Small-Amplitude Red Variables in the AAVSO Photoelectric Program: Light Curves and Periods

Small-Amplitude Red Variables in the AAVSO Photoelectric Program: Light Curves and Periods

Small-amplitude red variables (SARVs) are M giants or supergiants which are pulsating with small amplitudes (up to 2.5 mag) and with time scales of 20-200 days or more. This paper reports on a 10-yr study of about two dozen SARVs, carried out through the American Association of Variable Star Observe...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Publications of the Astronomical Society of the Pacific 1996-02, Vol.108 (720), p.139-145
Hauptverfasser: Percy, John R., Desjardins, Adrien, Yu, Lawrence, Landis, Howard J.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomical magnitude
Astronomical photometry
Autocorrelation
Light curves
Mathematical minima
Stars
Supergiant stars
Variable stars
Visible spectrum
Weak minimum
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Small-amplitude red variables (SARVs) are M giants or supergiants which are pulsating with small amplitudes (up to 2.5 mag) and with time scales of 20-200 days or more. This paper reports on a 10-yr study of about two dozen SARVs, carried out through the American Association of Variable Star Observers (AAVSO) photoelectric photometry program. It has provided detailed information on the regularity, period, and amplitude of these stars. Most have well-defined periods in the 20-200 day range.Several also have a long secondary period. One (W Boo) appears to have two periods with a ratio of 2.3.
ISSN:0004-6280
1538-3873
DOI:10.1086/133703