VLA Goulds Belt Survey: 189 Radio Sources in the Ophiuchus Star-Forming Complex

189 radio sources were detected in the Ophiuchus star-forming complex using the Karl G. Jansky Very Large Array (JVLA) at 4.5 and 7.5 GHz. The catalog includes 56 sources associated with known young stellar objects (YSOs), 4 with extragalactic objects, and 129 unclassified sources likely to be background quasars. Observations were conducted by the National Radio Astronomy Observatory (NRAO) in three epochs during 2011, achieving high-resolution (~1 arcsecond) and deep sensitivity (~20 μJy).

Use Cases

• Classifying radio source populations (young stars, extragalactic objects, quasars) based on multi-wavelength counterpart associations mentioned in the description.
• Studying non thermal gyrosynchrotron emission and stellar activity based on the detection of variable, polarized sources with negative spectral indices.
• Investigating the evolution of stellar radio emission based on the described trend from younger Class 0/I to more evolved Class III stars.
• Calibrating future radio observations using the identified ~70 mJy compact extragalactic source near the Ophiuchus core.

Strengths

• Contains 189 detected sources from a large-scale (~2000 arcmin²) survey.
• Provides deep sensitivity (~20 μJy) and high angular resolution (~1 arcsecond) radio observations.
• Includes cross-referenced identifications from major catalogs (SIMBAD, Spitzer c2d) at X-ray, optical, and infrared wavelengths.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect observational bias inherent to the specific JVLA configuration and epochs used.

Provenance

Source

National Radio Astronomy Observatory (NRAO) / National Aeronautics and Space Administration

Collection Method

Radio observations from the Karl G. Jansky Very Large Array (JVLA) at 4.5 and 7.5 GHz, with source detection criteria based on signal-to-noise ratios and counterpart matching.

Time Range

Observations from three epochs in 2011 (February, April, May).

Freshness

Last updated 2026-03-13 18:02:23.463825; freshness should be verified.

Geography

Ophiuchus star-forming complex region in the sky.