Results 141 to 150 of about 6,178,117 (397)

Evolutionary stellar population synthesis with MILES – I. The base models and a new line index system [PDF]

, 2010
We present synthetic spectral energy distributions (SEDs) for single-age, single-metallicity stellar populations (SSPs) covering the full optical spectral range at moderately high resolution [full width at half-maximum (FWHM) = 2.3A].
A. Vazdekis, A. Vazdekis, P. Sánchez-Blázquez, P. Sánchez-Blázquez, J. Falcón-Barroso, J. Falcón-Barroso, A. Cenarro, A. Cenarro, M. Beasley, N. Cardiel, J. Gorgas, R. Peletier   +11 more
semanticscholar   +1 more source

Star formation histories and evolution of 35 brightest E+A galaxies from SDSS DR5

, 2010
We pick out the 35 brightest galaxies from Goto's E+A galaxies catalogue which are selected from the Sloan Digital Sky Survey Data Release 5. The spectra of E+As are prominently characterized by the strong Balmer absorption lines but little [Oii] or ...
A. L. Luo, Abazajian, Adelman-McCarthy, Asari, Bertelli, Blake, Bosch, Choi, Cid Fernandes, Couch, Dressler, Dressler, Falkenberg, Girardi, Goto, Goto, Haines, Jimenez, Koleva, Koleva, Koleva, Le Borgne, Mayer, Michielsen, Moultaka, Ph. Prugniel, Pracy, Prugniel, Rogers, Salpeter, Sánchez-Blázquez, Vazdekis, Vazdekis, W. Du, Y. C. Liang, Y. H. Zhao, Yamauchi, Yang, Yang, Yang, Zabludoff   +40 more
core   +1 more source

Metal-poor Stars in the MW Disk: Resonant Cooling of Vertical Oscillations of Halo Stars in Barred Galaxies

The Astrophysical Journal Letters
Using numerical simulations of a barred disk galaxy embedded in nonspinning and spinning dark matter (DM) halos, we present a novel mechanism of “cooling” the vertical oscillations of DM particles, which acquire disk kinematics.
Xingchen Li, Isaac Shlosman, Daniel Pfenniger, Clayton Heller   +3 more
doaj   +1 more source

Stellar evolution and stellar populations

, 2019
I will overview how the theory of stellar evolution and stellar populations evolved to explain the rich features observed in large surveys of the Magellanic Clouds -- going from subtle features in colour-magnitude diagrams to striking sequences in period-magnitude diagrams.
openaire   +3 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

MIUSCAT: extended MILES spectral coverage – I. Stellar population synthesis models [PDF]

, 2012
We extend the spectral range of our stellar population synthesis models based on the MILES and CaT empirical stellar spectral libraries. For this purpose, we combine these two libraries with the Indo-U.S.
A. Vazdekis, A. Vazdekis, E. Ricciardelli, A. Cenarro, J. G. Rivero-Gonz'alez, L. A. D'iaz-Garc'ia, J. Falcón-Barroso, J. Falcón-Barroso   +7 more
semanticscholar   +1 more source

Social context prevents heat hormetic effects against mutagens during fish development

FEBS Letters, EarlyView.
This study shows that sublethal heat stress protects fish embryos against ultraviolet radiation, a concept known as ‘hormesis’. However, chemical stress transmission between fish embryos negates this protective effect. By providing evidence for the mechanistic molecular basis of heat stress hormesis and interindividual stress communication, this study ...
Lauric Feugere, Claudio Silva De Freitas, Adam Bates, Kenneth B. Storey, Pedro Beltran‐Alvarez, Katharina C. Wollenberg Valero   +5 more
wiley   +1 more source

Stellar Ages: A Code to Infer Properties of Stellar Populations

The Astrophysical Journal
We present a novel statistical algorithm, Stellar Ages, which currently infers the age, metallicity, and extinction posterior distributions of stellar populations from their magnitudes.
Joseph J. Guzman, Jeremiah W. Murphy, Andrés F. Barrientos, Benjamin F. Williams, Julianne J. Dalcanton   +4 more
doaj   +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

Potential Importance of Binary Evolution in UV-Optical Spectral Fitting of Early-Type Galaxies

, 2013
Binaries are very common in galaxies, and more than half of Galactic hot subdwarf stars, which are thought as a possible origin of UV-upturn of old stellar populations, are found in binaries.
Chen, Li, Li, Maocai, Li, Zhongmu, Mao, Caiyan, Zhang, Qian   +4 more
core   +1 more source