Unveiling recurrent jets of the ULX holmberg II X-1: Evidence for a massive stellar-mass black hole?

D. Cseh, P. Kaaret, S. Corbel, F. Grisé, C. Lang, E. Körding, H. Falcke, P. G. Jonker, J. C.A. Miller-Jones, S. Farrell, Y. J. Yang, Z. Paragi, S. Frey

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We report on the discovery of an apparent triple radio structure hidden inside the radio bubble of the ultraluminous X-ray source Holmberg II X-1. The morphology is consistent with a collimated jet structure, which is observed to emit optically thin synchrotron radiation. The central component has a steep radio spectrum and is brighter than the outer components indicating a renewed radio activity.We estimate a minimum time-averaged jet power of ~2 × 1039 erg s-1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 1039 erg s-1. Our results suggest that Holmberg II X-1 is powered by a black hole of MBH ≥ 25 M⊙, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.

Original languageEnglish (US)
Article numberslt166
Pages (from-to)L1-L5
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume439
Issue number1
DOIs
StatePublished - Mar 1 2014

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radioactivity
stellar mass
radio
erg
radio spectra
synchrotron radiation
x rays
bubbles
luminosity
bubble
estimates

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Cseh, D. ; Kaaret, P. ; Corbel, S. ; Grisé, F. ; Lang, C. ; Körding, E. ; Falcke, H. ; Jonker, P. G. ; Miller-Jones, J. C.A. ; Farrell, S. ; Yang, Y. J. ; Paragi, Z. ; Frey, S. / Unveiling recurrent jets of the ULX holmberg II X-1 : Evidence for a massive stellar-mass black hole?. In: Monthly Notices of the Royal Astronomical Society: Letters. 2014 ; Vol. 439, No. 1. pp. L1-L5.
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abstract = "We report on the discovery of an apparent triple radio structure hidden inside the radio bubble of the ultraluminous X-ray source Holmberg II X-1. The morphology is consistent with a collimated jet structure, which is observed to emit optically thin synchrotron radiation. The central component has a steep radio spectrum and is brighter than the outer components indicating a renewed radio activity.We estimate a minimum time-averaged jet power of ~2 × 1039 erg s-1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 1039 erg s-1. Our results suggest that Holmberg II X-1 is powered by a black hole of MBH ≥ 25 M⊙, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.",
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Cseh, D, Kaaret, P, Corbel, S, Grisé, F, Lang, C, Körding, E, Falcke, H, Jonker, PG, Miller-Jones, JCA, Farrell, S, Yang, YJ, Paragi, Z & Frey, S 2014, 'Unveiling recurrent jets of the ULX holmberg II X-1: Evidence for a massive stellar-mass black hole?', Monthly Notices of the Royal Astronomical Society: Letters, vol. 439, no. 1, slt166, pp. L1-L5. https://doi.org/10.1093/mnrasl/slt166

Unveiling recurrent jets of the ULX holmberg II X-1 : Evidence for a massive stellar-mass black hole? / Cseh, D.; Kaaret, P.; Corbel, S.; Grisé, F.; Lang, C.; Körding, E.; Falcke, H.; Jonker, P. G.; Miller-Jones, J. C.A.; Farrell, S.; Yang, Y. J.; Paragi, Z.; Frey, S.

In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 439, No. 1, slt166, 01.03.2014, p. L1-L5.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Unveiling recurrent jets of the ULX holmberg II X-1

T2 - Evidence for a massive stellar-mass black hole?

AU - Cseh, D.

AU - Kaaret, P.

AU - Corbel, S.

AU - Grisé, F.

AU - Lang, C.

AU - Körding, E.

AU - Falcke, H.

AU - Jonker, P. G.

AU - Miller-Jones, J. C.A.

AU - Farrell, S.

AU - Yang, Y. J.

AU - Paragi, Z.

AU - Frey, S.

PY - 2014/3/1

Y1 - 2014/3/1

N2 - We report on the discovery of an apparent triple radio structure hidden inside the radio bubble of the ultraluminous X-ray source Holmberg II X-1. The morphology is consistent with a collimated jet structure, which is observed to emit optically thin synchrotron radiation. The central component has a steep radio spectrum and is brighter than the outer components indicating a renewed radio activity.We estimate a minimum time-averaged jet power of ~2 × 1039 erg s-1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 1039 erg s-1. Our results suggest that Holmberg II X-1 is powered by a black hole of MBH ≥ 25 M⊙, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.

AB - We report on the discovery of an apparent triple radio structure hidden inside the radio bubble of the ultraluminous X-ray source Holmberg II X-1. The morphology is consistent with a collimated jet structure, which is observed to emit optically thin synchrotron radiation. The central component has a steep radio spectrum and is brighter than the outer components indicating a renewed radio activity.We estimate a minimum time-averaged jet power of ~2 × 1039 erg s-1 that is associated with a time-averaged isotropic X-ray luminosity of at least 4 × 1039 erg s-1. Our results suggest that Holmberg II X-1 is powered by a black hole of MBH ≥ 25 M⊙, that is inferred to be accreting at a high Eddington rate with intermittent radio activity.

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