A spectral study of the Be/X-ray binary LSI+61°303

New optical intermediate dispersion spectra of the periodic radio star LSI +361°303 are presented. The Hα emission line shows a typical hell absorption spectrum, which means that the primary of this Be/X-ray binary may be a nearly equator-on Be star. The Hα emission line profile and its variation ar...

Full description

Saved in:
Bibliographic Details
Published in:Chinese astronomy and astrophysics 2001, Vol.25 (2), p.181-186
Main Authors: Qing-zhong, Liu, Heng-rong, Hang, Zhen-xi, Zhu
Format: Article
Language:English
Subjects:
Be/x-ray binary—emission line— equivalent width—accretion disk
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:New optical intermediate dispersion spectra of the periodic radio star LSI +361°303 are presented. The Hα emission line shows a typical hell absorption spectrum, which means that the primary of this Be/X-ray binary may be a nearly equator-on Be star. The Hα emission line profile and its variation are analyzed, and some parameters such as the Hα EW and V/R peak ratio change strongly near the radio maximum, and may exhibit periodic variability. Instead of having a wider minimum lasting for about half an orbital cycle as radio flux and V magnitude do, the Hα EW shows a deep minimum at phase ∼ 0.75. The accretion disk around the neutron star formed near its periastron passage is suggested to be responsible for the change when it eclipses the primary and its envelope.
ISSN:0275-1062
1879-128X
DOI:10.1016/S0275-1062(01)00059-5