Volume 586, February 2016
|Number of page(s)||16|
|Section||Interstellar and circumstellar matter|
|Published online||28 January 2016|
A multi-wavelength interferometric study of the massive young stellar object IRAS 13481-6124⋆
Ural Federal University, Kourovka Astronomical Observatory,
51 Lenin Ave.,
2 Max Planck Institute for Radio Astronomy, Auf dem Hügel 69, 53121 Bonn, Germany
3 University of Exeter, Astrophysics Group, Stocker Road, Exeter, EX4 4QL, UK
4 European Southern Observatory, Casilla 19001, Santiago 19, Chile
5 Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
6 LESIA/Observatoire de Paris, CNRS, UPMC, Université Paris Diderot, 5 place Jules Janssen, 92195 Meudon, France
7 Sydney Institute of Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
8 Department of Astronomy, University of Michigan, 830 Dennison Building, 500 Church St., Ann Arbor, MI 48109, USA
9 Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
Received: 5 October 2015
Accepted: 30 October 2015
We present new mid-infrared interferometric observations of the massive young stellar object IRAS 13481-6124, using VLTI/MIDI for spectrally-resolved, long-baseline measurements (projected baselines up to ~120 m) and GSO/T-ReCS for aperture-masking interferometry in five narrow-band filters (projected baselines of ~1.8−6.4 m) in the wavelength range of 7.5−13μm. We combine these measurements with previously-published interferometric observations in the K and N bands in order to assemble the largest collection of infrared interferometric observations for a massive YSO to date. Using a combination of geometric and radiative-transfer models, we confirm the detection at mid-infrared wavelengths of the disk previously inferred from near-infrared observations. We show that the outflow cavity is also detected at both near- and mid-infrared wavelengths, and in fact dominates the mid-infrared emission in terms of total flux. For the disk, we derive the inner radius (~1.8 mas or ~6.5 AU at 3.6 kpc), temperature at the inner rim (~1760 K), inclination (~48°) and position angle (~107°). We determine that the mass of the disk cannot be constrained without high-resolution observations in the (sub-)millimeter regime or observations of the disk kinematics, and could be anywhere from ~10-3 to 20M⊙. Finally, we discuss the prospects of interpreting the spectral energy distributions of deeply-embedded massive YSOs, and warn against attempting to infer disk properties from the spectral energy distribution.
Key words: stars: massive / techniques: interferometric / stars: individual: IRAS 13481-6124
© ESO, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.