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Table 3

Results for equivalent widths, mass-accretion rates, and characteristic sizes of the Brγ emission region.

AS353 RU Lup 2018 RU Lup 2021 TW Hya DG Tau DoAr 44 S CrA VV CrA
FL/C 1.91 1.86 1.83 1.61 1.29 1.19 1.53 1.65
FWHM [km s−1] 233 183 187 121 224 137 175 150
W10% [km s−1] 594 607 420 241 445 274 524 416
µHV [km s−1] −97 −55 −50 −183 – – −273 −75.49
µLV [km s−1] 3 2 6 1 – – 3 0.84
FWHMHV [km s−1] 520 586 295 482 – – 549 598.54
FWHMLV [km s−1] 204 154 154 116 – – 170 141.32
EW [Å] −19.62 ± 0.91 −16.82 ± 1.76 −13.47 ± 0.43 −7.11 ± 0.76 −5.80 ± 0.35 −2.65 ± 0.38 −8.71 ± 0.66 −10.09 ± 0.99
Lacc [L⊙] 3.07 ± 0.17 0.98 ± 0.12 0.76 ± 0.03 0.03 ± 0.00 0.33 ± 0.02 0.07 ± 0.01 1.74 ± 0.15 1.64 ± 0.19
log [M⊙ yr−1] −6.38 ± 0.44 −6.76 ± 0.48 −6.87 ± 0.48 −8.74 ± 0.49 −7.40 ± 0.47 −8.46 ± 0.49 −6.56 ± 0.44 −6.52 ± 0.47
[10−8 M⊙ yr−1]
PA [°] 173 ± 3 99 ± 31 101 ± 31 130 ± 32 143 ± 12 137 ± 4 1±6 91 ± 6
i [°] 41 ± 2 49 ± 4 32 ± 4 27 ± 3 32 ± 3
Continuum HWHM [au] 0.28 ± 0.05 0.21 ± 0.06 0.21 ± 0.06 0.042 ± 0.003 0.13 ± 0.01 0.16 ± 0.02 0.17 ± 0.02 0.16 ± 0.01
Brγ HWHM [au] 0.206 ± 0.003 0.076 ± 0.001 0.061 ± 0.001 0.029 ± 0.001 0.143 ± 0.004 0.050 ± 0.002 0.071 ± 0.011 0.081 ± 0.005
Rtr [au] 0.04 – 0.08 0.04 – 0.07 0.04 – 0.08 0.05 – 0.07 0.05 – 0.09 0.09 – 0.11 0.05 – 0.10 0.04 – 0.07
Rco [au] 0.10 0.04 0.04 0.05 0.06 0.05 0.04 0.10
Continuum HWHM [R*] 18.13 ± 3.59 17.36 ± 5.10 17.36 ± 5.10 7.47 ± 0.70 11.32 ± 1.61 19.07 ± 2.69 10.38 ± 1.42 12.64 ± 1.04
Brγ HWHM [R*] 13.32 ± 1.16 6.32 ± 0.43 5.01 ± 0.35 5.13 ± 0.33 12.93 ± 1.56 5.93 ± 0.47 4.36 ± 0.75 6.56 ± 0.59
Rtr [R*] 2.83 – 5.30 3.28 – 6.14 3.53 – 6.61 8.31 – 12.35 4.50 – 8.42 10.62 – 12.68 3.36 – 6.29 2.86 – 5.36
Rco [R*] 6.47 3.31 3.31 8.89 5.44 5.96 2.44 7.25

Notes. FL/C is the total line to continuum flux ratio at the centre of the line. FWHM and W10% are the line widths at 50 and 10% of the peak flux, respectively. µ is the position of the high (HV) or low velocity (LV) component from the double Gaussian fit to the spectrum. The Brγ half-flux radius (HWHM) is given for the central channel. Rco, continuum HWHM, PA, and i were adopted from GRAVITY Collaboration (2021b). Accretion luminosities were estimated from the line luminosities based on the empirical relationship in Eq. (1). The instantaneous mass-accretion rates were then computed as in Eq (2). Rtr is given based on Eq. (4) for magnetic field strengths between 1 and 3 kG and using the mass-accretion rates derived from the equivalent widths (EW). The asymmetric error bars on the absolute values of represent the 25th and 75th percentiles of the distribution. Other error bars denote 1γ uncertainties.

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