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  Multiwavelength modelling of the circumstellar environment of the massive protostar AFGL 2591 VLA 3

Olguin, F. A., Hoare, M. G., Johnston, K. G., Motte, F., Chen, H.-R.-V., Beuther, H., et al. (2020). Multiwavelength modelling of the circumstellar environment of the massive protostar AFGL 2591 VLA 3. Monthly Notices of the Royal Astronomical Society, 498(4), 4721-4744. doi:10.1093/mnras/staa2406.

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Olguin, F. A., Author
Hoare, M. G., Author
Johnston, K. G., Author
Motte, F., Author
Chen, H.-R. V., Author
Beuther, H., Author
Mottram, J. C., Author
Ahmadi, A., Author
Gieser, C., Author
Semenov, D., Author
Peters, T.1, Author           
Palau, A., Author
Klaassen, P. D., Author
Kuiper, R., Author
Sánchez-Monge, Á., Author
Henning, Th., Author
Affiliations:
1Cosmology, MPI for Astrophysics, Max Planck Society, ou_159876              

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 Abstract: We have studied the dust density, temperature, and velocity distributions of the archetypal massive young stellar object (MYSO) AFGL 2591. Given its high luminosity (⁠L=2×105 L⁠) and distance (d = 3.3 kpc), AFGL 2591 has one of the highest L−−√/d ratio, giving better resolved dust emission than any other MYSO. As such, this paper provides a template on how to use resolved multiwavelength data and radiative transfer to obtain a well-constrained 2D axisymmetric analytic rotating infall model. We show for the first time that the resolved dust continuum emission from Herschel 70- μm observations is extended along the outflow direction, whose origin is explained in part from warm dust in the outflow cavity walls. However, the model can only explain the kinematic features from CH3CN observations with unrealistically low stellar masses (<15 M ), indicating that additional physical processes may be playing a role in slowing down the envelope rotation. As part of our three-step continuum and line fitting, we have identified model parameters that can be further constrained by specific observations. High-resolution mm visibilities were fitted to obtain the disc mass (6 M) and radius (2200 au). A combination of SED and near-infrared observations were used to estimate the luminosity and envelope mass together with the outflow cavity inclination and opening angles.

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 Dates: 2020-09-08
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa2406
Other: LOCALID: 3282843
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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 498 (4) Sequence Number: - Start / End Page: 4721 - 4744 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150