CYGOB1                 package:HSAUR                 R Documentation

_C_Y_G _O_B_1 _S_t_a_r _C_l_u_s_t_e_r _D_a_t_a

_D_e_s_c_r_i_p_t_i_o_n:

     Energy output and surface termperature for Star Cluster CYG OB1.

_U_s_a_g_e:

     data("CYGOB1")

_F_o_r_m_a_t:

     A data frame with 47 observations on the following 2 variables.

     '_l_o_g_s_t' log survface termperature of the star.

     '_l_o_g_l_i' log light intensity of the star.

_D_e_t_a_i_l_s:

     The Hertzsprung-Russell (H-R) diagram forms the basis of the
     theory of stellar evolution. The diagram is essentially a  plot of
     the energy output of stars plotted against their surface
     temperature. Data from the H-R diagram of Star Cluster CYG OB1, 
     calibrated according to VanismaGreve1972 are given here.

_S_o_u_r_c_e:

     F. Vanisma and J. P. De Greve (1972), Close binary systems  before
     and after mass transfer. _Astrophysics and Space Science_, *87*,
     377-401.

     D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway and E. Ostrowski
     (1994). _A Handbook of Small Datasets_, Chapman and Hall/CRC,
     London.

_E_x_a_m_p_l_e_s:

       data("CYGOB1", package = "HSAUR")
       plot(logst ~ logli, data = CYGOB1)

