scholarly journals The spectra of WC9 stars: evolution and dust formation★

2015 ◽  
Vol 449 (2) ◽  
pp. 1834-1844 ◽  
Author(s):  
P. M. Williams ◽  
P. A. Crowther ◽  
K. A. van der Hucht
Keyword(s):  
Dust Formation ◽  
Stars Evolution

scholarly journals Optical/infrared observations of RV Tauri stars

1987 ◽  
Vol 122 ◽  
pp. 537-540
Author(s):  
M. J. Goldsmith ◽  
A. Evans ◽  
J. S. Albinson ◽  
M. F. Bode
Keyword(s):  
Dust Formation ◽  
Infrared Excess ◽  
Infrared Observations ◽  
Dust Shells ◽  
Discernible Difference

Optical/infrared observations of RV Tauri stars obtained at SAAO have allowed the natures of the dust shells around stars with infrared excess to be investigated. The data suggest that dust formation occurs sporadically and that some stars have multiple shells. There is no photometrically discernible difference between carbon- and oxygen-rich stars or their dust shells. There is some evidence that stars with higher metallicity have more dust.

Zooming into the complex dusty envelopes of C-rich AGB stars

2018 ◽  
Vol 14 (S343) ◽  
pp. 456-457
Author(s):  
Foteini Lykou ◽  
Josef Hron ◽  
Daniela Klotz
Keyword(s):  
Temperature Distribution ◽  
Near Infrared ◽  
Angular Resolution ◽  
High Angular Resolution ◽  
Dust Formation ◽  
Agb Stars ◽  
Circumstellar Envelopes ◽  
Recent Advances ◽  
Multi Wavelength

AbstractRecent advances in high-angular resolution instruments (VLT and VLTI, ALMA) have enabled us to delve deep into the circumstellar envelopes of AGB stars from the optical to the sub-mm wavelengths, thus allowing us to study in detail the gas and dust formation zones (e.g., their geometry, chemistry and kinematics). This work focuses on four (4) C-rich AGB stars observed with a high-angular resolution technique in the near-infrared: a multi-wavelength tomographic study of the dusty layers of the circumstellar envelopes of these C-rich stars, i.e. the variations in the morphology and temperature distribution.

scholarly journals Dust formation in the winds of AGBs: the contribution at low metallicities

2013 ◽  
Vol 433 (1) ◽  
pp. 313-323 ◽  
Author(s):  
M. Di Criscienzo ◽  
F. Dell’Agli ◽  
P. Ventura ◽  
R. Schneider ◽  
R. Valiante ◽  
...  
Keyword(s):  
Dust Formation

Dust Formation During Steel Production And Fe–C Melt Evaporation

Metallurgist ◽  
2016 ◽  
Vol 60 (1-2) ◽  
pp. 47-53
Author(s):  
A. G. Svyazhin ◽  
D. A. Romanovich ◽  
P. Krishna Rao
Keyword(s):  
Steel Production ◽  
Dust Formation

scholarly journals On the onset of dust formation in AGB stars

2018 ◽  
Vol 14 (S343) ◽  
pp. 119-128
Author(s):  
David Gobrecht ◽  
Stefan T. Bromley ◽  
John M. C. Plane ◽  
Leen Decin ◽  
Sergio Cristallo
Keyword(s):  
Emission Feature ◽  
Stellar Atmospheres ◽  
Nucleation Theory ◽  
Classical Nucleation Theory ◽  
Quantum Mechanical ◽  
Dust Formation ◽  
Agb Stars ◽  
Promising Candidate ◽  
Bending Modes ◽  
Structure Calculations

AbstractA promising candidate to initiate dust formation in oxygen-rich AGB stars is alumina (Al2O3) showing an emission feature around ∼13μm attributed to Al−O stretching and bending modes (Posch+99,Sloan+03). The counterpart to alumina in carbon-rich AGB atmospheres is the highly refractory silicon carbide (SiC) showing a characteristic feature around 11.3μm (Treffers74). Alumina and SiC grains are thought to represent the first condensates to emerge in AGB stellar atmospheres. We follow a bottom-up approach, starting with the smallest stoichiometric clusters (i.e. Al4O6, Si2C2), successively building up larger-sized clusters. We present new results of quantum-mechanical structure calculations of (Al2O3)n, n = 1−10 and (SiC)n clusters with n = 1−16, including potential energies, rotational constants, and structure-specific vibrational spectra. We demonstrate the energetic viability of homogeneous nucleation scenarios where monomers (Al2O3 and SiC) or dimers (Al4O6 and Si2C2) are successively added. We find significant differences between our quantum theory based results and nanoparticle properties derived from (classical) nucleation theory.

scholarly journals Dust formation by failed supernovae

2014 ◽  
Vol 444 (3) ◽  
pp. 2043-2047 ◽  
Author(s):  
C. S. Kochanek
Keyword(s):  
Dust Formation

Dust Formation in Substellar Atmospheres: A Multi-Scale Problem

2006 ◽  
pp. 503-509
Author(s):  
Christiane Helling ◽  
Peter Woitke ◽  
Rupert Klein ◽  
Erwin Sedlmayr
Keyword(s):  
Dust Formation ◽  
Scale Problem ◽  
Multi Scale

scholarly journals Suppression of Carbon Dust Formation by Nitrogen Injection into Hydrogen Plasmas in Detached Plasma Conditions

2010 ◽  
Vol 5 ◽  
pp. 004-004 ◽  
Author(s):  
Masaaki KYO ◽  
Yuji TAKEGUCHI ◽  
Yoshihiko UESUGI ◽  
Yasunori TANAKA ◽  
Suguru MASUZAKI
Keyword(s):  
Dust Formation ◽  
Nitrogen Injection ◽  
Hydrogen Plasmas
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