Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Physical Parameters of Late Type Spiral Galaxies - III. Mass and Mass to Luminosity Ratio of NGC 7793
oleh: Chang-Ha Kim, Mun-Suk Chun
| Format: | Article |
|---|---|
| Diterbitkan: | The Korean Space Science Society 1986-12-01 |
Deskripsi
The mass distribution and other related quantities were calculated by fitting the observed rotation curve(Davoust and de Vaucouleur 1980) to Brandt and Belton's mass distribution model. One of n values for mass model is determined as 1.5(Vm = 95 km/s) and two pairs of them are determined as 0.8(Vm = 95 km/s) and 2.0 and 0.8(Vm = 55 km/s) and 2.0 because f the hump in observed rotation curve. Total masses and integrated mass to luminosity ratios are 1.8 x 10^10*Msolar, 1.5 x 10^10*Msolar, 1.4 x 10^10*Msolar, and 6.57, 5.33, 5.26 for three cases according to n values. Integrated mass to luminosity ratio in Holmberg radius is 3.44, 3.26, 3.00 in good agreement with the typical value of Sd type suggested by Faber and Gallagher(1979). Presented halo masses which are fifty percent of total masses and halo mass to luminosity ratios given as 75.83, 53.50, 58.75 are values less than Turner's(1976).