Relevant bibliographies by topics / Asteroid 16 Psyche

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Academic literature on the topic 'Asteroid 16 Psyche'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Asteroid 16 Psyche"

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Viikinkoski, M., P. Vernazza, J. Hanuš, H. Le Coroller, K. Tazhenova, B. Carry, M. Marsset, et al. "(16) Psyche: A mesosiderite-like asteroid?" Astronomy & Astrophysics 619 (November 2018): L3. http://dx.doi.org/10.1051/0004-6361/201834091.

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Context. Asteroid (16) Psyche is the target of the NASA Psyche mission. It is considered one of the few main-belt bodies that could be an exposed proto-planetary metallic core and that would thus be related to iron meteorites. Such an association is however challenged by both its near- and mid-infrared spectral properties and the reported estimates of its density. Aims. Here, we aim to refine the density of (16) Psyche to set further constraints on its bulk composition and determine its potential meteoritic analog. Methods. We observed (16) Psyche with ESO VLT/SPHERE/ZIMPOL as part of our large program (ID 199.C-0074). We used the high angular resolution of these observations to refine Psyche’s three-dimensional (3D) shape model and subsequently its density when combined with the most recent mass estimates. In addition, we searched for potential companions around the asteroid. Results. We derived a bulk density of 3.99 ± 0.26 g cm−3 for Psyche. While such density is incompatible at the 3-sigma level with any iron meteorites (∼7.8 g cm−3), it appears fully consistent with that of stony-iron meteorites such as mesosiderites (density ∼4.25 g cm−3). In addition, we found no satellite in our images and set an upper limit on the diameter of any non-detected satellite of 1460 ± 200 m at 150 km from Psyche (0.2% × RHill, the Hill radius) and 800 ± 200 m at 2000 km (3% × RHill). Conclusions. Considering that the visible and near-infrared spectral properties of mesosiderites are similar to those of Psyche, there is merit to a long-published initial hypothesis that Psyche could be a plausible candidate parent body for mesosiderites.
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Ferrais, M., P. Vernazza, L. Jorda, N. Rambaux, J. Hanuš, B. Carry, F. Marchis, et al. "Asteroid (16) Psyche’s primordial shape: A possible Jacobi ellipsoid." Astronomy & Astrophysics 638 (June 2020): L15. http://dx.doi.org/10.1051/0004-6361/202038100.

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Context. Asteroid (16) Psyche is the largest M-type asteroid in the main belt and the target of the NASA Psyche mission. It is also the only asteroid of this size (D > 200 km) known to be metal rich. Although various hypotheses have been proposed to explain the rather unique physical properties of this asteroid, a perfect understanding of its formation and bulk composition is still missing. Aims. We aim to refine the shape and bulk density of (16) Psyche and to perform a thorough analysis of its shape to better constrain possible formation scenarios and the structure of its interior. Methods. We obtained disk-resolved VLT/SPHERE/ZIMPOL images acquired within our ESO large program (ID 199.C-0074), which complement similar data obtained in 2018. Both data sets offer a complete coverage of Psyche’s surface. These images were used to reconstruct the three-dimensional (3D) shape of Psyche with two independent shape modeling algorithms (MPCD and ADAM). A shape analysis was subsequently performed, including a comparison with equilibrium figures and the identification of mass deficit regions. Results. Our 3D shape along with existing mass estimates imply a density of 4.20 ± 0.60 g cm−3, which is so far the highest for a solar system object following the four telluric planets. Furthermore, the shape of Psyche presents small deviations from an ellipsoid, that is, prominently three large depressions along its equator. The flatness and density of Psyche are compatible with a formation at hydrostatic equilibrium as a Jacobi ellipsoid with a shorter rotation period of ∼3h. Later impacts may have slowed down Psyche’s rotation, which is currently ∼4.2 h, while also creating the imaged depressions. Conclusions. Our results open the possibility that Psyche acquired its primordial shape either after a giant impact while its interior was already frozen or while its interior was still molten owing to the decay of the short-lived radionuclide 26Al.
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Siltala, L., and M. Granvik. "Asteroid mass estimation with the robust adaptive Metropolis algorithm." Astronomy & Astrophysics 633 (January 2020): A46. http://dx.doi.org/10.1051/0004-6361/201935608.

