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キーワード:
Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
要旨:
We report the discovery of 13 new pulsars in the globular cluster NGC 1851 by
the TRAPUM Large Survey Project using the MeerKAT radio telescope. The
discoveries consist of six isolated millisecond pulsars (MSPs) and seven binary
pulsars, of which six are MSPs and one is mildly recycled. For all the pulsars,
we present the basic kinematic, astrometric, and orbital parameters, where
applicable, as well as their polarimetric properties, when these are
measurable. Two of the binary MSPs (PSR J0514-4002D and PSR J0514-4002E) are in
wide and extremely eccentric (e > 0.7) orbits with a heavy white dwarf and a
neutron star as their companion, respectively. With these discoveries, NGC 1851
is now tied with M28 as the cluster with the third largest number of known
pulsars (14). Its pulsar population shows remarkable similarities with that of
M28, Terzan 5 and other clusters with comparable structural parameters. The
newly-found pulsars are all located in the innermost regions of NGC 1851 and
will likely enable, among other things, detailed studies of the cluster
structure and dynamics.
