H-Alpha Spectra of Early and Late Types Stars

Main Article Content

Ahmad N
Zainuddin M.Z

Abstract

Preliminary results of basic analysis to study the properties of $H_\alpha$ line of early and late type stars using spectroscopy technique are presented. Spectra of 12 stars brighter than $M_v$= 2.99 have been obtained at dispersion of 1.07Ã…/pixel using SBIG spectrograph at the prime focus of 12-inch telescope. The analyses of line profiles which considered on their full width at half maximum (FWHM), equivalent width (EW), central intensity or line depth ($R_c$) and central line were conducted under Visual Spectroscopy software. We have measured the profiles of $H_\alpha$ line in B, A, F, K, and M types of stars. We found out that the profiles are strongest at A type and becomes weak as the stars evolved to the late types. It also shows that the line profile for the very early type star such as B is quite weak. The measurement of line profiles included the luminosity, which gave an estimation of their size.

Downloads

Download data is not yet available.

Article Details

How to Cite
N, A., & M.Z, Z. (2003). H-Alpha Spectra of Early and Late Types Stars. Malaysian Journal of Science, 22(2), 1157–161. Retrieved from https://mjs.um.edu.my/index.php/MJS/article/view/8531
Section
Original Articles