Persona: Oliveira, Joana S.
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Oliveira
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Joana S.
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Publicación Restringido Asymmetric Magnetic Anomalies Over Young Impact Craters on Mercury(AGU, 2021-02-01) Galluzzi, V.; Oliveira, Joana S.; Wright, Jack; Rothery, D. A.; Hood, L. L.; Oliveira, Joana S.; National Aeronautics and Space Administration (NASA); Agenzia Spaziale Italiana (ASI); European Commission (EC)Mercury's crustal magnetic field map includes anomalies that are related to impact craters. Mercury's surface has a low iron abundance, but it is likely that some impactors brought magnetic carriers able to register the planet's magnetic field that was present during impact. Anomalies associated with the relatively young Rustaveli and Stieglitz craters are asymmetric with respect to the crater center. We analyze the location of the magnetic anomalies and the impact crater morphologies to understand whether there is any correlation. We investigate the geological framework of these two craters to constrain the overall impact dynamics. In both cases, magnetic anomalies correlate well with the location of impact melt and the inferred impact direction. Both impact angles were probably 40°–45°, with preferential distribution of the melt downrange. Inversion dipoles suggest that the impact melt located downrange encompasses some magnetized material, which is hence likely responsible for the detected magnetic anomalies. We observe strong crustal magnetic field imprints near two recent craters on Mercury. We know that the crust of rocky planets may include magnetic elements like iron that can record the local magnetic field under certain circumstances. However, Mercury's crust is known to be remarkably poor in iron. In this study, we want to find out whether these observed magnetic imprints near craters happened by chance or if it can be explained by the impactors bringing iron to Mercury's surface. We make a joint-study of two different scientific areas: Geology and geophysics. Via the geological study, we found an uneven distribution of “impact melt,” which is material flung out of the crater in molten form during the impact that made the crater. Via the geophysical study, we found evidence that magnetized material correlates with the position of those pools that are found in the downrange direction of the impact. In conclusion, this study supports the hypothesis that iron was brought on Mercury by the impactors.Publicación Acceso Abierto Vector magnetometry to analyse the Caldereta volcano in the canary islands as a possible terrestrial analogue of mars(Elsevier, 2025-04-07) Díaz Michelena, M.; Losantos, Emma; Rivero, Miguel Ángel; Oliveira, Joana S.; García Monasterio, Óscar; Mansilla, Federico; Melguizo, Ángel; García Bueno, Jose Luis; Salamanca, David; Fernández Romero, S.; Rivero Rodríguez, Miguel Ángel; Oliveira, Joana S.; Ministerio de Ciencia e Innovación (MICINN); European Research Council (ERC)Volcanoes are typical features of terrestrial planets' surfaces. Among the different geological processes which give rise to volcanoes, hydromagmatic eruptions are of particular importance for the search of extraterrestrial life since they require the presence of water. Phreatomagmatic eruptions on Mars shall resemble those of the Earth. The possibility to perform magnetic surveys on Mars with magnetometers carried by helicopters opens a new scenario to gain more insights on such features. As a natural first step, gathering a database of terrestrial analogue magnetic signatures is desired, prior to magnetic surveys on the Martian surface. In this work we have selected the Caldereta volcano, a phreatomagmatic edifice in Lanzarote Island (Canary Islands), to perform a magnetic survey using on board drones magnetometry. The acquired data will allow to compare future measurements from other similar structures of the “Red Planet”. The survey casts vector magnetic field data generated by the volcanic edifice. Additionally, we suggest a simplified structure that mimics the geomorphology observed, we attribute a magnetization to such structure and develop a mathematical model that computes its sourced magnetic field. Finally, we develop synthetic models of a volcano on Mars