L. A. Young
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View article: End-to-end characterization of AAV manufacturing process using charge detection mass spectrometry
End-to-end characterization of AAV manufacturing process using charge detection mass spectrometry Open
[This corrects the article DOI: 10.1016/j.omtm.2025.101607.].
View article: Calculating Occultation Light Curves Using Wavelets: Exponential Atmospheres and the Constraints of Static Stability
Calculating Occultation Light Curves Using Wavelets: Exponential Atmospheres and the Constraints of Static Stability Open
The signatures of waves are seen during many high-quality ground-based refractive stellar occultations by solar system atmospheres. We present a new forward-modeling technique for ground-based stellar occultations based on wavelet decompos…
View article: Modeling the formation of N2 and CH4 frost on Pluto's slopes
Modeling the formation of N2 and CH4 frost on Pluto's slopes Open
Context:Previous studies suggested that these frosts could result from the peculiar insolation driven by the geometry of these slopes, but this has never been quantitatively tested. We aim to investigate the origin, stability, and potentia…
View article: End-to-end characterization of AAV manufacturing process using charge detection mass spectrometry
End-to-end characterization of AAV manufacturing process using charge detection mass spectrometry Open
Charge detection mass spectrometry (CD-MS) has previously been shown to be effective for analyzing predominantly clean bulk drug substances and drug products of recombinant adeno-associated virus (rAAV). CD-MS holds potential for assessing…
View article: Calculating Occultation Light Curves using Wavelets: Exponential Atmospheres and the Constraints of Static Stability
Calculating Occultation Light Curves using Wavelets: Exponential Atmospheres and the Constraints of Static Stability Open
The signatures of waves are seen during many high-quality ground-based refractive stellar occultations by solar system atmospheres. We present a new forward-modeling technique for ground-based stellar occultations based on wavelet decompos…
View article: A Descriptive Taxonomic Nomenclature for Intermediate-sized Trans-Neptunian Object Spectra
A Descriptive Taxonomic Nomenclature for Intermediate-sized Trans-Neptunian Object Spectra Open
Trans-Neptunian objects (TNOs), icy remnants of planet formation orbiting beyond Neptune, comprise a dynamically and compositionally diverse population of >5000 known members. An extensive body of literature focuses on the dynamical struct…
View article: NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1)
NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1) Open
We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS), with the NSF-DOE Vera C. Rubin Observatory. The third interstellar obj…
View article: Peculiar Ice Patterns in Craters In Bird Planitia and Viking Terra on Pluto
Peculiar Ice Patterns in Craters In Bird Planitia and Viking Terra on Pluto Open
Introduction. New Horizons upended our ideas of volatile transport on Pluto. Pre-encounter models focused on the seasonal migration of N2 between summer and winter poles. These models predicted that in some regions, N2 ice would periodical…
View article: Compositional diversity within the extreme trans-Neptunian object (ETNO) population
Compositional diversity within the extreme trans-Neptunian object (ETNO) population Open
Introduction. Trans-Neptunian objects (TNOs) record the history of planetary migration in their orbital architecture and the chemical diversity of the outer solar system in their largely unaltered surface compositions. Through the large Cy…
View article: Spectroscopic Study of Ice Analogs of Trans-Neptunian Objects Exposed to Ionizing Radiation. II. Infrared Spectra and Functional Groups
Spectroscopic Study of Ice Analogs of Trans-Neptunian Objects Exposed to Ionizing Radiation. II. Infrared Spectra and Functional Groups Open
