The interacting galaxy pair KPG 390: Hα Kinematics

P. Repetto, M. Rosado, R. Gabbasov, I. Fuentes-Carrera

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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. © 2010. The American Astronomical Society.
Original languageAmerican English
Pages (from-to)1600-1613
Number of pages14
JournalAstronomical Journal
DOIs
StatePublished - 19 Mar 2010

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interacting galaxies
halos
kinematics
curves
profiles
Fabry-Perot interferometers
interferometer
dark matter
brightness
velocity distribution
dust
galaxies
scanning
distribution

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Repetto, P. ; Rosado, M. ; Gabbasov, R. ; Fuentes-Carrera, I. / The interacting galaxy pair KPG 390: Hα Kinematics. In: Astronomical Journal. 2010 ; pp. 1600-1613.
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The interacting galaxy pair KPG 390: Hα Kinematics. / Repetto, P.; Rosado, M.; Gabbasov, R.; Fuentes-Carrera, I.

In: Astronomical Journal, 19.03.2010, p. 1600-1613.

Research output: Contribution to journalArticle

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T1 - The interacting galaxy pair KPG 390: Hα Kinematics

AU - Repetto, P.

AU - Rosado, M.

AU - Gabbasov, R.

AU - Fuentes-Carrera, I.

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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. © 2010. The American Astronomical Society.

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