The optical companion to the binary millisecond pulsar J1824-2452H in the globular cluster M28

Abstract

We report on the optical identification of the companion star to the eclipsing millisecond pulsar PSR J1824-2452H in the galactic globular cluster M28 (NGC 6626). This star is at only 0.2" from the nominal position of the pulsar and it shows optical variability (~ 0.25 mag) that nicely correlates with the pulsar orbital period. It is located on the blue side of the cluster main sequence, ~1.5 mag fainter than the turn-off point. The observed light curve shows two distinct and asymmetric minima, suggesting that the companion star is suffering tidal distortion from the pulsar. This discovery increases the number of non-degenerate MSP companions optically identified so far in globular clusters (4 out of 7), suggesting that these systems could be a common outcome of the pulsar recycling process, at least in dense environments where they can be originated by exchange interactions.

accepted for publication on ApJ, 17 pages, 5 figures

References in corpus (5)

• A Radio Pulsar/X-ray Binary Link
• Formation and evolution of compact binaries in globular clusters: II. Binaries with neutron stars
• A Panchromatic Study of the Globular Cluster NGC 1904. I: The Blue Straggler Population
• A puzzling millisecond pulsar companion in NGC 6266
• X-Ray Binaries and the Current Dynamical States of Galactic Globular Clusters

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