The compact multi-planet system GJ 9827 revisited with ESPRESSO

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Volume 684 (April 2024)

A&A, 684 (2024) A22

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Table 2

Stellar parameters derived with PARAM1.3 using different input parallaxes and magnitudes.

Input	Output
⁽¹⁾π = 33.7247 ± 0.00169 mas	Age = 5.165 ± 3.920 Gyr
⁽³⁾V_mag = 10.101 ± 0.001 mag	M = 0.610 ± 0.012 M_⊙
	R = 0.558 ± 0.012 R_⊙
	log g = 4.701 ± 0.013 dex

⁽¹⁾π = 33.7247 ± 0.00169 mas	Age = 5.465 ± 4.058 Gyr
⁽⁴⁾V_mag = 10.250 ± 0.138 mag	M = 0.592 ± 0.012 M_⊙
	R = 0.542 ± 0.012 R_⊙
	log g = 4.719 ± 0.013 dex

⁽²⁾π = 33.762 ± 0.019 mas	Age = 5.152 ± 4.095 Gyr
⁽³⁾V_mag = 10.101 ± 0.001 mag	M = 0.609 ± 0.013 M_⊙
	R = 0.558 ± 0.012 R_⊙
	log g = 4.701 ± 0.014 dex

⁽²⁾π = 33.762 ± 0.019 mas	Age = 5.247 ± 4.083 Gyr
⁽⁴⁾V_mag = 10.250 ± 0.138 mag	M = 0.593 ± 0.012 M_⊙
	R = 0.542 ± 0.012 R_⊙
	log g = 4.719 ± 0.013 dex

Notes. Input: T_eff = 4236 ± 70 K and [Fe/H] = −0.29 ± 0.06 dex for all cases.

References. 1 - Gaia Collaboration (2022, DR3), 2 - Kervella et al. (2022, eDR3-ZPcorr), 3 - Zacharias et al. (2012), 4 - Henden et al. (2016).

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