Results 41 to 50 of about 3,080,831 (379)
The influence of initial orbital period on helium and carbon-oxygen core masses in massive case a binary systems with low accretion efficiency [PDF]
Serbian Astronomical Journal, 2022 The evolutionary models of 33 massive Case A binary systems in mass range from 30M⊙ to 40M⊙ with initial orbital periods of 3, 4 and 5 days, accretion efficiency of 10% and at the solar metallicity are presented. The models are obtained with the
Petrović Jelena
doaj +1 more source
Nature Communications, 2022 The direct linear dichroism photodetection without external optics is crucial for applications. Here, Jie et al. exploit the anisotropic charge trapping in organic phototransistors to achieve the dichroic ratio of 104 and to demonstrate a polarizer-free ...
Jing Pan +8 more
doaj +1 more source
Gas phase Elemental abundances in Molecular cloudS (GEMS) [PDF]
EPJ Web of Conferences, 2022 Gas phase Elemental abundances in Molecular CloudS (GEMS) is an IRAM 30m Large Program aimed at determining the elemental abundances of carbon (C), oxygen (O), nitrogen (N), and sulphur (S) in a selected set of prototypical star forming filaments ...
Fuente Asunción
doaj +1 more source
The new carbon symbiotic star IPHAS J205836.43+503307.2 [PDF]
, 2011 We are performing a search for symbiotic stars using IPHAS, the INT Halpha survey of the northern Galactic plane, and follow-up observations. Candidate symbiotic stars are selected on the basis of their IPHAS and near-IR colours, and spectroscopy and ...
A. Englaro +36 more
core +1 more source
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 +1 more source
CXOGBS J173620.2–293338: A CANDIDATE SYMBIOTIC X-RAY BINARY ASSOCIATED WITH A BULGE CARBON STAR [PDF]
, 2013 The Galactic Bulge Survey (GBS) is a wide but shallow X-ray survey of regions above and below the Plane in the Galactic Bulge. It was performed using the Chandra X-ray Observatory's ACIS camera.
R. Hynes +12 more
semanticscholar +1 more source
A Sr-Rich Star on the Main Sequence of Omega Centauri [PDF]
, 2006 Abundance ratios relative to iron for carbon, nitrogen, strontium and barium are presented for a metal-rich main sequence star ([Fe/H]=--0.74) in the globular cluster omega Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen,
Asplund M. +7 more
core +3 more sources
Nanoscale Advances, 2020 Nanoparticles possess fascinating properties and applications, and there has been increasing critical consideration of their use. Because carbon is a component with immaterial cytotoxicity and extensive biocompatibility with different components, carbon ...
Vishnu Sankar Sivasankarapillai +6 more
semanticscholar +1 more source
SD 1313-0019 -- Another second-generation star with [Fe/H] = -5.0, observed with the Magellan Telescope [PDF]
, 2015 We present a Magellan/MIKE high-resolution (R ~ 35,000) spectrum of the ancient star SD 1313-0019 which has an iron abundance of [Fe/H] = -5.0, paired with a carbon enhancement of [C/Fe] ~ 3.0.
Chiti, Anirudh +4 more
core +2 more sources
Observational evidence for composite grains in an AGB outflow. MgS in the extreme carbon star LL Pegasi [PDF]
, 2012 The broad 30 μm feature in carbon stars is commonly attributed to MgS dust particles. However, reproducing the 30 μm feature with homogeneous MgS grains would require much more sulfur relative to the solar abundance.
R. Lombaert +7 more
semanticscholar +1 more source