Results 41 to 50 of about 3,808,369 (275)

TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit

open access: yesThe Astrophysical Journal Letters, 2023
Warm Jupiters are close-in giant planets with relatively large planet–star separations (i.e., 10 < a / R _⋆ < 100). Given their weak tidal interactions with their host stars, measurements of stellar obliquity may be used to probe the initial obliquity ...
Jiayin Dong   +33 more
doaj   +1 more source

Gas phase ion species released during grain collisions: Implications for protoplanetary disks

open access: yesAstronomy & Astrophysics
Grain charging and gas ionization are important processes in protoplanetary disks. Both occur in mutual collisions between grains, as charge is exchanged between grain surfaces but also released into the surrounding gas as ions.
Hock P., Wurm G.
doaj   +1 more source

Disk-planet interaction: theory confronts observations

open access: yes, 2018
Recent spectacular high resolution observations of gaps and ring-like structures in nearby dusty protoplanetary disks have revived interest in studying gap-opening mechanisms.
Dipierro, Giovanni   +1 more
core   +1 more source

Dynamics of the TWA 7 planetary system and possibility of an additional planet

open access: yesAstronomy & Astrophysics
Context. The debris disk surrounding the young star TWA 7 exhibits morphological features that tightly constrain its planetary architecture. JWST/MIRI observations have recently revealed a directly imaged outer planet orbiting at a large separation.
Lacquement A.   +3 more
doaj   +1 more source

Synthesis of Ti2B2Clx MBenes in Molten Salts From Theoretical and Experimental Perspectives

open access: yesAdvanced Materials, EarlyView.
By integrating a theoretical framework with experiments, Ti2InB2 was selectively etched with ZnCl2 to produce a multilayer (ml) Ti2B2Clx MBene. The In atoms are completely removed, with simultaneous incorporation of chlorine surface terminations. in situ x‐ray diffraction indicates a direct biphasic transformation from Ti2InB2 to ml‐MBene, with no ...
Rodrigo M. Ronchi   +15 more
wiley   +1 more source

Coplanar Circumbinary Planets Can Be Unstable to Large Tilt Oscillations in the Presence of an Inner Polar Planet

open access: yesThe Astrophysical Journal Letters, 2023
Mutually misaligned circumbinary planets may form in a warped or broken gas disk or from later planet–planet interactions. With numerical simulations and analytic estimates we explore the dynamics of two circumbinary planets with a large mutual ...
Anna C. Childs   +4 more
doaj   +1 more source

RAPID: A fast, high resolution, flux-conservative algorithm designed for planet–disk interactions [PDF]

open access: yesNew Astronomy, 2009
We describe a newly developed hydrodynamic code for studying accretion disk processes. The numerical method uses a finite volume, nonlinear, Total Variation Diminishing (TVD) scheme to capture shocks and control spurious oscillations. It is second-order accurate in time and space and makes use of a FARGO-type algorithm to alleviate Courant-Friedrichs ...
Mudryk, L. R., Murray, N. W.
openaire   +2 more sources

Highly Efficient Functionalization of hBN With Lithium Oxalate: A Multifunctional Platform for Composites, Ion Transport, and Spin Labeling

open access: yesAdvanced Materials, EarlyView.
Mechanochemical functionalization of hexagonal boron nitride with lithium oxalate produces LBNCO (Li2(BN)6C2O4${\mathrm{Li}}_{2}{\operatorname{(}\mathrm{BN})}_{6}{\mathrm{C}}_{2}{\mathrm{O}}_{4}$), a layered, intrinsically lithiated material that combines Li+${\rm Li}^+$ transport with high thermal stability and persistent paramagnetic centers.
Bence G. Márkus   +20 more
wiley   +1 more source

Life‐Like Ferrous Oxide Microspheres from Kombucha

open access: yesAdvanced Materials Interfaces, EarlyView.
Kombucha bacterial cellulose, sodium alginate, and ferrous nitrate self‐assemble into membrane‐enclosed iron oxide microspheres. These microspheres bud daughter vesicles, sustain 24‐h electrochemical oscillations, and filter theta‐band signals.
Panagiotis Mougkogiannis   +2 more
wiley   +1 more source

Pursuing the planet-debris disk connection: analysis of upper limits from the Anglo-Australian planet search

open access: yes, 2015
All rights reserved.Solid material in protoplanetary disks will suffer one of two fates after the epoch of planet formation; either being bound up into planetary bodies, or remaining in smaller planetesimals to be ground into dust.
Marshall, Jonathan P.   +1 more
core   +1 more source

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