Results 81 to 90 of about 550,992 (335)

Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler

, 2012
We report for the first time a parametric fit to the pattern of the \ell = 1 mixed modes in red giants, which is a powerful tool to identify gravity-dominated mixed modes.
Aizenman, B. Mosser, Baudin, Baudin, Beck, Beck, Bedding, Bedding, Borucki, Brassard, Brown, C. Barban, C. J. Burke, Campante, Carrier, Chaplin, Chaplin, Christensen-Dalsgaard, D. Stello, De Ridder, Deheuvels, Deheuvels, di Mauro, Dupret, Dziembowski, Dziembowski, E. Michel, García, Gilliland, Hekker, Hekker, Huber, J. De Ridder, J. P. Marques, Jenkins, Jiang, K. Belkacem, Kallinger, Koch, Ledoux, M. C. Stumpe, M. J. Goupil, Mathur, Mathur, Miglio, Morel, Mosser, Mosser, Mosser, Mosser, Mosser, Mosser, P. G. Beck, Pablo, R. A. García, R. Samadi, S. Hekker, Shibahashi, T. Barclay, T. Kallinger, T. R. Bedding, Tassoul, Verner, White, White, Y. Elsworth   +65 more
core   +2 more sources

Observation of the Halo of NGC 3077 Near the "Garland" Region Using the Hubble Space Telescope [PDF]

, 2001
We report the detection of upper main sequence stars and red giant branch stars in the halo of an amorphous galaxy, NGC3077. The observations were made using Wide Field Planetary Camera~2 on board the Hubble Space Telescope.
Barbieri C., Barry F. Madore, Bertelli G., Brouillet N., Caldwell N., Cottrell G. A., Dean J. F., Demoulin M., Heckman T. M., Karachentsev V. E., Karachentseva V. E., Salaris M., Shoko Sakai, van der Hulst J. M.   +13 more
core   +3 more sources

Bright Monocompound Metal Halide Scintillator for Fast Neutron Radiography

Advanced Functional Materials, EarlyView.
Metal halide scintillator, tetraphenylphosphonium manganese bromide (TPP2MnBr4), provides a significant benefit for fast neutron imaging. A fourfold increase in efficiency over traditional zinc sulfide screens is achieved by efficiently utilizing neutron interactions within its homogeneous structure.
Aditya Bhardwaj, Kostiantyn Sakhatskyi, Anastasiia Sakhatska, Pavel Trtik, Ye Wu, Yevhenii Padniuk, Yuliia Kominko, Kai Han, Vladyslav Orlov, Markus Strobl, Andrey L. Rogach, Zhiguo Xia, Sergii Yakunin, Maksym V. Kovalenko   +13 more
wiley   +1 more source

Orbital eccentricity of the symbiotic star MWC 560

, 2009
We present projected rotational velocity measurements of the red giant in the symbiotic star MWC 560 (V694 Mon), using the high-resolution spectroscopic observations with the FEROS spectrograph.
Gomboc, A., Stateva, I. K., Stoyanov, K. A., Zamanov, R. K.   +3 more
core   +1 more source

Domain Nucleation and Growth in an Epitaxially Grown Wurtzite Ferroelectric

Advanced Functional Materials, EarlyView.
Ferroelectric domain nucleation and growth in epitaxial wurtzite (Al, B, Sc)N films are visualized through in situ transmission electron microscopy. Domains initiate near the bottom electrode and propagate laterally with zigzag walls, while unswitched regions remain near the electrode interfaces.
Sebastian Calderon, Chloe Skidmore, Jon‐Paul Maria, Elizabeth C. Dickey   +3 more
wiley   +1 more source

Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars VI. First chromosphere model of a late-type giant

, 2017
Although observational data unequivocally point out to the presence of chromospheres in red giant stars, no attempts have been made so far to model them using 3D hydrodynamical model atmospheres.
Klevas, Jonas, Kucinskas, Arunas, Ludwig, Hans-Gunter, Wedemeyer, Sven   +3 more
core   +1 more source

An empirical mass-loss law for Population II giants from the Spitzer-IRAC survey of Galactic globular clusters [PDF]

, 2014
The main aim of the present work is to derive an empirical mass-loss (ML) law for Population II stars in first and second ascent red giant branches.
Dalessandro, E., Fabbri, S., Ferraro, F. R., Origlia, L., Pecci, F. Fusi, Rich, R. M., Valenti, E.   +6 more
core   +1 more source

Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge

Advanced Functional Materials, EarlyView.
Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu, Shuvankar Gupta, Hengxin Tan, Hyeonhu Bae, Olajumoke Oluwatobiloba Emmanuel, Mingyu Xu, Yan Wu, Xiaofeng Xu, Pengpeng Zhang, Weiwei Xie, Binghai Yan, Xianglin Ke   +11 more
wiley   +1 more source

Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204

The Astronomical Journal
We have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29
Barbara J. Anthony-Twarog, Constantine P. Deliyannis, Aaron Steinhauer, Qinghui Sun, Bruce A. Twarog   +4 more
doaj   +1 more source

Simulations of the symbiotic recurrent nova V407 Cyg. I. Accretion and shock evolutions

, 2015
The shock interaction and evolution of nova ejecta with a wind from a red giant star in a symbiotic binary system are investigated via three-dimensional hydrodynamics simulations.
Pan, Kuo-Chuan, Ricker, Paul M., Taam, Ronald E.   +2 more
core   +1 more source