Studying the kinematics of the giant star-forming region 30 Doradus. I. The data

Abstract

We present high-quality VLT-FLAMES optical spectroscopy of the nebular gas in the giant star-forming region 30 Doradus. In this paper, the first of a series, we introduce our observations and discuss the main kinematic features of 30 Dor, as revealed by the spectroscopy of the ionized gas in the region. The primary data set consists of regular grid of nebular observations, which we used to produce a spectroscopic datacube of 30 Dor, centered on the massive star cluster R136 and covering a field-of-view of 10'x10'. The main emission lines present in the datacube are from Halpha and [NII]6548,6584. The Halpha emission-line profile varies across the region from simple single-peaked emission to complex, multiple-component profiles, suggesting that different physical mechanisms are acting on the excited gas. To analyse the gas kinematics we fit Gaussian profiles to the observed Halpha features. Unexpectedly, the narrowest Halpha profile in our sample lies close to the supernova remnant 30 Dor B. We present maps of the velocity field and velocity dispersion across 30 Dor, finding five previously unclassified expanding structures. These maps highlight the kinematic richness of 30 Dor (e.g. supersonic motions), which will be analysed in future papers.

24 pages, 12 figures. Accepted for publication in Astronomy and Astrophysics

References in corpus (4)

• The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit
• The VLT-FLAMES Tarantula Survey VIII. Multiplicity properties of the O-type star population
• The VLT-FLAMES Tarantula Survey I: Introduction and observational overview
• Structure and Feedback in 30 Doradus II. Structure and Chemical Abundances

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• Mapping the core of the Tarantula Nebula with VLT-MUSE: I. Spectral and nebular content around R136
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• The 300 pc resolution imaging of a z = 8.31 galaxy: Turbulent ionized gas and potential stellar feedback 600 million years after the Big Bang
• Internal kinematics of giant H II regions in M101 with the Keck Cosmic Web Imager
• Supersonic turbulence in Giant HII Regions: clues from 30 Doradus
• First results from SAM-FP: Fabry-Perot observations with ground-layer adaptive optics - the structure and kinematics of the core of 30 Doradus
• VLT/X-shooter spectroscopy of massive young stellar objects in the 30 Doradus region of the Large Magellanic Cloud
• Turbulence in compact to giant H II regions
• Discovery of a New Population of Galactic HII Regions with Ionized Gas Velocity Gradients
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