LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING

被引：27

作者：

Altamirano, D. ^{[1
]}

Ingram, A. ^{[2
]}

van der Klis, M. ^{[1
]}

Wijnands, R. ^{[1
]}

Linares, M. ^{[3
]}

Homan, J. ^{[3
]}

机构：

[1] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands

[2] Univ Durham, Dept Phys, Durham DH1 3LE, England

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

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2012年 / 759卷 / 01期

关键词：

binaries: close; stars: individual (IGR J17480; 2446; Terzan; 5); X-rays: binaries; X-RAY BINARIES; BLACK-HOLE CANDIDATES; LENS-THIRRING PRECESSION; ROTATING NEUTRON-STARS; ATOLL SOURCE STATES; SOURCE GX 340+0; IGR J17480-2446; RELATIVISTIC PRECESSION; SPECTRAL PROPERTIES; POWER SPECTRA;

D O I：

10.1088/2041-8205/759/1/L20

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on six RXTE observations taken during the 2010 outburst of the 11 Hz accreting pulsar IGR J17480-2446 located in the globular cluster Terzan 5. During these observations we find power spectra which resemble those seen in Z-type high-luminosity neutron star low-mass X-ray binaries, with a quasi-periodic oscillation (QPO) in the 35-50 Hz range simultaneous with a kHz QPO and broadband noise. Using well-known frequency-frequency correlations, we identify the 35-50 Hz QPOs as the horizontal branch oscillations, which were previously suggested to be due to Lense-Thirring (LT) precession. As IGR J17480-2446 spins more than an order of magnitude more slowly than any of the other neutron stars where these QPOs were found, this QPO cannot be explained by frame dragging. By extension, this casts doubt on the LT precession model for other low-frequency QPOs in neutron stars and perhaps even black hole systems.

引用

页数：5

共 44 条

[1] X-ray time variability across the atoll source states of 4U 1636-53
Altamirano, D.
Van Der Klis, M.
Mendez, M.
Jonker, P. G.
Klein-Wolt, M.
Lewin, W. H. G.
[J]. ASTROPHYSICAL JOURNAL, 2008, 685 (01) : 436 - 450
[2] A unified description of the timing features of accreting X-ray binaries
Belloni, T
Psaltis, D
van der Klis, M
[J]. ASTROPHYSICAL JOURNAL, 2002, 572 (01) : 392 - 406
[3] Belloni T. M., 2012, MNRAS IN PRESS
[4] The ABC of low-frequency quasi-periodic oscillations in black hole candidates: Analogies with Z sources
Casella, P
Belloni, T
Stella, L
[J]. ASTROPHYSICAL JOURNAL, 2005, 629 (01) : 403 - 407
[5] IMPLICATIONS OF BURST OSCILLATIONS FROM THE SLOWLY ROTATING ACCRETING PULSAR IGR J17480-2446 IN THE GLOBULAR CLUSTER TERZAN 5
Cavecchi, Y.
Patruno, A.
Haskell, B.
Watts, A. L.
Levin, Y.
Linares, M.
Altamirano, D.
Wijnands, R.
van der Klis, M.
[J]. ASTROPHYSICAL JOURNAL LETTERS, 2011, 740 (01)
[6] Terzan 5 transient IGR J17480-2446: variation of burst and spectral properties with spectral states
Chakraborty, Manoneeta
Bhattacharyya, Sudip
Mukherjee, Arunava
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 418 (01) : 490 - 499
[7] Is there a link between the neutron-star spin and the frequency of the kilohertz quasi-periodic oscillations?
Endez, Mariano M.
Belloni, Tomaso
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 381 (02) : 790 - 796
[8] HASINGER G, 1989, ASTRON ASTROPHYS, V225, P79
[9] Modelling variability in black hole binaries: linking simulations to observations
Ingram, Adam
Done, Chris
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 419 (03) : 2369 - 2378
[10] A physical model for the continuum variability and quasi-periodic oscillation in accreting black holes
Ingram, Adam
Done, Chris
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 415 (03) : 2323 - 2335

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