Long-term evolution of RRAT J1819-1458

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Gençali, Ali Arda and Ertan, Ünal (2018) Long-term evolution of RRAT J1819-1458. Monthly Notices of the Royal Astronomical Society, 481 (1). pp. 244-249. ISSN 0035-8711 (Print) 1365-2966 (Online)

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Abstract

At present, J1819-1458 is the only rotating radio transient (RRAT) detected in X-rays. We have studied the long-term evolution of this source in the fallback disc model. The model can reproduce the period, period derivative, and X-ray luminosity of J1819-1458 simultaneously in the accretion phase at ages similar to 2 x 10(5) yr. We obtained reasonable model curves with a magnetic dipole field strength B-0 similar to 5 x 10(11) G on the pole of the neutron star, which is much weaker than the field inferred from the dipole-torque formula. With this B-0 and the measured period, we find J1819-1458 below and close to the radio pulsar death line. Our results are not sensitive to initial period, and the source properties can be produced with a large range of disc masses. Our simulations indicate that J1819-1458 is evolving towards the properties of dim isolated neutron stars at later phases of evolution. This implies a close evolutionary link between RRATs and dim isolated neutron stars. For other RRATs with measured period derivatives and unknown X-ray luminosities, we have estimated the lower limits on the B-0 values in the fallback disc model. These limits allow a dipole field distribution for RRATs that could fill the B-0 gap between the estimated B-0 ranges of dim thermal isolated neutron stars and central compact objects in the same model.
Item Type: Article
Uncontrolled Keywords: accretion, accretion discs; stars: neutron; pulsars: individual: RRAT J1819-1458
Subjects: Q Science > QB Astronomy > QB460-466 Astrophysics
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Ünal Ertan
Date Deposited: 07 Jan 2019 10:53
Last Modified: 26 Apr 2022 10:01
URI: https://research.sabanciuniv.edu/id/eprint/36704

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