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Abstract
Context: The object HD 43587Aa is a G0V star observed during the 145-day LRa03 run of the COnvection, ROtation and planetary Transits space mission (CoRoT), for which complementary High Accuracy Radial velocity Planet Searcher (HARPS) spectra with S/N>300 were also obtained. Its visual magnitude is 5.71, and its effective temperature is close to 5950 K. It has a known companion in a highly eccentric orbit and is also coupled with two more distant companions. Aims: We undertake a preliminary investigation of the internal structure of HD 43587Aa. Methods: We carried out a seismic analysis of the star, using maximum likelihood estimators and Markov Chain Monte Carlo methods. Results: We established the first table of the eigenmode frequencies, widths, and heights for HD 43587Aa. The star appears to have a mass and a radius slightly larger than the Sun, and is slightly older (5.6 Gyr). Two scenarios are suggested for the geometry of the star: either its inclination angle is very low, or the rotation velocity of the star is very low. Conclusions: A more detailed study of the rotation and of the magnetic and chromospheric activity for this star is needed, and will be the subject of a further study. New high resolution spectrometric observations should be performed for at least several months in duration.
Original language | English |
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Article number | A34 |
Number of pages | 10 |
Journal | Astronomy and Astrophysics |
Volume | 564 |
DOIs | |
Publication status | Published - 1 Apr 2014 |
Keywords
- astro-ph.SR
- asteroseismology
- stars: individual: HD 43587Aa
- binaries: general
- stars: solar-type
- methods: data analysis
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Dive into the research topics of 'Seismic analysis of HD43587Aa, a solar-like oscillator in a multiple system'. Together they form a unique fingerprint.Projects
- 1 Finished
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Sounding the Stars---The Birmingham and Queen Mary Seismology Programme
Elsworth, Y., Chaplin, B. & Miglio, A.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/04/12 → 31/03/15
Project: Research Councils