Dust and gas environment of the young embedded cluster IRAS 18511+0146

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Volume 599 (March 2017)

A&A, 599 (2017) A38

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Table 3

Details of silicate absorption features and extinction towards cluster members.

Object	λ_p ^a	Δλ ^b	τ_max ^c	A_V ^d	A _V−ISM ^e	A _V−mc ^f
	(μm)	(μm)		(mag)	(mag)	(mag)

S7	9.6	1.6	1.8 ± 0.2	35 ± 8	16.3 ± 3.0	19 ± 9
S10	9.6	1.6	2.2 ± 0.2	43 ± 9	16.0 ± 4.3	27 ± 10
S11	9.7	2.0	3.2 ± 0.5	62 ± 17	17.5 ± 5.0	45 ± 18

Notes.

^(a)

λ_p – Wavelength at which the silicate absorption is maximum.

^(b)

Δλ – Width of silicate profile based on wavelengths at which absorption is half the peak value.

^(c)

τ_max – Maximum optical depth of the silicate profile.

^(d)

A_V – Visual extinction estimates obtained using Eq. (6).

^(e)

A_V−ISM – Visual extinction estimates associated with diffuse ISM based on the 3.4 μm aliphatic hydrocarbon feature by Godard et al. (2012).

^(f)

A_V−mc – Contribution of dense molecular cloud to visual extinction based on values obtained from A_V and A_V−ISM.

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