Results 91 to 100 of about 1,487,013 (249)
The Astronomical JournalWe present 35 new spectroscopic-binary orbits from our extended radial-velocity (RV) survey of the old (6.4 ± 0.2 Gyr) open cluster NGC 188. Using data from the WIYN Open Cluster Study (WOCS) and APOGEE-2, this work nearly doubles the temporal baseline ...
Ritvik Sai Narayan +3 more
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The Blue Engineer : Engineers with ecological and social responsibility. Issue 02, summer term 2012
, 2014 The Blue Engineer hat sich der Aufgabe widmet, über inner– und außeruniversitäre Themen mit Bezug zu ganzheitlich verstandener Nachhaltigkeit zu berichten.The Blue Engineer is dedicated to the task of reporting about academic and non-academic topics ...
core +1 more source
Self‐Assembled Telecom Color Centers in Silicon and Their Growth Environment
Advanced Physics Research, EarlyView.Influence of the growth pressure during the formation of self‐assembled color centers in silicon grown by molecular beam epitaxy at ultra‐low temperatures on the color center's photoluminescence spectral signature. The growth pressure crucially determines color center selectivity, as evidenced by G‐centers, W‐centers, and T‐centers, matrix purity, and ...
Jacqueline Marböck +9 more
wiley +1 more source
Revisiting the Evidence for Double Sequences of Blue Straggler Stars in Globular Clusters
The Astronomical JournalBlue straggler stars (BSSs) are believed to form through mass transfer in binary systems or stellar collisions. The reported presence of double BSS sequences in some globular clusters (GCs) has been interpreted as evidence that these two formation ...
Gourav Kumawat +7 more
doaj +1 more source
The Blue Engineer : Engineers with ecological and social responsibility. Issue 01, summer term 2012
, 2014 The Blue Engineer hat sich der Aufgabe widmet, über inner– und außeruniversitäre Themen mit Bezug zu ganzheitlich verstandener Nachhaltigkeit zu berichten.The Blue Engineer is dedicated to the task of reporting about academic and non-academic topics ...
core +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 +5 more
openaire +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
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Field population II blue stragglers
The Astrophysical Journal, 1981 Photometry and high-resolution spectra are presented and discussed of metal-poor stars hotter than the turn-off of globular clusters. Very few nonvariable candidates for blue stragglers can be identified One, HD 100363, is probably an old-disk short-period variable.
B. W. Carney, R. C. Peterson
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Two‐Dimensional van der Waals Antiferromagnets: Fabrication, Probes, Control, and Applications
Advanced Physics Research, EarlyView.Two‐dimensional van der Waals antiferromagnets are emerging as versatile platforms for spintronic, optoelectronic, and quantum devices. This review summarizes recent progress in their fabrication, magnetic characterization, fields, interfacial engineering, chemical modification, and representative applications.
Huangyu Wu +10 more
wiley +1 more source
Blue Straggler in the Making: An X-Ray Active Binary in Algol Configuration
The Astrophysical Journal LettersWe 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 +9 more
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