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visual — binaries

International Astronomical Union Colloquium (1)

International Astronomical Union (1)

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Photometry of the δ Scuti Star DG Leo: Preliminary Results
P. Lampens, R. Garrido, L. Parrao, J.H. Peña, T. Arentoft, Y. Frémat
Journal:

International Astronomical Union Colloquium / Volume 191 / August 2004

Published online by Cambridge University Press:

22 February 2018, pp. 73-74

Print publication:

August 2004
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New uvby photoelectric photometry has been acquired for the triple star DG Leo at two different observatories equipped with analogous instrumentation. A preliminary period analysis indicates the presence of at least 3 close δ Scuti frequencies (10-12 c/d, 3-6 mmag) and a slow variation. This slow variation fits quite well with half the orbital period of the spectroscopic binary; the noise level in the amplitude spectrum is only 3–4 mmag (after prewhitening).