Study of CS, SiO, and SiS abundances in carbon star envelopes: Assessing their role as gas-phase precursors of dust. [PDF]
Astron Astrophys, 2019 Aims We aim to determine the abundances of CS, SiO, and SiS in a large sample of carbon star envelopes covering a wide range of mass loss rates to investigate the potential role that these molecules could play in the formation of dust in the surroundings
Massalkhi S, Agúndez M, Cernicharo J.
europepmc +3 more sources
The Abundance of SiC<sub>2</sub> in Carbon Star Envelopes: Evidence that SiC<sub>2</sub> is a gas-phase precursor of SiC dust. [PDF]
Astron Astrophys, 2018 Context Silicon carbide dust is ubiquitous in circumstellar envelopes around C-rich AGB stars. However, the main gas-phase precursors leading to the formation of SiC dust have not yet been identified.
Massalkhi S +8 more
europepmc +3 more sources
Journal of composite materials, 2022 This article presents the possibility of strength improvement and energy absorption of carbon fibre reinforced polymer composites by matrix modification.
Rochele Pinto +4 more
semanticscholar +2 more sources
THE PTI CARBON STAR ANGULAR SIZE SURVEY: EFFECTIVE TEMPERATURES AND NON-SPHERICITY [PDF]
, 2013 We report new interferometric angular diameter observations of 41 carbon stars observed with the Palomar Testbed Interferometer. Two of these stars are CH carbon stars and represent the first such measurements of this subtype. Of these, 39 have Yamashita
G. V. van Belle +4 more
semanticscholar +3 more sources
The carbon star mystery: 40 years later [PDF]
European Physical Journal A, 2023 In 1981 Icko Iben Jr published a paper entitled “The carbon star mystery: why do the low mass ones become such, and where have all the high mass ones gone?”, where he discussed the discrepancy between the theoretical expectation and its observational ...
O. Straniero, C. Abia, I. Domínguez
semanticscholar +3 more sources
DETECTION OF PHOSPHORUS, SULPHUR, AND ZINC IN THE CARBON-ENHANCED METAL-POOR STAR BD+44 493* [PDF]
, 2016 The carbon-enhanced metal-poor star BD+44 493 ([Fe/H]=-3.9) has been proposed as a candidate second-generation star enriched by metals from a single Pop III star.
Ian U. Roederer +5 more
openalex +3 more sources
High-Resolution Spectroscopy of Cool Carbon-Rich and Metal-Poor Star HD 209621 [PDF]
Open Astronomy, 2012 Element abundances for HD 209621 obtained earlier display significant discrepancies, especially in the case of CNO and neutron-capture elements. Therefore we performed a detailed analysis of chemical composition of this star using a new high-resolution ...
Matrozis E., Začs L., Barzdis A.
doaj +2 more sources
Energy aware resource management in 6G IoT networks using STAR RIS [PDF]
Scientific ReportsThe massive IoT sensors, edge devices, software systems and the communication networks require a lot of computing resources for real-time data acquisition and analytics. This puts huge burden on the carbon footprint and energy consumption.
Ali Alqahtani +3 more
doaj +2 more sources
Carbon star survey in the Local Group. VII. NGC 3109 a galaxy without a stellar halo [PDF]
, 2003 We present a CFH12K wide field survey of the carbon star population in and around NGC 3109. Carbon stars, the brightest members of the intermediate-age population, were found nearly exclusively in and near the disk of NGC 3109, ruling out the existence ...
S. Demers, P. Battinelli
openalex +3 more sources
The size, luminosity, and motion of the extreme carbon star IRC+10216 (CW Leonis) [PDF]
, 2012 Very Large Array observations of the extreme carbon star IRC+10216 at 7 mm wavelength with 40 milli-arcsec resolution resolve the object’s radio emission, which forms an almost round uniform disk of 83 milli-arcsec diameter, corresponding to 11 AU (for ...
K. Menten +3 more
semanticscholar +3 more sources