Kinematics and Velocity Ellipsoid of Halo Red Giants

Here, we aim to determine the kinematical properties, velocity ellipsoid and Oort constants using a sample of halo red giants. The study is based mainly on the space and radial velocities of 1583 red giant stars collected from the SEGUE-1 and SEGUE-2 surveys. We divided the sample into three subsamples: the inner halo, the outer halo and the stars near the galactic plane. The fitting of the radial velocity equation gives a mean of Oort constants A = 15.6 ± 1.6 km s-1 kpc-1 and B = -13.9 ± 1.8 km s-1 kp-1 and angular velocity |A - B | = 29.5 ± 0.2 km s-1 kpc-1, which implies a rotational velocity of 221.25 ± 26.66 km s-1 if we take the distance to the galactic center as 7.5 kpc.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    R. Carney and D. Latham, Astrophys. J., 92, 60, 1986.

    ADS  Google Scholar 

  2. 2.

    B. W. Carney, Publ. Astron. Soc. Pacif., 96, 841, 1984.

    ADS  Article  Google Scholar 

  3. 3.

    F. D. A. Hartwick, NATO ESI Ser. 207, eds. G.Gilmore & B.Carswell, (Dordrecht: Reidel), p.281, 1987.

  4. 4.

    C. A. Allen, A. Poveda, and W. J. Schuster, Astron. Astrophys., 244, 280, 1991.

    ADS  Google Scholar 

  5. 5.

    R. Zinn, ASP Conf. Ser. 48, eds. G.H.Smith & J.P.Brodie, (San Francisco), 38, 1993.

  6. 6.

    G. W. Preston, S. A. Shectman, and T. C. Beers, Astrophys. J., 375, 121, 1991.

    ADS  Article  Google Scholar 

  7. 7.

    T. D. Kinman, N. B. Suntzeff, and R. P. Kraft, Astron J., 108, 1722, 1994.

    ADS  Article  Google Scholar 

  8. 8.

    A. Miceli et al., Astrophys. J., 678, 865, 2008.

    ADS  Article  Google Scholar 

  9. 9.

    J. E. Norris and S. G. Ryan, Astrophys. J., 340, 739, 1989.

    ADS  Article  Google Scholar 

  10. 10.

    S. R. Majewski, Astrophys. J., 78, 87, 1992.

    ADS  Article  Google Scholar 

  11. 11.

    B. W. Carney et al., Astron J., 112, 668, 1996.

    ADS  Article  Google Scholar 

  12. 12.

    R. Wilhelm et al., ASP Conf. Ser., 92, 171, 1996.

    ADS  Google Scholar 

  13. 13.

    T. D. Kinman et al., Mon. Not. Roy. Astron. Soc., 371, 1381, 2007.

    ADS  Article  Google Scholar 

  14. 14.

    Y. W. Lee, H. B. Gim, and D. I. Casetti-Dinescu, Astron J., 661, L49, 2007.

    ADS  Article  Google Scholar 

  15. 15.

    D. Carollo, T. C. Beers, Y. S. Lee et al., Nature, 450, 1020, 2007.

    ADS  Article  Google Scholar 

  16. 16.

    I. G. McCarthy, A. S. Font, R. A. Crain et al., Mon. Not. Roy. Astron. Soc., 420, 2245, 2012.

    ADS  Article  Google Scholar 

  17. 17.

    S. L. Martell, J. P. Smolinski, T. C. Beers et al., Astron. Astrophys., 534, 136, 2011.

    ADS  Article  Google Scholar 

  18. 18.

    K. N. Abazajian, J. K. Adelman-McCarthy, M. A. Agueros et al., Astrophys. J. Suppl. Ser., 182, 543, 2009.

    ADS  Article  Google Scholar 

  19. 19.

    B. Yanny, C. M. Rockosi, H. J. Newberg et al., Astron J., 137, 4377, 2009.

    ADS  Article  Google Scholar 

  20. 20.

    H. Aihara, C. A. Prieto, D. An et al., Astrophys. J. Suppl. Ser., 193, 29, 2011.

    ADS  Article  Google Scholar 

  21. 21.

    D. J. Eisenstein, D. H. Weinberg, E.Agol et al., Astron J., 142, 72, 2011.

    ADS  Article  Google Scholar 

  22. 22.

    D. Carollo, S. Martell, T. Beers et al., Astrophys. J., 769, 87, 2013.

    ADS  Article  Google Scholar 

  23. 23.

    W. H. Elsanhoury, M. A. Sharaf, M. I. Nouh et al., The Open Astron. J., 6, 1, 2013.

    ADS  Article  Google Scholar 

  24. 24.

    W. M. Smart, Combination of observations. London: Cambridge University Press 1958.

    Google Scholar 

  25. 25.

    M. Chiba and T. C. Beers, Astron. J., 119, 2843, 2000.

    ADS  Article  Google Scholar 

  26. 26.

    J. Binney and M. Merrifield, Galactic Astronomy/James Binney and Michael Merrifield (Princeton, NJ: Princeton Univ. Press), 1998.

  27. 27.

    J. H. Oort, Bull. Astron. Inst. Netherl., 3, 275, 1927.

    ADS  Google Scholar 

  28. 28.

    J. H. Oort, Bull. Astron. Inst. Netherl., 4, 91, 1927.

    ADS  Google Scholar 

  29. 29.

    L. A. Balona and M. W. Feast, Mon. Not. Roy. Astron. Soc., 167, 621, 1974.

    ADS  Article  Google Scholar 

  30. 30.

    M. W. Feast and M. Shuttleworth, Mon. Not. Roy. Astron. Soc., 130, 243, 1965.

    Article  Google Scholar 

  31. 31.

    D. Mihalas and J. Binney, Galactic Astronomy (San Francisco, CA: Freeman), 1981.

    Google Scholar 

  32. 32.

    Chengdong Li, Gang Zhao, and Chengqun Yang, Astrophys. J., 872, 205, 2019.

  33. 33.

    F. J. Kerr and D. Lynden-Bell, Mon. Not. Roy. Astron. Soc., 221, 1023, 1986.

    ADS  Article  Google Scholar 

  34. 34.

    F. Comeron, J. Torra, and A. E. Gomez, Astron. Astrophys., 286, 789, 1994.

  35. 35.

    M. Feast and P. Whitelock, Mon. Not. Roy. Astron. Soc., 291, 683, 1997.

    ADS  Article  Google Scholar 

  36. 36.

    R. P. Olling and W. Dehnen, Astrophys. J., 599, 275, 2003.

    ADS  Article  Google Scholar 

  37. 37.

    R. Branham, Mon. Not. Roy. Astron. Soc., 370, 1393, 2006.

    ADS  Article  Google Scholar 

  38. 38.

    R. Branham, Mon. Not. Roy. Astron. Soc., 409, 1269, 2010.

    ADS  Article  Google Scholar 

  39. 39.

    J. Bovy, Mon. Not. Roy. Astron. Soc., 468, L63, 2017.

    ADS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding authors

Correspondence to M. I. Nouh or W. H. Elsanhoury.

Additional information

Published in Astrofizika, Vol. 63, No. 2, pp. 207-216 (May 2020).

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Nouh, M.I., Elsanhoury, W.H. Kinematics and Velocity Ellipsoid of Halo Red Giants. Astrophysics 63, 179–189 (2020). https://doi.org/10.1007/s10511-020-09624-5

Download citation

Keywords

  • stellar halo: solar elements: kinematical analysis: Oort constants