Timing Analysis of the 2022 Outburst of SAX J1808.4-3658: Hints of Orbital Decay - INSPIRE

DataBETA

Timing Analysis of the 2022 Outburst of SAX J1808.4-3658: Hints of Orbital Decay

Dec 19, 2022

11 pages

Published in:

Astrophys.J.Lett. 942 (2023) 2, L40

Published: Jan 17, 2023

e-Print:

2212.09778 [astro-ph.HE]

DOI:

10.3847/2041-8213/acad81

View in:

ADS Abstract Service

reference search13 citations

Citations per year

Abstract: (IOP)

We present a pulse timing analysis of NICER observations of the accreting millisecond X-ray pulsar SAX J1808.4−3658 during the outburst that started on 2022 August 19. Similar to previous outbursts, after decaying from a peak luminosity of ≃1 × 10

^{36}

erg s

^{−1}

in about a week, the pulsar entered a ∼1 month long reflaring stage. Comparison of the average pulsar spin frequency during the outburst with those previously measured confirmed the long-term spin derivative of Hz s

^{−1}

, compatible with the spin-down torque of a ≈10

^{26}

G cm

^{3}

rotating magnetic dipole. For the first time in the last twenty years, the orbital phase evolution shows evidence for a decrease of the orbital period. The long-term behavior of the orbit is dominated by an ∼11 s modulation of the orbital phase epoch consistent with a ∼21 yr period. We discuss the observed evolution in terms of a coupling between the orbit and variations in the mass quadrupole of the companion star.

Note:

11 pages, 3 figures, 1 table. Accepted for publication in ApJ Letters

References(73)

Figures(3)

Optical and ultraviolet pulsed emission from an accreting millisecond pulsar

F. Ambrosino
(
- Rome Observ. and
- INAF, Rome and
- Rome U.
)
,
A. Miraval Zanon
(
- Insubria U., Como and
- Brera Observ.
)
,
A. Papitto
(
- Rome Observ.
)
,
F. Coti Zelati
(
- Brera Observ. and
- ICE, Bellaterra and
- Barcelona, IEEC
)
,
S. Campana
(
- Brera Observ.
)

et al.

- Nature Astron. 5 (2021) 6, 552-559,
- Nature Astronomy (2021)
•
e-Print:
- 2102.11704
•
DOI:
- 10.1038/s41550-021-01308-0

Optical pulsations from a transitional millisecond pulsar

et al.

- Nature Astronomy (2017), published on-line on October 2, 2017,
- Nature Astron. 1 (2017) 12, 854-858
•
e-Print:
- 1709.01946
•
DOI:
- 10.1038/s41550-017-0266-2

J.H. Applegate

- Astrophys.J. 385 (1992) 621
•
DOI:
- 10.1086/170967

J.H. Applegate
,
J. Shaham

- Astrophys.J. 436 (1994) 312
•
DOI:
- 10.1086/174906

Accretion-powered pulsations in an apparently quiescent neutron star binary

et al.

- Astrophys.J. 807 (2015) 1, 62
•
e-Print:
- 1412.1306
•
DOI:
- 10.1088/0004-637X/807/1/62

ASP Conf. Ser. 101, Astronomical Data Analysis Software and Systems V

G.H. Jacoby
,
J. Barnes
,
K.A. Arnaud
,
G.H. Jacoby
,
J. Barnes

Orbital Variability in the Eclipsing Pulsar Binary PSR B1957+20

- Astrophys.J.Lett. 426 (1994) L85
•
e-Print:
- astro-ph/9312032
•
DOI:
- 10.1086/187346

Y. Avni

- Astrophys.J. 210 (1976) 642
•
DOI:
- 10.1086/154870

A brown dwarf companion for the accreting millisecond pulsar sax j1808.4-3658

- Astrophys.J. 557 (2001) 292
•
e-Print:
- astro-ph/0104153
•
DOI:
- 10.1086/321633

The Discovery of the 528.6 Hz Accreting Millisecond X-Ray Pulsar MAXI J1816–195

et al.

- Astrophys.J.Lett. 935 (2022) 2, L32
•
e-Print:
- 2208.04721
•
DOI:
- 10.3847/2041-8213/ac87f9

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

The Aperiodic X-ray Variability of the Accreting Millisecond Pulsar sax J1808.4−3658

- Astrophys.J. 806 (2015) 1, 90
•
e-Print:
- 1505.00596
•
DOI:
- 10.1088/0004-637X/806/1/90

The optical counterpart to sax j1808.4-3658 in quiescence: evidence of an active radio pulsar?

Luciano Burderi
(
- Rome Observ.
)
,
Tiziana Di Salvo
(
- Amsterdam U., Astron. Inst. and
- Palermo U.
)
,
Francesca D'Antona
(
- Rome Observ.
)
,
Natale R. Robba
(
- Palermo U.
)
,
Vincenzo Testa
(
- Rome Observ.
)

- Astron.Astrophys. 404 (2003) L43
•
e-Print:
- astro-ph/0305157
•
DOI:
- 10.1051/0004-6361:20030669

Timing an Accreting Millisecond Pulsar: Measuring the Accretion Torque in IGR J00291+5934

et al.

