Results 111 to 120 of about 11,182,421 (303)

Constraints to the magnetospheric properties of T Tauri stars - I. The C ii], Fe ii] and Si ii] ultraviolet features [PDF]

, 2014
The C ii] feature at similar to 2325 angstrom is very prominent in the spectra of T Tauri stars (TTSs). This feature is a quintuplet of semiforbidden transitions excited at electron temperatures around 10 000 K that, together with the nearby Si ii] and ...
Gómez De Castro, Ana Inés, López Martínez, Fátima   +1 more
core   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

FEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace, Alyssa Borges, Charles Arnaud, Tove Karlsson, Nina K. Bröker, Stefanie Barbirz, Marta Bally   +6 more
wiley   +1 more source

Gravitoastronomy with neutron stars [PDF]

, 2004
Recent advances in gravitational wave detectors mean that we can start to make astrophysically important statements about the physics of neutron stars based on observed upper limits to their gravitational luminosity.
Woan, G., Graham Woan
core   +1 more source

Microbiome−host proteostasis crosstalk—An emerging perspective on mechanisms and interventions toward healthy longevity

FEBS Letters, EarlyView.
Proteostasis and the gut microbiota play a key role in shaping host physiology. Microbiota‐derived metabolites, vitamins, and RNA modulate host proteostasis. Findings from model systems, including C. elegans, indicate microbes can either stabilize or disrupt host proteostasis.
Abhishek Anil Dubey, Maria Ermolaeva
wiley   +1 more source

Population II PAGB Stars. I. Methodology, Initial Results, and the First Luminosity Function

The Astrophysical Journal
Post-asymptotic giant branch (PAGB) stars share many advantages with the tip of the red giant branch (TRGB) for Population II distance measurements, including minimal internal reddening, easy identification, a solid theoretical foundation, and an ...
S. Jean Feeser, Robin Ciardullo, Michael H. Siegel, C. J. Hapich, Akshat S. Chaturvedi   +4 more
doaj   +1 more source

Calibrating the tip of the red giant branch and measuring Magellanic Cloud distances to ∼2% exclusively with Gaia

Astronomy & Astrophysics
We have calibrated the tip of the red giant branch (TRGB) using our recent catalogue of homogeneous globular cluster (GC) distances. The GC distances were determined via a global joint fit to optical period–Wesenheit relations of their member RR Lyrae ...
Cruz Reyes Mauricio, Anderson Richard I., Lengen Bastian   +2 more
doaj   +1 more source

The Giants Stars HE 0107–5240 and HE 0557–4840 and New Searches for Metal‐Poor Stars

, 2008
We report on a new determination of the iron abundance of HE 0107-5240, based on the detection of two Fe II lines in an UV spectrum of the star, which yields [Fe/H]=-5.7.
Bessell, Michael, Norris, John, Keller, Stefan, Christlieb, Norbert, Eriksson, K., Korn, A. J., Zhao, Y H, Zhang, H, Beers, Timothy C, John E. Norris, Norbert Christlieb, Andreas J. Korn, Michael S. Bessell, Yongheng Zhao, Stefan C. Keller, Kjell Eriksson, Haotong Zhang, Timothy C. Beers   +17 more
core   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

Asteroseismology of the multiperiodic field SX Phe pulsator BL Camelopardalis

Astronomy & Astrophysics
Context. BL Camelopardalis (BL Cam) is the most metal-poor SX Phoenicis star known in the Galactic field, making it an excellent test bed for studies of Population II stellar structure and evolution, as well as for investigating the formation channels of
Szewczuk W., Daszyńska-Daszkiewicz J., Walczak P., Rodríguez E.   +3 more
doaj   +1 more source

On the Minimum Metallicity and Mass of the Population II Stars

, 1997
Within collapsing protogalaxies, thermal instability leads to the formation of a population of cool fragments which are confined by the pressure of a residual hot background medium. The critical mass required for the cold clouds to become gravitationally unstable and to form stars is determined by both their internal temperature and external pressure ...
Hellsten, Uffe, Lin, D. N. C.
openaire   +2 more sources