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Physical constraints from near-infrared fast photometry of the black hole transient GX 339-4

Physical constraints from near-infrared fast photometry of the black hole transient GX 339-4
Physical constraints from near-infrared fast photometry of the black hole transient GX 339-4
We present results from the first multi-epoch X-ray/IR fast-photometry campaign on the black hole transient GX 339–4, during its 2015 outburst decay. We studied the evolution of the power spectral densities finding strong differences between the two bands. The X-ray power spectral density follows standard patterns of evolution, plausibly reflecting changes in the accretion flow. The IR power spectral density instead evolves very slowly, with a high-frequency break consistent with remaining constant at 0.63 ± 0.03 Hz throughout the campaign. We discuss this result in the context of the currently available models for the IR emission in black hole transients. While all models will need to be tested quantitatively against this unexpected constraint, we show that an IR-emitting relativistic jet that filters out the short-timescale fluctuations injected from the accretion inflow appears as the most plausible scenario.
2041-8205
Vincentelli, F.M.
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Casella, P.
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Petrucci, P.
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Maccarone, T.
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Russell, D.M.
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Uttley, P.
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Marco, B. De
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Fender, R.
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Gandhi, P.
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Malzac, J.
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O’brien, K.
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Tomsick, J.A.
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Vincentelli, F.M.
6059e516-6e7a-4d18-afa4-c5b68a3b207a
Casella, P.
c254f195-d43d-4385-98ef-d33600fb7f81
Petrucci, P.
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Maccarone, T.
c2f1d87b-e2ef-4e33-b09f-a2861d917ea8
Russell, D.M.
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Uttley, P.
db770bd7-d97e-43f5-99d4-a585bccd352a
Marco, B. De
7764443e-25f3-499b-9be5-887c36a15dc1
Fender, R.
c802ddfc-25a3-4c0e-899d-11c405c705d1
Gandhi, P.
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Malzac, J.
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O’brien, K.
20ad7843-2035-42c7-9bd4-b58aef7e3253
Tomsick, J.A.
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Vincentelli, F.M., Casella, P., Petrucci, P., Maccarone, T., Russell, D.M., Uttley, P., Marco, B. De, Fender, R., Gandhi, P., Malzac, J., O’brien, K. and Tomsick, J.A. (2019) Physical constraints from near-infrared fast photometry of the black hole transient GX 339-4. Astrophysical Journal Letters, 887 (1), [L19]. (doi:10.3847/2041-8213/ab5860).

Record type: Article

Abstract

We present results from the first multi-epoch X-ray/IR fast-photometry campaign on the black hole transient GX 339–4, during its 2015 outburst decay. We studied the evolution of the power spectral densities finding strong differences between the two bands. The X-ray power spectral density follows standard patterns of evolution, plausibly reflecting changes in the accretion flow. The IR power spectral density instead evolves very slowly, with a high-frequency break consistent with remaining constant at 0.63 ± 0.03 Hz throughout the campaign. We discuss this result in the context of the currently available models for the IR emission in black hole transients. While all models will need to be tested quantitatively against this unexpected constraint, we show that an IR-emitting relativistic jet that filters out the short-timescale fluctuations injected from the accretion inflow appears as the most plausible scenario.

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Physical Constraints from Near-infrared Fast Photometry of the Black Hole Transient GX 339-4 - Accepted Manuscript
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Accepted/In Press date: 14 November 2019
e-pub ahead of print date: 10 December 2019
Additional Information: arXiv is AM

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Local EPrints ID: 438011
URI: http://eprints.soton.ac.uk/id/eprint/438011
ISSN: 2041-8205
PURE UUID: 3b42b2c6-8b6e-46ae-8f15-c7eeecbe476f
ORCID for P. Gandhi: ORCID iD orcid.org/0000-0003-3105-2615

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Date deposited: 26 Feb 2020 17:30
Last modified: 07 Oct 2020 02:06

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Contributors

Author: P. Casella
Author: P. Petrucci
Author: T. Maccarone
Author: D.M. Russell
Author: P. Uttley
Author: B. De Marco
Author: R. Fender
Author: P. Gandhi ORCID iD
Author: J. Malzac
Author: K. O’brien
Author: J.A. Tomsick

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