Results 81 to 90 of about 39,906 (300)
Mining the GALAH Data. I. Study of Five Super Lithium-rich Metal-poor Giants
The Astrophysical JournalThe presence of a large amount of Li in giants is still a mystery. Most of the super Li-rich (SLR) giants reported in recent studies are in the solar metallicity regime.
Antony Susmitha +2 more
doaj +1 more source
Stark broadening data for spectral lines of rare-earth elements: Nb III
, 2013 The electron-impact widths for 15 doubly charged Nb ion lines have been theoretically determined by using the modified semiempirical method. Using the obtained results, we considered the influence of the electron-impact mechanism on line shapes in ...
Dimitrijević, Milan S. +2 more
core +3 more sources
An investigation of four chemically peculiar stars with photometric periods below 12 h [PDF]
, 2016 We present an investigation of three chemically peculiar (CP) stars and one CP star candidate that exhibit photometric periods below 12 h. New spectroscopic observations have been acquired that confirm the peculiar nature of all objects.
S. Hummerich +5 more
semanticscholar +1 more source
FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
Interferometry of chemically peculiar stars: theoretical predictions vs. modern observing facilities
, 2014 By means of numerical experiments we explore the application of interferometry to the detection and characterization of abundance spots in chemically peculiar (CP) stars using the brightest star eps~Uma as a case study.
Causi, G. Li +4 more
core +3 more sources
Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source
A Sample of Am and Ap Candidates from LAMOST DR10 (v1.0) Based on the Ensemble Regression Model
The Astrophysical Journal Supplement SeriesLarge samples of Am and Ap stars are helpful in studying the interplay between phenomena like atomic diffusion, magnetic fields, and stellar rotation in stellar astrophysics.
Hai-Feng Yang +10 more
doaj +1 more source
Lanthanides and other spectral oddities in a Centauri
, 2010 Context: There is considerable interest in the helium variable a Cen as a bridge between helium-weak and helium-strong CP stars. Aims: We investigate Ce III and other possible lanthanides in the spectrum the of hottest chemically peculiar (CP) star in ...
Adelman +26 more
core +1 more source
A search for photometric variability in magnetic chemically peculiar stars using ASAS-3 data [PDF]
, 2015 The (magnetic) chemically peculiar (CP) stars of the upper main sequence are well-suited laboratories for investigating the influence of magnetic fields on the stellar surface because they produce abundance inhomogeneities (spots), which results in ...
K. Bernhard +3 more
semanticscholar +1 more source
The magnetic field of the chemically peculiar star V352 Peg
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACTWe present a spectropolarimetric analysis of the hot star V352 Peg. We have acquired 18 spectropolarimetric observations of the star with ESPaDOnS at the CFHT between 2018 and 2019 and completed our data set with one archival ESPaDOnS measurement obtained in 2011.
L Fréour +4 more
openaire +5 more sources