Limits on low frequency radio emission from southern exoplanets with the Murchison Widefield Array

Abstract

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 polarised 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 W and 1.4 x 10^17 W if the emission is assumed to be 100% circularly polarised. These are the first results from a larger program to systematically search for exoplanetary emission with the MWA.

Accepted for publication in MNRAS. Updated author list from last revision

References in corpus (3)

• WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
• Predicting low-frequency radio fluxes of known extrasolar planets
• GMRT Low Frequency Observations of Extrasolar Planetary Systems

Cited by in corpus (17)

• The low-frequency environment of the Murchison Widefield Array: radio-frequency interference analysis and mitigation
• The search for radio emission from the exoplanetary systems 55 Cancri, $\upsilon$ Andromedae, and $\tau$ Boötis using LOFAR beam-formed observations
• Estimating the magnetic field strength in hot Jupiters
• The challenges of low-frequency radio polarimetry: lessons from the Murchison Widefield Array
• A search for long-timescale, low-frequency radio transients
• Science with the Murchison Widefield Array: Phase I Results and Phase II Opportunities
• A search for circularly polarised emission from young exoplanets
• Follow-up LOFAR observations of the $\tau$ Boötis exoplanetary system
• No Massive Companion to the Coherent Radio-Emitting M Dwarf GJ 1151
• LOFAR Observations of Swift J1644+57 and Implications for Short-Duration Transients
• Non-thermal emission from the interaction of magnetized exoplanets with the wind of their host star
• Search for radio emission from the exoplanets Qatar-1b and WASP-80b near 150 MHz using the Giant Metrewave Radio Telescope
• Limits on long-time-scale radio transients at 150 MHz using the TGSS ADR1 and LoTSS DR2 catalogues
• Infrared-Radio-follow-up Observations for Detection of the Magnetic Radio Emission of Extra-Solar Planets: A New Window to Detect Exoplanets
• A circularly polarized low-frequency radio burst from the exoplanetary system HD 189733
• Multi-epoch Low Radio Frequency Surveys of the Kepler K2 Mission Campaign Fields 3, 4, and 5 with the Murchison Widefield Array
• Radio prospects of extrasolar aurorae polaris as a probe of planetary magnetism