J131145.1+220206.0
Link
to XCS-DR1 entry
 |  |
| Fig. 1: The SDSS optical image with the XCS X-ray contours overlaid. | Fig. 2: The colour-magnitude diagram used to determine the magnitude gap. Green triangles are spectroscopic cluster members and circles are photometric cluster members. Red triangles are spectroscopic non-members. Only cluster members within ±0.2 mag of the r-i colour of the fossil galaxy (dotted lines) are used to calculate the gap. The two diamonds denote the second and the fourth brightest galaxy. |
Notes
This z=0.1715 system is located at
13:11:45.1 +22:02:06.0. The CMD shows an obvious RS, which all
spectroscopic members lie on, and the magnitude gap is 2.7 based on
SDSS photometric data. The rejected galaxy is ~50000$ km
s-1 away from the FG. The X-ray temperature of the system
is TX=3.4 keV and the X-ray emission peak lies ~95.3
kpc from the FG. The X-ray source is extended with
R200=1.16 Mpc or ~25R90. The system has a
velocity dispersion of 362 km s-1 based on 10
galaxies. This system is also known as MaxBCG J197.94248+22.02702.
Fossil System
| XCS ID | Δm14 | R200 | LX | TX | Ltot | ΣL24 |
|---|
| XMMXCS J131145.1+220206.0 | 2.7 | 1.16 | 1.57 | 3.4 | 10.97 | 1.39 |
Fossil Galaxy
| SDSS ID | z | M∗ | Age | Z | log(SSFR) | Lgal |
|---|
| J131146.19+220137.2 | 0.1715 | 0.97 | 9.5 | 0.027 | -12.13 | 4.36 |