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Post Info TOPIC: NGC 5278/79


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RE: NGC 5278/79
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Title: The interacting galaxy pair KPG 390: H \alpha kinematics
Authors: P. Repetto, M. Rosado, R. Gabbasov, I. Fuentes-Carrera
(Version v2)

In this work we present scanning Fabry-Perot H \alpha observations of the isolated interacting galaxy pair NGC 5278/79 obtained with the PUMA Fabry-Perot 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 a disk+halo components. We test three different types of halo (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 pseudo-isothermal profile is about ten times smaller than, that for the other two halo distributions. Finally, our kinematical results together with the analysis of dust lanes 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.

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L

Posts: 131433
Date:
Permalink  
 

Title: H\alpha kinematics of KPG 390
Authors: P. Repetto, M. Rosado, R. Gabbasov I. Fuentes-Carrera

In this work we present scanning Fabry-Perot H\alpha observations of the isolated interacting galaxy pair NGC 5278/79 obtained with the PUMA Fabry-Perot interferometer. We derived velocity fields, various kinematic parameters and rotation curves for both galaxies. Our kinematical results together with the fact that dust lanes have been detected in both galaxies, as well as the analysis of surface brightness profiles along the minor axis, allowed us to determine that both components of the interacting pair are trailing spirals.

Read more (395kb, PDF)

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