SIMBAD references

2021RNAAS...5...73R - Research Notes of the AAS, 5, 73 (2021/April-0)

A New Look into K-giants' Chromospheres.

RAU G., PEACOCK S. and CARPENTER K.G.

Abstract (from CDS):

We report the preliminary modeling of archival Center for High Angular Resolution Astronomy (CHARA)/Visible spEctroGraph and polArimeter interferometric data of a K-giant star using the PHOENIX atmosphere code. We find that our preparatory model that includes only the chromospheric contribution closely reproduces the observed infrared Ca II triplet line profiles of a test star: the K-giant, β Cet. This preliminary work requires the additional modeling of the wind contribution to improve the agreement with observations. We plan to perform a systematic study of K-giants chromospheric emission with multi-wavelength and multi-technique observations and modeling. Our plans include extending the modeling work to include the underlying wind component for a larger set of stars. Stellar Parameters and Images with a Cophased Array, the second-generation instrument at CHARA, will be the ideal instrument to perform such observations and reveal the chromospheric activity of K-giants.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar winds - Stellar mass loss - Evolved stars - Late-type stars - Optical interferometry - K giant stars - Late-type giant stars - Astronomy data modeling - K stars - Giant stars - Interstellar medium - Astronomy data analysis

Simbad objects: 10

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