Evolution of redback radio pulsars in globular clusters
arXiv:1612.01317 · doi:10.1051/0004-6361/201628692
Abstract
We study the evolution of close binary systems composed of a normal, intermediate mass star and a neutron star considering a chemical composition typical of that present in globular clusters (Z = 0.001). We look for similarities and differences with respect to solar composition donor stars, which we have extensively studied in the past. As a definite example, we perform an application on one of the redbacks located in a globular cluster. We performed a detailed grid of models in order to find systems that represent the so-called redback binary radio pulsar systems with donor star masses between 0.6 and 2.0 solar masses and orbital periods in the range 0.2 - 0.9 days. We find that the evolution of these binary systems is rather similar to those corresponding to solar composition objects, allowing us to account for the occurrence of redbacks in globular clusters, as the main physical ingredient is the irradiation feedback. Redback systems are in the quasi-RLOF state, that is, almost filling their corresponding Roche lobe. During the irradiation cycle the system alternates between semi-detached and detached states. While detached the system appears as a binary millisecond pulsar, called a redback. Circumstellar material, as seen in redbacks, is left behind after the previous semi-detached phase. The evolution of binary radio pulsar systems considering irradiation successfully accounts for, and provides a way for, the occurrence of redback pulsars in low-metallicity environments such as globular clusters. This is the case despite possible effects of the low metal content of the donor star that could drive systems away from redback configuration.
arXiv comment7 pages, 3 figures, 1 table. Accepted for publication in A&A
References in corpus (27)
- Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
- The disc instability model of dwarf-novae and low-mass X-ray binary transients
- Swings between rotation and accretion power in a millisecond binary pulsar
- GALEV evolutionary synthesis models - I. Code, input physics and web-interface
- A state change in the missing link binary pulsar system PSR J1023+0038
- Formation of black widows and redbacks -- two distinct populations of eclipsing binary millisecond pulsars
- Intra-Binary Shock Heating of Black Widow Companions
- Where May Ultra-Fast Rotating Neutron Stars Be Hidden?
- The bright optical companion to the eclipsing millisecond pulsar in NGC 6397
- Understanding the evolution of close binary systems with radio pulsars
- Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1 and Terzan 4 based on HST NICMOS photometry
- Evolutionary trajectories of ultra-compact "black widow" pulsars with very low mass companions
- PSR J1723-2837: An Eclipsing Binary Radio Millisecond Pulsar
- Long-term evolution of compact binaries with irradiation feedback
- High resolution infrared spectra of NGC 6440 and NGC 6441: two massive Bulge Globular Clusters
- The formation of multiple populations in the globular cluster 47 Tuc
- Chemical and kinematical properties of BSSs and HB stars in NGC 6397
- A Code for Stellar Binary Evolution and its Application to the Formation of Helium White Dwarfs
- A Millisecond Pulsar Optical Counterpart with Large-Amplitude Variability in the Globular Cluster 47 Tucanae
- Chemical abundances in bright giants of the globular cluster M62 (NGC 6266)
- The optical companion to the binary millisecond pulsar J1824-2452H in the globular cluster M28
- The eclipsing millisecond pulsar PSR J1740-5340 and its red straggler companion
- A puzzling millisecond pulsar companion in NGC 6266
- The Quasi-Roche lobe overflow state in the evolution of Close Binary Systems containing a radio pulsar
- Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry
- Identification of the Optical Counterpart of Fermi Black Widow Millisecond Pulsar PSR J1544+4937
- Formation of redbacks via accretion induced collapse