SIMBAD references

2020ApJ...890L...8U - Astrophys. J., 890, L8-L8 (2020/February-2)

Discovery of a low-mass companion embedded in the disk of the young massive star MWC 297 with VLT/SPHERE.

UBEIRA-GABELLINI M.G., CHRISTIAENS V., LODATO G., VAN DEN ANCKER M., FEDELE D., MANARA C.F. and PRICE D.J.

Abstract (from CDS):

We report the discovery of a low-mass stellar companion around the young Herbig Be star MWC 297. We performed multi-epoch high-contrast imaging in the near-infrared with the Very Large Telescope (VLT)/Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. The companion is found at a projected separation of 244.7 ± 13.2 au and a position angle of 176.4 ± 0.1 deg. The large separation supports formation via gravitational instability. From the spectrum, we estimate a mass of 0.1-0.5 M, the range conveying uncertainties in the extinction of the companion and in evolutionary models at young ages. The orbit coincides with a gap in the dust disk inferred from the spectral energy distribution. The young age (<=1 Myr) and mass ratio with the central star (∼0.01) makes the companion comparable to PDS 70 b, suggesting a relation between formation scenarios and disk dynamics.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Ae stars - Star formation - Binary stars

Status at CDS:  

Simbad objects: 17

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2020.05.27-07:40:17

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