Long-Term Spectral Variability of the Herbig Ae-Star HD 179218 |
| |
Authors: | O. V. Kozlova |
| |
Affiliation: | (1) Crimean Astrophysical Observatory, Ukraine;(2) Main (Pulkovo) Astronomical Observatory, Russian Academy of Sciences, Russia |
| |
Abstract: | The results of high-resolution long-term spectral monitoring of Herbig Ae star HD 179218 in the region of emission H line and the sodium resonance doublet Na I D are presented. The received data show the existence of short-term variability (about 10 days) and long-term wave-like variability of equivalent width EW, intensity of circumstellar (CS) emission I and parameters of H emission profile. The analysis of these data allows us to suppose the existence of the global variability of parameters of accretion disk. |
| |
Keywords: | stars variables individual stars HD 179218 |
本文献已被 SpringerLink 等数据库收录! |