Limits on low-frequency radio emission from southern exoplanets with the murchison widefield array

Tara Murphy; Martin E. Bell; David L. Kaplan; B. M. Gaensler; André R. Offringa; Emil Lenc; Natasha Hurley-Walker; G. Bernardi; J. D. Bowman; F. Briggs; R. J. Cappallo; B. E. Corey; A. A. Deshpande; D. Emrich; R. Goeke; L. J. Greenhill; B. J. Hazelton; J. N. Hewitt; M. Johnston-Hollitt; J. C. Kasper; E. Kratzenberg; C. J. Lonsdale; M. J. Lynch; S. R. McWhirter; D. A. Mitchell; M. F. Morales; E. Morgan; D. Oberoi; S. M. Ord; T. Prabu; A. E.E. Rogers; D. A. Roshi; N. Udaya Shankar; K. S. Srivani; R. Subrahmanyan; S. J. Tingay; M. Waterson; R. B. Wayth; R. L. Webster; A. R. Whitney; A. Williams; C. L. Williams

doi:10.1093/mnras/stu2253

Limits on low-frequency radio emission from southern exoplanets with the murchison widefield array

Tara Murphy^*, Martin E. Bell, David L. Kaplan, B. M. Gaensler, André R. Offringa, Emil Lenc, Natasha Hurley-Walker, G. Bernardi, J. D. Bowman, F. Briggs, R. J. Cappallo, B. E. Corey, A. A. Deshpande, D. Emrich, R. Goeke, L. J. Greenhill, B. J. Hazelton, J. N. Hewitt, M. Johnston-Hollitt, J. C. KasperE. Kratzenberg, C. J. Lonsdale, M. J. Lynch, S. R. McWhirter, D. A. Mitchell, M. F. Morales, E. Morgan, D. Oberoi, S. M. Ord, T. Prabu, A. E.E. Rogers, D. A. Roshi, N. Udaya Shankar, K. S. Srivani, R. Subrahmanyan, S. J. Tingay, M. Waterson, R. B. Wayth, R. L. Webster, A. R. Whitney, A. Williams, C. L. Williams

^*Corresponding author for this work

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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 3τ 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 3τ 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 × 10¹⁴ and 1.4 × 10¹⁷ Wif 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.

Original language	English
Pages (from-to)	2560-2565
Number of pages	6
Journal	Monthly Notices of the Royal Astronomical Society
Volume	446
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stu2253
Publication status	Published - 2015

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Murphy, T., Bell, M. E., Kaplan, D. L., Gaensler, B. M., Offringa, A. R., Lenc, E., Hurley-Walker, N., Bernardi, G., Bowman, J. D., Briggs, F., Cappallo, R. J., Corey, B. E., Deshpande, A. A., Emrich, D., Goeke, R., Greenhill, L. J., Hazelton, B. J., Hewitt, J. N., Johnston-Hollitt, M., ... Williams, C. L. (2015). Limits on low-frequency radio emission from southern exoplanets with the murchison widefield array. Monthly Notices of the Royal Astronomical Society, 446(3), 2560-2565. https://doi.org/10.1093/mnras/stu2253

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title = "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 3τ 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 3τ 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 × 1014 and 1.4 × 1017 Wif 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.",

keywords = "Radio continuum: planetary systems",

author = "Tara Murphy and Bell, {Martin E.} and Kaplan, {David L.} and Gaensler, {B. M.} and Offringa, {Andr{\'e} R.} and Emil Lenc and Natasha Hurley-Walker and G. Bernardi and Bowman, {J. D.} and F. Briggs and Cappallo, {R. J.} and Corey, {B. E.} and Deshpande, {A. A.} and D. Emrich and R. Goeke and Greenhill, {L. J.} and Hazelton, {B. J.} and Hewitt, {J. N.} and M. Johnston-Hollitt and Kasper, {J. C.} and E. Kratzenberg and Lonsdale, {C. J.} and Lynch, {M. J.} and McWhirter, {S. R.} and Mitchell, {D. A.} and Morales, {M. F.} and E. Morgan and D. Oberoi and Ord, {S. M.} and T. Prabu and Rogers, {A. E.E.} and Roshi, {D. A.} and {Udaya Shankar}, N. and Srivani, {K. S.} and R. Subrahmanyan and Tingay, {S. J.} and M. Waterson and Wayth, {R. B.} and Webster, {R. L.} and Whitney, {A. R.} and A. Williams and Williams, {C. L.}",

