OBSERVATIONAL Delta nu-(rho)over-bar RELATION FOR delta Sct STARS USING ECLIPSING BINARIES AND SPACE PHOTOMETRY

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Garcia Hernandez, AG (Author) Other; Martin Ruiz, S (Author) Other; Mario J P F G Monteiro (Author) FCUP; Suarez, JC (Author) Other; Reese, DR (Author) Other; Pascual Granado, J (Author) Other; Garrido, R (Author) Other

Journal

Title: Astrophysical Journal Letters

Vol. 811

Final page: L29

ISSN: 2041-8205

Publisher: American Astronomical Society

Indexing

ISI Web of Knowledge - 45 Citations

Scopus - 56 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-00G-SH2

DOI: 10.1088/2041-8205/811/2/l29

Abstract (EN): Delta Scuti (delta Sct) stars are intermediate-mass pulsators, whose intrinsic oscillations have been studied for decades. However, modeling their pulsations remains a real theoretical challenge, thereby even hampering the precise determination of global stellar parameters. In this work, we used space photometry observations of eclipsing binaries with a delta Sct component to obtain reliable physical parameters and oscillation frequencies. Using that information, we derived an observational scaling relation between the stellar mean density and a frequency pattern in the oscillation spectrum. This pattern is analogous to the solar-like large separation but in the low order regime. We also show that this relation is independent of the rotation rate. These findings open the possibility of accurately characterizing this type of pulsator and validate the frequency pattern as a new observable for delta Sct stars.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6