Simultaneous intensive photometry and high resolution spectroscopy of Delta Scuti stars. 1: Mode typing of HD 106384 defined as FG Virginis

Details Simultaneous intensive photometry and high resolution spectroscopy of Delta Scuti stars. 1: Mode typing of HD 106384 defined as FG Virginis Simultaneous intensive photometry and high resolution spectroscopy of Delta Scuti stars. 1: Mode typing of HD 106384 defined as FG Virginis

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287...95m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 287, no. 1, p. 95-104

Astronomy and Astrophysics

Astrophysics

36

Astronomical Photometry, Astronomical Spectroscopy, Data Reduction, Line Shape, Stars, Stellar Oscillations, Curve Fitting, Least Squares Method, Time Series Analysis

Scientific paper

53 hours of photometric observations and 7 hours of consecutive high resolution spectroscopic observations of the Delta Scuti star HD 106384 defined as FG Vir have been obtained. From photometry we were able to detect 7 pulsation modes, 4 of which were also seen in the time series describing the variations of line profiles. From spectroscopy we also derived v sin i = 21 km/s and estimated i approximately = 30 deg. The ensuing discussion of the combined results of the analyses of photometric and spectroscopic data suggests that the dominant 12.72 c/d term is probably the first radial overtone mode, two other terms (9.66 and 19.86 c/d) are nonradial non-axisymmetric modes, while a fourth term (24.22 c/d) is an axisymmetric mode (may be radial). Problems connected to mode typing and possible effects due to rotational splitting are also discussed.

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