期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 446, 期 3, 页码 2560-2565出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu2253
关键词
radio continuum: planetary systems
资金
- US National Science Foundation [AST-0457585, PHY-0835713, CAREER-0847753, AST-0908884]
- Australian Research Council [LE0775621, LE0882938]
- US Air Force Office of Scientific Research [FA9550-0510247]
- Centre for All-sky Astrophysics (an Australian Research Council Centre of Excellence) [CE110001020]
- Smithsonian Astrophysical Observatory
- MIT School of Science
- Raman Research Institute
- Australian National University
- Victoria University of Wellington from the New Zealand Ministry of Economic Development [MED-E1799]
- Victoria University of Wellington from IBM Shared University Research Grant [MED-E1799]
- Australian Federal government via the CSIRO
- Australian Federal government via National Collaborative Research Infrastructure Strategy, Education Investment Fund
- Australian Federal government via Australia India Strategic Research Fund
- Astronomy Australia Limited
- NVIDIA at Harvard University
- International Centre for Radio Astronomy Research (ICRAR)
- Western Australian State government
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1412421] Funding Source: National Science Foundation
We present the results of a survey for low-frequency radio emission from 17 known exoplanetary systems with the Murchison Widefield Array. This sample includes 13 systems that have not previously been targeted with radio observations. We detected no radio emission at 154 MHz, and put 3 sigma upper limits in the range 15.2-112.5 mJy on this emission. We also searched for circularly polarized emission and made no detections, obtaining 3 sigma upper limits in the range 3.4-49.9 mJy. These are comparable with the best low-frequency radio limits in the existing literature and translate to luminosity limits of between 1.2 x 10(14) and 1.4 x 10(17) W if the emission is assumed to be 100 per cent circularly polarized. These are the first results from a larger program to systematically search for exoplanetary emission with the MWA.
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