The Population of Compact Radio Sources in the Orion Nebula Cluster
- Author(s)
- Jan Forbrich, V. M. Rivilla, Karl M. Menten, Mark J. Reid, C. J. Chandler, Stefan Meingast
- Abstract
We present a deep centimeter-wavelength catalog of the Orion Nebula Cluster (ONC), based on a 30 hr single-pointing observation with the Karl G. Jansky Very Large Array in its high-resolution A-configuration using two 1 GHz bands centered at 4.7 and 7.3 GHz. A total of 556 compact sources were detected in a map with a nominal rms noise of 3 μJy bm-1, limited by complex source structure and the primary beam response. Compared to previous catalogs, our detections increase the sample of known compact radio sources in the ONC by more than a factor of seven. The new data show complex emission on a wide range of spatial scales. Following a preliminary correction for the wideband primary-beam response, we determine radio spectral indices for 170 sources whose index uncertainties are less than ±0.5. We compare the radio to the X-ray and near-infrared point-source populations, noting similarities and differences.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Harvard-Smithsonian Center for Astrophysics, INAF - Osservatorio Astrofisico di Arcetri, Spanish National Research Council (CSIC), Max-Planck-Institut für Radioastronomie, National Radio Astronomy Observatory Socorro
- Journal
- The Astrophysical Journal
- Volume
- 822
- No. of pages
- 13
- ISSN
- 0004-637X
- DOI
- https://doi.org/10.3847/0004-637X/822/2/93
- Publication date
- 05-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/the-population-of-compact-radio-sources-in-the-orion-nebula-cluster(7b1c8d08-b921-49aa-83e3-ba99f246c5dc).html