Chromospheric activity of Southern Stars from the Magellan Planet Search Program

Abstract

I present chromospheric activity measurements of ~ 670 F, G, K and M main sequence stars in the Southern Hemisphere, from ~8000 archival high-resolution echelle spectra taken at Las Campanas Observatory since 2004. These stars were targets from the Old Magellan Planet Search, and are now potential targets for the New Magellan Planet Search that will look for rocky and habitable planets. Activity indexes (S-values) are derived from Ca II H & K line cores and then converted to the Mt. Wilson system. From these measurements, chromospheric (logrhk) indexes are derived, which are then used as indicators of the level of radial-velocity jitter, age and rotation periods these stars present.

6 Figure. Accepted for publication on ApJ

References in corpus (5)

• Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search
• Metallicities & Activities of Southern Stars
• An Activity Catalogue of Southern Stars

Cited by in corpus (46)

• Juliet: a versatile modelling tool for transiting and non-transiting exoplanetary systems
• Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles
• A High-Precision NIR Survey for RV Variable Low-Mass Stars
• Chromospheric activity as age indicator
• Stellar chromospheric activity of 1,674 FGK stars from the AMBRE-HARPS sample I. A catalogue of homogeneous chromospheric activity
• The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles
• The Moving Group Targets of the SEEDS High-Contrast Imaging Survey of Exoplanets and Disks: Results and Observations from the First Three Years
• Wide, Cool and Ultracool Companions to Nearby Stars from Pan-STARRS1
• Activity trends in young solar-type stars
• Improved Dynamical Masses for Six Brown Dwarf Companions Using Hipparcos and Gaia EDR3
• Young Stars Near Earth: The Octans-Near Association and Castor Moving Group
• SPOTS: The Search for Planets Orbiting Two Stars: II. First constraints on the frequency of sub-stellar companions on wide circumbinary orbits
• BAFFLES: Bayesian Ages for Field Lower-Mass Stars
• The age-mass-metallicity-activity relation for solar-type stars: Comparisons with asteroseismology and the NGC 188 open cluster
• Benchmark ages for the Gaia benchmark stars
• Ca II H&K stellar activity parameter: a proxy for stellar Extreme Ultraviolet Fluxes
• The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B
• The Magellan-TESS Survey I: Survey Description and Mid-Survey Results
• Two planetary companions around the K7 dwarf GJ 221 : a hot super-Earth and a candidate in the sub-Saturn desert range
• TESS Reveals a Short-period Sub-Neptune Sibling (HD 86226c) to a Known Long-period Giant Planet
• Activity time series of old stars from late F to early K. I. Simulating radial velocity, astrometry, photometry, and chromospheric emission
• Exploring the link between star and planet formation with Ariel
• Chromospherically Active Stars in the RAVE Survey. I. The Catalogue
• Linking chromospheric activity and magnetic field properties for late-type dwarf stars
• New orbits based on speckle interferometry at SOAR. II
• SALT observations of the Chromospheric Activity of Transiting Planet Hosts: Mass Loss and Star Planet Interactions
• The test case of HD26965: difficulties disentangling weak Doppler signals from stellar activity
• Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood
• Activity time series of old stars from late F to early K. II. Radial velocity jitter and exoplanet detectability
• Searching For Transiting Planets Around Halo Stars. II. Constraining the Occurrence Rate of Hot Jupiters
• The Origin of Superflares on G-Type Dwarf Stars of Various Ages
• Tracers of chromospheric structure. I. CaII H$\&$K emission distribution of 13000 F, G and K stars in SDSS DR7 spectroscopic sample
• A slow bar in the dwarf irregular galaxy NGC 3741
• On the Ages of Planetary Systems with Mean Motion Resonances
• Wolf 503 b: Characterization of a Sub-Neptune Orbiting a Metal-Poor K Dwarf
• A compact multi-planet system around a bright nearby star from the Dispersed Matter Planet Project
• A long-period massive planet around HD106515A
• Stellar Variability of the Exoplanet Hosting Star HD 63454
• Ultraviolet Flux Decrease Under a Grand Minimum from IUE Short Wavelength Observation of Solar Analogs
• The SPACE Program. I. The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
• The Evolution of the Solar-Stellar Activity
• Deriving Iodine-free spectra for high-resolution echelle spectrographs
• Precise Masses and Orbits for Nine Radial Velocity Exoplanets
• Magnetic cycles of Sun-like stars with different levels of coronal and chromospheric activity -- comparison with the Sun
• The SOL $\text{(Solar Origin and Life)}$ Project: Detailed characterization of candidates for the ZAMS and Subgiant stages
• A universal brown dwarf desert formed between planets and stars