Results 81 to 90 of about 485,760 (336)

Spectroscopy of horizontal branch stars in Omega Centauri

, 2012
We analyze the reddening, surface helium abundance and mass of 115 horizontal branch (HB) and blue hook (BH) stars in OmegaCentauri, spanning the HB from the blue edge of the instability strip to Teff~50000K. The mean cluster reddening is E(B-V)=0.115+-0.
Bidin, C. Moni, Cassisi, S., Moehler, S., Momany, Y., Piotto, G., Villanova, S.   +5 more
core   +1 more source

The Na-O anticorrelation in horizontal branch stars. IV. M22 [PDF]

, 2014
We obtained high-resolution spectra for 94 candidate stars belonging to the HB of M22 with FLAMES.
Bragaglia, A., Carretta, E., Cassisi, S., D'Orazi, V., Gratton, R. G., Lucatello, S., Momany, Y., Salaris, M., Sollima, A., Stetson, P. B.   +9 more
core   +3 more sources

Fluorophobic Effect Enables Selective Detection of PFAS in Water with Electrolyte‐Gated Organic Transistors

Advanced Functional Materials, EarlyView.
PerFluoroAlkyl Substances (PFAS) are responsible of major and persistent environmental pollution worldwide. This work demonstrates an ultra‐sensitive sensor for PFAS based on an organic transistor whose gate is functionalized with a binary self‐assembled monolayer containing a perfluorinated molecule.
Rian Zanotti, Marcello Berto, Matteo Sensi, Alessandro Paradisi, Eleonora Veronese, Lucia Pasquato, Carlo Augusto Bortolotti, Pierangelo Metrangolo, Fabio Biscarini   +8 more
wiley   +1 more source

The peculiar horizontal branch morphology of the Galactic globular clusters NGC 6388 and NGC 6441: new insights from UV observations [PDF]

, 2007
Context. In this paper we present multiband optical and UV Hubble Space Telescope photometry of the two Galactic globular clusters NGC 6388 and NGC 6441. Aims.
Busso, G., Cassisi, S., Castellani, M., Catelan, M., Djorgovski, S. G., Piotto, G., Recio Blanco, A., Renzini, A., Romaniello, M.   +8 more
core  

The Impact of Rotation on the Evolution of Low-Mass Stars

, 2007
High precision photometry and spectroscopy of low-mass stars reveal a variety of properties standard stellar evolution cannot predict. Rotation, an essential ingredient of stellar evolution, is a step towards resolving the discrepancy between model ...
Christopher A. Tout, Daniel Brown, Guenter Houdek, Maurizio Salaris, Rebecca G. Martin, Richard J. Stancliffe   +5 more
core   +1 more source

Magnetic‐Field Tuning of the Spin Dynamics in the Quasi‐2D Van der Waals Antiferromagnet CuCrP2S6

Advanced Functional Materials, EarlyView.
This study reveals 2D character of the spin dynamics in CuCrP2S6, as well as complex field dependence of collective excitations in the antiferromagnetically ordered state. Their remarkable tuning from the antiferromagnetic to the ferromagnetic type with magnetic field, together with the non‐degeneracy of the magnon gaps favorable for the induction of ...
Joyal John Abraham, Yaqian Guo, Yuliia Shemerliuk, Sebastian Selter, Saicharan Aswartham, Kranthi Kumar Bestha, Laura T. Corredor, Anja U. B. Wolter, Olga Kataeva, Luka Rogić, Noah Somun, Damjan Pelc, Oleg Janson, Jeroen van den Brink, Bernd Büchner, Vladislav Kataev, Alexey Alfonsov   +16 more
wiley   +1 more source

Single‐Step Synthesis of In‐plane 1T'‐2H Heterophase MoTe2 for Low‐Resistance Contacts

Advanced Functional Materials, EarlyView.
A single‐step CVD method is developed to synthesize seamless in‐plane 1T'‐2H MoTe2 heterophase junctions with precise phase control and uniform large‐area coverage. The resulting transistors, incorporating 1T' MoTe2 contacts and 2H MoTe2 channels, exhibit ultralow contact resistance, offering a scalable solution to the long‐standing challenge of ...
Ye Lin, Hanwool Lee, Junzhe Kang, Zhiyu Wang, Richard T. Haasch, Stasiu T. Chyczewski, Zetai Liu, Huai‐Chung Chuang, Jun‐Fei Zheng, Wenjuan Zhu   +9 more
wiley   +1 more source

Spectroscopy of horizontal branch stars in NGC6752 - Anomalous results on atmospheric parameters and masses

, 2007
We used the ESO VLT-FORS2 facility to collect low-resolution spectra of 51 targets distributed along the Horizontal Branch. We determined atmospheric parameters by comparison with theoretical models through standard fitting routines, and masses by basic ...
A. Recio-Blanco, Behr, Behr, Behr, Behr, Bergeron, C. Moni Bidin, Castelli, Catelan, Edelmann, Edelmann, Fabbian, Faulkner, Ferraro, Flower, G. Piotto, Glaspey, Glaspey, Gratton, Gratton, Grundahl, Hamuy, Harris, Horne, Hoyle, Michaud, Michaud, Moehler, Moehler, Moehler, Moehler, Moehler, Moehler, Moehler, Momany, Momany, Momany, Moni Bidin, Napiwotzki, Pace, Peacock, Peterson, Peterson, Peterson, Piotto, Przybilla, Ramirez, Recio-Blanco, Reid, Reid, Renzini, S. Moehler, Saffer, Sandage, Sandage, Sekiguchi, Sosin, Sweigart, Tüg, van den Bergh, Vink, Y. Momany   +61 more
core   +3 more sources

Investigating Experimental Short Term Imprint Dynamics in Ferroelectric Hafnium Oxide Through Phase‐Field Modeling

Advanced Functional Materials, EarlyView.
Phase‐field modeling reveals the mechanisms behind short‐term ferroelectric imprint in Hf0.5Zr0.5O2 polycrystalline thin films. Combined with a charge trapping model, the proposed framework accurately reproduces coercive field shifts with pause time and their recovery through field cycling in polarization‐voltage measurements, offering valuable ...
Kévin Alhada‐Lahbabi, Benoit Manchon, Grégoire Magagnin, Chiara Lepri, Sara Gonzalez, Ingrid Cañero Infante, Martine Le Berre, Bertrand Vilquin, Jordan Bouaziz, Brice Gautier, Damien Deleruyelle   +10 more
wiley   +1 more source

Discovery of a rapidly pulsating subdwarf B star candidate in omega Cen

, 2008
We report the discovery of the first variable extreme horizontal branch star in a globular cluster (omega Cen). The oscillation uncovered has a period of 114 s and an amplitude of 32 mmags.
A. Calamida, Bedin, Brown, Calamida, Castellani, Castellani, Castellani, Charpinet, Charpinet, Charpinet, D'Antona, D'Antona, D'Cruz, Del Principe, G. Bono, Greggio, Han, Han, Han, Heber, Kilkenny, Lee, Moni Bidin, Napiwotzki, Oreiro, Pietrinferni, Piotto, Reed, S. K. Randall, Stetson, Stetson, Stetson, Stetson, van Grootel   +33 more
core   +1 more source