Results 21 to 30 of about 18,407 (265)
INFRARED COLOR-COLOR DIAGRAMS FOR AGB STARS [PDF]
Journal of Astronomy and Space Sciences, 2007 We present infrared color-color diagrams of AGB stars from the observations at near and mid infrared bands. We compile the observations for hundreds of OH/IR stars and carbon stars using the data from the Midcourse Space Experiment (MSX), the two micron ...
Kyung-Won Suh
doaj +1 more source
A search for galactic carbon stars [PDF]
International Astronomical Union Colloquium, 1988 The carbon star is one of the best probes for the galactic study; (1)it is intrinsically bright (Mbol = − 2 to − 6) especially in the red and infrared wavelength regions,(2)it has spectral features readily detectable on objective prism plates due to their strong carbon molecular bands,(3)it is an evolved star distributed abundantly (∼1 star per square ...
openaire +1 more source
On the formation of carbon stars [PDF]
The Astrophysical Journal, 1990 The effect of the mass loss on the formation of carbon stars is investigated using different mass-loss formulas including one proposed in this paper, and the results of different formulas are compared with the observed properties of C stars. It is shown that the new formula reproduces well the observed luminosity distribution of AGB stars, the initial ...
Bryan, GL, Volk, K, Kwok, S
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Identification of Carbon Stars in LAMOST DR9 Based on Deep Learning
The Astrophysical Journal Supplement SeriesCarbon stars play a crucial role in astronomical research and are significant for understanding stellar evolution, measuring cosmic distances, and studying galaxy kinematics.
YiMing He +5 more
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Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
The Carbon Star DY Persei May Be a Cool R Coronae Borealis Variable
The Astrophysical Journal, 2023 Optical and near-IR photometry suggests that the carbon star DY Persei exhibits fadings similar to those of R Coronae Borealis (RCB) variables. Photometric surveys of the Galaxy and Magellanic Clouds uncovered new DY Per variables with infrared ...
D. A. García-Hernández +5 more
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Dust Formation in the Wind of AGB Stars—The Effects of Mass, Metallicity and Gas-Dust Drift
Universe, 2022 Dust production in the wind of stars evolving through the asymptotic giant branch is investigated by using a stationary wind model, applied to results from stellar evolution modelling.
Silvia Tosi +3 more
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Symposium - International Astronomical Union, 1994 More than 1000 new carbon stars have been identified in a ∼200 deg2 area of the SMC during a survey of UK Schmidt Telescope objective-prism plates. Their spatial distribution is like that of the red horizontal branch stars.
D. H. Morgan, D. Hatzidimitriou
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Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Identification of Carbon Stars from LAMOST DR7
The Astrophysical Journal Supplement SeriesCarbon stars are excellent kinematic tracers of galaxies and play important roles in understanding the evolution of the Galaxy. Therefore, it is worthwhile to search for them in a large number of spectra.
Linlin Li +8 more
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