Results 111 to 120 of about 180,740 (304)

Rapidly rotating red giants

EPJ Web of Conferences, 2017
Stellar oscillations give seismic information on the internal properties of stars. Red giants are targets of interest since they present mixed modes, wich behave as pressure modes in the convective envelope and as gravity modes in the radiative core ...
Gehan Charlotte, Mosser Benoît, Michel Eric   +2 more
doaj   +1 more source

The Super Lithium-Rich Red Giant Rapid Rotator G0928+73.2600: A Case for Planet Accretion?

, 2010
We present the discovery of a super lithium-rich K giant star, G0928+73.2600. This red giant (T_eff = 4885 K and log g = 2.65) is a fast rotator with a projected rotational velocity of 8.4 km/s and an unusually high lithium abundance of A(Li) = 3.30 dex.
Alexander, Carlberg, Carney, Castilho, Charbonnel, de La Reza, de Medeiros, Denissenkov, Drake, Eggleton, Ghezzi, Gratton, Kumar, Lodders, Luck, Mandell, Palmerini, Patterson, Piskunov, Reddy, Reddy, Sackmann, Smith, Sneden   +23 more
core   +1 more source

Roles of nanomagnetic beads on biosensing: From fabrication to application

Interdisciplinary Medicine, EarlyView.
Leveraging their intrinsic superparamagnetic properties and rapid magnetic responsiveness, functionalized nanomagnetic beads have emerged as pivotal platforms in advanced biosensing system. Through surface engineering and structural design, these magnetic nanoparticles demonstrate multi‐capabilities, such as sample separation, signal enhancement, and ...
Junjie Li, Liyang Duan, Qian Chen, Songsong Huang, Weixia Li, Huachu Zuo, Shuang Li, Wei Han, Wei Fu, Shike Hou, Bin Fan, Zetao Chen   +11 more
wiley   +1 more source

Testing the Breakdown of the Asteroseismic Scaling Relations in Luminous Red Giants

The Astrophysical Journal
Nearly all cool, evolved stars are solar-like oscillators, and fundamental stellar properties can be inferred from these oscillations with asteroseismology.
Amanda L. Ash, Marc H. Pinsonneault, Mathieu Vrard, Joel C. Zinn   +3 more
doaj   +1 more source

The development of the red giant branch. II - Astrophysical properties

The Astrophysical Journal, 1990
Evolutionary sequences developed in another paper are used here to investigate the properties of the red giant branch (RGB) phase transition. Results are found for compositions in the range Y(MS) between 0.20 and 0.30 and Z between 0.004 and 0.04. The transition mass M(HeF) increases as either Y(MS) decreases or Z increases.
Allen V. Sweigart, Laura Greggio, Alvio Renzini   +2 more
openaire   +2 more sources

Fast Tissue Clearing and Volume Imaging Techniques for Anatomy

Microscopy Research and Technique, EarlyView.
Tissue clearing and volume imaging techniques have revolutionized our ability to visualize large biological samples, but they face obstacles related to speed, tissue preservation, complexity, and the need for fluorescence labels that make them difficult to implement in anatomy and preclinical research.
Clément Ricard, Doriane Hazart, Brigitte Delhomme, Marwa Moulzir, Irina Rakotoson, Martin Oheim   +5 more
wiley   +1 more source

Can Life develop in the expanded habitable zones around Red Giant Stars?

, 2005
We present some new ideas about the possibility of life developing around sub-giant and red giant stars. Our study concerns the temporal evolution of the habitable zone.
Brack A., Brasier M. D., Bruno Lopez, Clampin M., Dalton J. B., Jean Schneider, Kasting J. F., Kozlowski M., Maeder A., Mallik S. V., Neckel H., Paczynski B., Roten C.-A. H., Sleep N. H., Weidemann J., William C. Danchi, Zubrin R.   +16 more
core   +3 more sources

Discrete Chiral Ballistic Polariton Laser

Laser &Photonics Reviews, EarlyView.
Planar microcavities in the strong light–matter coupling regime exhibit exciton‐polariton modes with a strong chiral response toward circularly polarized light. This feature is exploited alongside inherent spin‐orbit coupling of cavity light to generate giant discrete optical vortices in polygonal arrays of exciton‐polariton condensates.
Zuzanna Werner, Andrzej Frączak, Valtýr Kári Daníelsson, Jacek Szczytko, Barbara Piętka, Helgi Sigurðsson   +5 more
wiley   +1 more source

Discovery of a Metal-poor Red Giant Star with the Highest Ultralithium Enhancement

The Astrophysical Journal
We present the discovery of 2MASS J05241392−0336543 (hereafter J0524−0336), a very metal-poor ([Fe/H] = −2.43 ± 0.16), highly r -process-enhanced ([Eu/Fe] = +1.34 ± 0.10) Milky Way halo field red giant star, with an ultrahigh Li abundance of A (Li, 3D ...
Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Ella Xi Wang, Yangyang Li, Zoe Hackshaw, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika Holmbeck, Vinicius M. Placco, Charli M. Sakari   +12 more
doaj   +1 more source

Mass spectrometry of dendrimers

Mass Spectrometry Reviews, EarlyView.
Abstract Mass spectrometry (MS) has become an essential technique to characterize dendrimers as it proved efficient at tackling analytical challenges raised by their peculiar onion‐like structure. Owing to their chemical diversity, this review covers benefits of MS methods as a function of dendrimer classes, discussing advantages and limitations of ...
McKenna J. Redding, Scott M. Grayson, Laurence Charles   +2 more
wiley   +1 more source