Results 51 to 60 of about 165,855 (235)

Do Red Galaxies Form More Stars than Blue Galaxies?

The Astrophysical Journal
A new model is proposed in which typical galaxies form most of their stellar mass in a phase with an intrinsically red stellar population. In the standard picture, galaxies with intrinsically red stellar populations are believed to have old stellar ...
Charles L. Steinhardt
doaj   +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

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

Spatially Resolved Spectroscopic Star Formation Histories of Nearby Disks: Hints of Stellar Migration [PDF]

, 2012
We use the Mitchell Spectrograph (formerly VIRUS-P) to observe 12 nearby disk galaxies. We successfully measure ages in the outer disk in six systems. In three cases (NGC 2684, NGC 6155, and NGC 7437), we find that a downward break in the disk surface ...
Debattista, Victor P., Roskar, Rok, Yoachim, Peter   +2 more
core   +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

Spatially Resolved Analysis of Stellar Populations in NGC 2992: Impact of Active Galactic Nucleus Feedback

The Astrophysical Journal
In NGC 2992, a galaxy-scale ionized gas outflow driven by active galactic nuclei (AGNs) has long been recognized, yet its impact on the host galaxy has remained elusive.
Xiaoyu Xu, Junfeng Wang, Zhiyuan Li, Yanmei Chen   +3 more
doaj   +1 more source

Eight luminous early-type galaxies in nearby pairs and sparse groups I. Stellar populations spatially analysed

, 2018
We present a detailed spatial analysis of stellar populations based on long-slit optical spectra in a sample of eight luminous early-type galaxies selected from nearby sparse groups and pairs, three of them may be interacting with a galaxy of similar ...
Krabbe, A. C., Milone, A. C., Rodrigues, I., Rosa, D. A.   +3 more
core   +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

Missing Giants: Predictions on Dust-obscured Galaxy Stellar Mass Assembly Throughout Cosmic Time

The Astrophysical Journal, 2023
Due to their extremely dust-obscured nature, much uncertainty still exists surrounding the stellar mass growth and content in dusty, star-forming galaxies (DSFGs) at z > 1. In this work, we present a numerical model built using empirical data on DSFGs to
Arianna S. Long, Caitlin M. Casey, Claudia del P. Lagos, Erini L. Lambrides, Jorge A. Zavala, Jaclyn Champagne, Olivia R. Cooper, Asantha R. Cooray   +7 more
doaj   +1 more source

Constraining the metallicities, ages, star formation histories, and ionizing continua of extragalactic massive star populations

, 2019
We infer the properties of massive star populations using the far-ultraviolet stellar continua of 61 star-forming galaxies: 42 at low-z observed with HST and 19 at z~2 from the Megasaura sample.
Bayliss, M., Berg, D. A., Chisholm, J., Dahle, H., Gladders, M., Rigby, J. R., Sharon, K.   +6 more
core   +1 more source