Results 71 to 80 of about 2,342,043 (349)

Additive Manufacturing of Hot Work Tool Steel by Laser Powder Bed Fusion Utilizing Powder Mixtures Including Grinding Chips: Assessing Chemical Homogeneity and Achievable Hardness

Advanced Engineering Materials, EarlyView.
Grinding chips of high‐alloyed steel are prepared to be admixed to a starting powder mixture for laser powder bed fusion. A three‐stage preparation is performed, including washing in acetone, magnetic separation, and ball milling. The addition of 30% of grinding chips to the powder mixture allows the fabrication of dense samples.
Felix Großwendt, Chengsong Cui, Jonathan Lentz, Rainer Fechte‐Heinen, Sebastian Weber   +4 more
wiley   +1 more source

Quasiperiodic Oscillations in a Highly Magnetized Ultracompact X-Ray Binary 4U 1626-67

The Astrophysical Journal
We report the detection of mHz quasiperiodic oscillations (QPOs) in four Nuclear Spectroscopic Telescope Array observations of 4U 1626–67 during its recent spin-down episode.
Zi-Yi Zhou, Long Ji, Ling- Da Kong, Sergey S. Tsygankov, Qing-Cang Shui, Lian Tao   +5 more
doaj   +1 more source

The Swift Deep Galactic Plane Survey (DGPS) Phase I Catalog

The Astrophysical Journal Supplement Series, 2023
The Swift Deep Galactic Plane Survey (DGPS) is a Swift Key Project consisting of 380 tiled pointings covering ∼40 deg ^2 of the Galactic plane between longitude 10 < ∣ l ∣ < 30 deg and latitude ∣ b ∣ < 0.5 deg. Each pointing has a 5 ks exposure, yielding
B. O’Connor, C. Kouveliotou, P. A. Evans, N. Gorgone, A. J. van Kooten, S. Gagnon, H. Yang, M. G. Baring, E. Bellm, P. Beniamini, J. Brink, D. A. H. Buckley, S. B. Cenko, O. D. Egbo, E. Göğüş, J. Granot, C. Hailey, J. Hare, F. Harrison, D. Hartmann, A. J. van der Horst, D. Huppenkothen, L. Kaper, O. Kargaltsev, J. A. Kennea, K. Mukai, P. O. Slane, D. Stern, E. Troja, Z. Wadiasingh, R. A. M. J. Wijers, P. Woudt, G. Younes   +32 more
doaj   +1 more source

A RADIO-SELECTED BLACK HOLE X-RAY BINARY CANDIDATE IN THE MILKY WAY GLOBULAR CLUSTER M62 [PDF]

, 2013
We report the discovery of a candidate stellar-mass black hole in the Milky Way globular cluster M62. We detected the black hole candidate, which we call M62-VLA1, in the core of the cluster using deep radio continuum imaging from the Karl G. Jansky Very
L. Chomiuk, J. Strader, T. Maccarone, J. Miller-Jones, C. Heinke, E. Noyola, A. Seth, S. Ransom   +7 more
semanticscholar   +1 more source

Outer jet X-ray and radio emission in R Aquarii: 1999.8 to 2004.0

, 2007
Chandra and VLA observations of the symbiotic star R Aqr in 2004 reveal significant changes over the three to four year interval between these observations and previous observations taken with the VLA in 1999 and with Chandra in 2000.
C. Anderson, E. Kellogg, Hack M., Hunsch M., J. DePasquale, J. L. Sokoloski, J. Nichols, J. Pedelty, K. Korreck, M. Krauss, Paresce F., Solf J., Solf J., Tomov T., Willson L. A.   +14 more
core   +1 more source

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

Advanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu, Jochen Vanderspikken, Paola Mantegazza, Stefania Moro, Mouna Hamid, Sigurd Mertens, Niko Van den Brande, Laurence Lutsen, Vincent Lemaur, David Beljonne, Giovanni Costantini, Koen Vandewal, Bruno Van Mele, Wouter Maes, Bart Goderis   +14 more
wiley   +1 more source

A Comprehensive Study of Thermonuclear X-Ray Bursts from 4U 1820–30 with NICER: Accretion Disk Interactions and a Candidate Burst Oscillation

The Astrophysical Journal
We present the results obtained from timing and spectral studies of 15 thermonuclear X-ray bursts from 4U 1820–30 observed with the Neutron Star Interior Composition Explorer (NICER) during its 5 yr of observations between 2017 and 2022.
Gaurava K. Jaisawal, Z. Funda Bostancı, Tuğba Boztepe, Tolga Güver, Tod E. Strohmayer, David R. Ballantyne, Jens H. Beck, Ersin Göğüş, Diego Altamirano, Zaven Arzoumanian, Deepto Chakrabarty, Keith C. Gendreau, Sebastien Guillot, Renee M. Ludlam, Mason Ng, Andrea Sanna, Jérôme Chenevez   +16 more
doaj   +1 more source

A Remarkable Low-Mass X-Ray Binary within 0.1 Parsecs of the Galactic Center [PDF]

, 2005
Recent X-ray and radio observations by Muno et al. and Bower et al. have identified a transient low-mass X-ray binary (LMXB) located only 0.1 pc in projection from the Galactic center, CXOGC J174540.0-290031.
M. Muno, Jessica R. Lu, F. Baganoff, W. Brandt, G. Garmire, A. Ghez, S. Hornstein, M. Morris   +7 more
semanticscholar   +1 more source

M 33 X-7: ChASeM33 reveals the first eclipsing black hole X-ray binary [PDF]

, 2006
The first observations conducted as part of the Chandra ACIS survey of M 33 (ChASeM33) sampled the eclipsing X-ray binary M 33 X-7 over a large part of the 3.45 d orbital period and have resolved eclipse ingress and egress for the first time.
Ebisawa K., F. Haberl, Haberl F., Haberl F., K. S. Long, M. Sasaki, Massey P., Newton K., P. Ghavamian, P. P. Plucinsky, Predehl P., Sasaki M., T. G. Pannuti, T. J. Gaetz, W. Pietsch, Watarai K.-Y.   +15 more
core   +2 more sources

Nano‐Patterned CuO Nanowire Nanogap Hydrogen Gas Sensor with Voids

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
Sub‐5‐ppb hydrogen (H2) detection and sub‐10‐s response and recovery times are achieved based on nano‐patterned polycrystalline CuO nanowires nanogap gas sensors with voids using electron‐beam lithography and unique annealing processes. Pre‐H2 annealing, void‐generating oxidation, and downscaled nanogap electrodes are key to improving the sensing ...
Muqing Zhao, Ryosuke Nitta, Seiichiro Izawa, Jun‐ichi Yamaura, Yutaka Majima   +4 more
wiley   +1 more source