Results 171 to 180 of about 44,379 (345)

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

PyEMILI: A New Generation Computer-aided Spectral Line Identifier

The Astrophysical Journal Supplement Series
Deep high-dispersion spectroscopy of Galactic photoionized gaseous nebulae, mainly planetary nebulae and H ii regions, has revealed numerous emission lines.
Zhijun Tu, Xuan Fang, Robert Williams, Jifeng Liu   +3 more
doaj   +1 more source

Outflowing shocked gas dominates the NIR H2 emission from the dual AGN NGC 6240

Astronomy & Astrophysics
We present a multi-line study of the kinematics of the molecular and ionised gas phases in the central ∼2 kpc of the luminous infrared galaxy and dual active galactic nucleus (AGN) NGC 6240, based on archival JWST/NIRSpec and ALMA observations.
Carlsen J., Cicone C., Hagedorn B., Rubinur K., Andreani P., Dasyra K., Severgnini P., Vignali C., Morganti R., Oosterloo T., Lasrado A., Lopez-Rodriguez E., Shen S.   +12 more
doaj   +1 more source

B-type emission-line stars with warm circumstellar dust [PDF]

, 2000
We selected a group of 11 B-type emission-line stars with large IR excesses, which show a steep flux decrease towards longer wave-lengths. Analysis of their observational characteristics has been carried out on the basis of the data collected from ...
Miroshnichenko, Anatoly S., NC DOCKS at The University of North Carolina at Greensboro   +1 more
core  

Planetary nebulae in the direction of the Galactic bulge: on nebulae with emission-line central stars

, 2009
Aims. We present a homogeneous set of spectroscopic measurements secured with 4-m class telescopes for a sample of 90 planetary nebulae (PNe) located in the direction of the Galactic bulge. Methods.
Chiappini, Cristina, Stasinska, Grazyna, C. Chiappini, S. K. Górny, Górny, S. K., Cuisinier, F., G. Stasińska, F. Cuisinier   +7 more
core   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Rotation and Hα Emission in a Young SMC Cluster: A Spectroscopic View of NGC 330

The Astrophysical Journal
We present an analysis of high-resolution optical spectra recorded for 30 stars of the split extended main-sequence turnoff of the young (∼40 Myr) Small Magellanic Cloud globular cluster NGC 330.
Paul I. Cristofari, Andrea K. Dupree, Antonino P. Milone, Matthew G. Walker, Mario Mateo, Aaron Dotter, John I. Bailey III   +6 more
doaj   +1 more source

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source

A complete survey of mm line emission from CO and ¹³CO in water fountain stars [PDF]

, 2011
J. R. Rizzo, José F. Gómez, L. F. Miranda, Mayra Osorio, Olga Suárez   +4 more
openalex   +1 more source

The CHARA Array Interferometric Program on the Multiplicity of Classical Be Stars: New Detections and Orbits of Stripped Subdwarf Companions

The Astrophysical Journal
Rapid rotation and nonradial pulsations enable Be stars to build decretion disks, where the characteristic line emission forms. A major but unconstrained fraction of Be stars owe their rapid rotation to mass and angular momentum transfer in a binary. The
Robert Klement, Thomas Rivinius, Douglas R. Gies, Dietrich Baade, Antoine Mérand, John D. Monnier, Gail H. Schaefer, Cyprien Lanthermann, Narsireddy Anugu, Stefan Kraus, Tyler Gardner   +10 more
doaj   +1 more source