Radial Velocity Variation of the 2.3-μm CO Band of α Orionis

• TANAKA Wataru

  National Astronomical Observatory of Japan

• OKADA Takafumi

  Okayama Astrophysical Observatory

• HASHIMOTO Osamu

  Gunma Astronomical Observatory

• TANABE Toshihiko

  The University of Tokyo

抄録

We report the results of 12 years of observations on the radial velocity variation of the 2.3-μm (4330 cm⁻¹) carbon monoxide absorption lines (first overtone vibration-rotation 2-0 band, R18–R31) of α Orionis (Betelgeuse, M1-2Ia-Iab) using a Fourier transform spectrometer located in the coudé room of the Okayama Astrophysical Observatory's 1.88-m telescope. The mean radial velocity and peak-to-peak amplitude were estimated as 24 km s⁻¹ and 7 km s⁻¹, respectively. However, the variation period could not be determined because the observational frequency data was insufficient.

収録刊行物

• 国立天文台欧文報告

  国立天文台欧文報告 16 (0), 1-4, 2022-03-01

  大学共同利用機関法人 自然科学研究機構 国立天文台

詳細情報

• CRID: 1390573242447954304
• NII論文ID: 130008165583
• DOI: 10.50916/pnaoj.16.0_1
• ISSN: 24361267
• ISSN: 09153640
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用可