Chemical Abundances for 25 JWST Exoplanet Host Stars with KeckSpec
Abstract
Using a data-driven machine learning tool we report T eff, $\mathrm{log}(g)$ , $v\sin (i)$ , and elemental abundances for 15 elements (C, N, O, Na, Mg, Al, Si, Ca, Ti, V, Cr, Mn, Fe, Ni, Y) for a sample of 25 exoplanet host stars targeted by JWST's first year of observations. The chemical diversity of these stars show that, while a number of their companion planets may have formed in a disk with chemistry similar to Solar, some JWST targets likely experienced different disk compositions. This sample is part of a larger forthcoming catalog that will report homogeneous abundances of ~4500 FGK stars derived from Keck/HIRES optical spectra.
- Publication:
-
Research Notes of the American Astronomical Society
- Pub Date:
- August 2022
- DOI:
- 10.3847/2515-5172/ac8676
- arXiv:
- arXiv:2207.13662
- Bibcode:
- 2022RNAAS...6..155P
- Keywords:
-
- Chemical abundances;
- High resolution spectroscopy;
- Exoplanet astronomy;
- Exoplanet atmospheric composition;
- Astrometric exoplanet detection;
- 224;
- 2096;
- 486;
- 2021;
- 2130;
- Astrophysics - Earth and Planetary Astrophysics;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 3 pages. Submitted to Research Notes of the AAS