SIMBAD references

2020ApJS..248...15Z - Astrophys. J., Suppl. Ser., 248, 15-15 (2020/May-0)

Searching for molecular outflows with support vector machines: the dark cloud complex in Cygnus.

ZHANG S., YANG J., XU Y., CHEN X., SU Y., SUN Y., ZHOU X., LI Y. and LU D.

Abstract (from CDS):

We present a survey of molecular outflows across the dark cloud complex in the Cygnus region, based on a 46.75 deg2 field of CO isotopologue data from the Milky Way Imaging Scroll Painting survey. A supervised machine-learning algorithm, the support vector machine, is introduced to accelerate our visual assessment of outflow features in the data cube of 12CO and 13CO J = 1-0 emission. A total of 130 outflow candidates are identified, 77 of which show bipolar structures and 118 are new detections. Spatially, these outflows are located inside dense molecular clouds, and some of them are found in clusters or in elongated linear structures tracing the underlying gas filament morphology. Along the line of sight, 97, 31, and 2 candidates reside in the Local, Perseus, and Outer Arms, respectively. Young stellar objects as outflow drivers are found near most outflows, while 36 candidates show no associated source. The clusters of outflows that we detect are inhomogeneous in their properties; nevertheless, we show that the outflows cannot inject turbulent energy on cloud scales. Instead, at best, they are restricted to affecting the so-called "clump" and "core" scales, and only on short (∼0.3 Myr) estimated timescales. Combined with outflow samples in the literature, our work shows a tight outflow mass-size correlation.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar jets - Astronomical object identification - Molecular clouds

VizieR on-line data: <Available at CDS (J/ApJS/248/15): table1.dat table2.dat>

Nomenclature: Tables 1-2: DMOC-NNNN (Nos 0001-0130).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD; there are some issues with cross-identifications or classifications.

CDS comments: Pelican's Hat, Head and Neck are not in SIMBAD.

Simbad objects: 87

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