Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-27
Astron.J.132:514-520,2006
Astronomy and Astrophysics
Astrophysics
Accepted by AJ - 14 pages, 6 figures
Scientific paper
10.1086/505044
We study the properties of the fossil cluster RX J1416.4+2315 through g' and i'-band imaging and spectroscopy of 25 member galaxies. The system is at a mean redshift of 0.137 and has a velocity dispersion of 584 km s^-1. Superimposed onto one quadrant of the cluster field there is a group of five galaxies at a mean redshift of 0.131, which, if included as part of the cluster, increases the velocity dispersion to 846 km/s. The central object of RX J1416.4+2315 is a normal elliptical galaxy, with no cD envelope. The luminosity function of the system, estimated by the number counts, and statistical background correction, in the range -22.6< M_g'< -16.6, is well fitted by a Schechter function with M_g'^* = -21.2 +/- 0.8 and alpha = -1.2 +/- 0.2 (H_0 = 70 km s^-1 Mpc^-1, Omega_M=0.3, Omega_Lambda=0.7). The luminosity function obtained from the spectroscopically confirmed members in both g' and i' bands agrees with the photometric results. The mass of the system, M 0.9 \times 10^14 h^-1_70 M_sun, its M/L of 445 h_70 M_sun/L_B_sun and L_X of 11 10^43 h^-2_70 ergs s^-1 (bolometric) suggest that this system is the second example of known fossil cluster, after RX J1552.2+2013, confirmed in the literature.
Laerte Sodré Jr.
Cypriano Eduardo S.
de Oliveira Claudia L. Mendes
No associations
LandOfFree
Velocity dispersion, mass and the luminosity function of the fossil cluster RX J1416.4+2315 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Velocity dispersion, mass and the luminosity function of the fossil cluster RX J1416.4+2315, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Velocity dispersion, mass and the luminosity function of the fossil cluster RX J1416.4+2315 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-413044