DENIS-P J104814.7-395606.1: An M9 dwarfs at about 4 pc

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dc.creatorDelfosse, X.
dc.creatorForveille, T.
dc.creatorMartin, E. L.
dc.creatorGuibert, J.
dc.creatorBorsenberger, J.
dc.creatorCrifo, F.
dc.creatorAlard, C.
dc.creatorEpchtein, N.
dc.creatorFouqué, P.
dc.creatorSimon, G.
dc.creatorTajahmady, F.
dc.date2000-12-07
dc.date.accessioned2026-07-07T01:56:55Z
dc.date.available2026-07-07T01:56:55Z
dc.descriptionWe present the discovery of a previously unknown member of the immediate solar neighbourhood, DENIS-P J104814.7-395606.1 (hereafter DENIS 1048-39), identified while mining the DENIS database for new nearby stars. A HIRES echelle spectrum obtained with the 10-m Keck telescope shows that it is an M9 dwarf. DENIS 1048-39 has a very bright apparent magnitude (I=12.67) for its spectral type and colour (I-J=3.07), and is therefore very nearby. If it is single its distance is only 4.1 +- 0.6pc, ranking it as between our twelfth and fortyth closest neighbour. It is also the closest star or brown dwarf with a spectral type later than M7V. Its proper motion was determined through comparison of Sky atlas Schmidt plates, scanned by the MAMA microdensitometer, with the DENIS images. At 1.53"/yr it further attests the closeness of DENIS 1048-39, and hence its dwarf status. These characteristics make it an obvious target for further detailed studies.
dc.descriptionIn press in A&A Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/0012168
dc.identifierhttp://arxiv.org/abs/astro-ph/0012168
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/2182
dc.subjectAstrophysics
dc.titleDENIS-P J104814.7-395606.1: An M9 dwarfs at about 4 pc
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