which have been preliminarily classified as hydromagmatic taking Caldereta simulated structure as a reference.Publicación Restringido Magnetic Anomalies in Five Lunar Impact Basins: Implications for Impactor Trajectories and Inverse Modeling(Advancing Earth and Space Science AGU, 2020-12-30) Hood, L. L.; Oliveira, Joana S.; Andrews Hanna, J. J.; Wieczorek, Mark A.; Stewart, S. T.; Oliveira, Joana S.; National Aeronautics and Space Administration (NASA)A recent large-scale map of the lunar crustal magnetic field is examined for the existence of magnetic anomalies internal to ringed impact basins. It is found that, of 25 basins with upper preNectarian and younger ages, 18 contain mapped internal anomalies with amplitudes of at least 1 nT at 30 km altitude. Of these, five are most confidently judged to contain intrinsic anomalies (i.e., anomalies located within the inner basin rims and originating at the times of basin formation): Crisium, Humboldtianum, Mendel-Rydberg, Moscoviense, and Nectaris. Comparing the anomaly distributions with previous numerical simulations of the impact of iron-rich planetesimals to form a large (SPA-sized) basin, inferences are drawn about the likely trajectories of the impactors. Specifically, results suggest that impactor trajectories for these basins were within ∼45° of being vertical and tended to lie on average parallel to the lunar equatorial plane and the ecliptic plane. Inverse modeling of anomalies within these basins yields inferred directions of magnetization that are difficult to reconcile with the axial centered dipole hypothesis for the geometry of the internal lunar dynamo field: Paleomagnetic pole positions are widely scattered and, in agreement with a recent independent study, the two main anomalies within Crisium yield significantly different directions of magnetization.Publicación Restringido Anisotropic magnetoresistance (AMR) instrument to study the Martian magnetic environment from the surface: expected scientific return(Springer Link, 2023-08-15) Díaz Michelena, M.; Rivero, Miguel Ángel; Fernández Romero, S.; Adeli, Solmaz; Oliveira, Joana S.; Henrich, Clara; Aspás, Alberto; Parrondo Sempere, María Concepción; Rivero Rodríguez, Miguel Ángel; Oliveira, Joana S.; Instituto Nacional de Técnica Aeroespacial (INTA); Centros de Excelencia Severo Ochoa, BARCELONA SUPERCOMPUTING CENTER (BSC), SEV2015-0493The ExoMars programme has the objective to answer to the question of whether life ever existed on Mars. The second mission comprising the Rosalind Franklin rover and Kazachok Surface Platform was designed to focus specifically on the characterization of the environmental parameters which can play an important role for the existence of life on the surface of the planet. One of these parameters is the magnetic field because of its ability of shielding the solar and cosmic radiation. For such characterization, the scientific suite of the Surface Platform counts with two instruments: the Anisotropic MagnetoResistance (AMR) and the MArtIan Ground ElectromagneTic (MAIGRET) instruments. The AMR goal is to characterize both the surface and subsurface and the time-varying magnetic fields, related to the crustal and the external fields respectively, at the ExoMars landing site in Oxia Planum. The operation to achieve these goals includes two phases, the first phase corresponding to the lander descent and the second phase in which the instrument is deployed on the surface. In this work, we simulate the first operations phase using synthetic magnetic field models, assuming that the different crustal units at the landing site might be magnetized. We also perform measurements in our laboratory to simulate the second phase operation of the instrument on the Martian surface. We discuss the capability of interpretation of the instrument, based on the available information of the landing site and the results from our models.Publicación Restringido A New Large-Scale Map of the Lunar Crustal Magnetic Field and Its Interpretation(Advancing Earth and Space Science AGU, 2021-02-23) Hood, L. L.; Torres, C. B.; Oliveira, Joana S.; Wieczorek, Mark A.; Stewart, S. T.; Oliveira, Joana S.; National Aeronautics and Space Administration (NASA)A new large-scale map of the lunar crustal magnetic field at 30 km altitude covering latitudes from 65°S to 65°N has