Results 51 to 60 of about 4,715,495 (301)

Simulation of the Motion of Stars Escaping from the Galactic Center

Open Astronomy, 2015
Motions of stars escaping from the Galactic center are simulated. It is shown that the Galactic bar reduces the initial velocity needed to escape from the Galaxy.
Shirokova K. S.
doaj   +1 more source

Programming Nanoscale Reaction Environments via Peptide Localization for Gold Nanoparticle Growth in Liposomal Nanoreactors

Advanced Functional Materials, EarlyView.
The liposome nanoreactor method enables uniform metal nanoparticle synthesis using the interior as a reaction environment. We demonstrate that peptide sequences and lipid compositions act as a functional molecular switch to control reaction environments in liposome nanoreactors.
Yuya Abe, Joseph Fox, Zabeada Aslam, Kevin Critchley, Stephen D. Evans, Mina Okochi, Masayoshi Tanaka   +6 more
wiley   +1 more source

ON THE ORIGIN OF THE B-STARS IN THE GALACTIC CENTER [PDF]

The Astrophysical Journal, 2014
We present a new directly-observable statistic which uses sky position and proper motion of stars near the Galactic center massive black hole to identify populations with high orbital eccentricities. It is most useful for stars with large orbital periods for which dynamical accelerations are difficult to determine. We apply this statistic to a data set
Madigan, A., Pfuhl, O., Levin, Y., Gillessen, S., Genzel, R., Perets, H.   +5 more
openaire   +3 more sources

Disorder‐Broadened Topological Hall Phase and Anomalous Hall Scaling in FeGe

Advanced Functional Materials, EarlyView.
By systematically introducing defects into FeGe via ion‐beam modification, we demonstrate that disorder broadens the temperature regime over which the topological Hall effect ‐ a signature of skyrmions or other chiral textures — appears, while also increasing its magnitude.
Chaman Gupta, Chris Matsumura, Hongbin Yang, Sarah Edwards, Rebeca M. Gurrola, Jiun‐Haw Chu, Hanjong Paik, Yongqiang Wang, David A. Muller, Robert Streubel, Tzu‐Ming Lu, Serena Eley   +11 more
wiley   +1 more source

The Galactic Center Lobe as an H ii Region

The Astrophysical Journal
The Galactic center lobe (GCL) is an object ∼1° across that is located north of the Galactic center. In the mid-infrared (MIR) the GCL appears as two 8.0 μ m filaments between which there is strong 24 μ m and radio continuum emission.
L. D. Anderson, Matteo Luisi, B. Liu, Dylan J. Linville, Robert A. Benjamin, Natasha Hurley-Walker, N. M. McClure-Griffiths, Catherine Zucker   +7 more
doaj   +1 more source

On the origin of young stars at the Galactic center [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractThe center of our Galaxy is home to a massive black hole, Sgr A*, and a nuclear star cluster containing stellar populations of various ages. While the late type stars may be too old to have retained memory of their initial orbital configuration, and hence formation mechanism, the kinematics of the early type stars should reflect their original ...
Madigan, A., Pfuhl, O., Levin, Y., Gillessen, S., Genzel, R., Perets, H.   +5 more
openaire   +3 more sources

Bulk‐Like Spin Cycloid and Fast Switching in Freestanding BiFeO3

Advanced Functional Materials, EarlyView.
Freestanding BiFeO3 membranes overcome substrate‐induced constraints by simultaneously restoring the intrinsic bulk‐like spin cycloid and enabling ≈50% faster ferroelectric switching than substrate‐clamped epitaxial thin films. This combination of robust noncollinear antiferromagnetic order and efficient electric‐field switching establishes ...
Pratap Pal, Xiaoxi Deng, Gi‐Yeop Kim, Kyoungjun Lee, Jheng‐Cyuan Lin, Prithwijit Mandal, Jiangfeng Yang, Paul Steadman, Pascal Manuel, Roger D. Johnson, Si‐Young Choi, Paolo G. Radaelli, Chang‐Beom Eom   +12 more
wiley   +1 more source

BlackHoleCam: Fundamental physics of the galactic center [PDF]

International Journal of Modern Physics D, 2017
Einstein’s General theory of relativity (GR) successfully describes gravity. Although GR has been accurately tested in weak gravitational fields, it remains largely untested in the general strong field cases. One of the most fundamental predictions of GR is the existence of black holes (BHs). After the recent direct detection of gravitational waves by
Goddi, C., Falcke, H., Kramer, M., Rezzolla, L., Brinkerink, C., Bronzwaer, T., Davelaar, J. R. J., Deane, R., De Laurentis, M., Desvignes, G., Eatough, R. P., Eisenhauer, F., Fraga-Encinas, R., Fromm, C. M., Gillessen, S., Grenzebach, A., Issaoun, S., Janßen, M., Konoplya, R., Krichbaum, T. P., Laing, R., Liu, K., Lu, R. -S., Mizuno, Y., Moscibrodzka, M., Müller, C., Olivares, H., Pfuhl, O., Porth, O., Roelofs, F., Ros, E., Schuster, K., Tilanus, R., Torne, P., Van Bemmel, I., Van Langevelde, H. J., Wex, N., Younsi, Z., Zhidenko, A.   +38 more
openaire   +12 more sources

Reservoir‐Driven Neuromorphic Computing Based on Composite Rare‐Earth/Transition Metal Oxide Memristor

Advanced Functional Materials, EarlyView.
A defect‐engineered Ag/Gd2O3:Nb2O5/Pt rare earth composite oxide memristor enables stable multilevel reservoir states through pulse driven conductance modulation. Experimentally measured device responses are incorporated into a device aware reservoir computing framework for CIFAR‐100 image classification, highlighting the potential of rare earth ...
Hammad Ghazanfar, Haider Abbas, Muhammad Rabeel, Honggyun Kim, Ghulam Dastgeer, Muhammad Nasim, Furqan Zahoor, Yawar Abbas, Waqas Ahmad, Deok‐kee Kim   +9 more
wiley   +1 more source

Impact of Anisotropic Cosmic-Ray Transport on the Gamma-Ray Signatures in the Galactic Center

The Astrophysical Journal
The very high energy (VHE) emission of the central molecular zone (CMZ) is rarely modeled in 3D. Most approaches describe the morphology in 1D or simplify the diffusion to the isotropic case.
J. Dörner, J. Becker Tjus, P. S. Blomenkamp, H. Fichtner, A. Franckowiak, E. M. Zaninger   +5 more
doaj   +1 more source