VizieR Online Data Catalog: Spectroscopic activity indicators of TIC stars (Medina+, 2020)

We begin with the volume-complete sample of 419 main-sequence stars with masses between 0.1 and 0.3M_ȯ and distances shorter than 15pc from Winters+ (2020, J/AJ/161/63). For this study we only use a subset of these stars, namely those that are single. See Section 2.

We obtained two or more high-resolution spectra for each of the 125 star in our final sample. For stars with declinations below -15deg, we use the cross-dispersed, fiber-fed echelle CTIO HIgh ResolutiON (CHIRON) spectrogragh located on the CTIO/SMARTS 1.5m telescope at CTIO (4100-8700Å with R~80,000). We gathered spectra for all stars with declinations greater than 15 degrees with the high-throughput, fiber-fed, Tillinghast Reflector Echelle Spectrograph (TRES) located on the 1.5m Tillinghast Reflector at the Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona (3900-9100Å with R~44,000). See Section 3.

The MEarth-North and MEarth-South arrays each comprise eight 40cm telescopes and are located on Mt. Hopkins in Arizona and at Cerro Tololo Inter-American Observatory (CTIO), Chile, respectively. We follow the same method used in Newton+ (2016, J/ApJ/821/93 and 2018, J/AJ/156/217) to estimate the rotation periods of one additional star with MEarth-North and 17 additional stars with MEarth-South. See Section 4.

As part of its survey of the southern ecliptic hemisphere in year 1, TESS obtained two-minute cadence data of the 125 stars in our sample through a guest investigator program (PI Winters; G011231). See Section 5.

(2 data files).