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| Query : 2010ApJ...721L..14B |
2010ApJ...721L..14B - Astrophys. J., 721, L14-L18 (2010/September-3)
The faint end of the galaxy luminosity function in A1689: a steep red faint end upturn at z = 0.18.
BANADOS E., HUNG L.-W., DE PROPRIS R. and WEST M.J.
Abstract (from CDS):
We present a deep and wide I luminosity function (LF) for galaxies in A1689 (z = 0.183) from a mosaic of Hubble Space Telescope WFPC2 images covering 10' on the side. The main result of this work is the detection of a steep upturn in the dwarf galaxy LF, with α ∼ -2. The dwarf-to-giant ratio appears to increase outward, but this is because giant galaxies are missing in the cluster outskirts, indicating luminosity segregation. The red sequence LF has the same parameters, within errors, as the total LF, showing that the faint end upturn consists of red quiescent galaxies. We speculate that the upturn is connected to the "filling-in" of the red sequence at z < 0.4 and may represent the latest installment of "downsizing" as the least massive galaxies are being quenched at the present epoch.
Abstract Copyright: ∼
Journal keyword(s): galaxies: clusters: individual: A1689 - galaxies: dwarf - galaxies: luminosity function, mass function
Simbad objects: 8
| Number of rows : 8 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NAME COSMOS Field | reg | 10 00 28.60 | +02 12 21.0 | ~ | 3639 | 0 | |||||
| 2 | ACO 963 | ClG | 10 17 03.4 | +39 02 56 | ~ | 414 | 0 | |||||
| 3 | NAME Virgo Cluster | ClG | 12 30 47.8 | +12 23 07 | ~ | 7107 | 0 | |||||
| 4 | NAME Hubble Deep Field | reg | 12 36 49.5 | +62 12 58 | ~ | 1967 | 1 | |||||
| 5 | ACO 1656 | ClG | 12 59 44.40 | +27 54 44.9 | ~ | 5141 | 2 | |||||
| 6 | ACO 1689 | ClG | 13 11 29.5 | -01 20 28 | ~ | 1178 | 0 | |||||
| 7 | NAME Extended Groth Strip | reg | 14 19 | +52.8 | ~ | 1023 | 0 | |||||
| 8 | ACO 2218 | ClG | 16 35 54.0 | +66 13 00 | ~ | 827 | 1 |
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