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http://hdl.handle.net/20.500.12386/31248
Title: | Discovery of a Low-mass Companion Embedded in the Disk of the Young Massive Star MWC 297 with VLT/SPHERE | Authors: | Ubeira-Gabellini, M. Giulia Christiaens, Valentin Lodato, Giuseppe Ancker, Mario van den FEDELE , DAVIDE Manara, Carlo F. Price, Daniel J. |
Issue Date: | 2020 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 890 | Issue: | 1 | First Page: | L8 | 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<SUB>⊙</SUB>, 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. | URI: | http://hdl.handle.net/20.500.12386/31248 | URL: | https://iopscience.iop.org/article/10.3847/2041-8213/ab7019 | ISSN: | 0004-637X | DOI: | 10.3847/2041-8213/ab7019 | Bibcode ADS: | 2020ApJ...890L...8U | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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ubeira_2020_postprint.pdf | postprint | 1.22 MB | Adobe PDF | View/Open |
ubeira_2020_editorial.pdf | [Administrators only] | 1.32 MB | Adobe PDF |
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