# X Marks the Spot: Nexus of Filaments, Cores, and Outflows in a Young   Star-Forming Region

**Authors:** Nia Imara, Charles Lada, John Lewis, John H. Bieging, Shuo Kong, Marco, Lombardi, and Joao Alves

arXiv: 1704.08691 · 2017-05-24

## TL;DR

This study investigates the structure and dynamics of filaments, cores, and outflows in a relatively pristine, low-star-formation region of a giant molecular cloud using multiwavelength observations, revealing insights into early star formation processes.

## Contribution

It provides new observational evidence on filament stability, core properties, and outflow characteristics in a minimally active star-forming environment, enhancing understanding of initial star formation conditions.

## Key findings

- Filaments have coherent velocity gradients and may be gravitationally unstable.
- Presence of a starless, prestellar core suggests early star formation stages.
- Detected molecular outflow is weak and not driving turbulence or collapse.

## Abstract

We present a multiwavelength investigation of a region of a nearby giant molecular cloud that is distinguished by a minimal level of star formation activity. With our new 12CO(J=2-1) and 13CO(J=2-1) observations of a remote region within the middle of the California molecular cloud, we aim to investigate the relationship between filaments, cores, and a molecular outflow in a relatively pristine environment. An extinction map of the region from Herschel Space Observatory observations reveals the presence of two 2-pc-long filaments radiating from a high-extinction clump. Using the 13CO observations, we show that the filaments have coherent velocity gradients and that their mass-per-unit-lengths may exceed the critical value above which filaments are gravitationally unstable. The region exhibits structure with eight cores, at least one of which is a starless, prestellar core. We identify a low-velocity, low-mass molecular outflow that may be driven by a flat spectrum protostar. The outflow does not appear to be responsible for driving the turbulence in the core with which it is associated, nor does it provide significant support against gravitational collapse.

## Full text

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## Figures

19 figures with captions in the complete paper: https://tomesphere.com/paper/1704.08691/full.md

## References

53 references — full list in the complete paper: https://tomesphere.com/paper/1704.08691/full.md

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Source: https://tomesphere.com/paper/1704.08691