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ρ Pup: A Monoperiodic Radially Pulsating δ Set Star

Published online by Cambridge University Press:  15 February 2018

Eloy Rodríguez ,
Angel Rolland  and
Pilar López de Coca
Eloy Rodríguez
Affiliation:
Instituto de Astrofísica de Andalucía, Apartado 3004, 18080-Granada, Spain
Angel Rolland
Affiliation:
Instituto de Astrofísica de Andalucía, Apartado 3004, 18080-Granada, Spain
Pilar López de Coca
Affiliation:
Instituto de Astrofísica de Andalucía, Apartado 3004, 18080-Granada, Spain

Abstract

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ρ Pup is a δ Scuti type pulsator with relatively low amplitude (ΔV∼0.m09). Analysis of the data from different sources, using the Fourier Transform method, establishes ρ Pup as a monoperiodic pulsator. Using the classical O-C method, it is found that the pulsation of this star can be well described by means of a linear ephemeris with a period of P=0.d140881372 over more than eighty years. The nature of radial or nonradial pulsation is discussed on the basis on the derived phase shifts and amplitude ratios between different colours. The results indicate that ρ Pup is a radial pulsator.

Type
Windows on the Instability Strip
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 430
Copyright
Copyright © Cambridge University Press 1993