HD 101065, the Most Peculiar Star: First Results from Precise Radial Velocity Study

Details HD 101065, the Most Peculiar Star: First Results from Precise Radial Velocity Study HD 101065, the Most Peculiar Star: First Results from Precise Radial Velocity Study

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005japa...26..185m&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 26, Issue 2-3, p.185

Astronomy and Astrophysics

Astrophysics

4

Stars: Oscillations, Roap Stars

Scientific paper

In this paper we discuss the prospects for asteroseismology with spatial resolution and motivate studies of the most chemically peculiar roAp star HD 101065. We present the first results from a high-precision radial velocity (RV) study of HD101065 based on data spanning four nights that were acquired using the HARPSechelle-spectrometer at the ESO3.6 m telescope. The analysis of individual nights showed the amplitude and phase modulation of the dominant mode. The analysis of the whole data set showed the presence of multi-periodic oscillations with two groups of equally-spaced modes. We find ν =65.2 μHz and δν =7.3 μHz for the large and the small spacing, respectively. HD 101065 is the only roAp star to show the existence of two groups of l =0 2 and l =1 3 excited modes.

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