Grid-based seismic modelling at high and low signal-to-noise ratios

Author： Hekker S.   Ball W. H.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|564|issue|A105-A105

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.564, Iss.issue, 2014-04, pp. : A105-A105

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Recently, the CoRoT target HD 175272 (F5V), which shows a weak signal of solar-like oscillations, was modelled by a differential asteroseismic analysis (Ozel et al. 2013, AA, 558, A79) relative to a seismically similar star, HD 181420 (F2V), for which there is a clear signature of solar-like oscillations. The results provided by Ozel et al. indicate the possibility of HD 175272 having subsolar mass, while being of the order of 1000 K hotter than the Sun. This seems unphysical – standard stellar evolution theory generally does not predict solar-metallicity stars of subsolar mass to be hotter than about 6000 K – and calls for a reanalysis of this star.

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