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J141627.7+231525.9

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=0.1382 system is located at 14:16:27.7 +23:15:25.9. The CMD shows an obvious RS, which all spectroscopic members lie on, and the magnitude gap is 2.9 based on SDSS photometric data. The rejected galaxy is ~10500 km s^-1 away from the FG. The X-ray temperature of the system is T_X=3.7 keV and the X-ray emission peak lies ~13.9 kpc from the FG. The X-ray source is extended with R₂₀₀=1.25 Mpc or ~25R₉₀. The system has a velocity dispersion of 646 km s^-1 based on 21 galaxies. This system was an XMM target and was classified as an FS in Jones et al. (2003) and subsequently studied in Voevodkin et al. (2010), Cypriano et al. (2006), and Khosroshahi et al. (2006a,b). It is also known as ZwCl 1413.9+2330. From the literature: Δm₁₂=2.4, L_X=2.2×10⁴⁴ erg s^-1, and T_X=1.53±0.35 keV (Jones et al. 2003); L_X=1.11×10⁴⁴ erg s^-1 (Cypriano et al. 2006); T_X~4 keV, σ;~700 km s^-1 (Khosroshahi 2006a); and Δm₁₂=1.7, L_X=6.09×10⁴³ erg s^-1, R₅₀₀=0.89 Mpc and σ;=652 km s^-1 (Voevodkin 2010). This system appears to be associated with XMMXCS J141657.5+231239.2.

Fossil System

Fossil Galaxy