Results 101 to 110 of about 249,451 (349)

A Surprising Lack of LGRB Metallicity Evolution with Redshift

, 2019
Recent additions to the population of Long-duration Gamma Ray Burst (LGRB) host galaxies with measured metallicities and host masses allow us to investigate how the distributions of both these properties change with redshift. We form a sample out to z of
Fruchter, A. S., Graham, J. F., Schady, P.   +2 more
core  

The stellar metallicity distribution in intermediate latitude fields with BATC and SDSS data

, 2011
Based on the Beijing-Arizona-Taiwan-Connecticut (BATC) and Sloan Digital Sky Survey (SDSS) photometric data, we adopt SEDs fitting Method to evaluate the metallicity distribution for \sim40,000 main-sequence stars in the Galaxy.
AK, AK, Allende-Prieto, Bahcall, Belokurov, Bilir, Bullock, Carollo, Chen, Chen, Cuihua Du, De Jong, Du, Du, Du, Fan, Freeman, Friel, Fukugita, Gilmore, Gilmore, Gilmore, Gilmore, Gunn, Hogg, Ivezic, Ivezic, Juric, Karaali, Karaali, Karaali, Karatas, Klement, Kroupa, Lang, Lejeune, Lemon, Majewski, Majewski, Newberg, Ojha, Oke, Ratnatunga, Rocha-Pinto, Sandage, Searle, Siegel, Trefzger, Vivas, Xiyan Peng, Yanny, Yanny, Yaz, Yoss, Zhenyu Wu, Zhou, Zhou   +56 more
core   +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

Ultra-faint dwarf galaxies as a test of early enrichment and metallicity-dependent star formation

, 2011
The tight relation of star formation with molecular gas indicated by observations and assumed in recent models implies that the efficiency with which galaxies convert their gas into stars depends on gas metallicity.
Andrey V. Kravtsov, Aykutalp, Bigiel, Bigiel, Bolatto, Brooks, Carrera, Chen, Dalcanton, Gnedin, Gnedin, Gnedin, Gnedin, Helmi, Kalirai, Karlsson, Kirby, Komatsu, Konstantinos Tassis, Kravtsov, Kravtsov, Krumholz, Krumholz, Krumholz, Krumholz, Kuhlen, Lee, Leroy, Nickolay Y. Gnedin, Ostriker, Prochaska, Rafelski, Rudd, Simon, Simon, Spaans, Tassis, Tassis, Tremonti, Wise, Wolfire, Wong, Wong, Zemp   +43 more
core   +1 more source

Interaction of MgO Recyclate‐Based Cermet Anode With KF‐AlF3‐Al2O3 at 800°C During Laboratory Scale Aluminum Molten Salt Electrolysis

Advanced Engineering Materials, EarlyView.
A carbon‐free, as‐sintered MgO–steel cermet anode, fabricated via cold isostatic pressing using MgO–C refractory recyclate, was evaluated under laboratory‐scale K‐cryolite electrolysis at 800°C. Operation at this reduced temperature, combined with the electrolyte's limited electrical conductivity, led to an increase in cell voltage.
Farhan Hossain, Alexander Adamczyk, Felipe Alejandro Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Luminous Blue Variable Stars In The Two Extremely Metal-Deficient Blue Compact Dwarf Galaxies DDO 68 and PHL 293B

, 2008
We present photometric and spectroscopic observations of two luminous blue variable (LBV) stars in two extremely metal-deficient blue compact dwarf (BCD) galaxies, DDO 68 with 12+logO/H = 7.15 and PHL 293B with 12+logO/H = 7.72.
Conti, Crowther, Drissen, Guseva, Izotov, Izotov, Izotov, Izotov, Legrand, Massey, Petit, Pustilnik, Smith, Thuan, Trinh X. Thuan, Walborn, Yuri I. Izotov   +16 more
core   +1 more source

Toward Low‐Consumable Anodes: Process Simulation and Prospective Life Cycle Assessment of NiFe2O4‐NiO‐Ni‐Cu vs. Prebaked Anodes for Aluminum Production with use of Molten Salt Electrolysis

Advanced Engineering Materials, EarlyView.
Low‐consumable nickel ferrite‐based anodes for the Hall–Héroult process are compared with conventional prebaked carbon anodes using thermodynamic simulation and prospective life cycle assessment under contrasting future electricity system pathways from 2025 to 2050.
Felipe Alejandro Garcia Paz, Ulziikhuu Otgonbayar, Alexander Adamczyk, Farhan Hossain, Daniel Vogt, Johan Berg Pettersen, Alexandros Charitos   +6 more
wiley   +1 more source

Not Just Winds: Why Models Find That Binary Black Hole Formation Is Metallicity-dependent, while Binary Neutron Star Formation Is Not

The Astrophysical Journal
Both detailed and rapid population studies alike predict that binary black hole (BHBH) formation is orders of magnitude more efficient at low metallicity than high metallicity, while binary neutron star (NSNS) formation remains mostly flat with ...
L. A. C. van Son, S. K. Roy, I. Mandel, W. M. Farr, A. Lam, J. Merritt, F. S. Broekgaarden, A. A. C. Sander, J. J. Andrews   +8 more
doaj   +1 more source

Towards Defect Phase Diagrams: From Research Data Management to Automated Workflows

Advanced Engineering Materials, EarlyView.
A research data management infrastructure is presented for the systematic integration of heterogeneous experimental and simulation data required for defect phase diagrams. The approach combines openBIS with a companion application for large‐object storage, automated metadata extraction, provenance tracking and federated data access, thereby supporting ...
Khalil Rejiba, Sang‐Hyeok Lee, Christina Gasper, Martina Freund, Sandra Korte‐Kerzel, Ulrich Kerzel   +5 more
wiley   +1 more source

Understanding Stellar Mass–Metallicity and Size Relations in Simulated Ultrafaint Dwarf Galaxies

The Astrophysical Journal
Reproducing the physical characteristics of ultrafaint dwarf galaxies (UFDs) in cosmological simulations is challenging, particularly with respect to stellar metallicity and galaxy size.
Minsung Go, Myoungwon Jeon, Yumi Choi, Nitya Kallivayalil, Sangmo Tony Sohn, Gurtina Besla, Hannah Richstein, Sal Wanying Fu, Tae Bong Jeong, Jihye Shin   +9 more
doaj   +1 more source