Results 61 to 70 of about 551,103 (329)
Using 3.4 μm Variability toward White Dwarfs as a Signpost of Remnant Planetary Systems
The Astrophysical JournalRoughly 2% of white dwarfs harbor planetary debris disks detectable via infrared excesses, but only a few percent of these disks show a gaseous component, distinguished by their double-peaked emission at the near-infrared calcium triplet.
Joseph A. Guidry +5 more
doaj +1 more source
Observations of circumstellar disks in scattered light with SPHERE at the VLT
Comptes Rendus. Physique, 2023 The technological developments initiated in the early 21$^{\rm st}$ century have led to the implementation of “planet finders” instruments on 8-m class telescopes which are in operation since 2014-2015. Such facilities are at the inception of significant
Boccaletti, Anthony
doaj +1 more source
A Different Perspective on the Solid Lubrication Performance of Black Phosphorus: Friend or Foe?
Advanced Engineering Materials, EarlyView.Researchers investigate black phosphorus (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli +5 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Heat treatment parameters critically affect the wear resistance of powder bed fusion–laser beam (PBF‐LB)‐produced Ti–6Al–2Sn–4Zr–6Mo alloy. This study found that optimizing annealing temperature allows to obtain a tailored microstructure, which enhances the dry‐sliding behavior by forming a stable and functional mechanically mixed layer (MML), ensuring
Gianluca Pirro +5 more
wiley +1 more source
The Astrophysical Journal Supplement SeriesDebris disks, which consist of dust, planetesimals, planets, and gas, offer a unique window into the mineralogical composition of their parent bodies, especially during the critical phase of terrestrial planet formation spanning 10 yr to a few hundred ...
Cicero X. Lu +12 more
doaj +1 more source
The Astronomical Journal, 2023 With a Jupiter-like exoplanet and a debris disk with both asteroid and Kuiper Belt analogs, ϵ Eridani has a fascinating resemblance to our expectations for a young solar system.
Schuyler Grace Wolff +4 more
doaj +1 more source
The Incidence of Debris Disks at 24 {\mu}m and 670 Myr [PDF]
, 2012 We use Spitzer Space Telescope 24 {\mu}m data to search for debris disks among 122 AFGKM stars from the \sim 670 Myr clusters Hyades, Coma Ber, and Praesepe, utilizing a number of advances in data reduction and determining the intrinsic colors of main ...
Rieke, George +3 more
core +2 more sources
Advanced Functional Materials, EarlyView.The addition of calcium ions to silk fibroin enhances the hydrogel properties and, when combined with visible light crosslinking, enables compatibility with advanced light‐based fabrication techniques. Calcium ions extend the shelf‐life of silk and facilitate the fabrication of multizonal, multilayered constructs for advanced stimuli‐responsive ...
Hien A. Tran +11 more
wiley +1 more source
JWST/NIRCam Detection of the Fomalhaut C Debris Disk in Scattered Light
The Astrophysical Journal LettersObservations of debris disks offer important insights into the formation and evolution of planetary systems. Though M dwarfs make up approximately 80% of nearby stars, very few M dwarf debris disks have been studied in detail—making it unclear how or if ...
Kellen Lawson +22 more
doaj +1 more source
What Sets the Radial Locations of Warm Debris Disks? [PDF]
, 2017 The architectures of debris disks encode the history of planet formation in these systems. Studies of debris disks via their spectral energy distributions (SEDs) have found infrared excesses arising from cold dust, warm dust, or a combination of the two.
N. Ballering +3 more
semanticscholar +1 more source