Astronomy:PSR J1748−2021B
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Short description: Pulsar binary with white dwarf
| Other designations | NGC 6440B |
|---|---|
| Event type | Neutron star, binary pulsar |
| Spectral class | Pulsar |
| Date | March 2008 |
| Duration | 7,514 and 4,285 sec. |
| Instrument | Green Bank Telescope |
| Constellation | Sagittarius[1] |
| Right ascension | 17h 48m 52.9522s (287.2205342°) |
| Declination | −20° 21′ 38.90″ (−20.360881°) |
| 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 masses |
| Website | https://simbad.cds.unistra.fr/mobile/object.html?object_name=PSR%20J1748-2021B |
 Related media on Wikimedia Commons | |
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[2] using the Green Bank Telescope S-band receiver and Pulsar Spigot Spectrometer in Terzan 5 of globular cluster Messier 5.[3]
A later estimate puts the mass as 2.548+0.047
−0.078 M☉.[4]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 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. doi:10.1086/526338. ISSN 0004-637X. Bibcode: 2008ApJ...675..670F. https://iopscience.iop.org/article/10.1086/526338.
- ↑ 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. doi:10.1016/j.dark.2020.100507. ISSN 2212-6864. Bibcode: 2020PDU....2800507K. https://www.sciencedirect.com/science/article/pii/S2212686419303607.
- ↑ 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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