TY - JOUR

T1 - Spectroscopic study of the peculiar galaxy UGC 5119

AU - Merkulova, O.A.

AU - Shalyapina, L.V.

AU - Yakovleva, V.A.

AU - Karataeva, G.M.

PY - 2008

Y1 - 2008

N2 - We present the results of our study of the stellar kinematics in the elliptical galaxy UGC 5119, which has previously been suspected to be a polar-ring galaxy. We have detected a rapidly rotating disk in the central region ( r ≤ 3.2 kpc) of the galaxy’s main body and found a radial velocity gradient along its minor axis (in the putative ring). We conclude that UGC 5119 is a medium-luminosity elliptical galaxy with a rapidly rotating disk component and a stellar (probably polar) ring. We have calculated the Lick indices of the H β, Mgg b, Fe 5270, and Fe 5335 absorption lines and compared them with evolutionary synthesis models. Differences in the [Mg/Fe] ratios, metallicities, and ages of the stars have been found: the young stellar population with a solar [Mg/Fe] ratio and a high metallicity dominates in the circumnuclear region ( r ≤ 1 kpc), while the old one with a low metal abundance dominates in the ring.

AB - We present the results of our study of the stellar kinematics in the elliptical galaxy UGC 5119, which has previously been suspected to be a polar-ring galaxy. We have detected a rapidly rotating disk in the central region ( r ≤ 3.2 kpc) of the galaxy’s main body and found a radial velocity gradient along its minor axis (in the putative ring). We conclude that UGC 5119 is a medium-luminosity elliptical galaxy with a rapidly rotating disk component and a stellar (probably polar) ring. We have calculated the Lick indices of the H β, Mgg b, Fe 5270, and Fe 5335 absorption lines and compared them with evolutionary synthesis models. Differences in the [Mg/Fe] ratios, metallicities, and ages of the stars have been found: the young stellar population with a solar [Mg/Fe] ratio and a high metallicity dominates in the circumnuclear region ( r ≤ 1 kpc), while the old one with a low metal abundance dominates in the ring.

U2 - 10.1134/S1063773708080057

DO - 10.1134/S1063773708080057

M3 - Article

VL - 34

SP - 542

EP - 550

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 8

ER -