| Issue |
A&A
Volume 671, March 2023
|
|
|---|---|---|
| Article Number | A46 | |
| Number of page(s) | 19 | |
| Section | Galactic structure, stellar clusters and populations | |
| DOI | https://doi.org/10.1051/0004-6361/202245261 | |
| Published online | 06 March 2023 | |
New members of the Lupus I cloud based on Gaia astrometry
Physical and accretion properties from X-shooter spectra⋆
1
Dipartimento di Fisica e Astronomia, Universitá degli Studi di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy
e-mail: fzmajidi71@gmail.com
2
INAF-Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, 35122 Padova, Italy
3
INAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy
4
INAF-Osservatorio Astrofisico di Catania, Via S. Sofia, 78, 95123 Catania, Italy
5
European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany
6
Department of Physics, University of Rome Tor Vergata, Via della ricerca scientifica 1, 00133 Rome, Italy
7
Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile
8
INAF-Rome Astronomical Observatory, Via di Frascati, 33, 00044 Monte Porzio Catone, Italy
9
Aix-Marseille Univ., CNRS, CNES, LAM, Marseille, France
Received:
21
October
2022
Accepted:
31
December
2022
We characterize twelve young stellar objects (YSOs) located in the Lupus I region, spatially overlapping with the Upper Centaurus Lupus (UCL) sub-stellar association. The aim of this study is to understand whether the Lupus I cloud has more members than what has been claimed so far in the literature and gain a deeper insight into the global properties of the region. We selected our targets using the Gaia DR2 catalog based on their consistent kinematic properties with the Lupus I bona fide members. In our sample of twelve YSOs observed by X-shooter, we identified ten Lupus I members. We could not determine the membership status of two of our targets, namely Gaia DR2 6014269268967059840 and 2MASS J15361110-3444473 due to technical issues. We found out that four of our targets are accretors, among them, 2MASS J15551027-3455045, with a mass of ∼0.03 M⊙, is one of the least massive accretors in the Lupus complex identified to date. Several of our targets (including accretors) are formed in situ and off-cloud with respect to the main filaments of Lupus I; hence, our study may hint that there are diffused populations of M dwarfs around Lupus I main filaments. In this context, we would like to emphasize that our kinematic analysis with Gaia catalogs played a key role in identifying the new members of the Lupus I cloud.
Key words: accretion / accretion disks / stars: atmospheres / stars: activity / stars: chromospheres / stars: low-mass / stars: pre-main sequence
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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