Ionized Gas Kinematics at High Resolution V: [NeII], Multiple Clusters, High Efficiency Star Formation and Blue Flows in He 2-10

Abstract

We measured the $12.8\mu$m [NeII] line in the dwarf starburst galaxy He 2-10 with the high-resolution spectrometer TeXeS on the NASA IRTF. The data cube has diffraction-limited spatial resolution $\sim 1^{\prime \prime }$ and total velocity resolution including thermal broadening of $\sim 5$km/s. This makes it possible to compare the kinematics of individual star-forming clumps and molecular clouds in the three dimensions of space and velocity, and allows us to determine star formation efficiencies. The kinematics of the ionized gas confirm that the starburst contains multiple dense clusters. From the $M/R$ of the clusters and the $\simeq 30-40$% star formation efficiencies the clusters are likely to be bound and long lived, like globulars. Non-gravitational features in the line profiles show how the ionized gas flows through the ambient molecular material, as well as a narrow velocity feature which we identify with the interface of the HII region and a cold dense clump. These data offer an unprecedented view of the interaction of embedded HII regions with their environment.

accepted to ApJ

References in corpus (6)

• An actively accreting massive black hole in the dwarf starburst galaxy Henize 2-10
• MUSCLE W49 : A Multi-Scale Continuum and Line Exploration of the Most Luminous Star Formation Region in the Milky Way. I. Data and The Mass Structure of the Giant Molecular Cloud
• When efficient star formation drives cluster formation
• Brackett Lines from the Super Star Cluster Nebulae in He 2-10
• Ionized Gas Kinematics at High Resolution IV: Star Formation and a Rotating Core in the Medusa (NGC 4194)
• Molecules, dust, and protostars in NGC 3503

Cited by in corpus (4)

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• Dense Molecular Filaments Feeding a Starburst: ALMA Maps of CO(3-2) in Henize 2-10
• Ionized Gas in the NGC 5253 Supernebula:High Spatial and Spectral Resolution Observations with the JVLA and TEXES
• Observing the influence of the youngest super star clusters in NGC 1569: Keck Brackett $\alpha$ spectroscopy