A SEARCH FOR CHROMOSPHERIC EMISSION IN TU CASSIOPEIAE SPECTRA

Authors

Arne A. Henden, Department of Astronomy, Indiana University, Bloomington, Indiana
Robert H. Cornett, Systems and Applied Sciences Corporation, Hyattsville, Maryland
Edward G. Schmidt, University of Nebraska-LincolnFollow

Date of this Version

April 1984

Comments

Published in Publications of the Astronomical Society of the Pacific PASP 96, 310 (1984). Published by University of Chicago Press; copyright © 1984 Astronomical Society of the Pacific; reproduced by permission. http://www.journals.uchicago.edu/PASP/

Abstract

We have searched high-resolution spectra of the multimode cepheid TU Cas for evidence of chromospheric emission. Spectral regions covered include the Ca _II near-IR triplet near 8600 Å, Hα, Can_II H and K, Mg _II h and k; phase coverage in both primary and secondary modes was reasonably complete. There was no evidence for changes other than those caused by temperature variation. The observed lack of emission makes unlikely current mass loss (and resulting helium enrichment) by means of stellar winds.