Searching for Hα-emitting sources in the gaps of five transitional disks - SPHERE/ZIMPOL high-contrast imaging

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Volume 668 (December 2022)

A&A, 668 (2022) A138

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Table 4

5-σ upper limits to the N_Ha contrast, dereddened H_α line fluxes and luminosities, and accretion luminosities at the projected separations of dust gaps (corresponding to the disk semi-major axis), and planet candidate detections.

Target	Projected separation	Planet mass	N_Ha contrast	F_Hα	L_Hα	log L_acc^(†)
	(arcsec)	(au)^(*)	(M_Jup)	(mag)	(10⁻¹⁵ erg s⁻¹ cm⁻²)	(10⁻⁶ L_⊙)	(L_⊙)
RXJ1615	0.14^(1),(g)	22	4.5⁽¹⁾	8.1	<1.3	<0.98	<−4.1
	0.50^(2),(g)	78	0.2⁽²⁾	8.6	<0.8	<0.64	<−4.3
LkCa 15	0.093^(4),(p)	15	6⁽⁵⁾	2.7	<190	<150	<−2.0
	0.27^(6),(g)	43	0.5⁽³⁾	4.4	<38	<0.29	<−2.7
TW Hya	0.10^(7),(g)	6	0.04⁽¹⁾	8.2	<14	<1.6	<−3.9
	0.37^(7),(g)	22	0.15⁽³⁾	10.6	<1.7	<0.19	<−4.8
	0.87^(8),(p)	52	0.05⁽⁸⁾	11.1	<1.0	<0.11	<−5.0
T Cha	0.093^(9),(g)	9	1.2⁽⁹⁾	6.0	<1.6	<0.52	<−4.4
HD 163296	0.10^(10),(g)	10		5.4	<700	<220	<−1.9
	0.44^(11),(g)	45		9.5	<16	<5.2	<−3.4
	0.5^(12),(p)	51	6⁽¹²⁾	9.9	<10	<3.3	<−3.6
	0.67^(13),(p)	68	1⁽¹³⁾	10.6	<5.6	<1.8	<−3.8
	0.77^(14),(p)	78	1⁽¹⁴⁾	10.8	<4.5	<1.4	<−3.9

Notes.^(*) Estimated assuming Gaia EDR3 distances from Table 1;^(†) Estimated using the prescription of Aoyama et al. (2021) (see text).^(g) Disk gaps; ^(p) planet candidates.

References.⁽¹⁾ Asensio-Torres et al. (2021);⁽²⁾ de Boer et al. (2016);⁽³⁾ Dong & Fung (2017), values for a viscosity parameter α 10⁻³;⁽⁴⁾ Sallum et al. (2015);⁽⁵⁾ Kraus & Ireland (2012);⁽⁶⁾ Thalmann et al. (2016);⁽⁷⁾ van Boekel et al. (2017);⁽⁸⁾ Tsukagoshi et al. (2019);⁽⁹⁾ Hendler et al. (2018), position of the gap minimum;⁽¹⁰⁾ Isella et al. (2018);⁽¹¹⁾ Isella et al. (2016);⁽¹²⁾ Guidi et al. (2018);⁽¹³⁾ Pinte et al. (2020);⁽¹⁴⁾ Izquierdo et al. (2022).

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