EWs of eta Carinae from ~30yrs sp. monitoring

Eta Carinae ({eta} Car) exhibits a unique set of P Cygni profiles with both broad and narrow components. Over many decades, the spectrum has changed-there has been an increase...海山二（Eta Carinae，简称Eta Car）呈现出一组独特的P Cygni谱线轮廓（P Cygni profiles），兼具宽成分与窄成分。数十年来，其光谱已发生变化——出现了增强……