- Astrophys.J. 657 (2007) 961-966
•
e-Print:
- astro-ph/0611222
•
DOI:
- 10.1086/510659

Order in the Chaos: Spin-up and Spin-down during the 2002 Outburst of SAX J1808.4-3658

L. Burderi
(
- Cagliari U.
)
,
Tiziana Di Salvo
(
- Palermo U.
)
,
M.T. Menna
(
- Rome Observ.
)
,
A. Riggio
(
- Cagliari U. and
- Palermo U.
)
,
A. Papitto
(
- Rome Observ. and
- Rome U., Tor Vergata
)

- Astrophys.J.Lett. 653 (2006) L133-L136
•
e-Print:
- astro-ph/0612093
•
DOI:
- 10.1086/510666

Timing of the 2008 Outburst of SAX J1808.4-3658 with XMM-Newton: A Stable Orbital Period Derivative over Ten Years

et al.

- Astron.Astrophys. 496 (2009) L17
•
e-Print:
- 0902.2128
•
DOI:
- 10.1051/0004-6361/200811542

A search for pulsars in quiescent soft x-ray transients. 1.

Marta Burgay
(
- Bologna U.
)
,
L. Burderi
(
- Rome Observ.
)
,
A. Possenti
(
- Bologna Observ. and
- Cagliari Observ.
)
,
N. D'Amico
(
- Cagliari Observ. and
- Cagliari U.
)
,
R.N. Manchester
(
- Australia, CSIRO, Epping
)

et al.

- Astrophys.J. 589 (2003) 902-910
•
e-Print:
- astro-ph/0302128
•
DOI:
- 10.1086/374690

Spin-down rate of the transitional millisecond pulsar PSR J1023+0038 in the optical band with Aqueye+

et al.

- Mon.Not.Roy.Astron.Soc. 498 (2020) 1, L98-L103
•
e-Print:
- 2007.09980
•
DOI:
- 10.1093/mnrasl/slaa133

Indirect evidence for an active radio pulsar in the quiescent state of the transient MS pulsar SAX J1808.4-3658

et al.

- Astrophys.J.Lett. 614 (2004) L49-L52
•
e-Print:
- astro-ph/0408584
•
DOI:
- 10.1086/425495

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

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

Nuclear-powered millisecond pulsars and the maximum spin frequency of neutron stars

Deepto Chakrabarty
(
- MIT and
- MIT, MKI and
- Santa Barbara, KITP and
- St. Andrews U., Phys. Astron. and
- Amsterdam U., Astron. Inst. and
- Maryland U. and
- NASA, Goddard
)
,
Edward H. Morgan
(
- MIT and
- MIT, MKI and
- Santa Barbara, KITP and
- St. Andrews U., Phys. Astron. and
- Amsterdam U., Astron. Inst. and
- Maryland U. and
- NASA, Goddard
)
,
Michael P. Muno
(
- MIT and
- MIT, MKI and
- Santa Barbara, KITP and
- St. Andrews U., Phys. Astron. and
- Amsterdam U., Astron. Inst. and
- Maryland U. and
- NASA, Goddard
)
,
Duncan K. Galloway
(
- MIT and
- MIT, MKI and
- Santa Barbara, KITP and
- St. Andrews U., Phys. Astron. and
- Amsterdam U., Astron. Inst. and
- Maryland U. and
- NASA, Goddard
)
,
Rudy Wijnands
(
- MIT and
- MIT, MKI and
- Santa Barbara, KITP and
- St. Andrews U., Phys. Astron. and
- Amsterdam U., Astron. Inst. and
- Maryland U. and
- NASA, Goddard
)

et al.

- Nature 424 (2003) 42-44
•
e-Print:
- astro-ph/0307029
•
DOI:
- 10.1038/nature01732

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

SAX J1808.4−3658, an accreting millisecond pulsar shining in gamma rays?

et al.

- Mon.Not.Roy.Astron.Soc. 456 (2016) 3, 2647-2653
•
e-Print:
- 1511.05032
•
DOI:
- 10.1093/mnras/stv2695

J.E. Deeter
,
P.E. Boynton
,
S.H. Pravdo

- Astrophys.J. 247 (1981) 1003
•
DOI:
- 10.1086/159110

Orbital Evolution of an Accreting Millisecond Pulsar: Witnessing the Banquet of a Hidden Black Widow

T. Di Salvo
(
- Palermo U.
)
,
L. Burderi
(
- Cagliari U.
)
,
A. Riggio
(
- Cagliari U.
)
,
A. Papitto
(
- Rome Observ. and
- Rome U., Tor Vergata
)
,
M.T. Menna
(
- Rome Observ.
)

- Mon.Not.Roy.Astron.Soc. 389 (2008) 1851
•
e-Print:
- 0708.0498
•
DOI:
- 10.1111/j.1365-2966.2008.13709.x

1-25 of 73
1
2
3
25 / page