Normalized angular momentum deficit: a tool for comparing the violence of the dynamical histories of planetary systems [PDF]
Astronomy & Astrophysics, 2020 Context. Population studies of the orbital characteristics of exoplanets in multi-planet systems have highlighted the existence of an anticorrelation between the average orbital eccentricity of planets and the number of planets of their host system, that
D. Turrini, A. Zinzi, J. A. Belinchón
semanticscholar +1 more source
Modeling optical and UV polarization of AGNs. I. Imprints of individual scattering regions [PDF]
, 2005 Context. Spectropolarimetry of AGNs is a powerful tool for studying the structure and kinematics of the inner regions of quasars. Aims. We wish to investigate the effects of various AGN scattering region geometries on the polarized flux. Methods.
R. Goosmann +12 more
semanticscholar +1 more source
The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256–1257 b [PDF]
Astrophysical Journal Letters, 2022 We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a
B. Miles +110 more
semanticscholar +1 more source
About 30% of Sun-like Stars Have Kepler-like Planetary Systems: A Study of Their Intrinsic Architecture [PDF]
Astrophysical Journal, 2018 We constrain the intrinsic architecture of Kepler planetary systems by modeling the observed multiplicities of the transiting planets (tranets) and their transit timing variations (TTVs).
W. Zhu 祝 +4 more
semanticscholar +1 more source
The path to instability in compact multi-planetary systems
Astronomy & Astrophysics, 2020 The dynamical stability of tightly packed exoplanetary systems remains poorly understood. While a sharp stability boundary exists for a two-planet system, numerical simulations of three-planet systems and higher show that they can experience instability ...
A. Petit +3 more
semanticscholar +1 more source
SOAR TESS Survey. I. Sculpting of TESS Planetary Systems by Stellar Companions [PDF]
Astronomical Journal, 2019 The Transiting Exoplanet Survey Satellite (TESS) is finding transiting planet candidates around bright, nearby stars across the entire sky. The large field of view, however, results in low spatial resolution; therefore, multiple stars contribute to ...
C. Ziegler +5 more
semanticscholar +1 more source
Survivability of planetary systems in young and dense star clusters [PDF]
Astronomy & Astrophysics, 2019 Aims. We perform a simulation using the Astrophysical Multipurpose Software Environment of the Orion Trapezium star cluster in which the evolution of the stars and the dynamics of planetary systems are taken into account. Methods.
A. V. Elteren +4 more
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Geochemistry, Geophysics, Geosystems, 2023 To assess the paleo‐permeability structure of oceanic crust, we used 3‐D X‐ray Computed Tomography (XCT) images to quantify the distribution and geometry of mineral veins in core samples from Oman Drilling Project Holes GT1A, GT2A, and GT3A, which ...
Y. Akamatsu +3 more
doaj +1 more source
The Exoplanet Population Observation Simulator. I. The Inner Edges of Planetary Systems [PDF]
Astronomical Journal, 2018 The Kepler survey provides a statistical census of planetary systems out to the habitable zone. Because most planets are non-transiting, orbital architectures are best estimated using simulated observations of ensemble populations.
G. Mulders +3 more
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The Deuterium Isotopic Ratio of Water Released From the Martian Caps as Measured With TGO/NOMAD
Geophysical Research Letters, 2022 We report vertical profiles of water and D/H for one Martian year as measured with the TGO/NOMAD instrument. The observations were performed via solar occultation, providing water profiles up to ∼100 km and D/H up to ∼60 km, with a vertical resolution of
Geronimo L. Villanueva +20 more
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