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Radial and Rotational Velocities of a Volume-Complete Sample of M Dwarfs with Masses 0.1-0.3 Msun within 15 parsecs
Jennifer G. Winters, Emily K. Pass, David Charbonneau +7
We present the results from a five-year campaign to gather multi-epoch, high-resolution spectra of a volume-complete sample of 413 M dwarfs with masses 10-30% that of the Sun that…
The Mass Dependence of Hα Emission and Stellar Spindown for Fully Convective M Dwarfs
Emily K. Pass, David Charbonneau, David W. Latham +4
Fully convective M dwarfs typically remain rapidly rotating and magnetically active for billions of years, followed by an abrupt and mass-dependent transition to slow rotation and…
Nova Sagittarii 1943 (V1148 Sgr): A Luminous Red Nova?
Howard E. Bond, Jessica Mink, Allison Doane +1
Nova Sagittarii 1943 (V1148 Sgr) was an 8th-mag optical transient that was unusual in having a late-type spectrum during its outburst, in striking contrast to the normal high-excit…
Variability Timescales of H on Active Mid-to-Late M dwarfs
Amber A. Medina, David Charbonneau, Jennifer G. Winters +2
We present a study of the variation timescales of the chromospheric activity indicator H on a sample of 13 fully-convective, active mid-to-late M stars with masses between 0.1--…
Spectroscopic Orbits of Eleven Nearby, Mid-to-Late M Dwarf Binaries
Jennifer G. Winters, Jonathan M. Irwin, David Charbonneau +7
We present the spectroscopic orbits of eleven nearby, mid-to-late M dwarf binary systems in a variety of configurations: two single-lined binaries (SB1s), seven double-lined binari…
MWC349A and B Are Not Gravitationally Bound: New Evidence
P. M. Drew, V. Strelnitski, H. A. Smith +3
The age and evolutionary status of MWC349A, the unique emission line star with maser and laser radiation in hydrogen recombination lines, remain unknown because the spectrum of the…
The H emission of nearby M dwarfs and its relation to stellar rotation
Elisabeth R. Newton, Jonathan Irwin, David Charbonneau +3
The high-energy emission from low-mass stars is mediated by the magnetic dynamo. Although the mechanisms by which fully convective stars generate large-scale magnetic fields are no…