Printer Friendly
The Free Library
22,728,960 articles and books

A photometric study of Slowly Pulsating B Stars.

We present the results of an extended photometric pho·tom·e·try  
Measurement of the properties of light, especially luminous intensity.

 study of a sample of Slowly Pulsating B Stars (SPBs.) Our observations were made using the College of Charleston The College of Charleston (CofC) is a public university located in historic downtown Charleston, South Carolina. The College was founded in 1770 and chartered in 1785, making it the oldest college or university in South Carolina, the 13th oldest institution of higher learning in  Automatic Photometric Telescope located at Fairborn Observatory in Washington Camp, AZ. We observed using the technique of differential photometry photometry (fōtŏm`ətrē), branch of physics dealing with the measurement of the intensity of a source of light, such as an electric lamp, and with the intensity of light such a source may cast on a surface area.  in the Stromgren system. SPBs are hot, young stars that pulsate pul·sate
To expand and contract rhythmically; beat.
 in a complex, nonradial fashion. Because they were discovered only fairly recently, not much data is available on these nonradial pulsators, and the aim of this research is to obtain a better understanding of SPB stars. By analyzing the light variations, the pulsational frequencies can be determined. Comparison with theoretical models enables us to estimate the pulsational mode as well as some physical properties of the star. Our study includes the known SPBs HD138764, HD222555, and HD21071 and the candidate stars HD192660 and HD44112. For the known members we have found one or more frequencies in addition to those determined by previous research. As for the other two candidate stars, we have detected pulsational frequencies which in fact point to classification as an SPB star. In addition to frequency determination, we have also found approximate ages and masses of these stars. * Supported by NSF Grant ast-0071260 as well as funding from NASA NASA: see National Aeronautics and Space Administration.
 in full National Aeronautics and Space Administration

Independent U.S.
 under the South Carolina Space Grant program.
COPYRIGHT 2005 South Carolina Academy of Science
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2005 Gale, Cengage Learning. All rights reserved.

 Reader Opinion




Article Details
Printer friendly Cite/link Email Feedback
Author:Andrews, Jennifer; Dukes, Robert
Publication:Bulletin of the South Carolina Academy of Science
Date:Jan 1, 2005
Previous Article:Design and cloning of hammerhead ribozymes targeted to NL43 HIV-1 Vif MRNA.
Next Article:Comparison of ultra-high temperature milk and skim milk consumption behaviors among elementary school-aged students in one region of South Carolina:...

Related Articles
Publications of the State Academies of Science.
Optical and radio observations of V7111 Tauri. (South Carolina Academy of Sciences Abstracts).
Schedule of annual meeting.
Randolph M. Brooks Dreher High School, Columbia, SC.
Topical sessions.
A tale of two stars: analysis of light variations in candidate Slowly Pulsating B and Gamma Doradus variables.
President's report: David J. Stroup, President.
Report of the Secretary.
South Carolina Academy of Science Legislative Funds Report 2004.
Journal of the South Carolina Academy of Science.

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters