Radio-continuum detections of Galactic Planetary Nebulae I. MASH PNe detected in large-scale radio surveys

TL;DR

This paper compiles and analyzes radio-continuum data for approximately 250 Galactic Planetary Nebulae from large-scale surveys, revealing their faint radio characteristics and spectral properties, and comparing them with previously known PNe.

Contribution

It provides an updated radio-continuum database for MASH PNe, including new detections and analysis of their radio properties and evolutionary status.

Findings

Radio counterparts found for ~250 MASH PNe.

MASH PNe are predominantly radio-faint compared to known Galactic PNe.

Spectral properties analyzed for a subset in the declination strip -30° to -40°.

Abstract

We present an updated and newly compiled radio-continuum data-base for MASH PNe detected in the extant large scale "blind" radio-continuum surveys (NVSS, SUMSS/MGPS-2 and PMN) and, for a small number of MASH PNe, observed and detected in targeted radio-continuum observations. We found radio counterparts for approximately 250 MASH PNe. In comparison with the percentage of previously known Galactic PNe detected in the NVSS and MGPS-2 radio-continuum surveys and according to their position on the flux density-angular diameter and the radio brightness temperature evolutionary diagrams we conclude, unsurprisingly, that the MASH sample presents the radio-faint end of the known Galactic PNe population. Also, we present radio-continuum spectral properties of a small sub-sample of MASH PNe located in the strip between declinations -30arcdeg and -40arcdeg, that are detected in both the NVSS and MGPS-2 radio surveys.