PSR J1748-2021B is the most massive known pulsar, initially calculated with 2.74+0.21
−0.21 M☉. It was first discovered by Freire[1] using the Green Bank Telescope S band receiver and Pulsar Spigot Spectrometer in Terzan 5 of globular cluster M-5.[2]
| Event type | Neutron star, binary pulsar |
|---|---|
| Pulsar | |
| Date | March 2008 |
| Duration | 7514 and 4285 sec |
| Instrument | Green Bank Telescope |
| Constellation | Virgo |
| Right ascension | 17h 48m 52.9522s (287.2205342 d) |
| Declination | −20h 21m 38.90s (−20.360881 d) |
| Epoch | 2000 |
| Galactic coordinates | NGC 6440 |
| Distance | 223 pc |
| Source | SIMBAD |
| Remnant | 17 |
| Host | https://simbad.u-strasbg.fr/simbad/sim-ref?bibcode=2008ApJ...675..670F |
| Colour (B-V) | BRIGHT 2 |
| Peak apparent magnitude | 2.548 Solar mass |
| Other designations | NGC 6440B |
| Website | https://simbad.cds.unistra.fr/mobile/object.html?object_name=PSR%20J1748-2021B |
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A later estimate puts the mass as 2.548+0.047
−0.078 M☉.[3]
References
edit- ^ Freire, Paulo C. C.; Ransom, Scott M.; Bégin, Steve; Stairs, Ingrid H.; Hessels, Jason W. T.; Frey, Lucille H.; Camilo, Fernando (March 2008). "Eight New Millisecond Pulsars in NGC 6440 and NGC 6441". The Astrophysical Journal. 675 (1): 670–682. arXiv:0711.0925. doi:10.1086/526338. ISSN 0004-637X.
- ^ Kumar, Sandeep S.; Kenath, Arun; Sivaram, C. (2020-05-01). "Effects of dark matter on the upper bound mass of neutron stars". Physics of the Dark Universe. 28: 100507. doi:10.1016/j.dark.2020.100507. ISSN 2212-6864. S2CID 214343780.
- ^ Clifford, Nick (May 2019). Long-Term Timing of Pulsars in NGC 6440: An Updated Mass Limit of Millisecond Pulsar J1748-2021B (Thesis).
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