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

被引：12

作者：

Bult, Peter ^{[1
]}

Altamirano, Diego ^{[2
]}

Arzoumanian, Zaven ^{[1
]}

Cackett, Edward M. ^{[3
]}

Chakrabarty, Deepto ^{[4
]}

Doty, John ^{[5
]}

Enoto, Teruaki ^{[6
,7
]}

Gendreau, Keith C. ^{[1
]}

Guillot, Sebastien ^{[8
,9
]}

Homan, Jeroen ^{[10
,11
]}

Jaisawal, Gaurava K. ^{[12
]}

Lamb, Frederick K. ^{[13
,14
,15
]}

Ludlam, Renee M. ^{[16
]}

Mahmoodifar, Simin ^{[1
,17
,18
,19
]}

Markwardt, Craig ^{[1
]}

Okajima, Takashi ^{[1
]}

Price, Sam ^{[20
]}

Strohmayer, Tod E. ^{[1
,17
]}

Winternitz, Luke ^{[20
]}

机构：

[1] NASA, Astrophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Univ Southampton, Phys & Astron, Southampton SO17 1BJ, Hants, England

[3] Wayne State Univ, Dept Phys & Astron, 666 West Hancock, Detroit, MI 48201 USA

[4] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[5] Noqsi Aerosp Ltd, 2822 South Nova Rd, Pine, CO 80470 USA

[6] Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto, Kyoto 6068502, Japan

[7] Kyoto Univ, Hakubi Ctr Adv Res, Sakyo Ku, Yoshida Ushinomiya Cho, Kyoto, Kyoto 6068302, Japan

[8] IRAP, CNRS, 9 Ave Colonel Roche,BP 44346, F-31028 Toulouse 4, France

[9] Univ Toulouse, CNES, UPS OMP, F-31028 Toulouse, France

[10] Eureka Sci Inc, 2452 Delmer St, Oakland, CA 94602 USA

[11] SRON Netherlands Inst Space Res, SRON, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands

[12] Tech Univ Denmark, Natl Space Inst, Elektrovej 327-328, DK-2800 Lyngby, Denmark

[13] Univ Illinois, Ctr Theoret Astrophys, 1110 West Green St, Urbana, IL 61801 USA

[14] Univ Illinois, Dept Phys, 1110 West Green St, Urbana, IL 61801 USA

[15] Univ Illinois, Dept Astron, 1002 West Green St, Urbana, IL 61801 USA

[16] Univ Michigan, Dept Astron, 1085 South Univ Ave, Ann Arbor, MI 48109 USA

[17] NASA, Joint Space Sci Inst, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[18] Univ Maryland, CRESST II, College Pk, MD 20742 USA

[19] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[20] NASA, Mission Engn & Syst Anal Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2018年 / 860卷 / 01期

关键词：

accretion; accretion disks; stars: neutron; X-rays: binaries; X-rays: individual (4U 0614+09); UNIFIED DESCRIPTION; MILLISECOND PULSAR; TIMING FEATURES; ACCRETION DISK; BINARIES; FREQUENCY; MODEL; VARIABILITY; 4U-0614+09; DISCOVERY;

D O I：

10.3847/2041-8213/aac893

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：6

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