Results 81 to 90 of about 22,085 (227)

Study of ambient environment around Asymptotic Giant Branch Carbon Star: IRAS 01142+6306

open access: yesBibechana, 2018
We studied dust environment such as flux, temperature, mass and inclination angle of the cavity structure around the C-rich Asymptotic giant branch star in 60 μm and 100 μm wavelengths band using Infrared Astronomical Survey. We observed the data of AGB
L Khanal, D R Upadhyay, A K Jha, B Aryal
doaj   +3 more sources

Dusty Stellar Source Classification by Implementing Machine Learning Methods Based on Spectroscopic Observations in the Magellanic Clouds

open access: yesThe Astrophysical Journal
Dusty stellar point sources are a significant stage in stellar evolution and contribute to the metal enrichment of galaxies. These objects can be classified using photometric and spectroscopic observations using color–magnitude diagrams and infrared ...
Sepideh Ghaziasgar   +9 more
doaj   +1 more source

WOCS 4540: Detailed Analysis of a very Long Orbital Period Blue Straggler

open access: yesThe Astrophysical Journal, 2023
WOCS 4540 is the longest orbital period ( P _orb = 3030 days) blue straggler star (BSS)—white dwarf (WD) pair in the old open cluster NGC 188. It also contains one of the most luminous BSS in the cluster.
Meng Sun, Robert D. Mathieu
doaj   +1 more source

New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue [PDF]

open access: yes, 2014
We have commenced a detailed analysis of the known sample of Galactic post-asymptotic giant branch (PAGB) objects compiled in the Toru´ n catalogue of Szczerba et al., and present, for the first time, homogeneously derived distance determinations for the
Shane B. Vickers   +3 more
semanticscholar   +1 more source

Dissipative Particle Dynamics Modeling in Polymer Science and Engineering

open access: yesWIREs Computational Molecular Science, Volume 15, Issue 2, March/April 2025.
Unveiling the dynamics of polymers: A mesoscale simulation of polymer chains (left) modeled through dissipative particle dynamics (DPD) with a detailed magnified view (right) illustrating the interactions and forces driving their hierarchical behavior. ABSTRACT Polymeric materials are intricate systems with unique properties across different length and
Sousa Javan Nikkhah, Matthias Vandichel
wiley   +1 more source

Dust from asymptotic giant branch stars: relevant factors and modelling uncertainties [PDF]

open access: yes, 2014
The dust formation process in the winds of Asymptotic Giant Branch stars is discussed, based on full evolutionary models of stars with mass in the range 1M⊙ 6M6 8M⊙, and metallicities 0.001 < Z < 0.008. Dust grains are assumed to form in an isotropically
P. Ventura   +8 more
semanticscholar   +1 more source

BARIUM ISOTOPIC COMPOSITION OF MAINSTREAM SILICON CARBIDES FROM MURCHISON: CONSTRAINTS FOR s-PROCESS NUCLEOSYNTHESIS IN ASYMPTOTIC GIANT BRANCH STARS [PDF]

open access: yes, 2014
We present barium, carbon, and silicon isotopic compositions of 38 acid-cleaned presolar SiC grains from Murchison. Comparison with previous data shows that acid washing is highly effective in removing barium contamination.
Nan Liu   +12 more
semanticscholar   +1 more source

White dwarf planets

open access: yesEPJ Web of Conferences, 2013
The recognition that planets may survive the late stages of stellar evolution, and the prospects for finding them around White Dwarfs, are growing. We discuss two aspects governing planetary survival through stellar evolution to the White Dwarf stage ...
Bonsor Amy   +4 more
doaj   +1 more source

On the Origin of Morphological Structures of Planetary Nebulae

open access: yesGalaxies, 2018
We suggest that most of the mass in planetary nebulae (PNe) resides in the equatorial region and the spherical envelope and the optically bright lobes of PNe are in fact low-density cavities cleared out by fast outflows and photoionized by UV photons ...
Sun Kwok
doaj   +1 more source

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