The Population of Compact Radio Sources in the Orion Nebula Cluster

We present a deep centimeter-wavelength catalog of the Orion Nebula Cluster (ONC), based on a 30h 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 GHz and 7.3 GHz. A total of 556 compact sources were det...

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Bibliographic Details
Published in:arXiv.org 2016-03
Main Authors: brich, Jan, Rivilla, Victor M, Menten, Karl M, Reid, Mark J, Chandler, Claire J, Rau, Urvashi, Bhatnagar, Sanjay, Wolk, Scott J, Meingast, Stefan
Format: Article
Language:English
Subjects:
Broadband
Clusters
Orion nebula
Radio
Online Access:Get full text
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Summary:We present a deep centimeter-wavelength catalog of the Orion Nebula Cluster (ONC), based on a 30h 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 GHz and 7.3 GHz. A total of 556 compact sources were detected in a map with a nominal rms noise of 3 muJy/bm, 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1603.05666