Resolving the Structure and Kinematics of the Youngest HII Regions and Radio Jets from Young Stellar Objects
arXiv:1806.10225
Abstract
In this contribution we explore the new science that a Next Generation Very Large Array (ngVLA) would be able to perform on the topics of the youngest HII regions and (proto)stellar jets. Free-free continuum and radio recombination line (RRL) emission are often the only way of peering into the dense envelopes surrounding (proto)stars of all masses, and trace their initial feedback in the form of `radio jets', `hypercompact HII regions', or photoevaporating, partially-ionized flows. Properly disentangling free-free from dust emission is also mandatory in studies of protoplanetary and accretion disks. Current VLA research has reached an impasse in which a population of faint ionized radio sources, probably corresponding to the above mentioned objects, is detected, but their nature is mostly unknown. The ngVLA would allow us to resolve the density structure and kinematics of such sources, revolutionizing our knowledge of star formation across the entire stellar-mass spectrum.
arXiv commentAn ngVLA Science Book chapter. v2 includes a few modifications in references
References in corpus (4)
- The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). IV. Free-Free Emission from Protostars: Links to Infrared Properties, Outflow Tracers, and Protostellar Disk Masses
- Next Generation Very Large Array Memo No. 5: Science Working Groups -- Project Overview
- Next Generation Very Large Array Memo No. 6, Science Working Group 1: The Cradle of Life
- Magnetic fields in forming stars with the ngVLA