An Intrinsic Relation Between A Function of The RightAscension and Declination With the Angular Distanceto The Vertex for Hyades Stars

ABSTRACT

In this paper, an intrinsic relation was developed for Hyades stars between a function of the right ascensions α and declination δ with the angular distance λ from the vertex. The precision criteria of this relation are very satisfactory and a correlation coefficient of value ≈ 1 was found which proves that the attributes are completely related linearly.

In this paper, an intrinsic relation was developed for Hyades stars between a function of the right ascensions α and declination δ with the angular distance λ from the vertex. The precision criteria of this relation are very satisfactory and a correlation coefficient of value ≈ 1 was found which proves that the attributes are completely related linearly.

Cite this paper

nullM. Sharaf and H. Selim, "An Intrinsic Relation Between A Function of The RightAscension and Declination With the Angular Distanceto The Vertex for Hyades Stars,"*International Journal of Astronomy and Astrophysics*, Vol. 1 No. 2, 2011, pp. 105-108. doi: 10.4236/ijaa.2011.12015.

nullM. Sharaf and H. Selim, "An Intrinsic Relation Between A Function of The RightAscension and Declination With the Angular Distanceto The Vertex for Hyades Stars,"

References

[1] M. Yildiz, K. Yakut, H. Bakis and A. Noels, “Modeling the Components of Binaries in the Hyades: The De- pendence of the Mixing-Length Parameter on Stellar Mass,” Monthly Notices of the Royal Astronomical Society, Vol. 368, No. 4, 2006, pp. 1941-1948. doi:10.1111/j.1365-2966.2006.10275.x

[2] P. A. Wayman, L. S. T. Symma and K. C. Blacwell, “Proper Motions and Radial Velocities of Hyades Stars,” Joint Publication of the Royal Greenwich Obser Vatory, 1965.

[3] R. B. Hanson, “A Study of the Motion, Membership, and Distance of the Hyades Cluster,” Astronomical Journal, Vol. 80, 1975, pp. 379-401. doi:10.1086/111753

[4] O. J. Eggen, “A Systematic Search for Members of the Hyades Supercluster. III. Near-Main-Sequence G and K Stars with Very Active Chromospheres,” Astronomical Journal, Vol. 89, 1984, pp. 1358-1365. doi:10.1086/111753

[5] J. E. Gunn, R. F. Griffin, R. E. M. Griffin and B. A. Zimmerman, “A Radial-Velocity Survey of the Hyades,” Astronomical Journal, Vol. 96, 1988, pp. 172-197. doi:10.1086/114800

[6] M. A. Sharaf, A. A. Bassuny and B. A. Korany, “An Error Controlled Method to Determine Parameteters of Moving Clusters with Application to Hyades,” Astrophy- sical Letter and Communications, Vol. 40, 2000, p. 39.

[7] J. H. J. de Bruije, R. Hoogerwerf and P. T. de Zeeuw, “A Hipparcos Study of the Hyades Open Cluster—Improved Colour-Absolute Magnitude and Hertzsprung-Russell Dia- grams,” Astronomy and Astrophysics, Vol. 367, 2001, pp. 111-147. doi:10.1051/0004-6361:20000410

[8] M. A. C. Perryman, A. G. A. Brown and Y. A. A. Lebreton, “The Hyades: Distance, Structure, Dynamics, Age,” Astronomy and Astrophysics, Vol. 331, 1998, pp. 81-120.

[9] S. Boudreault, C. A. L. Bailer-Jones, B. Goldman, T. Henning and J. A. Caballero, “Brown Dwarfs and Very Low Mass Stars in the Praesepe Open Cluster: A Dynamically Unevolved Mass Function?” Astronomy and Astrophysics, Vol. 510, 2010, Article ID A27. doi:10.1051/0004-6361/200913011

[10] H. Poehnl and E. Paunzen, “A Statistical Method to Determine Open Cluster Metallicities,” Astronomy and Astrophysics, Vol. 514, 2010, Article ID A81.

[11] H. Schwan, “The Distance and Main Sequence of the Hyades Cluster Based on 145 Stars with Highly Accurate Proper Motions Obtained from Work on the Catalogues FK 5 and PPM,” Astronomy and Astrophysics, Vol. 243, 1991, pp. 386-400.

