Results 71 to 80 of about 28,214 (291)

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Slant, Fan, and Narrow: The Response of Stellar Streams to a Tilting Galactic Disk

The Astrophysical Journal
Stellar streams are sensitive tracers of the gravitational potential, which is typically assumed to be static in the inner Galaxy. However, massive mergers like Gaia-Sausage-Enceladus can impart torques on the stellar disk of the Milky Way that result in
Jacob Nibauer, Ana Bonaca, Mariangela Lisanti, Denis Erkal, Zoe Hastings   +4 more
doaj   +1 more source

Stellar Streams as Probes of Dark Halo Mass and Morphology: A Bayesian Reconstruction

, 2011
Tidal streams provide a powerful tool by means of which the matter distribution of the dark matter halos of their host galaxies can be studied. However, the analysis is not straightforward because streams do not delineate orbits, and for most streams ...
A. Varghese, Allgood, Bailin, Belokurov, Bett, Binney, Bullock, Carlberg, Combes, Conn, Conn, Conn, Debattista, Dehnen, Dehnen, Dehnen, Dubinski, Dubinski, Dubinski, Eyre, Eyre, Frenk, G. F. Lewis, Gregory, Grillmair, Grillmair, Helmi, Hoekstra, Ibata, Ibata, Ibata, Iodice, Jing, Kazantzidis, Koposov, Kuijken, Law, Law, Mackey, Majewski, Mandelbaum, Martínez-Delgado, Martínez-Delgado, Martínez-Delgado, Mayer, McConnachie, Merrifield, Mouhcine, Navarro, Newberg, Odenkirchen, Odenkirchen, Olling, O’Brien, O’Brien, O’Brien, O’Brien, Pfenniger, R. Ibata, Read, Sackett, Sackett, Springel, Teuben, White   +64 more
core   +1 more source

Tidal Tails Test the Equivalence Principle in the Dark Sector [PDF]

, 2006
Satellite galaxies currently undergoing tidal disruption offer a unique opportunity to constrain an effective violation of the equivalence principle in the dark sector.
Kamionkowski, Marc, Kesden, Michael
core   +2 more sources

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

StarStream on Gaia: Stream Discovery and Mass-loss Rate of Globular Clusters

The Astrophysical Journal Supplement Series
We apply the automatic stellar stream detection algorithm StarStream to Gaia Data Release 3 and identify 87 stellar streams associated with Galactic globular clusters (GCs), including 34 high-quality cases with median completeness and purity both ...
Yingtian Chen, Oleg Y. Gnedin, Adrian M. Price-Whelan   +2 more
doaj   +1 more source

Re-visiting the relations: Galactic thin disc age-velocity dispersion relation [PDF]

, 2007
The velocity dispersion of stars in the solar neighbourhood thin disc increases with time after star formation. Nordstrom et al. (2004) is the most recent observational attempt to constrain the age-velocity dispersion relation.
Alonso, Baranne, Barbanis, Bensby, Brown, Carlberg, Carlberg, Carr, Chiba, Crawford, De Simone, Dehnen, Dehnen, Dehnen, Dehnen, Edvardsson, ESA, Famaey, Famaey, Freeman, Fuchs, Fux, G. Gilmore, G. M. Seabroke, Gilmore, Girardi, Gomez, Haywood, Holmberg, Huang, Hänninen, Høg, Jenkins, Jenkins, Jørgensen, Kalnajs, Kroupa, Lacey, Lacey, Luri, Mayor, Ng, Nordström, Olsen, Olsen, Olsen, Olsen, Olsen, Olsen, Perryman, Quillen, Quillen, Quillen, Quinn, Reid, Salasnich, Schuster, Seabroke, Sellwood, Sellwood, Skuljan, Sommer-Larsen, Soubiran, Spitzer, Spitzer, Steinmetz, Stromgren, Toth, Valenti, Velazquez, Villumsen, Walker, Wielen, Woolley   +73 more
core   +2 more sources

The Density Structure of Simulated Stellar Streams [PDF]

The Astrophysical Journal, 2020
Abstract Star particles in a set of dense clusters are self-consistently evolved within an LCDM dark matter distribution with an n-body code. The clusters are started on nearly circular orbits in the more massive sub-halos. Each cluster develops a stellar tidal stream, initially within its original sub-halo.
openaire   +2 more sources

Setup‐Optimized Sequencing in Job Shops: Modeling Workstation Productivity and Lateness Behavior

Advanced Engineering Materials, EarlyView.
Setup‐optimized sequencing in job‐shop production creates a trade‐off between productivity improvement and schedule reliability. A WIP‐explicit modeling framework links sequencing‐induced productivity gains and lateness dispersion through the production operating curve.
Friederike Stefanowski, Matthias Schmidt, Peter Nyhuis   +2 more
wiley   +1 more source

The ATLAS3D project - XXIX : The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images [PDF]

, 2014
Date of Acceptance: 25/09/2014Galactic archaeology based on star counts is instrumental to reconstruct the past mass assembly of Local Group galaxies. The development of new observing techniques and data reduction, coupled with the use of sensitive large
Abraham, Alatalo, Alison F. Crocker, Anne-Marie Weijmans, Atkinson, Bakos, Barnes, Bergvall, Bertin, Bertin, Bertin, Bertin, Betoule, Boulade, Braine, Bridge, Brodie, Bullock, Caon, Cappellari, Cappellari, Cappellari, Cappellari, Conselice, Cooper, Crnojević, Cuillandre, D'Souza, Davis, Davor Krajnović, de Jong, Donovan, Duc, Duc, Duc, Duc, Emin Karabal, Emsellem, Emsellem, Eric Emsellem, Ferrarese, Forbes, Frédéric Bournaud, Geha, Harald Kuntschner, Helmi, Huertas-Company, Jablonka, Janowiecki, Jean-Charles Cuillandre, Jedrzejewski, Jeong, Józsa, Kartaltepe, Katherine Alatalo, Kim, Kniazev, Kormendy, La Barbera, Leo Blitz, Leo Michel-Dansac, Lequeux, Lintott, Lisa M. Young, Lotz, Magnier, Malin, Malin, Malin, Marc Sarzi, Marino, Martin Bureau, Martínez-Delgado, Martínez-Delgado, McConnachie, Michard, Michel-Dansac, Michele Cappellari, Mihos, Mihos, Miskolczi, Naab, Nicholas Scott, Oser, P. T. de Zeeuw, Paolo Serra, Paudel, Peng, Pierre-Alain Duc, Raffaella Morganti, Regnault, Richard M. McDermid, Roediger, Roger L. Davies, Sadegh Khochfar, Salim, Sandage, Sandage, Sandin, Sanjaya Paudel, Sarzi, Schweizer, Schweizer, Scott, Serra, Serra, Sheen, Slater, Struck, Sérsic, Tal, Thorsten Naab, Timothy A. Davis, Tom Oosterloo, Toomre, Turnbull, van Dokkum, van Driel, Willett, York, Zackrisson, Zhu, Zibetti   +122 more
core   +5 more sources