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Context. The bulk density of an asteroid informs us about its interior structure and composition. To constrain the bulk density, one needs an estimated mass of the asteroid. The mass is estimated by analyzing an asteroid’s gravitational interaction with another object, such as another asteroid during a close encounter. An estimate for the mass has typically been obtained with linearized least-squares methods, despite the fact that this family of methods is not able to properly describe non-Gaussian parameter distributions. In addition, the uncertainties reported for asteroid masses in the literature are sometimes inconsistent with each other and are suspected to be unrealistically low. Aims. We aim to present a Markov-chain Monte Carlo (MCMC) algorithm for the asteroid mass estimation problem based on asteroid-asteroid close encounters. We verify that our algorithm works correctly by applying it to synthetic data sets. We use astrometry available through the Minor Planet Center to estimate masses for a select few example cases and compare our results with results reported in the literature. Methods. Our mass-estimation method is based on the robust adaptive Metropolis algorithm that has been implemented into the OpenOrb asteroid orbit computation software. Our method has the built-in capability to analyze multiple perturbing asteroids and test asteroids simultaneously. Results. We find that our mass estimates for the synthetic data sets are fully consistent with the ground truth. The nominal masses for real example cases typically agree with the literature but tend to have greater uncertainties than what is reported in recent literature. Possible reasons for this include different astrometric data sets and weights, different test asteroids, different force models or different algorithms. For (16) Psyche, the target of NASA’s Psyche mission, our maximum likelihood mass is approximately 55% of what is reported in the literature. Such a low mass would imply that the bulk density is significantly lower than previously expected and thus disagrees with the theory of (16) Psyche being the metallic core of a protoplanet. We do, however, note that masses reported in recent literature remain within our 3-sigma limits. Results. The new MCMC mass-estimation algorithm performs as expected, but a rigorous comparison with results from a least-squares algorithm with the exact same data set remains to be done. The matters of uncertainties in comparison with other algorithms and correlations of observations also warrant further investigation.
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Elkins-Tanton, Linda T. "Asteroid 16 Psyche: NASA's 14th Discovery Mission." Elements 14, no. 1 (February 1, 2018): 68. http://dx.doi.org/10.2138/gselements.14.1.68.

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Becker, Tracy M., Nathaniel Cunningham, Philippa Molyneux, Lorenz Roth, Lori M. Feaga, Kurt D. Retherford, Zoe A. Landsman, Emma Peavler, Linda T. Elkins-Tanton, and Jan-Erik Walhund. "HST UV Observations of Asteroid (16) Psyche." Planetary Science Journal 1, no. 3 (October 26, 2020): 53. http://dx.doi.org/10.3847/psj/abb67e.

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Binzel, Richard P., Schelte J. Bus, Shui Xu, Jessica Sunshine, Thomas H. Burbine, A. William Neely, and Robert W. Brown. "Rotationally Resolved Spectra of Asteroid 16 Psyche." Icarus 117, no. 2 (October 1995): 443–45. http://dx.doi.org/10.1006/icar.1995.1170.

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7

Siltala, Lauri, and Mikael Granvik. "Mass and Density of Asteroid (16) Psyche." Astrophysical Journal Letters 909, no. 1 (March 1, 2021): L14. http://dx.doi.org/10.3847/2041-8213/abe948.

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Shepard, Michael K., Katherine de Kleer, Saverio Cambioni, Patrick A. Taylor, Anne K. Virkki, Edgard G. Rívera-Valentin, Carolina Rodriguez Sanchez-Vahamonde, et al. "Asteroid 16 Psyche: Shape, Features, and Global Map." Planetary Science Journal 2, no. 4 (July 15, 2021): 125. http://dx.doi.org/10.3847/psj/abfdba.

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9

Shepard, Michael K., James Richardson, Patrick A. Taylor, Linda A. Rodriguez-Ford, Al Conrad, Imke de Pater, Mate Adamkovics, et al. "Radar observations and shape model of asteroid 16 Psyche." Icarus 281 (January 2017): 388–403. http://dx.doi.org/10.1016/j.icarus.2016.08.011.

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10

Avdellidou, C., M. Delbo’, and A. Fienga. "Exogenous origin of hydration on asteroid (16) Psyche: the role of hydrated asteroid families." Monthly Notices of the Royal Astronomical Society 475, no. 3 (February 9, 2018): 3419–28. http://dx.doi.org/10.1093/mnras/sty017.

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Dissertations / Theses on the topic "Asteroid 16 Psyche"

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Takir, Driss, Vishnu Reddy, Juan A. Sanchez, Michael K. Shepard, and Joshua P. Emery. "DETECTION OF WATER AND/OR HYDROXYL ON ASTEROID (16) Psyche." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622751.

