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Multiplicity among M dwarfs
Abstract
Surveys of M dwarfs within 20 pc are examined to determine the incidence of stellar companions. Observational data are drawn from high-quality surveys, including IR-array imaging, precise velocities, IR speckle interferometry, and visual imaging, and their respective incompleteness is determined. The number of companions per AU of semimajor axis is computed and found to decline monotonically toward larger semimajor axes. The period distribution exhibits a unimodal broad maximum with a peak in the range 9-220 yr, corresponding to separations of 3-30 AU, similar to that for G dwarf binaries. Fifty-eight percent of nearby M dwarf primaries are found to be single, and 42 +/- 9 percent have companions. The M-dwarf binary frequency is lower than that for G dwarfs (about 57 percent), owing partly to the smaller range of companion masses included, i.e., companions less massive than the M- or G-type primary.
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Cited by
The Milky Way Tomography with SDSS. I. Stellar Number Density Distribution
Jurić, M., Ivezić, Ž., Brooks, A., Lupton, R. H., Schlegel, D., Finkbeiner, D., Padmanabhan, N., Bond, N., Sesar, B., Rockosi, C. M., et al. (2008) · The Astrophysical Journal · doi:10.1086/523619 · Cited by 1,312
Moe, M., & Di Stefano, R. (2017) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/aa6fb6 · Cited by 1,207
The theory of brown dwarfs and extrasolar giant planets
Burrows, A., Hubbard, W. B., Lunine, J. I., & Liebert, J. (2001) · Reviews of Modern Physics · doi:10.1103/revmodphys.73.719 · Cited by 819
Exploring the Full Stellar Population of the Upper Scorpius OB Association
Preibisch, T., Brown, A. G. A., Bridges, T., Guenther, E., & Zinnecker, H. (2002) · The Astronomical Journal · doi:10.1086/341174 · Cited by 349
MAPPING THE SHORES OF THE BROWN DWARF DESERT. II. MULTIPLE STAR FORMATION IN TAURUS-AURIGA
Kraus, A. L., Ireland, M. J., Martinache, F., & Hillenbrand, L. A. (2011) · The Astrophysical Journal · doi:10.1088/0004-637x/731/1/8 · Cited by 325
Metadata
- Authors
- Fischer, D. A., & Marcy, G. W.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1992-09
- Volume
- 396
- Pages
- 178
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2070606946
- Cited by
- 671
- References
- 0
- FWCI
- 3.93
- Type
- journal article
- Language
- en
- Open access
- closed
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