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  Constraints on HD 113337 fundamental parameters and planetary system. Combining long-base visible interferometry, disc imaging, and high-contrast imaging

Borgniet, S., Perraut, K., Su, K., Bonnefoy, M., Delorme, P., Lagrange, A.-.-M., et al. (2019). Constraints on HD 113337 fundamental parameters and planetary system. Combining long-base visible interferometry, disc imaging, and high-contrast imaging. Astronomy and Astrophysics, 627.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0005-D409-2 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-D40A-1
Genre: Zeitschriftenartikel

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https://ui.adsabs.harvard.edu/abs/2019A&A...627A..44B (beliebiger Volltext)
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Borgniet, S.1, Autor
Perraut, K.1, Autor
Su, K.1, Autor
Bonnefoy, M.1, Autor
Delorme, P.1, Autor
Lagrange, A. -M.1, Autor
Bailey, V.1, Autor
Buenzli, E.1, Autor
Defrère, D.1, Autor
Henning, T.1, Autor
Hinz, P.1, Autor
Leisenring, J.1, Autor
Meunier, N.1, Autor
Mourard, D.1, Autor
Nardetto, N.1, Autor
Skemer, A.1, Autor
Spalding, E.1, Autor
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

Inhalt

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Schlagwörter: techniques: interferometric techniques: high angular resolution stars: individual: HD 113337 planetary systems stars: fundamental parameters
 Zusammenfassung: Context. HD 113337 is a main-sequence F6V field star more massive than the Sun. This star hosts one confirmed giant planet and possibly a second candidate, detected by radial velocities (RVs). The star also hosts a cold debris disc detected through the presence of an infrared excess, making it an interesting system to explore.
Aims: We aim to bring new constraints on the star's fundamental parameters, debris disc properties, and planetary companion(s) by combining complementary techniques.
Methods: We used the VEGA interferometer on the CHARA array to measure the angular diameter of HD 113337. We derived its linear radius using the parallax from the Gaia Second Data Release. We computed the bolometric flux to derive its effective temperature and luminosity, and we estimated its mass and age using evolutionary tracks. Then, we used Herschel images to partially resolve the outer debris disc and estimate its extension and inclination. Next, we acquired high- contrast images of HD 113337 with the LBTI to probe the 10-80 au separation range. Finally, we combined the deduced contrast maps with previous RVs of the star using the MESS2 software to bring upper mass limits on possible companions at all separations up to 80 au. We took advantage of the constraints on the age and inclination brought by fundamental parameter analysis and disc imaging, respectively, for this analysis.
Results: We derive a limb-darkened angular diameter of 0.386 ± 0.009 mas that converts into a linear radius of 1.50 ± 0.04 Ro for HD 113337. The fundamental parameter analysis leads to an effective temperature of 6774 ± 125 K and to two possible age solutions: one young within 14-21 Myr and one old within 0.8-1.7 Gyr. We partially resolve the known outer debris disc and model its emission. Our best solution corresponds to a radius of 85 ± 20 au, an extension of 30 ± 20 au, and an inclination within 10-30° for the outer disc. The combination of imaging contrast limits, published RV, and age and inclination solutions allows us to derive a first possible estimation of the true masses of the planetary companions: 7-2+4 MJup for HD 113337 b (confirmed companion) and 16-3+10 MJup for HD 113337 c (candidate companion). We also constrain possible additional companions at larger separations. Partly based on observations made with the VEGA/CHARA spectro-interferometer.

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 Datum: 2019
 Publikationsstatus: Erschienen
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Titel: Astronomy and Astrophysics
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 627 Artikelnummer: - Start- / Endseite: - Identifikator: -