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In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 mu m spectral region using the long-wavelength cross-dispersed (LXD: 1.9-4.2 mu m) mode of the SpeX spectrograph/imager at the NASA Infrared Telescope Facility. Our observations show that Psyche exhibits a 3 mu m absorption feature, attributed to water or hydroxyl. The 3 m absorption feature is consistent with the hydration features found on the surfaces of water-rich asteroids, attributed to OH- and/or H2O-bearing phases (phyllosilicates). The detection of a 3 mu m hydration absorption band on Psyche suggests that this asteroid may not be a. metallic core, or it could be a metallic core that has been impacted by carbonaceous material over the past 4.5 Gyr. Our results also indicate rotational spectral variations, which we suggest reflect heterogeneity in the metal/silicate ratio on the surface of Psyche.
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Sanchez, Juan A., Vishnu Reddy, Michael K. Shepard, Cristina Thomas, Edward A. Cloutis, Driss Takir, Albert Conrad, Cain Kiddell, and Daniel Applin. "DETECTION OF ROTATIONAL SPECTRAL VARIATION ON THE M-TYPE ASTEROID (16) PSYCHE." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622750.

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The asteroid (16) Psyche is of scientific interest because it contains similar to 1% of the total mass of the asteroid belt and is thought to be the remnant metallic core of a protoplanet. Radar observations have indicated the significant presence of metal on the surface with a small percentage of silicates. Prior ground-based observations showed rotational variations in the near-infrared (NIR) spectra and radar albedo of this asteroid. However, no comprehensive study that combines multi-wavelength data has been conducted so far. Here we present rotationally resolved NIR spectra (0.7-2.5 mu m) of (16) Psyche obtained with the NASA Infrared Telescope Facility. These data have been combined with shape models of the asteroid for each rotation phase. Spectral band parameters extracted from the NIR spectra show that the pyroxene band center varies from similar to 0.92 to 0.94 mu m. Band center values were used to calculate the pyroxene chemistry of the asteroid, whose average value was found to be Fs(30)En(65)Wo(5). Variations in the band depth (BD) were also observed, with values ranging from 1.0% to 1.5%. Using a new laboratory spectral calibration method, we estimated an average orthopyroxene content of 6% +/- 1%. The mass-deficit region of Psyche, which exhibits the highest radar albedo, also shows the highest value for the spectral slope and the minimum BD. The spectral characteristics of Psyche suggest that its parent body did not have the typical structure expected for a differentiated body or that the sequence of events that led to its current state was more complex than previously thought.
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"Differential Equation Models for Understanding Phenomena beyond Experimental Capabilities." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.53687.

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abstract: Mathematical models are important tools for addressing problems that exceed experimental capabilities. In this work, I present ordinary and partial differential equation (ODE, PDE) models for two problems: Vicodin abuse and impact cratering. The prescription opioid Vicodin is the nation's most widely prescribed pain reliever. The majority of Vicodin abusers are first introduced via prescription, distinguishing it from other drugs in which the most common path to abuse begins with experimentation. I develop and analyze two mathematical models of Vicodin use and abuse, considering only those patients with an initial Vicodin prescription. Through adjoint sensitivity analysis, I show that focusing efforts on prevention rather than treatment has greater success at reducing the total population of abusers. I prove that solutions to each model exist, are unique, and are non-negative. I also derive conditions for which these solutions are asymptotically stable. Verification and Validation (V&V) are necessary processes to ensure accuracy of computational methods. Simulations are essential for addressing impact cratering problems, because these problems often exceed experimental capabilities. I show that the Free Lagrange (FLAG) hydrocode, developed and maintained by Los Alamos National Laboratory, can be used for impact cratering simulations by verifying FLAG against two analytical models of aluminum-on-aluminum impacts at different impact velocities and validating FLAG against a glass-into-water laboratory impact experiment. My verification results show good agreement with the theoretical maximum pressures, and my mesh resolution study shows that FLAG converges at resolutions low enough to reduce the required computation time from about 28 hours to about 25 minutes. Asteroid 16 Psyche is the largest M-type (metallic) asteroid in the Main Asteroid Belt. Radar albedo data indicate Psyche's surface is rich in metallic content, but estimates for Psyche's composition vary widely. Psyche has two large impact structures in its Southern hemisphere, with estimated diameters from 50 km to 70 km and estimated depths up to 6.4 km. I use the FLAG hydrocode to model the formation of the largest of these impact structures. My results indicate an oblique angle of impact rather than a vertical impact. These results also support previous claims that Psyche is metallic and porous.
Dissertation/Thesis
Psyche asteroid impact simulation initialization
Psyche asteroid impact simulation video
Doctoral Dissertation Applied Mathematics 2019
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Reports on the topic "Asteroid 16 Psyche"

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Caldwell, Wendy Kaye. Understanding Asteroid 16 Psyche's Composition through 3D Hydrocode Impact Crater Models. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1570602.

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