A novel method for estimating the far-ultraviolet flux, and a catalogue for disc-hosting stars in nearby star-forming regions

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Volume 695 (March 2025)

A&A, 695 (2025) A74

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Table 2

Median FUV flux for the regions.

Region	FFUV,median [G0]	(σFUV/FFUV)median
UppSco	${20.11}_{- 107}^{+ 21.03}$ ${20.11_{ - 107}^{ + 21.03}}$	0.35
Lupus	${3.48}_{- 0.31}^{+ 21.03}$ ${3.48_{ - 0.31}^{ + 21.03}}$	0.06
ρ Oph	${18.33}_{- 7.12}^{+ 7.63}$ ${18.33_{ - 7.12}^{ + 7.63}}$	0.30
Taurus	${2.92}_{- 0.14}^{+ 0.16}$ ${2.92_{ - 0.14}^{ + 0.16}}$	0.05
Cham I	${4.57}_{- 1}^{+ 4.3}$ ${4.57_{ - 1}^{ + 4.3}}$	0.19
Cham II	${2.76}_{- 0.02}^{+ 0.03}$ ${2.76_{ - 0.02}^{ + 0.03}}$	0.08
CrA	${9.94}_{- 5.69}^{+ 14.83}$ ${9.94_{ - 5.69}^{ + 14.83}}$	0.39
ONC	${33 713.93}_{- 25803.39}^{+ 97361.13}$ $33713.93_{ - 258803.39}^{ + 97361.13}$	0.96
σ Ori	${232.54}_{- 103.7}^{+ 946.43}$ $232.54_{ - 103.7}^{ + 946.43}$	0.48
λ Ori	${536.86}_{- 436.50}^{+ 2602.54}$ $536.86_{ - 436.50}^{ + 2602.54}$	0.57
NGC 2024	126 462.61	–
NGC 1977	${100.11}_{- 32.07}^{+ 195.16}$ $100.11_{ - 32.07}^{ + 195.16}$	0.73
25 Ori	${18.14}_{- 3.86}^{+ 8}$ $18.14_{ - 3.86}^{ + 8}$	0.26
Serp Main	${3.93}_{- 1.42}^{+ 1.02}$ $3.93_{ - 1.42}^{ + 1.02}$	0.22
Serp NE	${2.79}_{- 0.49}^{+ 1.46}$ $2.79_{ - 0.49}^{ + 1.46}$	0.13
Serp South	${44.27}_{- 26.61}^{+ 190.37}$ $44.27_{ - 26.61}^{ + 190.37}$	0.37

Notes. For each region listed in Column 1, we indicate the median FUV flux and uncertainties (16th and 84th percentiles of the distributions of the median individual FUV fluxes) and the median relative uncertainty. The FUV flux was evaluated using Method 3 (Sect. 4.3), except for NGC 2024, for which we indicate the upper-limit flux evaluated using Method 2 (Sect. 4.2), and Cham II, which does not contain any relevant OBA star, and therefore, the FUV flux estimate refers to Method 1 (Sect. 4.1).

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