Seth A. Jacobson

Magnitude of stable iron isotope fractionation limited by multiple stages of terrestrial core formation

Gabriel Nathan, Seth A. Jacobson

us (code pays fourni par la source)

Lithium Enrichment in a Subgiant Star with a Brown Dwarf Companion: A Planetary Engulfment Candidate

Brooke Kotten, Melinda Soares-Furtado, Ricardo Yarza, Andrew C. Nine et autres

Abstract Theoretical models predict that subgiants within a narrow mass regime can retain detectable lithium enrichment signatures from planetary engulfment. We test this prediction using TOI-5882, selected because it occupies this favorable subgiant parameter space and hosts a massive brown dwarf (22 …

us, cl (code pays fourni par la source)

Diverse configurations of binary asteroids explained by multi-generation satellites

Wen-Yue Dai, Bin Kang Cheng, Yukun Huang, Yifei Jiao et autres

Binary asteroid systems are ubiquitous in the Solar System. Many of them originate from rotational breakup, where an asteroid’s spin-up triggers mass shedding and subsequent satellite formation from a transient debris disk. While prolate satellites on compact orbits are expected in this …

cn, jp, fr, us (code pays fourni par la source)

Lithium Enrichment in a Subgiant Star with a Brown Dwarf Companion: A Planetary Engulfment Candidate

Brooke Kotten, Melinda Soares-Furtado, Ricardo Yarza, Andrew C. Nine et autres

Theoretical models predict that subgiants within a narrow mass regime can retain detectable lithium enrichment signatures from planetary engulfment. We test this prediction using TOI-5882, selected because it occupies this favorable subgiant parameter space and hosts a massive brown dwarf ($22 \, …

Lithium Enrichment in a Subgiant Star with a Brown Dwarf Companion: A Planetary Engulfment Candidate

Brooke Kotten, Melinda Soares-Furtado, Ricardo Yarza, Andrew C. Nine et autres

Theoretical models predict that subgiants within a narrow mass regime can retain detectable lithium enrichment signatures from planetary engulfment. We test this prediction using TOI-5882, selected because it occupies this favorable subgiant parameter space and hosts a massive brown dwarf ($22 \, …

us, au (code pays fourni par la source)

Direct contact binary planetesimal formation from gravitational collapse

Jackson Barnes, Stephen R. Schwartz, Seth A. Jacobson

Bilobate contact binaries comprise a significant fraction of the relict Kuiper Belt, which includes the exemplary contact binary (486958) Arrokoth. The surfaces of its lobes contain similar amounts of highly volatile chemical species and few craters, indicating formation in a homogeneous and …

The Surface Mineralogy of the Spinel-rich Asteroids from Mid-infrared Spectroscopy with JWST

Katherine de Kleer, Bethany L. Ehlmann, Seth A. Jacobson, Ian Wong et autres

Abstract The “Barbarian” L-type asteroids are purported to contain a high abundance of calcium–aluminum inclusions (CAIs), the oldest solar system solids, based on the dominance of the mineral spinel in their near-infrared spectra. We observed a sample of five objects of this …

3D Reconstruction of DART Ejecta at Dimorphos Reveals an Anisotropic, Filamentary Structure

J. D. P. Deshapriya, P. H. Hasselmann, I. Gai, E. Dotto et autres

We present a 3D reconstruction of the ejecta plume generated by the DART impact on Dimorphos based on LUKE images acquired by LICIACube. Using adaptive histogram equalization and geometric coregistration from multiple vantage points, we identified and tracked extended ejecta features and …

Direct contact binary planetesimal formation from gravitational collapse

Jackson Barnes, Seth A. Jacobson

ABSTRACT Bilobate contact binaries comprise a significant fraction of the relict Kuiper belt, which includes the exemplary contact binary (486958) Arrokoth. The surfaces of its lobes contain similar amounts of highly volatile chemical species and few craters, indicating formation in a homogeneous …

us, es (code pays fourni par la source)

3D Reconstruction of DART Ejecta at Dimorphos Reveals an Anisotropic, Filamentary Structure

J. D. P. Deshapriya, P. H. Hasselmann, I. Gai, E. Dotto et autres

Abstract We present a 3D reconstruction of the ejecta plume generated by the DART impact on Dimorphos based on LUKE images acquired by LICIACube. Using adaptive histogram equalization and geometric coregistration from multiple vantage points, we identified and tracked extended ejecta features …

Direct contact binary planetesimal formation from gravitational collapse

Jackson Barnes, Seth A. Jacobson, Stephen R. Schwartz

This dataset contains all of the data used to generate the figures for the 2026 publication, Direct contact binary planetesimal formation from gravitational collapse, published in the Monthly Notices of the Royal Astronomical Society: Letters. Data and information for three of the …

us, es (code pays fourni par la source)

Direct contact binary planetesimal formation from gravitational collapse

Jackson Barnes, Seth A. Jacobson, Stephen R. Schwartz

This dataset contains all of the data used to generate the figures for the 2026 publication, Direct contact binary planetesimal formation from gravitational collapse, published in the Monthly Notices of the Royal Astronomical Society: Letters. Data and information for three of the …

us, es (code pays fourni par la source)