[S IV] in the NGC 5253 Supernebula: Ionized Gas Kinematics at High Resolution

Abstract

The nearby dwarf starburst galaxy NGC 5253 hosts a deeply embedded radio-infrared supernebula excited by thousands of O stars. We have observed this source in the 10.5μm line of S+3 at 3.8 kms-1 spectral and 1.4" spatial resolution, using the high resolution spectrometer TEXES on the IRTF. The line profile cannot be fit well by a single Gaussian. The best simple fit describes the gas with two Gaussians, one near the galactic velocity with FWHM 33.6 km s-1 and another of similiar strength and FWHM 94 km s-1 centered \sim20 km s-1 to the blue. This suggests a model for the supernebula in which gas flows towards us out of the molecular cloud, as in a "blister" or "champagne flow" or in the HII regions modelled by Zhu (2006).

Accepted for publication in the Astrophysical Journal 4 June 2012

References in corpus (7)

• The localized chemical pollution in NGC 5253 revisited: Results from deep echelle spectrophotometry
• Feedback in the Antennae Galaxies (NGC 4038/9): I. High-Resolution Infrared Spectroscopy of Winds from Super Star Clusters
• Inflows and Outflows in the Dwarf Starburst Galaxy NGC 5253: High-Resolution HI Observations
• [Ne II] Observations of Gas Motions in Compact and Ultracompact H II Regions
• Brackett Lines from the Super Star Cluster Nebulae in He 2-10
• VLA H53alpha observations of the central region of the Super Star Cluster Galaxy NGC 5253
• Recombination Lines of Embedded Star Clusters

Cited by in corpus (12)

• Highly efficient star formation in NGC 5253 possibly from stream-fed accretion
• ALMA Detects CO(3-2) within a Super Star Cluster in NGC5253
• Piecing together the puzzle of NGC 5253: abundances, kinematics and WR stars
• The formation of secondary stellar generations in massive young star clusters from rapidly cooling shocked stellar winds
• Gas expulsion vs gas retention in young stellar clusters II: effects of cooling and mass segregation
• HeI in the central Giant HII Region of NGC 5253. A 2D observational approach to collisional and radiative transfer effects
• Ionized Gas Motions and the Structure of Feedback Near a Forming Globular Cluster in NGC 5253
• The Youngest Globular Clusters
• Ionized Gas Kinematics at High Resolution. II: Discovery of a Double Infrared Cluster in II Zw 40
• Ionized Gas Kinematics at High Resolution V: [NeII], Multiple Clusters, High Efficiency Star Formation and Blue Flows in He 2-10
• Ionized Gas Kinematics at High Resolution IV: Star Formation and a Rotating Core in the Medusa (NGC 4194)
• Ionized Gas in the NGC 5253 Supernebula:High Spatial and Spectral Resolution Observations with the JVLA and TEXES