note = "Publisher Copyright: {\textcopyright} 2014 The Authors.",

year = "2015",

doi = "10.1093/mnras/stu2253",

language = "English",

volume = "446",

pages = "2560--2565",

journal = "Monthly Notices of the Royal Astronomical Society",

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Murphy, T, Bell, ME, Kaplan, DL, Gaensler, BM, Offringa, AR, Lenc, E, Hurley-Walker, N, Bernardi, G, Bowman, JD, Briggs, F, Cappallo, RJ, Corey, BE, Deshpande, AA, Emrich, D, Goeke, R, Greenhill, LJ, Hazelton, BJ, Hewitt, JN, Johnston-Hollitt, M, Kasper, JC, Kratzenberg, E, Lonsdale, CJ, Lynch, MJ, McWhirter, SR, Mitchell, DA, Morales, MF, Morgan, E, Oberoi, D, Ord, SM, Prabu, T, Rogers, AEE, Roshi, DA, Udaya Shankar, N, Srivani, KS, Subrahmanyan, R, Tingay, SJ, Waterson, M, Wayth, RB, Webster, RL, Whitney, AR, Williams, A & Williams, CL 2015, 'Limits on low-frequency radio emission from southern exoplanets with the murchison widefield array', Monthly Notices of the Royal Astronomical Society, vol. 446, no. 3, pp. 2560-2565. https://doi.org/10.1093/mnras/stu2253

TY - JOUR

T1 - Limits on low-frequency radio emission from southern exoplanets with the murchison widefield array

AU - Murphy, Tara

AU - Bell, Martin E.

AU - Kaplan, David L.

AU - Gaensler, B. M.

AU - Offringa, André R.

AU - Lenc, Emil

AU - Hurley-Walker, Natasha

AU - Bernardi, G.

AU - Bowman, J. D.

AU - Briggs, F.

AU - Cappallo, R. J.

AU - Corey, B. E.

AU - Deshpande, A. A.

AU - Emrich, D.

AU - Goeke, R.

AU - Greenhill, L. J.

AU - Hazelton, B. J.

AU - Hewitt, J. N.

AU - Johnston-Hollitt, M.

AU - Kasper, J. C.

AU - Kratzenberg, E.

AU - Lonsdale, C. J.

AU - Lynch, M. J.

AU - McWhirter, S. R.

AU - Mitchell, D. A.

AU - Morales, M. F.

AU - Morgan, E.

AU - Oberoi, D.

AU - Ord, S. M.

AU - Prabu, T.

AU - Rogers, A. E.E.

AU - Roshi, D. A.

AU - Udaya Shankar, N.

AU - Srivani, K. S.

AU - Subrahmanyan, R.

AU - Tingay, S. J.

AU - Waterson, M.

AU - Wayth, R. B.

AU - Webster, R. L.

AU - Whitney, A. R.

AU - Williams, A.

AU - Williams, C. L.

PY - 2015

Y1 - 2015

N2 - 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 3τ 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 3τ 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 × 1014 and 1.4 × 1017 Wif 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.

AB - 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 3τ 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 3τ 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 × 1014 and 1.4 × 1017 Wif 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.

KW - Radio continuum: planetary systems

UR - http://www.scopus.com/inward/record.url?scp=84984950373&partnerID=8YFLogxK

U2 - 10.1093/mnras/stu2253

DO - 10.1093/mnras/stu2253

M3 - Article

SN - 0035-8711

VL - 446

SP - 2560

EP - 2565

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Limits on low-frequency radio emission from southern exoplanets with the murchison widefield array

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