Papers by gerardo dominguez
Lunar and Planetary Science Conference, Mar 1, 2021
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Cornell University - arXiv, Sep 14, 2021
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LPICo, Jul 1, 2015
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AGU Fall Meeting Abstracts, Dec 1, 2019
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AGU Fall Meeting Abstracts, Dec 1, 2020
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Pump-probe spectroscopy is central for exploring ultrafast dynamics of fundamental excitations, c... more Pump-probe spectroscopy is central for exploring ultrafast dynamics of fundamental excitations, collective modes and energy transfer processes. Typically carried out using conventional
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Introduction:Understanding why the planets and planetary materials in general are enriched in the... more Introduction:Understanding why the planets and planetary materials in general are enriched in the heavier isotopes of oxygen (17O, 18O) compared to the Sun is a primary and unsolved problem in cosmochemistry [1, 2]. Models that have been proposed to explain the observed anomalous distribution of oxygen isotopes generally fall into four classes:(1) nucleosynthetic origins due to supernova injection of 16O into the early solar system (2) photo-dissociation of gas-phase CO in protoplanetary disk and/or parent molecular cloud (a.k.a. self-shielding) (3) distinct isotopic compositions of interstellar dust compared to gas-phase oxygen [3] and (4) symmetry dependent mass-independent isotopic fractionations similar to the formation of ozone (O2 + O +M→ O3 +M) in the gas-phase [4]. One variant of this class is the hypothesis that the reaction pathways that lead to the formation of water on cold dust grains in molecular clouds may have imparted oxygen-bearing dust grains with enrichments in 1...
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VOLATILE TRANSPORT. C. Alfaro, A. Tran, K. A. Carr, O. Azubuike, C. Carreira, P. Prem, G. Domingu... more VOLATILE TRANSPORT. C. Alfaro, A. Tran, K. A. Carr, O. Azubuike, C. Carreira, P. Prem, G. Dominguez, B. T. Greenhagen, D. M. Hurley, A. M. Stickle, G. W. Patterson, J. T. S. Cahill, University of Maryland, Baltimore County, Baltimore, MD (c204@umbc.edu). Johns Hopkins University, Baltimore, MD. Johns Hopkins University Applied Physics Laboratory, Laurel, MD (parvathy.prem@jhuapl.edu). California State University, San Marcos, San Marcos, CA.
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Introduction: Isotopic compositional measurements of lunar ice would provide insight into the ori... more Introduction: Isotopic compositional measurements of lunar ice would provide insight into the origin and potentially the age of the reservoir. Multiple exogenic and endogenic sources have been proposed as the source of lunar volatiles (e.g., comets, interplanetary dust particles, meteorites, production on the surface via solar wind, and volcanic outgassing). An instrument that can measure isotopes in-situ lies in the critical path for determining the delivery and trapping process for lunar volatiles: e.g., source(s), transport to the polar regions, and ultimate storage. Hence, we are beginning to develop a flight-ready instrument, which will include extraction and analysis, for the purpose of measuring H, O and C isotopes of polar volatiles. Here we focus on our initial results with hydrogen and oxygen isotopes. Historically, the method of choice for determining the stable isotopic composition of samples has been Isotope Ratio Mass Spectrometry (IRMS) utilizing the null method devel...
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Bulletin of the AAS, 2021
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Bulletin of the American Astronomical Society, 2019
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The capture of cometary dust grains in aerogel at the well defined impact velocity of 6.1 km/s re... more The capture of cometary dust grains in aerogel at the well defined impact velocity of 6.1 km/s resulted in the production of a range of impact cavity morphologies. These tracks range from the classical carrot shaped tracks (type A) seen in laboratory experiments with efractory-solid projectiles, to bulbous tracks with “turnip”-like properties and a stylus (type B), to bulbous stubby tracks (type C) [1,2]. These morphologies must reflect the underlying variati on in the structure and strength of cometary dust grains. The cap ture of cometary dust grains also presents the possibility that the chemical content of projec- tiles, in the form of volatiles that are released during capture, also contributed to bulbous track features and analyses of the terminal particles and track residues suggest that the volatile content of the projectiles, released preferentially during capture, would have contributed to the range of morphologies seen in the Stardust cometary dust tracks. An additional c...
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Bulletin of the AAS, 2020
Understanding the origin and evolution of the lunar volatile system is not only compelling lunar ... more Understanding the origin and evolution of the lunar volatile system is not only compelling lunar science, but also fundamental Solar System science. This white paper (submitted to the US National Academies' Decadal Survey in Planetary Science and Astrobiology 2023-2032) summarizes recent advances in our understanding of lunar volatiles, identifies outstanding questions for the next decade, and discusses key steps required to address these questions.
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Bulletin of the American Physical Society, 2018
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Goldschmidt2021 abstracts, 2021
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Atmospheric Chemistry and Physics Discussions, 2009
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Nature Astronomy, 2019
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Papers by gerardo dominguez