Results 111 to 120 of about 5,356 (321)

Blue Straggler in the Making: An X-Ray Active Binary in Algol Configuration

The Astrophysical Journal Letters
We report an extremely rare X-ray active blue straggler star (BSS) in Collinder 261, undergoing ongoing Roche-lobe overflow in a semidetached binary in an Algol-type configuration with an orbital period of P _orb  ∼ 2.112 days, providing direct ...
A. H. Sheikh, Biman J. Medhi, Annapurni Subramaniam, Sergio Messina, Susmita Das, Hitendra Sarkar, Anupam Bhardwaj, Atila Poro, Marina Kounkel, Ram Sagar   +9 more
doaj   +1 more source

Data‐Driven Review and Machine Learning Prediction of Diamond Vacancy Center Synthesis

Advanced Intelligent Systems, EarlyView.
A machine learning framework is applied to photoluminescence spectra to extract linewidths and uncover how NV, SiV, GeV, and SnV centers evolve with growth and processing conditions. Unified normalization and k‐fold validation reveal cross‐method trends and enable rapid prediction of defect size and fabrication parameters, offering a data‐driven route ...
Zhi Jiang, Marco Peres, Carlo Bradac, Gil Gonçalves   +3 more
wiley   +1 more source

A proper motion study of the globular cluster M55

, 2011
We have derived the absolute proper motion (PM) of the globular cluster M55 using a large set of CCD images collected with the du Pont telescope between 1997 and 2008. We find (PM_RA*cos(DEC), PM_DEC) = (-3.31 +/- 0.10, -9.14 +/- 0.15) mas/yr relative to
Anderson, Bellini, Clement, Dinescu, Dinescu, Harris, I. B. Thompson, Ibata, Ibata, J. Kaluzny, K. Zloczewski, Kaluzny, Kaluzny, Lanzoni, Mateo, Montalto, Olech, Peng, Platais, Platais, Pryor, Pych, Sollima, Stetson, Yadav, Zacharias   +25 more
core   +1 more source

The spectra and ages of blue stragglers

The Astrophysical Journal, 1985
A mechanism similar to Wheeler's quasi-homogeneous evolution and Finzi and Wolf's proposal for blue stragglers is proposed as the origin of the blue stragglers in intermediate-age clusters. Blue stragglers are stars whose positions in color-magnitude diagrams of open and globular clusters are significantly above the turn-off points and in the region of
openaire   +1 more source

Modular Electronic Microrobots With Onboard Sensor‐Program‐Steered Locomotion

Advanced Intelligent Systems, EarlyView.
Modular electronic smartlet microrobots integrate ambient‐light energy harvesting, photodetection, programmable CMOS control, and bubble‐based actuation within a sub‐millimeter fold‐up architecture. A 58‐bit on‐board CMOS chiplet enables sensor–program steered switching between independently addressable actuators, achieving closed‐loop 2D navigation in
Vineeth K. Bandari, Yeji Lee, Pranathi Adluri, Daniil Karnaushenko, Dmitriy D. Karnaushenko, John S. McCaskill, Oliver G. Schmidt   +6 more
wiley   +1 more source

The Blue Straggler Star population in NGC6229

The Monthly Notices of the Royal Astronomical Society , 2012
We have used a combination of high-resolution Hubble Space Telescope Wide Field Planetary Camera 2 and wide-field ground-based observations in ultraviolet and optical bands to study the blue straggler star (BSS) population of the outer halo globular cluster NGC 6229 over its entire radial extent.
SANNA, NICOLETTA, DALESSANDRO, EMANUELE, LANZONI, BARBARA, FERRARO, FRANCESCO ROSARIO, G. Beccari, R. T. Rood   +5 more
openaire   +1 more source

Imaging and Linking Spatial Magnetic Nanoparticle Distribution to Microbead Torques Using Soft X‐Ray Laminography

Advanced Physics Research, EarlyView.
Nanoscale 3D imaging of superparamagnetic microbeads via soft X‐ray laminography reveals the structural origin of the observed torques in cell movement experiments. These microbeads are found to have an uneven distribution of magnetic magnetite nanoparticles.
Findan Block, Finn Klingbeil, Dennis Seidler, Christine Arndt, Sandra Sindt, Katharina Witte, Benjamin Watts, Jörg Raabe, Christine Selhuber‐Unkel, Jeffrey McCord   +9 more
wiley   +1 more source

k‐Selective Electrical‐to‐Magnon Transduction with Finite‐Element‐Resolved Sub‐Micron Nanoantennas

Advanced Physics Research, EarlyView.
We introduce a coupled finite‐element‐finite‐difference framework that links impedance‐matched nanoantenna geometries to propagating spin‐wave dynamics, capturing skin effects, proximity effects, and taper leakage beyond uniform‐current models. Applied to coplanar‐waveguide and stripline nanoantennas on yttrium‐iron‐garnet, the simulations achieve ...
Andreas Höfinger, Andrey A. Voronov, David Schmoll, Sabri Koraltan, Florian Bruckner, Claas Abert, Dieter Suess, Morris Lindner, Timmy Reimann, Carsten Dubs, Andrii V. Chumak, Sebastian Knauer   +11 more
wiley   +1 more source

The origin of the two populations of blue stragglers in M30

, 2018
We analyze the position of the two populations of blue stragglers in the globular cluster M30 in the Hertzsprung-Russell diagram. Both populations of blue stragglers are brighter than the cluster's turn-off, but one population (the blue blue-stragglers ...
Zwart, Simon Portegies
core   +1 more source

Discovery of a double sequence of blue straggler stars in the core-collapsed globular cluster NGC 6256 [PDF]

, 2022
Mario Cadelano, F. R. Ferraro, E. Dalessandro, B. Lanzoni, Cristina Pallanca, Sara Saracino   +5 more
openalex   +1 more source