The spin and orbit of the newly discovered pulsar IGR J17480-2446

Tiziana Di Salvo, Rosario Iaria, Burderi, Papitto, Iaria, D'Aì, Riggio

Risultato della ricerca: Article

11 Citazioni (Scopus)

Abstract

We present an analysis of the spin and orbital properties of the newly discovered accreting pulsar IGR J17480-2446, located in the globular cluster Terzan 5. Considering the pulses detected by the Rossi X-ray Timing Explorer at a period of 90.539645(2) ms, we derive a solution for the 21.27454(8) hr binary system. The binary mass function is estimated to be 0.021275(5) Mȯ, indicating a companion star with a mass larger than 0.4 Mȯ. The X-ray pulsar spins up while accreting at a rate of between 1.2 and 1.7 × 10-12 Hz s-1, in agreement with the accretion of disc matter angular momentum given the observed luminosity. We also report the detection of pulsations at the spin period of the source during a Swift observation performed ~2 d before the beginning of the RXTE coverage. Assuming that the inner disc radius lies in between the neutron star radius and the corotation radius while the source shows pulsations, we estimate the magnetic field of the neutron star to be within ~ 2 × 108 G and ~ 2.4 × 1010 G. From this estimate, the value of the spin period and of the observed spin-up rate, we associate this source with the still poorly sampled population of slow, mildly recycled, accreting pulsars.
Lingua originaleEnglish
pagine (da-a)-
Numero di pagine5
RivistaASTRONOMY & ASTROPHYSICS
Volume526
Stato di pubblicazionePublished - 2011

Fingerprint

pulsars
orbits
angular momentum
X Ray Timing Explorer
accretion
neutron stars
radii
magnetic field
companion stars
corotation
estimates
globular clusters
luminosity
rate
orbitals
pulses
magnetic fields
x rays
analysis
detection

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

The spin and orbit of the newly discovered pulsar IGR J17480-2446. / Di Salvo, Tiziana; Iaria, Rosario; Burderi; Papitto; Iaria; D'Aì; Riggio.

In: ASTRONOMY & ASTROPHYSICS, Vol. 526, 2011, pag. -.

Risultato della ricerca: Article

Di Salvo, Tiziana ; Iaria, Rosario ; Burderi ; Papitto ; Iaria ; D'Aì ; Riggio. / The spin and orbit of the newly discovered pulsar IGR J17480-2446. In: ASTRONOMY & ASTROPHYSICS. 2011 ; Vol. 526. pagg. -.
@article{9671f41f11774d4994e20461bfe5d9f0,
title = "The spin and orbit of the newly discovered pulsar IGR J17480-2446",
abstract = "We present an analysis of the spin and orbital properties of the newly discovered accreting pulsar IGR J17480-2446, located in the globular cluster Terzan 5. Considering the pulses detected by the Rossi X-ray Timing Explorer at a period of 90.539645(2) ms, we derive a solution for the 21.27454(8) hr binary system. The binary mass function is estimated to be 0.021275(5) Mȯ, indicating a companion star with a mass larger than 0.4 Mȯ. The X-ray pulsar spins up while accreting at a rate of between 1.2 and 1.7 × 10-12 Hz s-1, in agreement with the accretion of disc matter angular momentum given the observed luminosity. We also report the detection of pulsations at the spin period of the source during a Swift observation performed ~2 d before the beginning of the RXTE coverage. Assuming that the inner disc radius lies in between the neutron star radius and the corotation radius while the source shows pulsations, we estimate the magnetic field of the neutron star to be within ~ 2 × 108 G and ~ 2.4 × 1010 G. From this estimate, the value of the spin period and of the observed spin-up rate, we associate this source with the still poorly sampled population of slow, mildly recycled, accreting pulsars.",
keywords = "stars neutron, stars rotation, X-rays binaries, pulsars individual IGR J17480-2446",
author = "{Di Salvo}, Tiziana and Rosario Iaria and Burderi and Papitto and Iaria and D'A{\`i} and Riggio",
year = "2011",
language = "English",
volume = "526",
pages = "--",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

TY - JOUR

T1 - The spin and orbit of the newly discovered pulsar IGR J17480-2446

AU - Di Salvo, Tiziana

AU - Iaria, Rosario

AU - Burderi, null

AU - Papitto, null

AU - Iaria, null

AU - D'Aì, null

AU - Riggio, null

PY - 2011

Y1 - 2011

N2 - We present an analysis of the spin and orbital properties of the newly discovered accreting pulsar IGR J17480-2446, located in the globular cluster Terzan 5. Considering the pulses detected by the Rossi X-ray Timing Explorer at a period of 90.539645(2) ms, we derive a solution for the 21.27454(8) hr binary system. The binary mass function is estimated to be 0.021275(5) Mȯ, indicating a companion star with a mass larger than 0.4 Mȯ. The X-ray pulsar spins up while accreting at a rate of between 1.2 and 1.7 × 10-12 Hz s-1, in agreement with the accretion of disc matter angular momentum given the observed luminosity. We also report the detection of pulsations at the spin period of the source during a Swift observation performed ~2 d before the beginning of the RXTE coverage. Assuming that the inner disc radius lies in between the neutron star radius and the corotation radius while the source shows pulsations, we estimate the magnetic field of the neutron star to be within ~ 2 × 108 G and ~ 2.4 × 1010 G. From this estimate, the value of the spin period and of the observed spin-up rate, we associate this source with the still poorly sampled population of slow, mildly recycled, accreting pulsars.

AB - We present an analysis of the spin and orbital properties of the newly discovered accreting pulsar IGR J17480-2446, located in the globular cluster Terzan 5. Considering the pulses detected by the Rossi X-ray Timing Explorer at a period of 90.539645(2) ms, we derive a solution for the 21.27454(8) hr binary system. The binary mass function is estimated to be 0.021275(5) Mȯ, indicating a companion star with a mass larger than 0.4 Mȯ. The X-ray pulsar spins up while accreting at a rate of between 1.2 and 1.7 × 10-12 Hz s-1, in agreement with the accretion of disc matter angular momentum given the observed luminosity. We also report the detection of pulsations at the spin period of the source during a Swift observation performed ~2 d before the beginning of the RXTE coverage. Assuming that the inner disc radius lies in between the neutron star radius and the corotation radius while the source shows pulsations, we estimate the magnetic field of the neutron star to be within ~ 2 × 108 G and ~ 2.4 × 1010 G. From this estimate, the value of the spin period and of the observed spin-up rate, we associate this source with the still poorly sampled population of slow, mildly recycled, accreting pulsars.

KW - stars neutron, stars rotation, X-rays binaries, pulsars individual IGR J17480-2446

UR - http://hdl.handle.net/10447/52701

UR - http://adsabs.harvard.edu/abs/2011A%26A...526L...3P

M3 - Article

VL - 526

SP - -

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

ER -