been produced using high-quality vector magnetometer data from two complementary polar orbital missions, Lunar Prospector and SELENE (Kaguya). The map has characteristics similar to those of previous maps but better resolves the shapes and distribution of weaker anomalies. The strongest group of anomalies is located on the northwest side of the South Pole-Aitken basin approximately antipodal to the Imbrium basin. On the near side, both strong isolated anomalies and weaker elongated anomalies tend to lie along lines oriented radial to Imbrium. These include named anomalies such as Reiner Gamma, Hartwig, Descartes, Abel, and Airy. The statistical significance of this tendency for elongated anomalies is verified by Monte Carlo simulations. Great circle paths determined by end points of elongated anomaly groups and the locations of five individual strong anomalies converge within the inner rim of Imbrium and intersect within the Imbrium antipode zone. Statistically significant evidence for similar alignments northwest of the Orientale basin is also found. The observed distribution of anomalies on the near side and the location of the strongest anomaly group antipodal to Imbrium are consistent with the hypothesis that iron from the Imbrium impactor was mixed into ejecta that was inhomogeneously deposited downrange in groups aligned radial to the basin and concentrated antipodal to the basin.Publicación Acceso Abierto BepiColombo Science Investigations During Cruise and Flybys at the Earth, Venus and Mercury(Springer Link, 2021-02-11) Mangano, V.; Dósa, M.; Franz, M.; Milillo, A.; Oliveira, Joana S.; Joo Lee, Y.; McKenna Lawlor, S.; Grassi, D.; Heyner, D.; Kozyrev, A. S.; Peron, R.; Helbert, J.; Besse, S.; De la Fuente, S.; Montagnon, E.; Zender, J.; Volwerk, M.; Chaufray, J. Y.; Slavin, J. A.; Krüger, H.; Maturilli, A.; Cornet, T.; Iwai, K.; Miyoshi, Y.; Lucente, M.; Massetti, S.; Schmidt, C. A.; Dong, C.; Quarati, F.; Hirai, T.; Varsani, A.; Belyaev, D. A.; Zhong, J.; Kilpua, E. K. J.; Jackson, B. V.; Odstrcil, D.; Plaschke, F.; Vainio, R.; Jarvinen, R.; Ivanovsky, S. L.; Madár, A.; Erdos, G.; Plainaki, C.; Plainaki, C.; Alberti, T.; Alberti, T.; Aizawa, S.; Benkhoff, J.; Murakami, G.; Quemerais, E.; Hiesinger, H.; Mitrofanov, I. G.; Iess, L.; Santoli, F.; Orsini, S.; Lichtenegger, H.; Laky, G.; Barabash, S.; Moissl, R.; Huovelin, Juhani; Kasaba, Y.; Saito, Y.; Kobayashi, H.; Baumjohann, W.; Oliveira, Joana S.; European Research Council (ERC); National Aeronautics and Space Administration (NASA); Mangano, V. [0000-0002-9903-4053]The dual spacecraft mission BepiColombo is the first joint mission between the European Space Agency (ESA) and the Japanese Aerospace Exploration Agency (JAXA) to explore the planet Mercury. BepiColombo was launched from Kourou (French Guiana) on October 20th, 2018, in its packed configuration including two spacecraft, a transfer module, and a sunshield. BepiColombo cruise trajectory is a long journey into the inner heliosphere, and it includes one flyby of the Earth (in April 2020), two of Venus (in October 2020 and August 2021), and six of Mercury (starting from 2021), before orbit insertion in December 2025. A big part of the mission instruments will be fully operational during the mission cruise phase, allowing unprecedented investigation of the different environments that will encounter during the 7-years long cruise. The present paper reviews all the planetary flybys and some interesting cruise configurations. Additional scientific research that will emerge in the coming years is also discussed, including the instruments that can contribute.Publicación Acceso Abierto Constraints on the Spatial Distribution of Lunar Crustal Magnetic Sources From Orbital Magnetic Field Data(Advancing Earth and Space Science (AGU), 2024-02-14) Oliveira, Joana S.; Vervelidou, Foteini; Wieczorek, Mark A.; Díaz Michelena, M.; Oliveira, Joana S.; Ministerio de Ciencia e Innovación (MICINN); European Research Council (ERC)Spacecraft measurements show that the crust of the Moon is heterogeneously magnetized. The sources of these magnetic anomalies are yet not fully understood, with most not being related to known geological structures or processes. Here, we use an inversion methodology that relies on the assumption of unidirectional magnetization, commonly referred to