Discovery of a Low-mass Companion Embedded in the Disk of the Young Massive Star MWC 297 with VLT/SPHERE

M. Giulia Ubeira-Gabellini; Valentin Christiaens; Giuseppe Lodato; Mario Van Den Ancker; Davide Fedele; Carlo F. Manara; Daniel J. Price

doi:10.3847/2041-8213/ab7019

Discovery of a Low-mass Companion Embedded in the Disk of the Young Massive Star MWC 297 with VLT/SPHERE

M. Giulia Ubeira-Gabellini, Valentin Christiaens, Giuseppe Lodato, Mario Van Den Ancker, Davide Fedele, Carlo F. Manara, Daniel J. Price

School of Physics and Astronomy

Research output: Contribution to journal › Article › Research › peer-review

7 Citations (Scopus)

Abstract

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 _o&dot;, 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.

Original language	English
Article number	L8
Number of pages	6
Journal	The Astrophysical Journal Letters
Volume	890
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab7019
Publication status	Published - 10 Feb 2020

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10.3847/2041-8213/ab7019

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title = "Discovery of a Low-mass Companion Embedded in the Disk of the Young Massive Star MWC 297 with VLT/SPHERE",

abstract = "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 o&dot;, 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.",

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AU - Giulia Ubeira-Gabellini, M.

AU - Christiaens, Valentin

AU - Lodato, Giuseppe

AU - Ancker, Mario Van Den

AU - Fedele, Davide

AU - Manara, Carlo F.

AU - Price, Daniel J.

PY - 2020/2/10

Y1 - 2020/2/10

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AB - 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 o&dot;, 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.

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JF - The Astrophysical Journal Letters

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Discovery of a Low-mass Companion Embedded in the Disk of the Young Massive Star MWC 297 with VLT/SPHERE

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Gaps, rings and holes in protoplanetary discs - signs of newborn planets?

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Discovery of a Low-mass Companion Embedded in the Disk of the Young Massive Star MWC 297 with VLT/SPHERE

Abstract

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Gaps, rings and holes in protoplanetary discs - signs of newborn planets?

Cite this