Results 101 to 110 of about 265,282 (287)

Inclination dependence of galaxy brightnesses, diameters and average surface brightnesses [PDF]

Monthly Notices of the Royal Astronomical Society, 1991
Several new estimators of inclination dependence of galaxy brightnesses, diameters and average surface brightnesses have been introduced. Estimators from the literature are also reviewed and some of them are shown to be biased. The analysis presented takes into account selection effects which take place in the two most popular kinds of galaxy samples :
openaire   +1 more source

Kinematics of Giant Low Surface Brightness Galaxies [PDF]

International Astronomical Union Colloquium, 1999
AbstractHigh sensitivity H I observations now exist for six giant low surface brightness (LSB) disk galaxies including the two prototypes, Malin 1 (Bothun et al. 1987; Impey & Bothun 1989) and F568-6 (also known as Malin 2; Bothun et al. 1990). Their H I surface brightnesses are generally low, but proportionally not as low as their optical surface ...
openaire   +2 more sources

Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena, Benjamin Bergmann, Michael Zenger   +2 more
wiley   +1 more source

The Connection Between Diffuse Light and Intracluster Planetary Nebulae in the Virgo Cluster

, 2009
We compare the distribution of diffuse intracluster light detected in the Virgo Cluster via broadband imaging with that inferred from searches for intracluster planetary nebulae (IPNe).
Aguerri, Arnaboldi, Arnaboldi, Arnaboldi, Ciardullo, Ciardullo, Ciardullo, Ciardullo, de Vries, Durrell, Feldmeier, Feldmeier, Feldmeier, Feldmeier, Ferguson, Freedman, Freeman, Gerhard, Gnedin, Gonzalez, Gronwall, Heather Morrison, J. Christopher Mihos, Jerjen, John J. Feldmeier, Krick, Malin, Mei, Mihos, Murante, Okamura, Paul Harding, Peimbert, Purcell, Rudick, Rudick, Saha, Schlegel, Steven Janowiecki, Weil, West, Williams, Williams, Witt   +43 more
core   +1 more source

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

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

Relief Effects on the L-Band Emission of a Bare Soil

Remote Sensing, 2015
In a combined experimental and model study, we investigated effects of surface topography (relief) on the thermal L-band emission of a sandy soil. To this end, brightness temperatures of two adjacent footprint areas were measured quasi-simultaneously ...
Ingo Völksch, Mike Schwank, Manfred Stähli, Christian Mätzler   +3 more
doaj   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

New Near-Infrared Surface Brightness Fluctuation Models

, 2005
We present new theoretical models for surface brightness fluctuations in the near-infrared. We show the time evolution of near-infrared brightness fluctuation properties over large age and metallicity ranges, i.e., from 12 Myr to 16 Gyr, and from Z/Zsun ...
Alvarez, Bessell, Bessell, Binney, Blakeslee, Blakeslee, Blöcker, Bower, Bressan, Bruzual, Cantiello, Cerviño, Cohen, Elson, Elson, Fagotto, Fagotto, Fagotto, Ferrarese, Ferraro, Fluks, Frogel, Girardi, González, González, Iben, Jensen, Jensen, Kroupa, Kuntschner, Kurucz, Lançon, Lançon, Lejeune, Lejeune, Liu, Liu, Liu, Loidl, Marigo, Marigo, Matsuura, Mei, Mouhcine, Mouhcine, Mouhcine, Mouhcine, Persson, Renzini, Renzini, Salpeter, Scalo, Schultheis, Searle, Tonry, Tonry, Tonry, Vassiliadis, Wagenhuber, Westera, Worthey, Worthey, Östlin   +62 more
core   +2 more sources

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, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source