The radius and mass of the close solar twin 18 Scorpii derived from asteroseismology and interferometry

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Bazot, M (Author) Other; Ireland, MJ (Author) Other; Huber, D (Author) Other; Bedding, TR (Author) Other; M Broomhall (Author) Other; Campante, TL (Author) Other; Carfantan, H (Author) Other; Chaplin, WJ (Author) Other; Elsworth, Y (Author) Other; Melendez, J (Author) Other; Petit, P (Author) Other; Theado, S (Author) Other; Van Grootel, V (Author) Other; Arentoft, T (Author) Other; Asplund, M (Author) Other; Castro, M (Author) Other; Christensen Dalsgaard, J (Author) Other; do Nascimento, JD (Author) Other; Dintrans, B (Author) Other; Dumusque, X (Author) Other; Kjeldsen, H (Author) Other; McAlister, HA (Author) Other; Metcalfe, TS (Author) Other; Monteiro, MJPFG (Author) FCUP; Santos, NC (Author) FCUP; Sousa, S (Author) FCUP; Sturmann, J (Author) Other; Sturmann, L (Author) Other; ten Brummelaar, TA (Author) Other; Turner, N (Author) Other; Vauclair, S (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 526

Final page: L4

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 69 Citations

Scopus - 23 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Astronomy

Other information

Authenticus ID: P-002-VGQ

DOI: 10.1051/0004-6361/201015679

Abstract (EN): The growing interest in solar twins is motivated by the possibility of comparing them directly to the Sun. To carry on this kind of analysis, we need to know their physical characteristics with precision. Our first objective is to use asteroseismology and interferometry on the brightest of them: 18 Sco. We observed the star during 12 nights with HARPS for seismology and used the PAVO beam-combiner at CHARA for interferometry. An average large frequency separation 134.4+/-0.3 mu Hz and angular and linear radiuses of 0.6759 +/- 0.0062 mas and 1.010 +/- 0.009 R-circle dot were estimated. We used these values to derive the mass of the star, 1.02 +/- 0.03 M-circle dot.

Language: English

Type (Professor's evaluation): Scientific