Publication Abstracts

Rappaport et al. 1980

Rappaport, S., P.C. Joss, and R. Stothers, 1980: The apsidal motion test in 4U 0900-40. Astrophys. J., 235, 570-575, doi:10.1086/157660.

Recent SAS 3 observations of 4U 0900-40 have confirmed the apparent eccentricity of the orbit. Argument are given to show that the measured eccentrcity is not a spurious effect resulting from systematic reflection of the X-ray beam within the binary system. The longitude of periastron is not observed to have advanced in the 3.5 years since its original determination. The limit on apsidal motion is ω̇ ≲ 3.8° / yr which, in turn, restricts the apsidal motion constant to log k ≲ -2.5. These limits are used to constrain the physical parameters of the companion star HD 77581.

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BibTeX Citation

@article{ra00300h,
  author={Rappaport, S. and Joss, P. C. and Stothers, R.},
  title={The apsidal motion test in 4U 0900-40},
  year={1980},
  journal={Astrophys. J.},
  volume={235},
  pages={570--575},
  doi={10.1086/157660},
}

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RIS Citation

TY  - JOUR
ID  - ra00300h
AU  - Rappaport, S.
AU  - Joss, P. C.
AU  - Stothers, R.
PY  - 1980
TI  - The apsidal motion test in 4U 0900-40
JA  - Astrophys. J.
VL  - 235
SP  - 570
EP  - 575
DO  - 10.1086/157660
ER  -

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