DOI QR코드

DOI QR Code

대기 흡수선을 이용한 시선속도 측정 정밀도 향상

IMPROVEMENT OF RADIAL VELOCITY MEASUREMENT ACCURACY BY TELLURIC LINES

  • 발행 : 2009.12.31

초록

We present a method to improve the RV (radial velocity) measurements accuracy by using telluric lines. Telluric lines are used to estimate the wavelength scale drift over the detector of the spectrograph. In the case of BOES, the Echelle spectrograph at BOAO (Bohyunsan Optical Astronomical Observatory), the wavelength scale drift can be several hundreds m/s over 24 hours. Due to the wavelength scale drift, the RV measurements accuracy of BOES is limited to several hundreds m/s. By estimating the wavelength scale drift by telluric lines, we can remove its effect to improve the RV measurements accuracy to about 40 m/s.

키워드

참고문헌

  1. 한인우, 김강민, 이병철, Valyavin, G., 2007, BOES 데이터를 이용한 정밀 시선 속도 추정 프로그램 RVI2CELL 개발, 천문학논총, 22, 75 https://doi.org/10.5303/PKAS.2007.22.3.075
  2. Butler, P., Marcy, G., Williams, E., McCarthy, C., & Dosanjh, P., 1996, Attaining Doppler Precision of 3 M s-1, PASP, 108, 500 https://doi.org/10.1086/133755
  3. Campbell, B. & Wlaker, G., 1979, Precision radial velocities with an absorption cell, PASP, 91, 540 https://doi.org/10.1086/130535
  4. Griffin, D. F., 1973, On the possibility of determining stellar radial velocities to 0.01 km/s, MNRAS, 162, 243 https://doi.org/10.1093/mnras/162.3.243
  5. Gray, D., Brown, K. 2006, PASP, 118, 399 https://doi.org/10.1086/499928
  6. Kim, Kang-Min, Han, Inwoo, Valyavin, G. G., Plachinda, S., Jang, Jeong Gyun., Jang, Be-Ho., Seong, Hyeon Cheol., Lee, Byeong-Cheol., Kang, Dong-Il., Park, Byeong-Gon., et al., 2007, The BOES Spectropolarimet -er for Zeeman Measurements of Stellar Magnetic Fields, PASP, 119, 1052 https://doi.org/10.1086/521959
  7. Kim, K. M., et al., 2002, Design and Manufacturing of the Cassegrain Interface Module of the BOAO Echelle Spectrograph, JKAS, 35, 221 https://doi.org/10.5303/JKAS.2002.35.4.221
  8. Marcy, G. & Butler, P., 1992, Precision radial velocities with an iodine absorption cell, PASP, 104, 270 https://doi.org/10.1086/132989
  9. Mayor, M., Pepe, F., Quelotz, D., et al., 2003, Setting New Standards with HARPS, Msngr, 114, 20
  10. Pepe, F., Mayor, M., Delabre, B., et al., 2000, HARPS: a new high-resolution spectrograph for the search of extrasolar planets, Proc. SPIE, 4008, 582 https://doi.org/10.1117/12.395516