NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09

Peter Bult; Diego Altamirano; Zaven Arzoumanian; Edward M. Cackett; Deepto Chakrabarty; John Doty; Teruaki Enoto; Keith C. Gendreau; Sebastien Guillot; Jeroen Homan; Gaurava K. Jaisawal; Frederick K. Lamb; Renee M. Ludlam; Simin Mahmoodifar; Craig Markwardt; Takashi Okajima; Sam Price; Tod E. Strohmayer; Luke Winternitz

doi:10.3847/2041-8213/aac893

NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09

Peter Bult, Diego Altamirano, Zaven Arzoumanian, Edward M. Cackett, Deepto Chakrabarty, John Doty, Teruaki Enoto, Keith C. Gendreau, Sebastien Guillot, Jeroen Homan, Gaurava K. Jaisawal, Frederick K. Lamb, Renee M. Ludlam, Simin Mahmoodifar, Craig Markwardt, Takashi Okajima, Sam Price, Tod E. Strohmayer, Luke Winternitz

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the detection of a kilohertz quasi-periodic oscillation (QPO) with the Neutron Star Interior Composition Explorer (NICER). Analyzing approximately 165 ks of NICER exposure on the X-ray burster 4U 0614+09, we detect multiple instances of a single-peak upper kHz QPO, with centroid frequencies that range from 400 to 750 Hz. We resolve the kHz QPO as a function of energy, and measure, for the first time, the QPO amplitude below 2 keV. We find the fractional amplitude at 1 keV is on the order of 2% rms, and discuss the implications for the QPO emission process in the context of Comptonization models.

Original language	English (US)
Article number	L9
Journal	Astrophysical Journal Letters
Volume	860
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/aac893
State	Published - Jun 10 2018

Keywords

accretion, accretion disks
stars: neutron
X-rays: binaries
X-rays: individual (4U 0614+09) Supporting material: data behind figure

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/2041-8213/aac893

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Bult, P., Altamirano, D., Arzoumanian, Z., Cackett, E. M., Chakrabarty, D., Doty, J., Enoto, T., Gendreau, K. C., Guillot, S., Homan, J., Jaisawal, G. K., Lamb, F. K., Ludlam, R. M., Mahmoodifar, S., Markwardt, C., Okajima, T., Price, S., Strohmayer, T. E., & Winternitz, L. (2018). NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09. Astrophysical Journal Letters, 860(1), Article L9. https://doi.org/10.3847/2041-8213/aac893

Bult, P, Altamirano, D, Arzoumanian, Z, Cackett, EM, Chakrabarty, D, Doty, J, Enoto, T, Gendreau, KC, Guillot, S, Homan, J, Jaisawal, GK, Lamb, FK, Ludlam, RM, Mahmoodifar, S, Markwardt, C, Okajima, T, Price, S, Strohmayer, TE & Winternitz, L 2018, 'NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09', Astrophysical Journal Letters, vol. 860, no. 1, L9. https://doi.org/10.3847/2041-8213/aac893

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title = "NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09",

abstract = "We report on the detection of a kilohertz quasi-periodic oscillation (QPO) with the Neutron Star Interior Composition Explorer (NICER). Analyzing approximately 165 ks of NICER exposure on the X-ray burster 4U 0614+09, we detect multiple instances of a single-peak upper kHz QPO, with centroid frequencies that range from 400 to 750 Hz. We resolve the kHz QPO as a function of energy, and measure, for the first time, the QPO amplitude below 2 keV. We find the fractional amplitude at 1 keV is on the order of 2% rms, and discuss the implications for the QPO emission process in the context of Comptonization models.",

keywords = "accretion, accretion disks, stars: neutron, X-rays: binaries, X-rays: individual (4U 0614+09) Supporting material: data behind figure",

author = "Peter Bult and Diego Altamirano and Zaven Arzoumanian and Cackett, {Edward M.} and Deepto Chakrabarty and John Doty and Teruaki Enoto and Gendreau, {Keith C.} and Sebastien Guillot and Jeroen Homan and Jaisawal, {Gaurava K.} and Lamb, {Frederick K.} and Ludlam, {Renee M.} and Simin Mahmoodifar and Craig Markwardt and Takashi Okajima and Sam Price and Strohmayer, {Tod E.} and Luke Winternitz",

note = "This work was supported by NASA through the NICER mission and the Astrophysics Explorers Program, and made use of data and software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC). P.B. was supported by an NPP fellowship at NASA Goddard Space Flight Center. E.M.C. gratefully acknowledges NSF CAREER award AST-1351222. Facilities: ADS, HEASARC, NICER.",

year = "2018",

month = jun,

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doi = "10.3847/2041-8213/aac893",

language = "English (US)",

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AU - Bult, Peter

AU - Altamirano, Diego

AU - Arzoumanian, Zaven

AU - Cackett, Edward M.

AU - Chakrabarty, Deepto

AU - Doty, John

AU - Enoto, Teruaki

AU - Gendreau, Keith C.

AU - Guillot, Sebastien

AU - Homan, Jeroen

AU - Jaisawal, Gaurava K.

AU - Lamb, Frederick K.

AU - Ludlam, Renee M.

AU - Mahmoodifar, Simin

AU - Markwardt, Craig

AU - Okajima, Takashi

AU - Price, Sam

AU - Strohmayer, Tod E.

AU - Winternitz, Luke

N1 - This work was supported by NASA through the NICER mission and the Astrophysics Explorers Program, and made use of data and software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC). P.B. was supported by an NPP fellowship at NASA Goddard Space Flight Center. E.M.C. gratefully acknowledges NSF CAREER award AST-1351222. Facilities: ADS, HEASARC, NICER.

PY - 2018/6/10

Y1 - 2018/6/10

N2 - We report on the detection of a kilohertz quasi-periodic oscillation (QPO) with the Neutron Star Interior Composition Explorer (NICER). Analyzing approximately 165 ks of NICER exposure on the X-ray burster 4U 0614+09, we detect multiple instances of a single-peak upper kHz QPO, with centroid frequencies that range from 400 to 750 Hz. We resolve the kHz QPO as a function of energy, and measure, for the first time, the QPO amplitude below 2 keV. We find the fractional amplitude at 1 keV is on the order of 2% rms, and discuss the implications for the QPO emission process in the context of Comptonization models.

AB - We report on the detection of a kilohertz quasi-periodic oscillation (QPO) with the Neutron Star Interior Composition Explorer (NICER). Analyzing approximately 165 ks of NICER exposure on the X-ray burster 4U 0614+09, we detect multiple instances of a single-peak upper kHz QPO, with centroid frequencies that range from 400 to 750 Hz. We resolve the kHz QPO as a function of energy, and measure, for the first time, the QPO amplitude below 2 keV. We find the fractional amplitude at 1 keV is on the order of 2% rms, and discuss the implications for the QPO emission process in the context of Comptonization models.

KW - accretion, accretion disks

KW - stars: neutron

KW - X-rays: binaries

KW - X-rays: individual (4U 0614+09) Supporting material: data behind figure

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JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09

Abstract

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