H$\alpha$ Kinematics of Superbubbles and Supernova Remnants of the Dwarf galaxy NGC 4214

Abstract

We analysed the ionised gas kinematics of the dwarf galaxy NGC 4214 using high resolution Fabry-Perot interferometry observations and present a set of narrowband images in the H$\alpha$, [SII] $\lambda$6717 $\mathring{A}$, [NII] $\lambda$6584 $\mathring{A}$ and [OIII] $\lambda$5007 $\mathring{A}$ emission lines. The high-resolution Fabry-Perot observations of the H$\alpha$ emission line, allowed us to derive the velocity field, the velocity dispersion $\sigma$, and the rotation curve of the galaxy. We also present for the first time, three-dimensional kinematic maps of the complexes NGC 4214-I and NGC 4214-II and analysed the kinematics of the ionised gas of two new superbubbles, as well as the supernova remnants previously detected in this galaxy by other authors, in radio, optical and X-ray emission. We computed the expansion velocities of the superbubbles and supernova remnants fitting their velocity profiles and obtained their respective physical parameters. We found that the superbubbles have an expansion velocity of ~50 km s${}^{-1}$, dynamical age about $\sim$2 Myr and wind luminosity L${}_W$ of ~9X10${}^{38}$ erg s${}^{-1}$ produced probably by massive stars in OB associations. For supernova remnants, their expansion velocities are between $\sim$48 to $\sim$80 km s${}^{-1}$ with ages of about 10${}^4$ years and kinetic energy of about 10${}^{51}$ erg assuming they are in the radiative phase of evolution.

17 pages, 11 figures, accepted in MNRAS

References in corpus (12)

• The rotation curves shapes of late-type dwarf galaxies
• GHASP : An Halpha kinematic survey of 203 spiral and irregular galaxies - VII. Revisiting the analysis of Halpha data cubes for 97 galaxies
• Supergiant Shells and Molecular Cloud Formation in the LMC
• What controls the ionized gas turbulent motions in dwarf galaxies?
• Shaken, not blown: the gentle baryonic feedback of nearby starburst dwarf galaxies
• The young stellar population of NGC 4214 as observed with HST. II. Results
• Mapping the Escape Fraction of Ionizing Photons Using Resolved Stars: A Much Higher Escape Fraction for NGC 4214
• A Search for Radio Supernova Remnants in Four Irregular Galaxies
• Disentangling the ISM phases of the dwarf galaxy NGC 4214 using [CII] SOFIA/GREAT observations
• Star formation in the nearby dwarf galaxy DDO 53: interplay between gas accretion and stellar feedback
• Diffuse X-ray emission from the superbubbles N 70 and N 185 in the Large Magellanic Cloud
• A Kinematical Study of the Dwarf Irregular Galaxy NGC 1569 and its Supernova Remnants

Cited by in corpus (1)

• SISSI: Supernovae in a stratified, shearing interstellar medium -- I. The geometry of supernova remnants