A5082648700- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Isotope Analysis in Ecology
- Gamma-ray bursts and supernovae
- Geology and Paleoclimatology Research
- Space Satellite Systems and Control
- Geomagnetism and Paleomagnetism Studies
- Ionosphere and magnetosphere dynamics
- Space Exploration and Technology
- Atmospheric Ozone and Climate
- Astronomical Observations and Instrumentation
- Polysaccharides Composition and Applications
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Radiation Detection and Scintillator Technologies
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Surfactants and Colloidal Systems
- Rheology and Fluid Dynamics Studies
- Astrophysics and Star Formation Studies
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- Space Science and Extraterrestrial Life
- Archaeological and Historical Studies
Universidad de Huelva
2010-2023
Instituto de Astrofísica de Andalucía
2019-2023
Consejo Superior de Investigaciones Científicas
2023
Universidad de Sevilla
1994-2017
European Space Research and Technology Centre
2017
Mediterranean Center for Environmental Studies
1999
On 2013 September 11 at 20h07m28.68 $\pm$ 0.01 s UTC, two telescopes operated in the framework of our lunar impact flashes monitoring project recorded an extraordinary flash produced by on Moon a large meteoroid selenographic coordinates 17.2 0.2 $^{\circ}$ S, 20.5 W. The peak brightness this reached 2.9 mag V and it lasted over 8 seconds. estimated energy released during was 15.6 2.5 tons TNT under assumption luminous efficiency 0.002. This event, which is longest brightest confirmed thus...
The cyanobacterium (blue-green alga) Anabaena sp. ATCC 33047 produces an exopolysaccharide (EPS) during the stationary growth phase in batch culture. Chemical analysis of EPS revealed a heteropolysaccharidic nature, with xylose, glucose, galactose, and mannose main neutral sugars found. infrared (IR) spectrum showed absorption bands carboxylate groups. average molecular mass polymer was 1.35 MDa. Aqueous dispersions at concentrations ranging from 0.2% to 0.6% (w/w) marked shear-thinning...
We analyze lunar impact flashes recorded by our team during runs in December 2007, 2011, 2013 and 2014. In total, 12 with magnitudes ranging between 7.1 9.3 V band were identified. From these, 9 events could be linked to the Geminid stream. Using these observations ratio of luminous energy emitted respect kinetic impactors for meteoroids stream is estimated. By making use known Geminids meteoroid flux on Earth we found this 2.1x10$^{-3}$ average. compare efficiency other estimations derived...
We present new orbital data and dynamic results pointing towards the origin of Northern χ-Orionid meteoroid stream, which is a part Taurid complex. A software package was developed to establish potential parent bodies streams based on similarity their orbits. The analysis fireball observed 2011 December 6 identified two bodies: near-Earth object (NEO) 2002XM35 (previously proposed as this stream) more recently discovered potentially hazardous asteroid 2008XM1. calculation evolution elements...
We present the results of our Moon impact flashes detection campaigns performed around maximum activity period Perseid meteor shower in 2012 and 2013. Just one flash produced by a meteoroid was detected because very unfavourable geometric conditions, but 12 these were confirmed The visual magnitude ranged between 6.6 9.3. A luminous efficiency 1.8 $\times$ 10$^{-3}$ has been estimated for meteoroids from this stream. According to value, impactor masses would range 1.9 190 g. In addition, we...
A robotic observatory has been setup in the south‐west of Spain with aim to study meteoroids interacting Earth′s atmosphere and impacting on Moon′s surface. This is achieved by using an array high‐sensitivity CCD video cameras three automated Schmidt‐Cassegrain telescopes. We summarize here main characteristics this new facility.
On October 8, 2011 the Earth crossed dust trails ejected from comet 21P/Giacobini-Zinner in late 19th and early 20th Century. This gave rise to an outburst activity of Draconid meteor shower, international team was organized analyze this event. The SPanish Meteor Network (SPMN) joined initiative recorded Draconids by means low light level CCD cameras. In addition, spectroscopic observations were carried out. Tens multi-station recorded, including extraordinarily bright fireball (absolute...
