• HD 101065, the most peculiar star: First results from precise radial velocity study

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      https://www.ias.ac.in/article/fulltext/joaa/026/02-03/0185-0191

    • Keywords

       

      Stars: oscillations; roAp stars

    • Abstract

       

      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 HD 101065 based on data spanning four nights that were acquired using the HARPS echelle-spectrometer at the ESO 3.6 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 Δυ = 65.2μHz and δυ = 7.3μHz for the large and the small spacing, respectively. HD 101065 is the only roAp star to show the existence of two groups ofl = 0, 2 andl = 1, 3 excited modes.

    • Author Affiliations

       

      D. E. Mkrtichian1 2 A. P. Hatzes3

      1. ARCSEC, Sejong University, Seoul - 143 747, Korea
      2. Astronomical Observatory, Odessa National University, Shevchenko Park, Odessa - 65014, Ukraine
      3. Thüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg - D-07778, Germany
    • Dates

       
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