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The Pisgah Automated Survey: A Photometric Search for Low-mass Detached Eclipsing Binaries and Other Variable Stars
M. Lopez-Morales, J. Christopher Clemens
The Pisgah Survey, located at the facilities of the Pisgah Astronomical Research Institute in Rosman NC, is a low cost project to acquire fully-automated I band photometry of selec…
A puzzling periodicity in the pulsating DA white dwarf G 117-B15A
Rubina Kotak, Marten H. van Kerkwijk, J. Christopher Clemens
We present time-resolved optical spectrophotometry of the pulsating hydrogen atmosphere (DA) white dwarf G 117-B15A. We find three periodicities in the pulsation spectrum (215s, 27…
High Resolution Spectroscopy of the Pulsating White Dwarf G29-38
Susan E. Thompson, J. C. Clemens, M. H. van Kerkwijk +1
We present the analysis of time-resolved, high resolution spectra of the cool white dwarf pulsator, G29-38. From measuring the Doppler shifts of the H-alpha core, we detect velocit…