Observations of radio pulses from CU virginisCitation formats

  • External authors:
  • V. Ravi
  • G. Hobbs
  • D. Wickramasinghe
  • D. J. Champion
  • R. N. Manchester
  • R. P. Norris
  • J. D. Bray
  • L. Ferrario
  • D. Melrose

Standard

Observations of radio pulses from CU virginis. / Ravi, V.; Hobbs, G.; Wickramasinghe, D.; Champion, D. J.; Keith, M.; Manchester, R. N.; Norris, R. P.; Bray, J. D.; Ferrario, L.; Melrose, D.

In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 408, No. 1, 10.2010, p. L99-L103.

Research output: Contribution to journalArticle

Harvard

Ravi, V, Hobbs, G, Wickramasinghe, D, Champion, DJ, Keith, M, Manchester, RN, Norris, RP, Bray, JD, Ferrario, L & Melrose, D 2010, 'Observations of radio pulses from CU virginis', Monthly Notices of the Royal Astronomical Society: Letters, vol. 408, no. 1, pp. L99-L103. https://doi.org/10.1111/j.1745-3933.2010.00939.x

APA

Ravi, V., Hobbs, G., Wickramasinghe, D., Champion, D. J., Keith, M., Manchester, R. N., ... Melrose, D. (2010). Observations of radio pulses from CU virginis. Monthly Notices of the Royal Astronomical Society: Letters, 408(1), L99-L103. https://doi.org/10.1111/j.1745-3933.2010.00939.x

Vancouver

Ravi V, Hobbs G, Wickramasinghe D, Champion DJ, Keith M, Manchester RN et al. Observations of radio pulses from CU virginis. Monthly Notices of the Royal Astronomical Society: Letters. 2010 Oct;408(1):L99-L103. https://doi.org/10.1111/j.1745-3933.2010.00939.x

Author

Ravi, V. ; Hobbs, G. ; Wickramasinghe, D. ; Champion, D. J. ; Keith, M. ; Manchester, R. N. ; Norris, R. P. ; Bray, J. D. ; Ferrario, L. ; Melrose, D. / Observations of radio pulses from CU virginis. In: Monthly Notices of the Royal Astronomical Society: Letters. 2010 ; Vol. 408, No. 1. pp. L99-L103.

Bibtex

@article{53c59806733c41e8a3cd515c616ec0b1,
title = "Observations of radio pulses from CU virginis",
abstract = "The magnetic chemically peculiar star CU Virginis is a unique astrophysical laboratory for stellar magnetospheres and coherent emission processes. It is the only known main-sequence star to emit a radio pulse every rotation period. Here we report on new observations of the CU Virginis pulse profile in the 13- and 20-cm radio bands. The profile is known to be characterized by two peaks of 100 per cent circularly polarized emission that are thought to arise in an electron-cyclotron maser mechanism. We find that the trailing peak is stable at both 13 and 20 cm, whereas the leading peak is intermittent at 13 cm. Our measured pulse arrival times confirm the discrepancy previously reported between the putative stellar rotation rates measured with optical data and with radio observations. We suggest that this period discrepancy might be caused by an unknown companion or by instabilities in the emission region. Regular long-term pulse timing and simultaneous multiwavelength observations are essential to clarify the behaviour of this emerging class of transient radio source. {\circledC} 2010 The Authors. Journal compilation {\circledC} 2010 RAS.",
keywords = "Radiation mechanisms: non-thermal, Radio continuum: stars, Stars: individual: CU virginis, Stars: magnetic field, Stars: rotation",
author = "V. Ravi and G. Hobbs and D. Wickramasinghe and Champion, {D. J.} and M. Keith and Manchester, {R. N.} and Norris, {R. P.} and Bray, {J. D.} and L. Ferrario and D. Melrose",
year = "2010",
month = "10",
doi = "10.1111/j.1745-3933.2010.00939.x",
language = "English",
volume = "408",
pages = "L99--L103",
journal = "Royal Astronomical Society. Monthly Notices. Letters",
issn = "1745-3933",
publisher = "Oxford University Press",
number = "1",

}

RIS

TY - JOUR

T1 - Observations of radio pulses from CU virginis

AU - Ravi, V.

AU - Hobbs, G.

AU - Wickramasinghe, D.

AU - Champion, D. J.

AU - Keith, M.

AU - Manchester, R. N.

AU - Norris, R. P.

AU - Bray, J. D.

AU - Ferrario, L.

AU - Melrose, D.

PY - 2010/10

Y1 - 2010/10

N2 - The magnetic chemically peculiar star CU Virginis is a unique astrophysical laboratory for stellar magnetospheres and coherent emission processes. It is the only known main-sequence star to emit a radio pulse every rotation period. Here we report on new observations of the CU Virginis pulse profile in the 13- and 20-cm radio bands. The profile is known to be characterized by two peaks of 100 per cent circularly polarized emission that are thought to arise in an electron-cyclotron maser mechanism. We find that the trailing peak is stable at both 13 and 20 cm, whereas the leading peak is intermittent at 13 cm. Our measured pulse arrival times confirm the discrepancy previously reported between the putative stellar rotation rates measured with optical data and with radio observations. We suggest that this period discrepancy might be caused by an unknown companion or by instabilities in the emission region. Regular long-term pulse timing and simultaneous multiwavelength observations are essential to clarify the behaviour of this emerging class of transient radio source. © 2010 The Authors. Journal compilation © 2010 RAS.

AB - The magnetic chemically peculiar star CU Virginis is a unique astrophysical laboratory for stellar magnetospheres and coherent emission processes. It is the only known main-sequence star to emit a radio pulse every rotation period. Here we report on new observations of the CU Virginis pulse profile in the 13- and 20-cm radio bands. The profile is known to be characterized by two peaks of 100 per cent circularly polarized emission that are thought to arise in an electron-cyclotron maser mechanism. We find that the trailing peak is stable at both 13 and 20 cm, whereas the leading peak is intermittent at 13 cm. Our measured pulse arrival times confirm the discrepancy previously reported between the putative stellar rotation rates measured with optical data and with radio observations. We suggest that this period discrepancy might be caused by an unknown companion or by instabilities in the emission region. Regular long-term pulse timing and simultaneous multiwavelength observations are essential to clarify the behaviour of this emerging class of transient radio source. © 2010 The Authors. Journal compilation © 2010 RAS.

KW - Radiation mechanisms: non-thermal

KW - Radio continuum: stars

KW - Stars: individual: CU virginis

KW - Stars: magnetic field

KW - Stars: rotation

U2 - 10.1111/j.1745-3933.2010.00939.x

DO - 10.1111/j.1745-3933.2010.00939.x

M3 - Article

VL - 408

SP - L99-L103

JO - Royal Astronomical Society. Monthly Notices. Letters

JF - Royal Astronomical Society. Monthly Notices. Letters

SN - 1745-3933

IS - 1

ER -