Results 81 to 90 of about 3,893,324 (356)
Mass loss from central stars of planetary nebulae [PDF]
International Astronomical Union Colloquium, 1981 AbstractFrom a high resolution spectrum taken with IUE, the central star of the planetary nebula IC 2149 is found to exibit a wind with edge velocity of 1440 ± 100 km s-1. Our preliminary evaluation of the associated mass loss rate gives 10-8 M0 yr-1. Other planetary nebulae nuclei are studied with low resolution IUE spectra and indications are found ...
M. Perinotto +2 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.[001]‐oriented Sb2Se3 film with improved crystallinity and adjusted composition is achieved via a new thermal treatment approach consisting of preliminary annealing of the Sb layer before its selenization. The findings of this work demonstrate enhanced charge carriers' transportation, a stable performance, and an improvement of H2 generation from ...
Magno B. Costa +7 more
wiley +1 more source
The Astrophysical JournalAge-benchmark brown dwarf and planetary-mass-object spectroscopy is key to characterizing substellar evolution. In this paper, we present the JHK medium-resolution ( R ∼ 3000) spectra of 25 7–76 M _Jup (spectral types L3.0–M6.0) brown dwarfs and ...
Elena Manjavacas +5 more
doaj +1 more source
A Survey for Planetary-mass Brown Dwarfs in the Chamaeleon I Star-forming Region [PDF]
, 2017 We have performed a search for planetary-mass brown dwarfs in the Chamaeleon I star-forming region using proper motions and photometry measured from optical and infrared images from the Spitzer Space Telescope, the Hubble Space Telescope, and ground ...
T. Esplin +5 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.While host structures are known to enhance the reversibility and safety of lithium metal deposition, their additional volume and weight often decrease the battery's energy density and specific energy. By combining a lightweight and porous scaffold of electrospun polymer with a thinner separator, this article demonstrates a simultaneous improvement of ...
Lennart Wichmann +6 more
wiley +1 more source
Metallicity Regulates Planet Formation across All Masses
The Astronomical JournalThe role of stellar metallicity in shaping planetary systems is central to our understanding of planet formation. While the core accretion paradigm is widely accepted as the dominant mechanism for forming low- and intermediate-mass planets, the origin of
Max Nguyen, Vardan Adibekyan
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Planetary formation and early phases
Comptes Rendus. Physique, 2023 Planets form in proto-planetary disks. In this review, we describe the structure and properties of such disks, and the various phenomenons that lead to the final product: a planetary system. First, micrometre dust settles and coagulates.
Crida, Aurélien
doaj +1 more source
On the Determination of Planetary Masses [PDF]
Symposium - International Astronomical Union, 1972 A common method of determining the mass of a planet is to solve for the orbit of some other object several times with different trial values for the mass in question. It is pointed out that a parabola fitted to the values of the sums of the squares of the residuals may be used to obtain, not only the planetary mass, but also its probable error. Marsden'
openaire +1 more source
Advanced Functional Materials, EarlyView.This work develops flexible zinc‐ion batteries (FZIBs) using a zincophilic/hydrophobic polymer (thermoplastic polycarbonate‐based polyurethane, TPCU) to protect Zn powder anodes and MXene/Silk (MXS) as flexible current collectors. The designed TPCU‐ZnP@MXS structure enables uniform Zn deposition, yielding dendrite‐free anodes with stable cycling ...
Zixuan Yang +8 more
wiley +1 more source