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Two new eJAAVSO preprints: Maxima of 67 SPPs; Longterm monitoring of semiregulars

eJAAVSO

ej294

Recent Maxima of 67 Short Period Pulsating Stars

Gerard Samolyk

P.O. Box 20677, Greenfield, WI 53220

Received January 8, 2015; accepted January 8, 2015

Abstract

This paper contains times of maxima for 67 short period pulsating stars (primarily RR Lyrae and delta Scuti stars).
These maxima represent the CCD observations received by the AAVSO Short Period Pulsator (SPP) section in 2014.

www.aavso.org/ejaavso

 

ej293

Long Term Photometric and Spectroscopic Monitoring of Semiregular Variable Stars

Robert R. Cadmus, Jr.

Department of Physics, Grinnell College, Grinnell, IA 50112

Received September 12, 2014; revised December 8, 2014; accepted December 9, 2014

Abstract

The understanding of semiregular variable stars presents a number of challenges that can be addressed by consistent long term photometric and spectroscopic monitoring. The observing program at Grinnell College has generated a large body of such data that has been used to investigate modes of pulsation, the role of dust, the possible role of chaos, and other issues. This paper summarizes these efforts and encourages other observers to help maintain the continuity of these data sets.

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