Results 101 to 110 of about 1,652,070 (380)

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets [PDF]

, 2017
The California-Kepler Survey (CKS) is an observational program developed to improve our knowledge of the properties of stars found to host transiting planets by NASA’s Kepler Mission.
E. Petigura, A. Howard, G. Marcy, J. Johnson, H. Isaacson, P. Cargile, L. Hebb, B. Fulton, L. Weiss, T. Morton, J. Winn, L. Rogers, E. Sinukoff, L. Hirsch, I. Crossfield   +14 more
semanticscholar   +1 more source

Quasi-Normal Modes of Stars and Black Holes [PDF]

Living Reviews in Relativity, 1999
Perturbations of stars and black holes have been one of the main topics of relativistic astrophysics for the last few decades. They are of particular importance today, because of their relevance to gravitational wave astronomy.
K. Kokkotas, B. Schmidt
semanticscholar   +1 more source

Making tau amyloid models in vitro: a crucial and underestimated challenge

FEBS Letters, EarlyView.
This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley   +1 more source

Modeling of the Continuous Absorption of Electromagnetic Radiation in Dense Hydrogen Plasma

Open Astronomy, 2011
We investigate a new modeling way for describing the continuous absorption of electromagnetic radiation in a dense partially ionized hydrogen plasma with electron densities 5·1018-1.5·1019 cm-3 and temperatures 16 000–25 000 K, in the wavelength range ...
Mihajlov A. A., Sakan N. M., Srećković V. A., Vitel Y.   +3 more
doaj   +1 more source

Carbon Stars in the Hamburg/ESO Survey: Abundances [PDF]

, 2006
We have carried out a detailed abundance analysis for a sample of 16 carbon stars found among candidate extremely metal-poor (EMP) stars from the Hamburg/ESO Survey.
Alonso A., Amber Swensson, Andrew McWilliam, Asplund M., Barbuy B., Baumuller D. G., Baumuller D. G., Bonifacio P., Christlieb N., Franz-Josef Zickgraf, Gratton R. G., Grevesse N., Hill V., Ian Thompson, Jorge Melendez, Judith G. Cohen, McClure R. D., Norbert Christlieb, Querci F., Querci F., Solange Ramirez, Stephen Shectman, Takeda Y., Tsangarides S., Van Loon J. T.   +24 more
core   +4 more sources

The cytoskeletal control of B cell receptor and integrin signaling in normal B cells and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
In lymphoid organs, antigen recognition and B cell receptor signaling rely on integrins and the cytoskeleton. Integrins act as mechanoreceptors, couple B cell receptor activation to cytoskeletal remodeling, and support immune synapse formation as well as antigen extraction.
Abhishek Pethe, Tanja Nicole Hartmann
wiley   +1 more source

Mass Transfer in Two Post-AGB Binaries with Dusty Disks

Open Astronomy, 2012
We present a time series of high-resolution spectra for two poorly studied candidate post-AGB stars surrounded by dusty disks, BD+46 442 and IRAS 19135+3937. We find that both stars show radial velocity variations with periods of 130-140 days. IRAS 19135+
Gorlova N., Van Winckel H., Jorissen A.
doaj   +1 more source

Evolution of two stellar populations in globular clusters II. Effects of primordial gas expulsion

, 2010
We investigate the early evolution of two distinct populations of low-mass stars in globular clusters under the influence of primordial gas expulsion driven by supernovae to study if this process can increase the fraction of second generation stars at ...
Baumgardt, Baumgardt, Bedin, Bellini, Bonifacio, Brown, C. Charbonnel, Caloi, Caloi, Carretta, Carretta, Carretta, Carretta, Cottrell, de Mink, Decressin, Decressin, Decressin, Decressin, Denissenkov, Ergma, Fenner, Fraix-Burnet, Fryer, Georgy, Gratton, Gratton, H. Baumgardt, Harris, Heger, Herwig, Herwig, Hirschi, Hurley, Karakas, Kobulnicky, Kraft, Kroupa, Lada, Lind, Maeder, Marks, Milone, P. Kroupa, Paresce, Parmentier, Pasquini, Pasquini, Pflamm-Altenburg, Piotto, Piotto, Portegies Zwart, Prantzos, Prantzos, Renzini, Smith, T. Decressin, Tenorio-Tagle, Townsend, Tutukov, Ventura, Ventura, Ventura, Ventura, Ventura, Ventura, Ventura, Ventura, Villanova, Wallerstein, Wünsch   +70 more
core   +1 more source

Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. III. A Consistent 10 Myr Age for the Upper Scorpius OB Association [PDF]

, 2016
When determining absolute ages of identifiably young stellar populations, results strongly depend on which stars are studied. Cooler (K, M) stars typically yield ages that are systematically younger than warmer (A, F, G) stars by a factor of two.
G. Feiden
semanticscholar   +1 more source

Interaction vesicles as emerging mediators of host‐pathogen molecular crosstalk and their implications for infection dynamics

FEBS Letters, EarlyView.
Interaction extracellular vesicles (iEVs) are hybrid vesicles formed through host‐pathogen communication. They facilitate immune evasion, transfer pathogens' molecules, increase host cell uptake, and enhance virulence. This Perspective article illustrates the multifunctional roles of iEVs and highlights their emerging relevance in infection dynamics ...
Bruna Sabatke, Izadora Volpato Rossi, Marcel I. Ramirez   +2 more
wiley   +1 more source