activity
20192025
most citedA Spectroscopic Analysis of the California-Kepler Survey Sample: I. Stellar Parameters, Planetary Radii and a Slope in the Radius Gap

119 citations · 170 across the 9 of their papers we have counts for

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astro-ph.SR2025

A Near-Infrared and Optical Study of NGC 5822: An Open Cluster Hosting Barium-stars and Lithium-Enriched Giant Stars

N. Holanda, V. Loaiza-Tacuri, A. Sonally +7

We present a chemical abundance study of giant stars in the Galactic open cluster NGC 5822, which hosts two barium stars (#002 and #201) and three lithium-enriched giants (#006, #1…

astro-ph.SR2025

Chemical Abundances of M and G Dwarfs in the Hyades and Coma Berenices Open Clusters from APOGEE Spectra

Deusalete Vilar, Diogo Souto, Katia Cunha +8

Open clusters are one of the best astrophysical laboratories we have available for stellar astrophysics studies. This work presents metallicities and individual abundances for four…

astro-ph.SR2024★ 12 cited

Magnetic Fields of M Dwarfs from the Pleiades Open Cluster

Fabio Wanderley, Katia Cunha, Oleg Kochukhov +10

Average magnetic field measurements are presented for 62 M-dwarf members of the Pleiades open cluster, derived from Zeeman-enhanced Fe I lines in the H-band. An MCMC methodology wa…

astro-ph.SR2023★ 11 cited

Correlation between activity indicators: H and Ca II lines in M-dwarf stars

R. V. Ibañez Bustos, A. P. Buccino, M. Flores +2

Different approaches have been adopted to study short- and long-term stellar magnetic activity, and although the mechanisms by which low-mass stars generate large-scale magnetic fi…

astro-ph.SR2023★ 6 cited

A Spectroscopic Analysis of a Sample of K2 Planet-Host Stars: Stellar Parameters, Metallicities and Planetary Radii

V. Loaiza-Tacuri, Katia Cunha, Verne V. Smith +5

The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on spectra of…