[12] M. A. Sharaf, “Relation between the Apparent Magnitude and the Parallax for Hyades Stars,” New Astronomy, Vol. 8, No. 7, 2003, pp. 645-653. doi:10.1016/S1384-1076(03)00052-6

[13] Z. Kopal and M. A. Sharaf, “Linear Analysis of the Light Curves of Eclipsing Variables. I. Analysis of the Fractional Loss of Light,” Astrophysics and Space Science, Vol. 70, No. 1, 1980, pp. 77-101. doi:10.1007/BF00641665

[14] W. H. Press, S. A. Teukolsky, W. T. Vetterling and B. P. Flannery, “Numerical Recipes in Fortran,” Cambridge University Press, Cambridge, 1992.

[1] M. Yildiz, K. Yakut, H. Bakis and A. Noels, “Modeling the Components of Binaries in the Hyades: The De- pendence of the Mixing-Length Parameter on Stellar Mass,” Monthly Notices of the Royal Astronomical Society, Vol. 368, No. 4, 2006, pp. 1941-1948. doi:10.1111/j.1365-2966.2006.10275.x

[2] P. A. Wayman, L. S. T. Symma and K. C. Blacwell, “Proper Motions and Radial Velocities of Hyades Stars,” Joint Publication of the Royal Greenwich Obser Vatory, 1965.

[3] R. B. Hanson, “A Study of the Motion, Membership, and Distance of the Hyades Cluster,” Astronomical Journal, Vol. 80, 1975, pp. 379-401. doi:10.1086/111753

[4] O. J. Eggen, “A Systematic Search for Members of the Hyades Supercluster. III. Near-Main-Sequence G and K Stars with Very Active Chromospheres,” Astronomical Journal, Vol. 89, 1984, pp. 1358-1365. doi:10.1086/111753

[5] J. E. Gunn, R. F. Griffin, R. E. M. Griffin and B. A. Zimmerman, “A Radial-Velocity Survey of the Hyades,” Astronomical Journal, Vol. 96, 1988, pp. 172-197. doi:10.1086/114800

[6] M. A. Sharaf, A. A. Bassuny and B. A. Korany, “An Error Controlled Method to Determine Parameteters of Moving Clusters with Application to Hyades,” Astrophy- sical Letter and Communications, Vol. 40, 2000, p. 39.

[7] J. H. J. de Bruije, R. Hoogerwerf and P. T. de Zeeuw, “A Hipparcos Study of the Hyades Open Cluster—Improved Colour-Absolute Magnitude and Hertzsprung-Russell Dia- grams,” Astronomy and Astrophysics, Vol. 367, 2001, pp. 111-147. doi:10.1051/0004-6361:20000410

[8] M. A. C. Perryman, A. G. A. Brown and Y. A. A. Lebreton, “The Hyades: Distance, Structure, Dynamics, Age,” Astronomy and Astrophysics, Vol. 331, 1998, pp. 81-120.

[9] S. Boudreault, C. A. L. Bailer-Jones, B. Goldman, T. Henning and J. A. Caballero, “Brown Dwarfs and Very Low Mass Stars in the Praesepe Open Cluster: A Dynamically Unevolved Mass Function?” Astronomy and Astrophysics, Vol. 510, 2010, Article ID A27. doi:10.1051/0004-6361/200913011

[10] H. Poehnl and E. Paunzen, “A Statistical Method to Determine Open Cluster Metallicities,” Astronomy and Astrophysics, Vol. 514, 2010, Article ID A81.

[11] H. Schwan, “The Distance and Main Sequence of the Hyades Cluster Based on 145 Stars with Highly Accurate Proper Motions Obtained from Work on the Catalogues FK 5 and PPM,” Astronomy and Astrophysics, Vol. 243, 1991, pp. 386-400.

[12] M. A. Sharaf, “Relation between the Apparent Magnitude and the Parallax for Hyades Stars,” New Astronomy, Vol. 8, No. 7, 2003, pp. 645-653. doi:10.1016/S1384-1076(03)00052-6

[13] Z. Kopal and M. A. Sharaf, “Linear Analysis of the Light Curves of Eclipsing Variables. I. Analysis of the Fractional Loss of Light,” Astrophysics and Space Science, Vol. 70, No. 1, 1980, pp. 77-101. doi:10.1007/BF00641665

[14] W. H. Press, S. A. Teukolsky, W. T. Vetterling and B. P. Flannery, “Numerical Recipes in Fortran,” Cambridge University Press, Cambridge, 1992.