dorsal/arxiv
View SchemaA New Pleiades Member at the Lithium Substellar Boundary
| Authors | E. L. Martin, G. Basri, J. E. Gallegos, R. Rebolo, M. R. Zapatero-Osorio, V. J. S. Bejar |
|---|---|
| Categories | |
| ArXiv ID | physics/9803026 |
| URL | https://arxiv.org/abs/physics/9803026 |
| DOI | 10.1086/311350 |
Abstract
We present the discovery of an object in the Pleiades open cluster, named Teide 2, with optical and infrared photometry which place it on the cluster sequence slightly below the expected substellar mass limit. We have obtained low- and high-resolution spectra that allow us to determine its spectral type (M6), radial velocity and rotational broadening; and to detect H$_\alpha$ in emission and Li I 670.8 nm in absorption. All the observed properties strongly support the membership of Teide 2 into the Pleiades. This object has an important role in defining the reappearance of lithium below the substellar limit in the Pleiades. The age of the Pleiades very low-mass members based on their luminosities and absence or presence of lithium is constrained to be in the range 100--120 Myr.
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"abstract": "We present the discovery of an object in the Pleiades open cluster, named\nTeide 2, with optical and infrared photometry which place it on the cluster\nsequence slightly below the expected substellar mass limit. We have obtained\nlow- and high-resolution spectra that allow us to determine its spectral type\n(M6), radial velocity and rotational broadening; and to detect H$_\\alpha$ in\nemission and Li I 670.8 nm in absorption. All the observed properties strongly\nsupport the membership of Teide 2 into the Pleiades. This object has an\nimportant role in defining the reappearance of lithium below the substellar\nlimit in the Pleiades. The age of the Pleiades very low-mass members based on\ntheir luminosities and absence or presence of lithium is constrained to be in\nthe range 100--120 Myr.",
"arxiv_id": "physics/9803026",
"authors": [
"E. L. Martin",
"G. Basri",
"J. E. Gallegos",
"R. Rebolo",
"M. R. Zapatero-Osorio",
"V. J. S. Bejar"
],
"categories": [
"physics.space-ph"
],
"doi": "10.1086/311350",
"title": "A New Pleiades Member at the Lithium Substellar Boundary",
"url": "https://arxiv.org/abs/physics/9803026"
},
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