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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Physical parameters and chemical abundances of delta Ceti

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Author(s):
Levenhagen, R. S. [1] ; Kuenzel, R. [2] ; Leister, N. V. [3]
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