2012A&A...547A..88B


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.24CET02:00:16

2012A&A...547A..88B - Astronomy and Astrophysics, volume 547A, 88-88 (2012/11-1)

On the massive young stellar object AFGL 4176. High-spatial-resolution multi-wavelength observations and modeling.

BOLEY P.A., LINZ H., VAN BOEKEL R., BOUWMAN J., HENNING T. and SOBOLEV A.M.

Abstract (from CDS):

Deeply embedded and at distances of several kiloparsecs, massive young stellar objects (MYSOs) present numerous challenges for observation and study. In this work, we present spatially-resolved observations of one MYSO, AFGL 4176, together with survey and literature data, ranging from interferometric observations with VLTI/MIDI in the mid-infrared, to single-dish Herschel measurements in the far-infrared, and sub-millimeter data from APEX. We consider this spatially-resolved, multi-wavelength data set in terms of both radiative transfer and geometric models. We find that the observations are well described by one-dimensional models overall, but there are also substantial deviations from spherical symmetry at scales of tens to hundreds of astronomical units, which are revealed by the mid-infrared interferometric measurements. We use a multiple-component, geometric modeling approach to explain the mid-infrared emission on scales of tens to hundreds of astronomical units, and find the MIDI measurements are well described by a model consisting of a one-dimensional Gaussian halo and an inclined (θ=60°) circumstellar disk extending out to several hundred astronomical units along a position angle of 160°. Finally, we compare our results both with previous models of this source, and with those of other MYSOs, and discuss the present situation with mid-infrared interferometric observations of massive stars.

Abstract Copyright:

Journal keyword(s): stars: formation - techniques: interferometric - techniques: high angular resolution - radiative transfer - stars: individual: AFGL 4176

Errata: + corrigendum vol. 557, p. C1 (2013)

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2037 1
2 [FPA77] NGC 3603 IRS 9A IR 11 15 11.34 -61 16 45.2           ~ 18 0
3 NGC 3603 OpC 11 15 18.6 -61 15 26           ~ 968 1
4 V* V918 Cen LP* 11 47 19.1423539012 -57 41 47.400890398   7.055 5.407     K5III 43 0
5 RAFGL 4176 IR 13 43 01.704 -62 08 51.23           ~ 94 0
6 [GGB2012] G308.9176+00.1231 HII 13 43 02.1 -62 08 52           ~ 59 0
7 IRAS 13481-6124 Y*O 13 51 37.85568 -61 39 07.5168           ~ 40 0
8 NAME M 8E IR Y*O 18 04 53.9 -24 26 41           ~ 82 0
9 W 33a Y*O 18 14 39.0 -17 52 03           ~ 593 0
10 RAFGL 2136 SFR 18 22 26.8740 -13 30 17.177           ~ 251 0

    Equat.    Gal    SGal    Ecl

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