Details

Autor(en) / Beteiligte

• Torres, Guillermo
• Sandberg Lacy, Claud H
• Pavlovski, Kresimir
• Feiden, Gregory A
• Sabby, Jeffrey A
• BRUNTT, HANS
• Clausen, Jens Viggo

Titel

THE G+M ECLIPSING BINARY V530 ORIONIS: A STRINGENT TEST OF MAGNETIC STELLAR EVOLUTION MODELS FOR LOW-MASS STARS

Ist Teil von

• The Astrophysical journal, 2014-12, Vol.797 (1), p.1-16

Ort / Verlag

United States

Erscheinungsjahr

2014

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• We report extensive photometric and spectroscopic observations of the 6.1 day period, G+M-type detached double-lined eclipsing binary V530 Ori, an important new benchmark system for testing stellar evolution models for low-mass stars. A detailed chemical analysis probing more than 20 elements in the primary spectrum shows the system to have a slightly subsolar abundance, with [Fe/H] = -0.12 + or - 0.08. A comparison with theory reveals that standard models underpredict the radius and overpredict the temperature of the secondary, as has been found previously for other M dwarfs. The observations are most consistent with magnetic fields playing only a small role in changing the global properties of the primary. The V530 Ori system thus provides an important demonstration that recent advances in modeling appear to be on the right track to explain the long-standing problem of radius inflation and temperature suppression in low-mass stars.