Results 81 to 90 of about 597,439 (330)
On the Roles of Stellar Rotation and Binarity in NGC 2423's Main-sequence Turnoff Region
The Astrophysical JournalResearch has shown that many young and intermediate-age clusters (younger than ∼2 Gyr) have extended main sequences and extended main-sequence turnoffs (eMSTOs), which cannot be adequately described by a single isochrone. The reason for the extended main
Yutian Bu +4 more
doaj +1 more source
Tidal tails of open clusters [PDF]
A&A 691, A28 (2024)Context. Open clusters that emerged from the star forming regions as gravitationally bound structures are subjected to star evaporation, ejection, and tidal forces throughout the rest of their lives. Consequently they form tidal tails that can stretch kiloparsecs along the cluster's orbit. Aims.
arxiv +1 more source
On the Presence of Variable Stars in Open Clusters [PDF]
Symposium - International Astronomical Union, 1975 The significance of variable stars as members of open clusters is outlined. The results of a search for such stars are briefly mentioned.
openaire +2 more sources
Searching for Variable Stars in Galactic Open Clusters [PDF]
AIP Conference Proceedings, 2009 A long-term project, aiming at systematic search for variable stars in Galactic Open Clusters, was started at the Geneva Observatory in 2002. We have been observing regularly a sample of twenty-seven Galactic Open Clusters in the U, B, V Geneva filters.
Claudia Greco +7 more
openaire +3 more sources
Taurine promotes glucagon‐like peptide‐1 secretion in enteroendocrine L cells
FEBS Letters, EarlyView.Taurine, a sulfur‐containing amino acid, is likely taken up by enteroendocrine L cells via the taurine transporter. This process increases the levels of cytosolic ATP. The increase in intracellular Ca2+ concentrations and glucagon‐like peptide‐1 secretion through membrane depolarization is caused by the closure of ATP‐sensitive potassium channels ...
Yuri Osuga +6 more
wiley +1 more source
Stars with Abnormal Spectra in Open Clusters [PDF]
Symposium - International Astronomical Union, 1980 From the literature a list of stars with abnormal spectra belonging to open clusters was compiled. This list is included in Lyngå's catalogue of open clusters. With this data it becomes possible to derive a correlation with the age, compiled by W. Buscombe and which appears also in Lyngå's catalogue.
openaire +2 more sources
FEBS Letters, EarlyView.The NlpC_P60 superfamily of peptidases is recognised by its key role in bacterial cell wall homeostasis. Recently, studies have also described the involvement of NlpC_P60‐like enzymes in bacterial competitive mechanisms and pathogenesis across several lineages.
Catharina dos Santos Silva +1 more
wiley +1 more source
Investigating Variable Stars in the Open Cluster NGC 1912 and Its Surrounding Field [PDF]
, 2020 In this work, we studied the variable stars in the open cluster NGC 1912 based on the photometric observations and $Gaia$ DR2 data. More than 3600 CCD frames in B, V, R filters were reduced, and we obtained the light curves that span about 63 hours. By analyzing these light curves, we detected 24 variable stars, including 16 periodic variable stars ...
arxiv +1 more source
Young and intermediate-age massive star clusters
, 2009 An overview of our current understanding of the formation and evolution of star clusters is given, with main emphasis on high-mass clusters. Clusters form deeply embedded within dense clouds of molecular gas. Left-over gas is cleared within a few million
Girardi L. +9 more
core +1 more source
VARIABLE STARS IN THE OPEN CLUSTER NGC 7142 [PDF]
The Astronomical Journal, 2011 We present new discoveries of variable stars near the turnoff of the old open cluster NGC 7142. Contrary to previous studies, we detect eight contact or near contact eclipsing binaries (including three near the cluster turnoff), and most of these have good probability of being cluster members.
Eric L. Sandquist +2 more
openaire +3 more sources