us. GM MS acknowledge financial support from National Science Centre, Poland through grant no. 2016/23/B/ST9/00579. MF acknowledges grants AYA2014-54348-C3-1-R AYA2016-79425-C3-3-P of Spanish Ministry Economy Competitiveness (MINECO), co-funded EU FEDER funds. DD projects DN 08-1/2016, 08-20/2016 Foundation Bulgarian education science as well by...
Aims. The aim of this work was to use a multi-approach technique derive the most accurate values possible physical parameters δ Sct star HD 174966, which observed with CoRoT satellite. In addition, we searched for periodic pattern in frequency spectra goal using it determine mean density star.
Context: We present the results of an extensive ground-based photometric and spectroscopic campaign on gamma Dor CoRoT target HD49434. This was preparatory to satellite observations, which took place from October 2007 March 2008. Results: The frequency analysis clearly shows presence four frequencies in 0.2-1.7 c/d interval, as well six 5-12 domain. low are typical for variables while high common delta Sct pulsators. propose 2.666 a possible rotational frequency. All modes, identification...
The work reported here demonstrates that it is possible to accurately determine surface gravities of $\delta$ Sct stars using the frequency content from high precision photometry and a measurement parallax. Using sample 10 eclipsing binary systems with component unique star discovered transiting planet, WASP-33, we were able refine $\Delta\nu-\bar\rho$ relation. this relation parallaxes, obtained independent values for masses radii, allowing us calculate without any constraints spectroscopic...
The double-mode pulsation of GSC 00144-03031 has been detected when searching for COROT targets. A very large dataset composed 4722 photometric measurements was collected at six observatories in Europe and America. There is no hint the excitation additional modes (down to 0.6 mmag) therefore seems be a pure pulsator, with short fundamental radial mode (P = 84 min). From uvbyβ photometry evolutionary tracks it appears Pop. I star M 1.75 , located middle instability strip, close Zero-Age Main...
Thanks to high-precision photometric data legacy from space telescopes like CoRoT and Kepler, the scientific community could detect characterize power spectra of hundreds thousands stars. Using scaling relations, it is possible estimate masses radii for solar-type pulsators. However, these stars are not only kind stellar objects that follow rules: $\delta$ Scuti seem be characterized with seismic indexes such as large separation ($\Delta\nu$). long-duration high-cadence TESS light curves, we...
Abstract The search for Earth-like planets around late-type stars using ultra-stable spectrographs requires a very precise characterization of the stellar activity and magnetic cycle star, since these phenomena induce radial velocity (RV) signals that can be misinterpreted as planetary signals. Among nearby stars, we have selected Barnard’s Star (Gl 699) to carry out set spectroscopic data covers about 14.5 years comes from seven different spectrographs: HARPS, HARPS-N, CARMENES, HIRES,...