2011A&A...526L...3P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST23:04:23

2011A&A...526L...3P - Astronomy and Astrophysics, volume 526, L3-3 (2011/2-1)

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

PAPITTO A., D'AI A., MOTTA S., RIGGIO A., BURDERI L., DI SALVO T., BELLONI T. and IARIA R.

Abstract (from CDS):

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)M, indicating a companion star with a mass larger than 0.4M. The X-ray pulsar spins up while accreting at a rate of between 1.2 and 1.7x10–12Hz/s, 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 ∼2d 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 ∼2x108G and ∼2.4x1010G. 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.

Abstract Copyright:

Journal keyword(s): stars: neutron - stars: rotation - X-rays: binaries - pulsars: individual: IGR J17480-2446

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2EG J1746-2852 LXB 17 44 33.09 -28 44 27.0           ~ 484 0
2 IGR J17480-2446 LXB 17 48 04.831 -24 46 48.87           ~ 150 0
3 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 694 1
4 NAME TER 5 X-1 LXB 17 48 05.196 -24 46 47.40           ~ 190 1
5 V* V691 CrA LXB 18 25 46.8186056396 -37 06 18.529015318 14.30 15.20 15.1     ~ 400 0

    Equat.    Gal    SGal    Ecl

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2020.07.03-23:04:23

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