Updated Spin and Orbital Parameters and Energy Dependent Pulse Behaviors of the Accreting Millisecond X-ray Pulsar IGR J17591$-$2342

Tse, Kaho; Chou, Yi; Hsieh, Hung-En

doi:10.3847/1538-4357/aba18f

Updated Spin and Orbital Parameters and Energy Dependent Pulse Behaviors of the Accreting Millisecond X-ray Pulsar IGR J17591 $-$ 2342

Sep 12, 2020

20 pages

Published in:

Astrophys.J. 899 120

e-Print:

2009.05899 [astro-ph.HE]

DOI:

10.3847/1538-4357/aba18f (publication)

Report number:

ApJ 889 (2020) 120

View in:

ADS Abstract Service

pdf

reference search1 citation

Citations per year

Abstract: (arXiv)

We present our works in updating the spin and orbital parameters for the newly discovered accreting millisecond X-ray pulsar (AMXP) IGR J17591

-

2342 through pulsar timing and analyzing its energy dependent pulse behaviors. The data being analyzed were collected by Neutron Star Interior Composition ExploreR (NICER) that observed this AMXP from August to October 2018. Using the pulse arrival time delay technique, more accurate spin and orbital parameters were evaluated. From the measured spin frequency derivative, it is estimated that the magnetic field of the neutron star in IGR J17591

-

2342 is approximately

4 \times 10^{8}

G. Precise pulse profiles can be made using the updated spin and orbital parameters. The soft phase lag phenomenon that is usually seen in other AMXPs is also observed from

\sim

4 keV to 12 keV with a value of 0.06 cycles (1.14

\mu

s). Additionally, the pulsed fractional amplitude increases from 1 to

\sim

5 keV and then decreases for higher energy bands. We found that these phenomena, as well as the energy spectrum, can be explained by the two-component model with a relatively strong blackbody component and an additional unpulsed disk blackbody component.

Note:

20 pages, 9 figures, 2 tables

References(11)

Figures(9)

Arnaud, K. A. 1996, Astronomical Data Analysis Software and Systems V, 17 Bozzo, E., Ducci, L., Ferrigno, C., et al

M.A. Alpar
,
A.F. Cheng
,
M.A. Ruderman
,
J. Shaham

- Nature 300 (1982) 728

Timing the Pulsations of the Accreting Millisecond Pulsar SAX J1808.4–3658 during Its 2019 Outburst

Peter Bult
(
- NASA, Goddard
)
,
Deepto Chakrabarty
(
- MIT, MKI
)
,
Zaven Arzoumanian
(
- NASA, Goddard
)
,
Keith C. Gendreau
(
- NASA, Goddard
)
,
Sebastien Guillot
(
- IRAP, Toulouse and
- CNES, Toulouse
)

et al.

- Astrophys.J. 898 (2020) 1, 38
•
e-Print:
- 1910.03062
•
DOI:
- 10.3847/1538-4357/ab9827

On the Curious Pulsation Properties of the Accreting Millisecond Pulsar IGR J17379–3747

Peter Bult
(
- NASA, Goddard
)
,
Craig B. Markwardt
(
- NASA, Goddard
)
,
Diego Altamirano
(
- Southampton U.
)
,
Zaven Arzoumanian
(
- NASA, Goddard
)
,
Deepto Chakrabarty
(
- MIT
)

et al.

- Astrophys.J. 877 (2019) 2, 70
•
e-Print:
- 1904.11311
•
DOI:
- 10.3847/1538-4357/ab1b26

The two-hour orbit of a binary millisecond x-ray pulsar

- Nature 394 (1998) 346
•
e-Print:
- astro-ph/9804248
•
DOI:
- 10.1038/28561

Precise Orbital Parameters and Anomalous Phase Variations of the Accretion-powered Millisecond Pulsar XTE J1807-294

- Astrophys.J. 678 (2008) 1316
•
e-Print:
- 0801.0909
•
DOI:
- 10.1086/529126

Soft phase lags of pulsed emission from the millisecond x-ray pulsar sax j1808.4-3658

- Astrophys.J.Lett. 504 (1998) L27
•
e-Print:
- astro-ph/9807081
•
DOI:
- 10.1086/311569

The transitional millisecond pulsar IGR J18245-2452 during its 2013 outburst at X-rays and soft gamma-rays

et al.

- Astron.Astrophys. 603 (2017) A16
•
e-Print:
- 1704.04181
•
DOI:
- 10.1051/0004-6361/201730600

The energy dependence of burst oscillations from the accreting millisecond pulsar XTE J1814-338

- Mon.Not.Roy.Astron.Soc. 373 (2006) 769
•
e-Print:
- astro-ph/0607420
•
DOI:
- 10.1111/j.1365-2966.2006.11072.x

Wijnands, R., & van

M. der Klis

- Nature 394 (1998) 344

[10]

Figure 1. The 1-12 keV X-ray light curve detected by NICER with a bin size of 100 s. The arrows indicate the start times of two re-brightenings on MJD 58348 and MJD58366. No pulsation can be detected from the data collected after MJD58400 (i.e.October observations) so these data were excluded from the analysis of this work

IGR J17591-2342 11

Updated Spin and Orbital Parameters and Energy Dependent Pulse Behaviors of the Accreting Millisecond X-ray Pulsar IGR J17591−-−2342

Citations per year

Timing the Pulsations of the Accreting Millisecond Pulsar SAX J1808.4–3658 during Its 2019 Outburst

On the Curious Pulsation Properties of the Accreting Millisecond Pulsar IGR J17379–3747

The two-hour orbit of a binary millisecond x-ray pulsar

Precise Orbital Parameters and Anomalous Phase Variations of the Accretion-powered Millisecond Pulsar XTE J1807-294

Soft phase lags of pulsed emission from the millisecond x-ray pulsar sax j1808.4-3658

The transitional millisecond pulsar IGR J18245-2452 during its 2013 outburst at X-rays and soft gamma-rays

The energy dependence of burst oscillations from the accreting millisecond pulsar XTE J1814-338

Updated Spin and Orbital Parameters and Energy Dependent Pulse Behaviors of the Accreting Millisecond X-ray Pulsar IGR J17591 $-$ 2342