Eccentric and cool: A high-spectral-resolution view of 51 Eri b with VLT/HiRISE

Open Access

Table 1.

Results on 51 Eri b for the our nights of observations.

Night	ΔRV ^(a)	v sin i	R_eff ^(b)
	[km s⁻¹]	[km s⁻¹]
2023-11-21	1.72 $_{- 1.99}^{+ 1.94}$ $Mathematical equation: $ _{-1.99}^{+1.94} $$	10.21 $_{- 3.21}^{+ 3.45}$ $Mathematical equation: $ _{-3.21}^{+3.45} $$	29 363 $_{- 7 416}^{+ 13 625}$ $Mathematical equation: $ _{-7\,416}^{+13\,625} $$
2024-12-01	4.24 $_{- 2.01}^{+ 2.00}$ $Mathematical equation: $ _{-2.01}^{+2.00} $$	6.96 $_{- 3.00}^{+ 4.51}$ $Mathematical equation: $ _{-3.00}^{+4.51} $$	43 074 $_{- 16 987}^{+ 32 631}$ $Mathematical equation: $ _{-16\,987}^{+32\,631} $$
2025-02-03	2.75 $_{- 2.90}^{+ 2.44}$ $Mathematical equation: $ _{-2.90}^{+2.44} $$	12.32 $_{- 4.19}^{+ 4.43}$ $Mathematical equation: $ _{-4.19}^{+4.43} $$	24 334 $_{- 12 541}^{+ 6 436}$ $Mathematical equation: $ _{-12\,541}^{+6\,436} $$
2025-09-11	4.12 $_{- 0.90}^{+ 0.86}$ $Mathematical equation: $ _{-0.90}^{+0.86} $$	2.65 $_{- 1.04}^{+ 1.33}$ $Mathematical equation: $ _{-1.04}^{+1.33} $$	113 129 $_{- 37 804}^{+ 73 077}$ $Mathematical equation: $ _{-37\,804}^{+73\,077} $$

Notes.

^(a)

ΔRV represents the difference between the RV of the companion and the RV of the star.

^(b)

The effective resolution, R_eff, is computed as c/v sin i.

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