Velocity dispersion, mass and the luminosity function of the fossil cluster RX J1416.4+2315

Simple item page
dc.creatorCypriano, Eduardo S.
dc.creatorde Oliveira, Claudia L. Mendes
dc.creatorSodré Jr, Laerte
dc.date2006-03-27
dc.date2006-04-10
dc.date.accessioned2026-07-07T11:25:25Z
dc.date.available2026-07-07T11:25:25Z
dc.descriptionWe 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.
dc.descriptionAccepted by AJ - 14 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0603732
dc.identifierhttp://arxiv.org/abs/astro-ph/0603732
dc.identifierAstron.J.132:514-520,2006
dc.identifierdoi:10.1086/505044
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195503
dc.subjectAstrophysics
dc.titleVelocity dispersion, mass and the luminosity function of the fossil cluster RX J1416.4+2315
dc.typetext

Files

Collections

arXiv