HR 10 as seen by CHEOPS and TESS - Revealing δ Scuti pulsations, granulation-like signal and hint for transients

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Volume 690 (October 2024)

A&A, 690 (2024) A73

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Table 2.

Orbital and stellar parameters of the system.

Object	Orbital or stellar parameter	Method – reference
HR 10	$P_{orbit} = 747 . 36_{- 0.64}^{+ 0.67}$ $P_{\mathrm{orbit}} = 747.36^{+0.67}_{-0.64}$ d	Astrometry (from interferometric data) – M19
	$j [°] = 93 . 34_{- 0.63}^{+ 0.63}$ $j [\circ] = 93.34^{+0.63}_{-0.63}$

HR 10 A	M = 1.94 ± 0.15 M_⊙	Orbital solution (RV + astrometry) – M19
	T_eff = 9000 ± 100 K	Spectroscopy + photometry – M19
	L = 57.30 ± 2 L_⊙	Gaia DR2 – M19
	L = 28.79 ± 0.87 L_⊙	Gaia DR3 – This work
	log g = 3.8 ± 0.1	Spectroscopy + photometry – M19
	log g = 4.1 ± 0.1	including DR3 revision
	v sin i^⋆ = 294 ± 9 km/s	Spectroscopy – Mora et al. (2001)
	R = 3.18 ± 0.06 R_⊙	Gaia DR2 – This work
	R = 2.23 ± 0.04 R_⊙	Gaia DR3 – This work

HR 10 B	M = 1.62 ± 0.13 M_⊙	Orbital solution (RV + astrometry) – M19
	T_eff = 8250 ± 100 K	Spectroscopy + photometry – M19
	L = 13.70 ± 0.50 L_⊙	Gaia DR2 – M19
	L = 6.88 ± 0.21 L_⊙	Gaia DR3 – This work
	log g = 4.2 ± 0.1	Spectroscopy + photometry – M19
	log g = 4.4 ± 0.1	including DR3 revision
	v sin i^⋆ = 200 ± 20 km/s	Spectroscopy – M19
	R = 1.82 ± 0.04 R_⊙	Gaia DR2 – This work
	R = 1.28 ± 0.03 R_⊙	Gaia DR3 – This work

Notes. P_orbit is the orbital period of the binary; j the inclination of the orbital plane of the system ; M the stellar mass; T_eff is the effective temperature; log g the surface gravity; L the luminosity; v sin i^⋆ the projected stellar rotation velocity. The exact details of the methods used for the derivation of these parameters can be found in the mentioned references.

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