The surfaces of airless trans-Neptunian objects (TNOs) are subject to continuous ionizing radiation from solar winds and Galactic cosmic rays accompanied by alteration of surface compositions. The crust resulting from chemical reactions an…
View article: Spectroscopic Evolution in Ice Analogs of Trans-Neptunian Objects Exposed to Ionizing Radiation. I. Visible Reflectance Spectra and Colors
Spectroscopic Evolution in Ice Analogs of Trans-Neptunian Objects Exposed to Ionizing Radiation. I. Visible Reflectance Spectra and Colors Open
Trans-Neptunian objects (TNOs) exhibit a color diversity containing a wealth of clues for understanding complex compositions and the formation history of our solar system. The origin of this wide color distribution is still uncertain, but …
View article: Chemical Evolution of Isotopically Labeled Carbon Dioxide (<sup>13</sup>CO<sub>2</sub>) Ice Exposed to Ionizing Radiation and Implications for Trans-Neptunian Objects
Chemical Evolution of Isotopically Labeled Carbon Dioxide (<sup>13</sup>CO<sub>2</sub>) Ice Exposed to Ionizing Radiation and Implications for Trans-Neptunian Objects Open
We present results on the radiation chemistry of isotopically labeled carbon dioxide ( 13 CO 2 ) ices induced by energetic electrons at 40 and 10 K to simulate the chemical evolution of carbon dioxide on trans-Neptunian objects exposed to …
View article: Comprehensive Study of Near-Earth Asteroid 2024 MK: Testing Planetary Encounters as a Source for Surface Refreshing
Comprehensive Study of Near-Earth Asteroid 2024 MK: Testing Planetary Encounters as a Source for Surface Refreshing Open
Near-Earth object 2024 MK was discovered on 2024 June 16, less than 2 weeks before it made a sub-lunar-distance close approach. This close approach provided an ideal opportunity to determine how planetary encounters affect asteroid surface…
View article: Nitrogen Loss from Pluto’s Birth to the Present Day via Atmospheric Escape, Photochemical Destruction, and Impact Erosion
Nitrogen Loss from Pluto’s Birth to the Present Day via Atmospheric Escape, Photochemical Destruction, and Impact Erosion Open
We estimate the loss of nitrogen from Pluto over its lifetime, including the giant planet instability period, which we term the “Wild Years.” We analyze the orbital migration of 53 simulated Plutinos, which are Kuiper Belt Objects (KBOs) c…
View article: Ionizing radiation exposure on Arrokoth shapes a sugar world
Ionizing radiation exposure on Arrokoth shapes a sugar world Open
The Kuiper Belt object (KBO) Arrokoth, the farthest object in the Solar System ever visited by a spacecraft, possesses a distinctive reddish surface and is characterized by pronounced spectroscopic features associated with methanol. Howeve…
View article: Bolometric Hemispherical Albedo Map of Pluto from New Horizons Observations
Bolometric Hemispherical Albedo Map of Pluto from New Horizons Observations Open
The New Horizons encounter with the Pluto system revealed Pluto to have an extremely spatially variable surface with expansive dark, bright, and intermediate terrains, refractory and volatile ices, and ongoing/recent endogenous and exogeno…
View article: Processing of methane and acetylene ices by galactic cosmic rays and implications to the color diversity of Kuiper Belt objects
Processing of methane and acetylene ices by galactic cosmic rays and implications to the color diversity of Kuiper Belt objects Open
Kuiper Belt objects exhibit a wider color range than any other solar system population. The origin of this color diversity is unknown, but likely the result of the prolonged irradiation of organic materials by galactic cosmic rays (GCRs). …
View article: Uranus ring occultation observations: 1977–2006
Uranus ring occultation observations: 1977–2006 Open
The Uranian rings were discovered serendipitously on 10 March 1977 during a stellar occultation (Elliot et al., 1977a; Millis et al., 1977), and a rich set of subsequent Earth-based occultations revealed that these narrow and sharp-edged r…
View article: Impacts of Organic Ice Condensation on the Optical Properties of Haze on Pluto
Impacts of Organic Ice Condensation on the Optical Properties of Haze on Pluto Open
