Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2012-04-09
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
21 pages, 11 figures and 4 tables. Accepted for publication in RAA
Scientific paper
This paper presents multicolor optical photometry of the nearby galaxy cluster Abell 119 (z = 0:0442) with the Beijing-Arizona-Taiwan-Connecticut (BATC) system of 15 intermediate bands. Within the BATC viewing field of 58'* 58', there are 368 galaxies with known spectroscopic redshifts, including 238 member galaxies (called sample I). Based on the spectral energy distributions (SEDs) of 1376 galaxies brighter than iBATC = 19:5, photometric redshift technique and the color-magnitude relation of earlytype galaxies are applied to select faint member galaxies. As a result, 117 faint galaxies were selected as new member galaxies. Combined with sample I, an enlarged sample (called sample II) of 355 member galaxies is obtained. Spatial distribution and localized velocity structure for two samples demonstrate that A119 is a dynamically complex cluster with at least three prominent substructures in the central region within 1 Mpc. A large velocity dispersion for the central clump indicates a merging along the line of sight. No significant evidences for morphology and luminosity segregations are found in both samples. With the evolutionary synthesis model PEGASE, environmental effect on the star formation properties is confirmed. Faint galaxies in low-density region tend to have longer time scales of star formation, smaller mean stellar ages, and lower metallicities of interstellar medium, which is in agreement with the context of hierarchical cosmological scenario.
Fan Zhanyou
Jiang Zhao-Ji
Ma Jun
Tian Jin-tao
Wu Jiang-Hua
No associations
LandOfFree
Multicolor Photometry of the Nearby Galaxy Cluster A119 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 Multicolor Photometry of the Nearby Galaxy Cluster A119, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multicolor Photometry of the Nearby Galaxy Cluster A119 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-648630