Using archival Chandra observations with a total effective exposure of 734 ks , we derive an updated catalog of point sources in the massive globular cluster Terzan 5 .
Our catalog covers an area of 58.1 arcmin ^ { 2 } ( R \leq 4.3 arcmin ) with 489 X-ray sources , and more than 75 \% of these sources are first detected in this cluster .
We find significant dips in the radial distribution profiles of X-ray sources in Terzan 5 , with the projected distance and width of the distribution dips for bright ( L _ { X } \gtrsim 9.5 \times 10 ^ { 30 } { erg s ^ { -1 } } ) X-ray sources are larger than that of the faint ( L _ { X } \lesssim 9.5 \times 10 ^ { 30 } { erg s ^ { -1 } } ) sources .
By fitting the radial distribution of the X-ray sources with a “ generalized King model ” , we estimated an average mass of 1.48 \pm 0.11 M _ { \odot } and 1.27 \pm 0.13 M _ { \odot } for the bright and faint X-ray sources , respectively .
These results are in agreement with that observed in 47 Tuc , which may suggest a universal mass segregation effect for X-ray sources in GCs .
Compared with 47 Tuc , we show that the two-body relaxation timescale of Terzan 5 is much smaller , but its dynamical age is significantly younger than 47 Tuc .
These features suggest that the evolution of Terzan 5 is not purely driven by two-body relaxation , and tidal stripping effect also plays an important role in accelerating the dynamical evolution of this cluster .