VLT/ERIS observations of the V960 Mon system: a dust-embedded substellar object formed by gravitational instability?
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916849739890688 |
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| author | Dasgupta, Anuroop Zurlo, Alice Weber, Philipp Maio, Francesco Cieza, Lucas A. Fedele, Davide Garufi, Antonio Miley, James Pathak, Prashant Pérez, Sebastián Roccatagliata, Veronica |
| author_facet | Dasgupta, Anuroop Zurlo, Alice Weber, Philipp Maio, Francesco Cieza, Lucas A. Fedele, Davide Garufi, Antonio Miley, James Pathak, Prashant Pérez, Sebastián Roccatagliata, Veronica |
| contents | V960~Mon is an FU Orionis object that shows strong evidence of a gravitationally unstable spiral arm that is fragmenting into several dust clumps. We report the discovery of a new substellar companion candidate around this young star, identified in high-contrast $L'$-band imaging with VLT/ERIS. The object is detected at a projected separation of $0.898 \pm 0.01$ arcseconds with a contrast of $(8.39 \pm 0.07) \times 10^{-3}$. The candidate lies close to the clumps previously detected in the sub-mm (at 1.3 mm) and is co-located with extended polarized IR signal from scattered stellar irradiation, suggesting it is deeply embedded. The object is undetected in the SPHERE $H$-band total intensity, placing an upper mass limit of $\sim38~M_\mathrm{Jup}$ from the contrast curve. Using evolutionary models at an assumed age of 1~Myr, we estimate a mass of $\sim660~M_\mathrm{Jup}$ from the L' brightness; however, this value likely includes a significant contribution from a disk around the companion. The discrepancy between near- and mid-infrared results again suggests the source is deeply embedded in dust. This candidate may represent an actively accreting, disk-bearing substellar object in a young, gravitationally unstable environment. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_13571 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | VLT/ERIS observations of the V960 Mon system: a dust-embedded substellar object formed by gravitational instability? Dasgupta, Anuroop Zurlo, Alice Weber, Philipp Maio, Francesco Cieza, Lucas A. Fedele, Davide Garufi, Antonio Miley, James Pathak, Prashant Pérez, Sebastián Roccatagliata, Veronica Solar and Stellar Astrophysics Earth and Planetary Astrophysics V960~Mon is an FU Orionis object that shows strong evidence of a gravitationally unstable spiral arm that is fragmenting into several dust clumps. We report the discovery of a new substellar companion candidate around this young star, identified in high-contrast $L'$-band imaging with VLT/ERIS. The object is detected at a projected separation of $0.898 \pm 0.01$ arcseconds with a contrast of $(8.39 \pm 0.07) \times 10^{-3}$. The candidate lies close to the clumps previously detected in the sub-mm (at 1.3 mm) and is co-located with extended polarized IR signal from scattered stellar irradiation, suggesting it is deeply embedded. The object is undetected in the SPHERE $H$-band total intensity, placing an upper mass limit of $\sim38~M_\mathrm{Jup}$ from the contrast curve. Using evolutionary models at an assumed age of 1~Myr, we estimate a mass of $\sim660~M_\mathrm{Jup}$ from the L' brightness; however, this value likely includes a significant contribution from a disk around the companion. The discrepancy between near- and mid-infrared results again suggests the source is deeply embedded in dust. This candidate may represent an actively accreting, disk-bearing substellar object in a young, gravitationally unstable environment. |
| title | VLT/ERIS observations of the V960 Mon system: a dust-embedded substellar object formed by gravitational instability? |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2507.13571 |