Three active M dwarfs within 8 pc: L 449-1, L 43-72, and LP 949-15
Author
dc.contributor.author
R.-D, Scholz
Author
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Lo Curto, G.
es_CL
Author
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Méndez Bussard, René Alejandro
es_CL
Author
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Hambaryan, V.
es_CL
Author
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Costa Hechenleitner, Edgardo
es_CL
Author
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Henry, T. J.
es_CL
Author
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Schwope, A. D.
es_CL
Admission date
dc.date.accessioned
2014-01-08T17:05:31Z
Available date
dc.date.available
2014-01-08T17:05:31Z
Publication date
dc.date.issued
2005
Cita de ítem
dc.identifier.citation
A&A 439, 1127–1130 (2005)
en_US
Identifier
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DOI: 10.1051/0004-6361:20053346
Identifier
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https://repositorio.uchile.cl/handle/2250/126061
General note
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Artículo de publicación ISI.
en_US
Abstract
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Three nearby star candidates were selected as bright 2MASS point sources without associated optical sources,
i.e. with potentially large proper motions, subsequently confirmed by multi-epoch optical data from the SuperCOSMOS Sky
Surveys. All three objects are listed in the NLTT catalogue of high proper motion stars. Follow-up spectroscopic observations
allowed us to classify L 449-1 as M 4.0e dwarf at 5.7 pc, L 43-72 as M 4.5e dwarf at 7.2 pc, and LP 949-15 as M 5.0e dwarf at
6.1 pc, using known absolute JHKs magnitudes of dwarfs with corresponding spectral types, respectively. All three stars exhibit
Hα emission lines, and all three can be identified with bright X-ray sources. The available ROSAT light curves of two of the
objects show typical flare-like variability. Thus, all three stars are active, very close potential neighbours of the Sun, previously
not mentioned as such, certainly deserving further attention. In particular, these are very promising candidates for trigonometric
parallax programs.