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Toshihito Ishida

  (石田 俊人)

Profile Information

Affiliation
University of Hyogo
Degree
Ph. D(Mar, 1990, Tohoku University)

Researcher number
70382281
J-GLOBAL ID
202001007067032420
researchmap Member ID
R000009778

Papers

 8
  • Toshihito Ishida
    Stars and Galaxies, 06, Dec, 2023  Peer-reviewedLead authorCorresponding author
  • Toshihito Ishida
    Stars and Galaxies, 03(3), Dec, 2020  Peer-reviewed
  • Toshihito Ishida
    RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 17(6), Jun, 2017  Peer-reviewed
    A recently found double-mode Cepheid with the shortest known period in our Galaxy and abnormal period ratio, V371 Per, is investigated by linear nonadiabatic pulsation models. V371 Per is likely to be crossing the instability strip for the first time, because the mass derived from pulsation models is larger than the evolution mass for the second or higher crossing objects. This result seems to support the conclusion obtained from spectroscopic observation. We also found that models with observed period and period ratio of V371 Per need to have mass and T-eff in a narrow range which shifts as heavy element abundance Z changes. We have checked the agreement between T-eff ranges estimated observationally and derived from pulsation models using observational Z. We found that those ranges overlap marginally. We need more spectroscopic estimations of T-eff and [Fe/H], and more photometric monitoring to estimate the evolutional period change for confirmation of our result.
  • Publications of the Astronomical Society of Japan, 44(2) p101-107, May, 1992  Peer-reviewed
  • Publications of the Astronomical Society of Japan, 43(6) p795-807, Dec, 1991  Peer-reviewed

Misc.

 1