DENIS-P J1901391-370017: IS A YOUNG VERY LOW-MASS STAR OR A LOW-MASS BROWN DWARF IN CORONA-AUSTRALIS?

Bảo Ngọc Phan

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Abstract

DENIS-P J1901391-370017 has been identified as a low-mass brown dwarf in the Corona-Australis cloud. This paper presents our mass estimate of this brown dwarf. The dereddened spectral energy distribution of the source indicates that DENIS-P J1901391-370017 is a very low-mass star, not a low-mass brown dwarf, as previously reported. We also reconfirm that DENIS-P J1901391-370017 is diskless, as previously mentioned in the literature.

 

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References

Baraffe, I., Homeier, D., Allard, F., & Chabrier, G. (2015). New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit. Astronomy and Astrophysics, 577, Article A42. https://doi.org/10.1051/0004-6361/201425481
Bouy, H., Tamura, M., Barrado, D., Motohara, K., Castro Rodríguez, N., Miret-Roig, N., Konishi, M., Koyama, S., Takahashi, H., Huélamo, N., Bertin, E., Olivares, J., Sarro, L. M., Berihuete, A., Cuillandre, J.-C., Galli, P. A. B., Yoshii, Y., & Miyata, T. (2022). Infrared spectroscopy of free-floating planet candidates in Upper Scorpius and Ophiuchus. Astronomy and Astrophysics, 664, Article A111. https://doi.org/10.1051/0004-6361/202243850
Esplin, T. L., & Luhman, K. L. (2022). A Census of Stars and Disks in Corona Australis. The Astronomical Journal, 163, 64. https://doi.org/10.48550/arXiv.2111.14903
Gaia Collaboration, et al. (2023). Gaia Data Release 3. Summary of the content and survey properties. Astronomy and Astrophysics, 674, Article A1. https://doi.org/10.1051/0004-6361/202243940
Gagné, J., Mamajek, E. E., Malo, L., Riedel, A., Rodriguez, D., Lafrenière, D., Faherty, J. K., Roy-Loubier, O., Pueyo, L., Robin, A. C., & Doyon, R. (2018). BANYAN. XI. The BANYAN Σ Multivariate Bayesian Algorithm to Identify Members of Young Associations with 150 pc. The Astronomical Journal, 856, 23.
López Martí, B., Spezzi, L., Merín, B., Morales-Calderón, M., Bouy, H., Barrado y Navscués, D., & Eislöffel, J. (2010). The low-mass diskless population of Corona Australis. Astronomy and Astrophysics, 515, Article A31. https://doi.org/10.1051/0004-6361/200913718
Martín, E. L., Phan-Bao, N., Bessell. M., Delfosse, X., Forveille, T., Magazzu, A., Reyle, C., Bouy, H., & Tata, R. (2010). Spectroscopic characterization of 78 DENIS ultracool dwarf candidates in the solar neighborhood and the Upper Scorpii OB association. Astronomy and Astrophysics, 517, A53. https://doi.org/10.1051/0004-6361/201014202
Mathis, J. S. (1990). Interstellar dust and extinction. Annual Review of Astronomy and Astrophysics, 28, 37-70.
Peterson, D. E., Garatti, A. C., Bourke, T. L., Forbrich, J., Gutermuth, R. A., Jørgensen, J. K., Allen, L. E., Patten, B. M., Dunham, M. M., Harvey, P. M., Merín, B., Chapman, N. L., Cieza, L. A., Huard, T. L., Knez, C., Prager, B., &Evans II, N. J. (2011). The Spitzer Survey of Interstellar Clouds in the Gould Belt. III. A Multi-wavelength View of Corona Australis. The Astrophysical Journal Supplement Series, 194, 43.
Phan-Bao, N., Bessell. M. S., Nguyen-Thanh, D., Martín, E. L., Ho, P. T. P., Lee, C. F., & Parsons, H. (2017). Detection of lithium in nearby young late-M dwarfs. Astronomy and Astrophysics, 600, Article A19. https://doi.org/10.1051/0004-6361/201629785