Sgr A* Region: 318 Compact Radio Sources with Infrared Counterparts

318 compact radio sources detected at 34.5 GHz within 30 arcseconds of the Galactic center's supermassive black hole, Sgr A*. The catalog, created by NASA HEASARC in 2016, includes 45 sources with identified near-infrared stellar counterparts from VLT/NACO observations. Data from 2011 and 2014 VLA radio observations were used to investigate proper motions and mass-loss rates of massive stars.

Use Cases

• Analyze stellar proper motions based on multi 2011 and 2014 radio observations mentioned in the description
• Investigate mass-loss rates of massive stars based on radio continuum and near-infrared data
• Study the population of proplyd candidates and massive stars near Sgr A*
• Model accretion rates onto Sgr A* based on revised stellar wind data

Strengths

• Contains 318 compact radio sources with precise positions relative to Sgr A*
• Includes 45 sources with identified near-infrared stellar counterparts
• Proper motion analysis shows an rms scatter as low as 6 milliarcseconds for some methods

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Radio continuum observations from the VLA (program 14A-232) and near-infrared observations from the VLT/NACO instrument.

Time Range

Radio observations from 2011 and 2014; near-infrared observations from 2012.

Freshness

Last updated 2026 03 13 19:24:13.643806; freshness should be verified

Geography

Galactic center region, specifically within 30 arcseconds of Sgr A*.