ALMA detections of circumstellar disks in the giant H II region M17 - Probing the intermediate- to high-mass pre-main-sequence population

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Table 1

Stellar and extinction properties derived from quantitative spectroscopy and optical (λ ⪅ 1.5µ) SED fitting (Backs et al. 2024).

Source	Sp. type ^(a)	T_eff	logg	M_ZAMS ^(b)	M_spec ^(c)	log L/L_⊙	R_⋆	A_V	log Q^(d)	v_rot	Age_HRD
		K	cm s⁻²	M_⊙	M_⊙		R_⊙			kms⁻¹	Myr
B275	B7 III	$12750_{- 1250}^{+ 750}$ ${12750_{ - 1250}^{ + 750}}$	${3.44}_{- 0.34}^{+ 0.12}$ ${3.44_{ - 0.34}^{ + 0.12}}$	${7.2}_{- 0.5}^{+ 0.5}$ ${7.2_{ - 0.5}^{ + 0.5}}$	${9.0}_{- 4.3}^{+ 1.9}$ ${9.0_{ - 4.3}^{ + 1.9}}$	${3.32}_{- 0.09}^{+ 0.05}$ ${3.32_{ - 0.09}^{ + 0.05}}$	${9.5}_{- 0.4}^{+ 0.7}$ ${9.5_{ - 0.4}^{ + 0.7}}$	${7.41}_{- 0.07}^{+ 0.07}$ ${7.41_{ - 0.07}^{ + 0.07}}$	${42.4}_{- 3.0}^{+ 0.26}$ ${42.4_{ - 3.0}^{ + 0.26}}$	$185_{- 75}^{+ 65}$ ${185_{ - 75}^{ + 65}}$	${0.20}_{- 0.041}^{+ 0.054}$ $0.20_{ - 0.041}^{ + 0.054}$
B331 ^(e)	late-B	13 000	-	10	-	${3.97}_{↓}^{+ 0.37}$ $3.97_ \downarrow ^{ + 0.37}$	${18.7}_{- 7.2}^{+ 9.6}$ $18.7_{ - 7.2}^{ + 9.6}$	${13.3}_{- 0.9}^{+ 0.9}$ $13.3_{ - 0.9}^{ + 0.9}$	-	-	0.02
B243	B9 III	${11 900}_{- 300}^{+ 1400}$ ${11900_{ - 300}^{ + 1400}}$	${3.78}_{- 0.14}^{+ 0.22}$ ${3.78_{ - 0.14}^{ + 0.22}}$	${4.2}_{- 0.2}^{+ 0.4}$ ${4.2_{ - 0.2}^{ + 0.4}}$	${4.7}_{- 1.1}^{+ 1.9}$ ${4.7_{ - 1.1}^{ + 1.9}}$	${2.58}_{- 0.03}^{+ 0.11}$ ${2.58_{ - 0.03}^{ + 0.11}}$	${4.6}_{- 0.4}^{+ 0.2}$ ${4.6_{ - 0.4}^{ + 0.2}}$	${7.92}_{- 0.06}^{+ 0.06}$ ${7.92_{ - 0.06}^{ + 0.06}}$	${41.0}_{- 1.7}^{+ 0.88}$ ${41.0_{ - 1.7}^{ + 0.88}}$	$140_{- 45}^{+ 95}$ ${140_{ - 45}^{ + 95}}$	${0.98}_{- 0.21}^{+ 0.17}$ $0.98_{ - 0.21}^{ + 0.17}$
B268	B9 III	$11300_{- 300}^{+ 090}$ ${11300_{ - 300}^{ + 090}}$	${3.78}_{- 0.12}^{+ 0.22}$ ${3.78_{ - 0.12}^{ + 0.22}}$	${4.5}_{- 0.2}^{+ 0.3}$ ${4.5_{ - 0.21}^{ + 0.3}}$	${7.0}_{- 1.3}^{+ 3.2}$ ${7.0_{ - 1.3}^{ + 3.21}}$	${2.66}_{- 0.04}^{+ 0.08}$ ${2.66_{ - 0.04}^{ + 0.08}}$	${5.6}_{- 0.4}^{+ 0.2}$ ${5.6_{ - 0.4}^{ + 0.2}}$	${7.51}_{- 0.07}^{+ 0.07}$ ${7.51_{ - 0.07}^{ + 0.07}}$	${41.0}_{- 0.3}^{+ 0.33}$ ${41.0_{ - 0.3}^{ + 0.33}}$	$180_{- 35}^{+ 115}$ ${180_{ - 35}^{ + 115}}$	${0.74}_{- 0.12}^{+ 0.13}$ $0.74_{ - 0.12}^{ + 0.13}$

Notes. ^(a)Spectral types adopted from Derkink et al. (2024). ^(b)ZAMS mass of best fit PMS track. ^(c)Spectroscopic mass from modeling. ^(d)Number of hydrogen ionizing photons. ^(e)B331 is too embedded to allow full modeling. Physical parameters were estimated by RT17, using spectroscopic classification and estimating T_eff and L from Kurucz calibration tables. The RT17 values were adjusted to the latest distance estimate of 1.7 kpc (see Sect. 2.1).

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