DREAM - III. A helium survey in exoplanets on the edge of the hot Neptune desert with GIANO-B at TNG

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Volume 676 (August 2023)

A&A, 676 (2023) A130

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Table 2

He I measurements.

Target	Roche lobe (R_p)	ɡp (m s⁻²)	Excess of absorption (%)	H_eq (km)	$δ_{R_{P}} / H_{eq}$ ${{{\delta _{{R_{\rm{P}}}}}} \mathord{\left/ {\vphantom {{{\delta _{{R_{\rm{P}}}}}} {{{\rm{H}}_{{\rm{eq}}}}}}} \right. \kern-\nulldelimiterspace} {{{\rm{H}}_{{\rm{eq}}}}}}$	F_{5−504 Å} (10³ erg s⁻¹ cm⁻²)	Ṁ 3σ (10¹⁰ g s⁻¹)
HAT-P-3b	3.6 7	17.5	<1.9	2	92	7.968	7.772
HAT-P-33b	2.167	5.1	<1.	2231	33	6.195	8.205
HAT-P- 9b	3.207	21.5	<0.6	629	61	1.51	5.702
HD893 5b	8.213	7.8	<0.7	855	76	0.2	3.899
K2-105b	11.202	23.6	<2.33	219	378	1.69	6.028
Kepler-25c	8.1 8	5.3	<1.86	1192	82	1.019	65.26
Kepler-68b	8.722	15.2	<0.72	533	112	1.176	8.13
WASP- 7d	9.565	10.9	<3.29	533	230	0.577	7.85

Notes. From left to right: Roche lobe (estimated following Eggleton 1983), planet’s surface gravity, excess of absorption, atmospheric scale heights (computed by assuming µ = 1.3, Sect. 7), $δ_{R_{P}} / H_{eq}$ ${{{\delta _{{{\rm{R}}_{\rm{P}}}}}} \mathord{\left/ {\vphantom {{{\delta _{{{\rm{R}}_{\rm{P}}}}}} {{{\rm{H}}_{{\rm{eq}}}}}}} \right. \kern-\nulldelimiterspace} {{{\rm{H}}_{{\rm{eq}}}}}}$ (i.e. the 3σ upper limits), the stellar XUV flux at the planet position, and the mass-loss rates computed with the p-winds code at 3σ.

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