SIMBAD references

2021MNRAS.503L..51M - Mon. Not. R. Astron. Soc., 503, L51-L55 (2021/May-1)

A 2-d orbital period for a redback millisecond pulsar candidate in the globular cluster NGC 6397.

MARCANO M.P., RIVERA SANDOVAL L.E., MACCARONE T.J., ZHAO Y. and HEINKE C.O.

Abstract (from CDS):

We report optical modulation of the companion to the X-ray source U18 in the globular cluster NGC 6397. U18, with combined evidence from radio and X-ray measurements, is a strong candidate as the second redback in this cluster, initially missed in pulsar searches. This object is a bright variable star with an anomalous red colour and optical variability (∼0.2 mag in amplitude) with a periodicity ∼1.96 d that can be interpreted as the orbital period. This value corresponds to the longest orbital period for known redback candidates and confirmed systems in Galactic globular clusters and one of the few with a period longer than 1 d.

Journal keyword(s): globular clusters: general - globular clusters: individual: (NGC 6397) - X-rays: binaries pulsars

Simbad objects: 9

Full paper

View the references in ADS

To bookmark this query, right click on this link: simbad:2021MNRAS.503L..51M and select 'bookmark this link' or equivalent in the popup menu