Helium λ 4009.27 Å Phase Variation in Alpha Virginis

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Published: Aug 30, 2007

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Sharifah Fetom Syed Zain
Nazhatulshima Ahmad
Mohd Zambri Zainuddin

Abstract

The spectroscopic observations have been carried out with the SBIG Self-guided spectrograph attached to the Celestron CG-14 which utilizes the Schmidt-Cassegrain design of the University of Malaya observatory. The spectra of spica, α Vir (67 Virginis, HIP 65474, HR 5056, HD 116658, BD -10 3672, SAO 157923) were obtained on four nights that is 28th and 30th August 2005, 1st September 2005 and 21st February 2006. The medium-resolution (R$_{min}$ ~ 3710.349) spectrum was taken in the λ range of 3900 to 4700 Å. Phase variation of He I λ₀ ~ 4009.27Å has been studied and shows the spectroscopic binary characteristic of the Spica with variable velocity between -344.0 ± 2.25 to -140.0 ± 2.25 km/s.

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How to Cite
Syed Zain, S. F., Ahmad, N., & Zainuddin, M. Z. (2007). Helium λ 4009.27 Ã… Phase Variation in Alpha Virginis. Malaysian Journal of Science, 26(2), 143–149. Retrieved from http://mjs.um.edu.my/index.php/MJS/article/view/8082
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Vol. 26 No. 2 (2007)
Section
Original Articles

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