SIMP J2154-1055: A New Low-Gravity L4$��$ Brown Dwarf Candidate Member of the Argus Association
| Autor: | Gagn��, Jonathan, Lafreni��re, David, Doyon, Ren��, Artigau, ��tienne, Malo, Lison, Robert, Jasmin, Nadeau, Daniel |
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| Rok vydání: | 2014 |
| Předmět: | |
| DOI: | 10.48550/arxiv.1407.5344 |
| Popis: | We present SIMP J21543454-1055308, a new L4$��$ brown dwarf identified in the Sondage Infrarouge de Mouvement Propre (SIMP) survey that displays signs of low gravity in its near-infrared spectrum. Using the Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), we show that it is a candidate member of the Argus association, albeit with a 21% probability that it is a contaminant from the field. Measurements of radial velocity and parallax will be needed to verify its membership. If it is a member of Argus (age 30-50 Myr), then this object would have a planetary mass of 10 $\pm$ 0.5 $M_{\mathrm{Jup}}$. 5 pages, 4 figures, accepted for publication in the ApJ Letters. Minor modifications to text and references |
| Databáze: | OpenAIRE |
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