| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Univ Fed Sao Paulo, Depto Ciencias Exatas & Terra, BR-09972270 Diadema, SP - Brazil
[2] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | NEW ASTRONOMY; v. 18, p. 55-61, JAN 2013. |
| Web of Science Citations: | 2 |
| Abstract | |
A detailed spectroscopic study of a beta Cephei variable star, delta Ceti, is presented. Physical fundamental parameters are estimated from the best fitting of 26 neutral helium lines and Balmer profiles: effective temperature, superficial gravity and projected rotation velocity. Non-LTE abundances of He, C, N, O, Ne, Mg, Al, Si, P. S. Ar and Fe are achieved using model atmospheres with updated atomic data. Our analysis show an N-enrichment and Fe overabundance, with {[}O/Fe]congruent to -0.73 dex, confirming this object to be a metal-rich star, which is a requirement for the kappa-mechanism to trigger the pulsations observed in beta Cephei stars. (C) 2012 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 10/06816-4 - Radiation attenuation and scattering by nanoestructured materials. |
| Grantee: | Roseli Kunzel |
| Support type: | Scholarships in Brazil - Post-Doctorate |