PSR J1748-2446ad

Starbox begin
name=PSR J1748-2446adStarbox observe
epoch=J2000
ra=17h 48m
dec= −24° 48'
appmag_v=5.28
constell=Sagittarius Starbox character
class=Pulsar
b-v=?
u-b=?
variable=None
-! style="background-color: #FFFFC0;" colspan="2" | Astrometry
- style="vertical-align: top;"
Distance
18.000 Ly [cite journal |doi=10.1051/0004-6361:20066628 |title=Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1, and Terzan 4 based on HST NICMOS photometry |year=2007 |author=Ortolani, S. |journal=Astronomy and Astrophysics |volume=470 |pages=1043 arxiv|0705.4030] Starbox detail
mass= ?
radius= <16 km
luminosity=?
temperature=?
metal=?
rotation=0.00139595482(6) s
age=? Starbox reference
Simbad=PSR+J1748-2446ad

PSR J1748-2446ad is the fastest-spinning known pulsar, at 716 Hz, the period being 0.00139595482(6) seconds. The previous record was held by PSR B1937+21, discovered in 1982, spinning at 642 Hz.

This pulsar was discovered by Jason W. T. Hessels of McGill University on November 10, 2004 and confirmed on January 8, 2005.

Scientists' calculation assume that the neutron star contains slightly less than two times the mass of the Sun, which is approximately the same for all neutron stars. Its radius is constrained to be less than 16 km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000 km per second.

The pulsar is located in a globular cluster of stars called Terzan 5, located approximately 18,000 light-years from Earth in the constellation Sagittarius. It is part of a binary system and undergoes regular eclipses with an eclipse fraction of about 40%. Its orbit is highly circular with a 26 hour period and a radius of 4–5 earth radii. The other object is about 0.14 solar masses, with a radius of 5–6 solar radii. Hessels states that the companion may be a "bloated main-sequence star, possibly still filling its Roche Lobe".

Hessels goes on to speculate that gravitational radiation from the pulsar might be detectable by LIGO.

References

* | month=Mar | author=Hessels, J. W.; Ransom, S. M.; Stairs, I. H.; Freire, P. C.; Kaspi, V. M.; Camilo, F. | title=A radio pulsar spinning at 716 Hz | issue=5769 | pmid=16410486