High Resolution Spectroscopy and Spectropolarimetry of some late F-/early G-type sun-like stars as targets for Zeeman Doppler imaging

TL;DR

This study used high-resolution spectroscopy and spectropolarimetry to identify young sun-like stars with magnetic fields suitable for Zeeman Doppler imaging, aiding the understanding of early solar evolution.

Contribution

It provides a detailed survey of late F-/early G-type stars, identifying specific targets with magnetic fields for future magnetic topology studies.

Findings

Magnetic fields detected in multiple stars, including HIP 21632 and HIP 43720.

Identification of several binary and potential triple star systems.

Selection of stars suitable for Zeeman Doppler imaging follow-up.

Abstract

High resolution spectroscopy and spectropolarimetry have been undertaken at the Anglo-Australian Telescope in order to identify suitable targets for magnetic studies of young sun-like stars, for the proxy study of early solar evolution. This study involved the investigation of some variable late F-/early G-type sun-like stars originally identified by the Hipparcos mission. Of the 38 stars observed for this study, HIP 31021, HIP 64732, HIP 73780 were found to be spectroscopic binary stars while HIP 19072, HIP 67651 and HIP 75636 are also likely to be binaries while HIP 33111 could even be a triple system. Magnetic fields were detected on a number of the survey stars: HIP 21632, HIP 43720, HIP 48770, HIP 62517, HIP 71933, HIP 77144, HIP 89829, HIP 90899 and HIP 105388, making these stars good candidates for follow-up Zeeman Doppler imaging studies.