TY - JOUR
T1 - The interacting galaxy pair KPG 390
T2 - Hα Kinematics
AU - Repetto, P.
AU - Rosado, M.
AU - Gabbasov, R.
AU - Fuentes-Carrera, I.
PY - 2010
Y1 - 2010
N2 - In this work, we present scanning Fabry-Perot (FP) Hα observations of the isolated interacting galaxy pair NGC 5278/79 obtained with the PUMA FP interferometer. We derived velocity fields and rotation curves for both galaxies. For NGC 5278 we also obtained the residual velocity map to investigate the non-circular motions, and estimated its mass by fitting the rotation curve with disk+halo components. We test three different types of halos (pseudo-isothermal, Hernquist, and Navarro-Frenk-White) and obtain satisfactory fits to the rotation curve for all profiles. The amount of dark matter required by the pseudo-isothermal profile is about 10 times smaller than that for the other two halo distributions. Finally, our kinematical results together with the analysis of dust lane distribution and of surface brightness profiles along the minor axis allowed us to determine univocally that both components of the interacting pair are trailing spirals.
AB - In this work, we present scanning Fabry-Perot (FP) Hα observations of the isolated interacting galaxy pair NGC 5278/79 obtained with the PUMA FP interferometer. We derived velocity fields and rotation curves for both galaxies. For NGC 5278 we also obtained the residual velocity map to investigate the non-circular motions, and estimated its mass by fitting the rotation curve with disk+halo components. We test three different types of halos (pseudo-isothermal, Hernquist, and Navarro-Frenk-White) and obtain satisfactory fits to the rotation curve for all profiles. The amount of dark matter required by the pseudo-isothermal profile is about 10 times smaller than that for the other two halo distributions. Finally, our kinematical results together with the analysis of dust lane distribution and of surface brightness profiles along the minor axis allowed us to determine univocally that both components of the interacting pair are trailing spirals.
KW - Galaxies: individual (NGC 5278, NGC 5279)
KW - Galaxies: interactions
KW - Methods: data analysis
KW - Techniques: interferometric
KW - Techniques: radial velocities
UR - http://www.scopus.com/inward/record.url?scp=77949344504&partnerID=8YFLogxK
U2 - 10.1088/0004-6256/139/4/1600
DO - 10.1088/0004-6256/139/4/1600
M3 - Artículo
SN - 0004-6256
VL - 139
SP - 1600
EP - 1613
JO - Astronomical Journal
JF - Astronomical Journal
IS - 4
ER -