123 citations · 197 across the 9 of their papers we have counts for
14 papers · 1 filter
Chromospheric sensitivity of stellar spectral lines: an unsupervised machine learning classification
Juan I. Peralta, Mariela C. Vieytes
Stellar magnetic activity alters thousands of spectral lines, limiting high-precision radial-velocity measurements, abundance analyses, and planetary characterization. We present a…
HWO Target Stars and Systems: Activity and Rotation Catalog (ARC) of Potential Target Stars for the Habitable Worlds Observatory
Tara Fetherolf, Arvind F. Gupta, Elisabeth R. Newton +7
A major goal of the Habitable Worlds Observatory (HWO) is to precisely characterize exoplanets and their atmospheres. However, magnetic activity from an exoplanet's host star can c…
The influence of chromospheric activity on line formation
Mariela C. Vieytes, Lily L. Zhao, Megan Bedell
One of the primary sources of stellar spectral variability is magnetic activity. While our current understanding of chromospheric activity is largely derived from specific lines se…
The Fe i lines and the chromospheric activity
M. C. Vieytes
Neutral Fe lines are the most abundant in the spectrum of late stars. They are used to obtain different basic stellar parameters such as relative abundances, surface gravity, and e…
Modeling the Mg I from the NUV to MIR. II. Testing stellar models
J. I. Peralta, M. C. Vieytes, A. M. P. Mendez +1
Aims. We tested the new atomic model using atmospheric models of stars of different spectral types: the Sun (dG2), HD22049 (dK2, Epsilon Eridani), GJ 832 (dM2), and GJ 581 (dM3). M…
Modeling the MgI from the NUV to MIR: I. The Solar Case
J. I. Peralta, M. C. Vieytes, A. M. P. Mendez +1
Semi-empirical models of the solar atmosphere are used to study the radiative environment of any planet in our solar system. There is a need for reliable atomic data for neutral at…