SIMBAD references

2021ApJ...906...23F - Astrophys. J., 906, 23-23 (2021/January-1)

A VLBA survey of radio stars in the Orion Nebula Cluster. I. The nonthermal radio population.

FORBRICH J., DZIB S.A., REID M.J. and MENTEN K.M.

Abstract (from CDS):

We present first results of a four-epoch VLBA survey for nonthermal emission toward all 556 compact radio sources previously identified in a deep VLA survey of the Orion Nebula Cluster (ONC). We identify VLBA counterparts toward an unprecedented 123 sources. Of these, 41 do not have X-ray counterparts, of which 34 also do not display near-infrared counterparts. Since these cannot be explained by extragalactic background sources, this suggests a component of the ONC population of young stellar objects that are too deeply embedded for even X-rays to be detectable. We find pervasive variability and detect even most of the highest-S/N sources in only one out of four epochs. Neither a negative spectral index nor extreme variability in the VLA data is a good predictor of a VLBA detection.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Non-thermal radiation sources - Star formation - Radio astrometry

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 130

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2021.05.15-14:37:02

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