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The elliptical galaxy NGC 720: An unequal-mass galaxy merger remnant
2005
Astronomy and Astrophysics
The stellar population of the central region of the galaxy NGC 720 has been investigated through longslit optical spectroscopy. The velocity dispersion and 13 Lick indices were obtained as a function of the radius along the semimajor axis of the galaxy. The Mg 2 index presents a gradient of d Mg 2 / d log r = −0.079 which behaves similarly to the Fe lines, indicating no enhancement of Mg 2 in relation to Fe . The stellar population ages and metallicities were derived by a population
doi:10.1051/0004-6361:20042464
fatcat:apkoovwvsfhpjktbt6jfzorskq