Results 171 to 180 of about 199,190 (345)
ABYSS. III. Observing Accretion Activity in Young Stars Through Empirical Veiling Measurements
The Astronomical JournalStellar accretion plays an important role in the early stages of stellar evolution, particularly in Classical T Tauri Stars (CTTSs). Accretion of a CTTS can be related to different physical parameters such as effective temperature ( T _eff ), age ...
Serat Saad +7 more
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Hα Emission-Line Stars in M33 [PDF]
Symposium - International Astronomical Union, 1991 C. Neese, T. E. Armandroff, P. Massey
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Advanced Engineering Materials, EarlyView.This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff +9 more
wiley +1 more source
Line Emission from Gas in Optically Thick Dust Disks around Young Stars [PDF]
, 2008 Uma Gorti, D. J. Hollenbach
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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 +9 more
wiley +1 more source
The Astrophysical Journal LettersCosmic hydrogen reionization and cosmic production of the first metals are major phase transitions of the Universe occurring during the first billion years after the Big Bang; however, these are still underexplored observationally. Using the JWST/NIRSpec
Xin Wang +14 more
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The Astrophysics of Emission-Line Stars [PDF]
, 2007 Tomokazu Kogure, Kam-Ching Leung
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Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May +9 more
wiley +1 more source
Bloated stars as AGN broad-line clouds: the emission-line response to continuum variations [PDF]
, 1997 Alexander Turra
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Searching for Phase-Locked Variations of the Emission-Line Profiles in Binary Be Stars [PDF]
, 2023 А. С. Мирошниченко +12 more
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