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Has co been detected in globular cluster red giants? 


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Carbon, nitrogen, and oxygen abundances have been determined for evolved giants in the globular clusters NGC 1851 and Terzan 8 . In NGC 1851, no significant difference was found in the mean values of A(C+N+O) between the two populations of stars, indicating that the double populations are coeval . In Terzan 8, a spectroscopic survey of red giants revealed accurate radial velocities for cluster members, but there is no specific mention of carbon detection in the abstract . Therefore, based on the information provided in the abstracts, it is unclear whether carbon has been detected in globular cluster red giants.

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The paper does not mention the detection of carbon monoxide (CO) in globular cluster red giants.
The paper does not mention the detection of carbon monoxide (CO) in globular cluster red giants.
The paper does not mention the detection of carbon monoxide (CO) in globular cluster red giants.

Related Questions

What was the highest TON of CO in catalytize reduction CO2?5 answersThe highest Turnover Number (TON) achieved for CO production in catalytic reduction of CO2 was 27,666, as reported in a study utilizing a giant polyoxometalate {Mo368} based homogeneous catalytic system. Other studies have also demonstrated significant TON values for CO production. A catalyst containing a CuII complex achieved a TON of 9900 for CO generation under visible light irradiation. Additionally, a catalyst system involving an organic photosensitizer, a cobalt molecular catalyst, and an organic electron transfer relay achieved a TON of 1333 for CO2-to-CO conversion under visible light irradiation. These findings highlight the potential of various catalyst systems in efficiently converting CO2 to CO with high TON values.
What effect do water clusters have on the cos formation?4 answersWater clusters play a significant role in enhancing the catalytic activity of gold nanoclusters towards CO oxidation. The coadsorption of water and oxygen molecules leads to the formation of a complex bound to the gold cluster, activating the O-O bond and resulting in a weakened peroxo or superoxo-like state. This activation lowers the activation barrier for the reaction with CO to form CO2. Additionally, the presence of water clusters can dramatically redshift the optical absorption of MoS2 monolayers, enhancing the excitonic binding energy. Furthermore, the impact of water on cobalt clusters is explored, showing that larger cobalt crystallites undergo oxidation to CoO in the presence of water, with subsequent re-reduction upon water removal, indicating a reversible process influenced by water.
Meanwhile, the H2 consumption decreasing with increased in Co loading, could be attributed to the ?5 answersThe decrease in H2 consumption with an increase in CO loading can be attributed to the reverse dry reforming reaction (RDR) process. In RDR, the molar ratio of H2/CO is reduced to 1 for synthetic natural gas (SNG) production, significantly impacting the consumption of H2. The thermodynamic analysis of the RDR reaction shows that high CO loading promotes CO conversion and CH4 selectivity while decreasing carbon yield. Additionally, the presence of CO2 and steam in the feed gas decreases CH4 selectivity and enhances CO2 content, leading to a decrease in H2 consumption. These findings highlight the intricate interplay between CO loading, reaction conditions, and gas composition in influencing H2 consumption during the RDR process.
Which are the sources of CO?5 answersCarbon monoxide (CO) is emitted from fossil fuel and biomass combustion, as well as from the oxidation of methane and non-methane volatile organic compounds (VOCs). It is also produced by incomplete combustion of hydrocarbons and industrial operations such as iron smelting. The largest surface sources of CO are fossil fuel and biomass burning. In underground coal mines, CO can be generated from the spontaneous combustion of residual coal in goaf, crushing of coal, and oxidation of coal at ambient temperature. In the Niger Delta region of Nigeria, sources of CO production include tobacco fumes, generators, firewood, kerosene, burning of fossil fuels, and the crude oil and gas industry. CO is also produced in certain chemical reactions, such as the Belousov-Zhabotinsky reaction involving cerium and ferroin catalysts.
How does star interact with globular cluster?4 answersStar interactions with globular clusters involve gravitational interactions and hydrodynamic processes. Globular clusters passing through the disk can perturb giant molecular clouds (GMCs), triggering the formation of open clusters. These interactions occur through the deposition of angular momentum and mass transfer between stars, leading to rotational mixing and fast rotation in red giants, as well as mass accretion onto main sequence stars. Hydrodynamic stellar interactions, such as close stellar encounters and physical collisions, play a crucial role in the evolution of dense stellar systems like globular clusters. These interactions explain the presence of peculiar sources observed in globular clusters, such as blue stragglers, millisecond pulsars, and X-ray binaries. The interactions between intracluster gas and the Galactic halo medium can also occur, potentially leading to the formation of diffuse X-ray features in globular clusters.
What is the meaning of the word "cos"?4 answersThe word "cos" does not have a specific meaning mentioned in the abstracts provided.

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