PSR J0740+6620
One of the most massive neutron stars known.
via Wikipedia: PSR J0740+6620 · see source
PSR J0740+6620 is a millisecond pulsar in a binary with a white dwarf, about 4,600 light-years away. It was discovered in 2019 with the Green Bank Telescope and spins once every 2.8857 milliseconds.
Its mass, measured through the Shapiro delay of its companion's signal, puts it among the most massive neutron stars known, near the theoretical limit. It held the record until July 2022, when PSR J0952-0607 overtook it.
Quick Facts
- Type
- Millisecond pulsar
- Companion
- White dwarf
- Distance
- ~4,600 light-years
- Spin period
- 2.8857 ms
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