Results 21 to 30 of about 965 (107)

A Search for Magnetically Active Binary Counterparts to Chandra X-Ray Sources in 47 Tucanae with HST Imaging

The Astrophysical Journal
Using Hubble Space Telescope (HST) imaging, we searched for candidate magnetically active binary (AB) counterparts to low-luminosity Chandra X-ray sources in the globular cluster 47 Tucanae (NGC 104). We consider the catalog of 300 Chandra sources within
Haldan N. Cohn, Phyllis M. Lugger, Craig O. Heinke, Maureen van den Berg, Liliana Rivera Sandoval, Jay Anderson   +5 more
doaj   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Simple stellar population models including blue stragglers

, 2010
Observations show that nearly all star clusters and stellar populations contain blue straggler stars (BSs). BSs in a cluster can significantly enhance the integrated spectrum of the host population, preferentially at short wavelengths, and render it much
de Grijs, Richard, Deng, Licai, Kroupa, Pavel, Xin, Yu   +3 more
core   +1 more source

Signatures of Edge States in Antiferromagnetic Van der Waals Josephson Junctions

Advanced Materials, EarlyView.
ABSTRACT The combination of superconductivity and magnetic textures leads to unconventional superconducting phenomena, including new correlated and topological phases. Van der Waals (vdW) materials emerge as a versatile platform for exploring the interplay between these two competing orders.
Celia González‐Sánchez, Ignacio Sardinero, Jorge Cuadra, Alfredo Spuri, José A. Moreno, Hermann Suderow, Elke Scheer, Pablo Burset, Angelo Di Bernardo, Rubén Seoane Souto, Eduardo J. H. Lee   +10 more
wiley   +1 more source

WIYN Open Cluster Study. XC. Radial-velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 2506

The Astronomical Journal
NGC 2506 is a rich, intermediate-age (2.0 Gyr), metal-poor ([Fe/H] ∼ −0.2) open cluster. This work presents the results of 12,157 spectroscopic radial-velocity measurements of 2442 stars in the NGC 2506 field obtained over 41 yr, made as part of the WIYN
Evan Linck, Robert D. Mathieu, David W. Latham   +2 more
doaj   +1 more source

Mass Transfer by Stellar Wind

, 2014
I review the process of mass transfer in a binary system through a stellar wind, with an emphasis on systems containing a red giant. I show how wind accretion in a binary system is different from the usually assumed Bondi-Hoyle approximation, first as ...
A. A. Bonačić Marinović, A. A. Tyndall, A. C. Raga, A. I. Karakas, A. Jorissen, A. Jorissen, A. Jorissen, A. Jorissen, A. M. Geller, B. Jahanara, B. Miszalski, B. Miszalski, B. Miszalski, B. Miszalski, B. Miszalski, B. Paczyński, B. Warner, C. A. Tout, C. Abate, C. Jaschek, D. L. Mitchell, D. Raghavan, D. W. Schuerman, E. Böhm-Vitense, E. Shima, F. Hoyle, H. Bondi, H. Bondi, H. E. Bond, H. Isaka, H. M. J. Boffin, H. M. J. Boffin, H. M. J. Boffin, H. M. J. Boffin, H. M. J. Boffin, H. M. J. Boffin, H. M. J. Boffin, H. Winckel Van, I. Hachisu, J. A. Cliffe, J. Mikolajewska, J.-C. Mermilliod, J.-C. Passy, L. Brookshaw, M. Maercker, M. Plavec, M. Ruffert, N. Blind, O. Marco De, P. K. Lü, P. M. Ricker, P. P. Eggleton, R. D. Jeffries, R. D. McClure, R. D. McClure, R. Hunt, R. J. Rosa De, R. L. M. Corradi, R. O. Gray, S.S. Huang, T. Dermine, T. Matsuda, T. Matsuda, T. Nagae, T. Theuns, T. Theuns, W. P. Bidelman, W. P. Bidelman, W. Packett, Z. Kopal   +69 more
core   +1 more source

Thermal‐Driven Diode Polarity Switching From Competing Helical Superconducting States in WTe2/α‐Fe2O3 Heterostructures

Advanced Materials, EarlyView.
A Nb‐proximitized Josephson junction based on a WTe2/α‐Fe2O3 heterostructure exhibits a robust superconducting diode effect with programmable polarity. The diode direction can be trained by magnetic fields and switched by temperature cycling, revealing tunable finite‐momentum pairing states and competing superconducting states in symmetry‐broken ...
Enze Zhang, Grant Z. X. Yang, Zi‐Ting Sun, Xinhou Chen, Shishun Zhao, Chufan Chen, Chenhui Zhang, Fanrui Hu, K. T. Law, Hyunsoo Yang   +9 more
wiley   +1 more source

A Thorough Exploration of the Metal-rich Massive Open Cluster NGC 6253: Focusing on Membership, Binaries, Stragglers, and Mass Function

The Astrophysical Journal
This study provides an in-depth analysis of the ancient open galactic cluster NGC 6253, characterized by the presence of both blue and yellow straggler stars.
Huanbin Chi, Feng Wang
doaj   +1 more source

Blue Straggler Stars: Early Observations that Failed to Solve the Problem

, 2014
In this chapter, I describe early ideas on blue stragglers, and various observations (some published, some not) that promised but failed to resolve the question of their origin.
A. Miglio, A. R. Sandage, A. R. Sandage, A. R. Sandage, A. Sarajedini, B. Margon, B. Niss, C. A. Murray, C. D. Bailyn, D. C. Morton, D. Pooley, E. M. Burbidge, F. Fusi Pecci, F. Hoyle, F. Paresce, F. R. Ferraro, G. Meynet, G. W. Preston, H. C. Arp, H. C. Arp, H. C. Arp, H. E. Bond, H. E. Bond, H. L. Johnson, H. Spinrad, I. Iben, J. A. Ahumada, J. A. Crawford, J. C. Wheeler, J. Smak, K. A. Montgomery, K. C. Freeman, K. M. Cudworth, L. L. Stryker, M. Livio, N. G. Roman, O. J. Eggen, O. J. Eggen, O. J. Eggen, O. J. Eggen, P. Guhathakurta, P. Hut, P. J. T. Leonard, P. Pesch, R. D. Cannon, R. D. Cannon, R. D. Cannon, R. D. Cannon, R. N. Manchester, R. P. Kraft, R.E. Cohen, T. A. Smecker-Hane, T. D. Kinman, V. Trimble, V. Trimble, W Hiltner, W. H. McCrea, W.L. W. Sargent, Y. Xin, Z. Kopal   +59 more
core   +1 more source

Post-AGB Stars in Globular Clusters and Galactic Halos [PDF]

, 2001
We discuss three aspects of post-AGB (PAGB) stars in old populations. (1) HST photometry of the nucleus of the planetary nebula (PN) K 648 in the globular cluster (GC) M15 implies a mass of 0.60 Msun, in contrast to the mean masses of white dwarfs in GCs
A Renzini, D Schönberner, D Schönberner, DR Alves, DR Alves, E Vassiliadis, FC Gillett, FG Pease, G Gonzalez, GH Jacoby, HB Richer, HE Bond, HE Bond, T Blöcker   +13 more
core   +3 more sources