as Parker's method, to elucidate the origin of the magnetic sources by constraining the location and geometry of the underlying magnetization. This method has been used previously to infer the direction of the underlying magnetization but it has not been tested as to whether it can infer the geometry of the source. The performance of the method is here assessed by conducting a variety of tests, using synthetic magnetized bodies of different geometries mimicking the main geological structures potentially magnetized within the lunar crust. Results from our tests show that this method successfully localizes and delineates the two-dimensional surface projection of subsurface three-dimensional magnetized bodies, provided their magnetization is close to unidirectional and the magnetic field data are of sufficient spatial resolution and reasonable signal-to-noise ratio. We applied this inversion method to two different lunar magnetic anomalies, the Mendel-Rydberg impact basin and the Reiner Gamma swirl. For Mendel-Rydberg, our analysis shows that the strongest magnetic sources are located within the basin's inner ring, whereas for Reiner Gamma, the strongest magnetic sources form a narrow dike-like body that emanates from the center of the Marius Hills volcanic complex.Publicación Acceso Abierto Geodesy, Geophysics and Fundamental Physics Investigations of the BepiColombo Mission(Springer Link, 2021-02-26) Genova, A.; Hussmann, H.; Van Hoolst, T.; Heyner, D.; Less, L.; Santoli, F.; Thomas, N.; Cappuccio, P.; Di Stefano, I.; Kolhey, P.; Langlais, B.; Mieth, J. Z. D.; Oliveira, Joana S.; Stark, A.; Steinbrügge, G.; Tosi, N.; Wicht, J.; Benkhoff, J.; Oliveira, Joana S.; Agenzia Spaziale Italiana (ASI); Bundesministerium für Wirtschaft und Energie (BMWi); Deutsches Zentrum für Luft- und Raumfahrt (DLR); Genova, A. [0000-0001-5584-492X]; Hussmann, H. [0000-0002-3816-0232]; Van Hoolst, T. [0000-0002-9820-8584]; Heyner, D. [0000-0001-7894-8246]; Iess, L. [0000-0002-6230-5825]; Santoli, F. [0000-0003-2493-0109]; Thomas, N. [0000-0002-0146-0071]; Cappuccio, P. [0000-0002-8758-6627]; Di Stefano, I. [0000-0003-1491-6848]; Langlais, B. [0000-0001-5207-304X]; Oliveira, J. S. [0000-0002-4587-2895]; Stark, A. [0000-0001-9110-1138]; Steinbrügge, G. [0000-0002-1050-7759]; Tosi, N. [0000-0002-4912-2848]; Wicht, J. [0000-0002-2440-5091]; Benkhoff, J. [0000-0002-4307-9703]In preparation for the ESA/JAXA BepiColombo mission to Mercury, thematic working groups had been established for coordinating the activities within the BepiColombo Science Working Team in specific fields. Here we describe the scientific goals of the Geodesy and Geophysics Working Group (GGWG) that aims at addressing fundamental questions regarding Mercury’s internal structure and evolution. This multidisciplinary investigation will also test the gravity laws by using the planet Mercury as a proof mass. The instruments on the Mercury Planetary Orbiter (MPO), which are devoted to accomplishing the GGWG science objectives, include the BepiColombo Laser Altimeter (BELA), the Mercury orbiter radio science experiment (MORE), and the MPO magnetometer (MPO-MAG). The onboard Italian spring accelerometer (ISA) will greatly aid the orbit reconstruction needed by the gravity investigation and laser altimetry. We report the current knowledge on the geophysics, geodesy, and evolution of Mercury after the successful NASA mission MESSENGER and set the prospects for the BepiColombo science investigations based on the latest findings on Mercury’s interior. The MPO spacecraft of the BepiColombo mission will provide extremely accurate measurements of Mercury’s topography, gravity, and magnetic field, extending and improving MESSENGER data coverage, in particular in the southern hemisphere. Furthermore, the dual-spacecraft configuration of the BepiColombo mission with the Mio spacecraft at higher altitudes than the MPO spacecraft will be fundamental for decoupling the internal and external contributions of Mercury’s magnetic field. Thanks to the synergy between the geophysical instrument suite and to the complementary instruments dedicated to the investigations on Mercury’s surface, composition, and environment, the BepiColombo mission is poised to advance our understanding of the interior and evolution of the innermost planet of the solar system.