The flyby of the New Horizons spacecraft in 2015 July revealed an unexpected cold atmosphere of Pluto and confirmed the existence of its atmospheric haze. The observed and simulated vertical profiles of chemical species and microphysical p…
View article: A Near-surface Temperature Model of Arrokoth
A Near-surface Temperature Model of Arrokoth Open
A near-surface thermal model for Arrokoth is developed based on the recently released 10 5 facet model of the body. This thermal solution takes into account Arrokoth’s surface reradiation back onto itself. The solution method exploits Arro…
View article: Detection of Radio Thermal Emission from the Kuiper Belt Object (486958) Arrokoth during the New Horizons Encounter
Detection of Radio Thermal Emission from the Kuiper Belt Object (486958) Arrokoth during the New Horizons Encounter Open
The New Horizons spacecraft encountered the Kuiper Belt object (KBO) Arrokoth (486958), originally designated as 2014 MU 69 and formerly called “Ultima Thule,” on 2019 January 01. At 43.3 au from the Sun and 44.4 au from Earth, this was th…
View article: Upper Limits on the Escape of Volatiles from (486958) Arrokoth Using New Horizons Alice Ultraviolet Spectrograph Observations
Upper Limits on the Escape of Volatiles from (486958) Arrokoth Using New Horizons Alice Ultraviolet Spectrograph Observations Open
During the New Horizons flyby of Kuiper Belt object (486958) Arrokoth on 2019 January 1, a search was made for escaping volatiles. Using the Alice spectrograph, appulse observations of both the Sun and the star HD42954 were performed to lo…
View article: A Predicted Dearth of Majority Hypervolatile Ices in Oort Cloud Comets
A Predicted Dearth of Majority Hypervolatile Ices in Oort Cloud Comets Open
We present new, ice species-specific New Horizons/Alice upper gas coma production limits from the 2019 January 1 MU69/Arrokoth flyby of Gladstone et al. and use them to make predictions about the rarity of majority hypervolatile (CO, N 2 ,…
View article: Social Capital and Community Resilience in Tōhoku-Oki: Lessons from the 2011 Great East Earthquake and Tsunami Disaster in Japan
Social Capital and Community Resilience in Tōhoku-Oki: Lessons from the 2011 Great East Earthquake and Tsunami Disaster in Japan Open
This paper investigates experiences of how local cultural norms and social capital influenced the disaster relief process following the 2011 GEJET disaster. To underline social capital’s multiple‐influence aspects, this paper draws f…
View article: The Diverse Shapes of Dwarf Planet and Large KBO Phase Curves Observed from New Horizons
The Diverse Shapes of Dwarf Planet and Large KBO Phase Curves Observed from New Horizons Open
Observing dwarf planets and other large Kuiper Belt objects (KBOs) from vantage points between 8 and 47 au from the Sun, NASA’s New Horizons spacecraft has found diversity in the shapes of their solar phase curves. Here we extend solar pha…
View article: Large-scale cryovolcanic resurfacing on Pluto
Large-scale cryovolcanic resurfacing on Pluto Open
The New Horizons spacecraft returned images and compositional data showing that terrains on Pluto span a variety of ages, ranging from relatively ancient, heavily cratered areas to very young surfaces with few-to-no impact craters. One of …
View article: Anomalous Flux in the Cosmic Optical Background Detected with New Horizons Observations
Anomalous Flux in the Cosmic Optical Background Detected with New Horizons Observations Open
We used New Horizons LORRI images to measure the optical-band (0.4 ≲ λ ≲ 0.9 μ m) sky brightness within a high-galactic-latitude field selected to have reduced diffuse scattered light from the Milky Way galaxy (DGL), as inferred from the I…
View article: New Horizons Detection of the Local Galactic Lyman-α Background
New Horizons Detection of the Local Galactic Lyman-α Background Open
Since 2007 the Alice spectrograph on the New Horizons (NH) spacecraft has been used to periodically observe the Lyman- α (Ly α ) emissions of the interplanetary medium (IPM), which mostly result from resonant scattering of solar Ly α emiss…