V725 Sagittarii: From Population II Cepheid to Red Semiregular Variable

V725 Sgr is a unique pulsating variable star, first recognized by H. Swope, which increased its period from 12 to 21 days between 1926 and 1935. It was then neglected for three decades. We have used visual and photoelectric photometry of V725 Sgr from 1985 to 2004 to study its recent variability, us...

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Veröffentlicht in:	Publications of the Astronomical Society of the Pacific 2006-06, Vol.118 (844), p.805-808
Hauptverfasser:	Percy, John R., Molak, Anna, Lund, Hugh, Overbeek, Danie, Wehlau, Amelia F., Williams, Peter F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical magnitude Astronomy Cepheids Datasets Earth, ocean, space Exact sciences and technology Light curves Mathematical minima Population II stars Semiregular variables Stars Supergiant stars Variable stars
Online-Zugang:	Volltext
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