We analyse here a wide sample of carbonaceous chondrites from historic falls (e.g. Allende, Cold Bokkeveld, Kainsaz, Leoville, Murchison, Murray, Orgueil and Tagish Lake) NASA Antarctic collection. With the analysis these meteorites we want to get new clues on role aqueous alteration in promoting reflectance spectra diversity evidenced most primitive chondrite groups. The selected meteorite specimens are large enough exemplify how laboratory rare groups exhibit distinctive features that can...
This paper deals with modeling the non-linear rheological behavior of lubricating greases at very low shear rates. With this aim, dynamic linear viscoelastic, stress relaxation, transient and steady-state flow, first normal difference measurements have been carried out on a diurea-derivative grease. A factorable viscoelasticity model, Wagner integral derived from K-BKZ constitutive equation, was used in order to predict response above-mentioned grease under shear. The time-dependent part...
The existence of asteroidal meteoroid streams capable producing meteorite-dropping bolides has long being invoked, but evidence is scarce. Recent modelling previously reported associations suggests that the time-scales to keep orbital coherence these meteorites are too short. We present an unequivocal association between near earth object (NEO) 2002NY40 and at least one bright fireball detected over Finland in 2006 August. Another two additional fireballs recorded from Spain seem be related,...
A very bright fireball called Béjar (SPMN110708), with a maximum brightness of −18, was observed over much Spain as well parts Portugal and France on 2008 July 11 at 21:17:39 utc. Fortuitously, it flew many the instruments that are part Spanish Meteor Fireball Network so accurate measurements its properties were recorded. We describe these observations make deductions from them regarding nature origin body gave rise to this fireball. The bolide first became visible height 98.3 km, attained...
Abstract By using high-resolution low-scan-rate all-sky CCD cameras, the SPanish Meteor Network (SPMN) detected an outburst of Orionid meteors associated with comet 1P/Halley on 2006 October 20–21. This detection was made possible due to operational concept SPMN that involves continuous monitoring meteor activity throughout year. Accurate heliocentric orbits have been obtained for three imaged simultaneously from two stations during outburst. Additional astrometry 33 single-station indicates...
Using high-resolution, low-scan-rate, all-sky CCD cameras and high-level video cameras, the SPanish Meteor fireball Network (SPMN) recorded 2007 κ Cygnid outburst from several observing stations. Here, accurate trajectory, radiant orbital data obtained for meteor are presented. The typical astrometric uncertainty is 1–2 arcmin, while velocity determination errors of order 0.3–0.6 km s−1, though this depends on distance each event to station its particular viewing geometry. observed...
On October 8th, 2011 the Earth crossed dust trails left by comet 21P/Giacobini-Zinner during its XIX and XX century perihelion approaches with being close to perihelion. The geometric circumstances of that encounter were thus favorable produce a meteor storm, but much older than in 1933 1946 historical encounters. As consequence Draconid display exhibited several activity peaks Zenithal Hourly Rates about 400 meteors per hour. In fact, if had been not forecasted, it could have passed almost...
A Geminid fireball with an absolute magnitude of -13 was observed over the south Spain on Dec. 15, 2009. This extraordinarily bright event (the brightest ever recorded by our team) imaged from two meteor observing stations operated SPanish Meteor Network (SPMN). The bolide exhibited fast and quasi-periodic variations in brightness, a behaviour typically associated to rotation parent meteoroid. inferred tensile strength this particle found be significantly higher that typical values obtained...
Abstract— Puerto Lápice is a new eucrite fall (Castilla‐La Mancha, Spain, 10 May 2007). In this paper, we report its detailed petrography, magnetic characterization, mineral and bulk chemistry, oxygen noble gas isotope systematics, radionuclide data. Study of four thin sections from two different specimens reveal that the meteorite brecciated in nature, it contains basaltic granulitic clasts, as well recrystallized impact melt breccia fragments. Shock veins are ubiquitous show evidence at...
The operation of the automated CCD spectrographs deployed by University Huelva at different observatories along Spain is described. These devices are providing information about chemical nature meteoroids ablating in atmosphere. In this way, relevant physico-chemical data being obtained from ground for materials coming bodies Solar System (mainly asteroids and comets). spectrographs, which work a fully autonomous way means software developed purpose, employed to perform systematic fireball...