Hα Emission From Active Equal-Mass, Wide M Dwarf Binaries1
نویسندگان
چکیده
منابع مشابه
Two nearby M dwarf binaries from 2 MASS
We report the discovery of two binary M dwarf systems in the immediate solar neighborhood using 2MASS. The first is an M6.5 companion to the nearby G star HD 86728 (Gl 376). The known properties of HD 86728 indicate that the M dwarf (Gl 376B) is old, metal-rich and only 14.9 parsecs away. The M dwarf is highly active with both Hα and X-ray emission. Thus, Gl 376B offers the opportunity to study...
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2MASSI J1315309−264951 is an L3 dwarf with strong Hα emission discovered in the course of a colorselected survey for active galactic nuclei using the Two-Micron All-Sky Survey (2MASS). The strength of its Hα emission decreased by about a factor of two between two epochs separated by 137 days. This is the first time that variable Hα emission has been reported in an L dwarf, and is probably the f...
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In Hall (2002) I reported that 2MASSI J1315309−264951 is an L dwarf with strong Hα emission. Two spectroscopic epochs appeared to show that the Hα was variable, decreasing from 121 Å to 25 Å EW, which I interpreted as a flare during the first observation. Gizis (2002) independently discovered this object, and his intermediate spectroscopic epoch shows Hα with 97 Å EW. A new fourth epoch of spec...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 2014
ISSN: 0004-6280,1538-3873
DOI: 10.1086/679329