QSO B0839+187
| QSO B0839+187 | |
|---|---|
| Observation data (Epoch J2000) | |
| Constellation | Cancer |
| Right ascension | 08h 42m 05.0942s |
| Declination | +18° 35′ 40.991″ |
| Redshift | 1.27[1][2] |
| Distance | 8.4 billion light-years (Light travel time)[2] |
| Type | Rad |
| Apparent magnitude (V) | 16.36 |
| Other designations | |
| LEDA 2825583, PKS J0842+1835, PKS 0839+187, 2MASS J08420509+1835411, QSO B0839+1846 | |
| See also: Quasar, List of quasars | |
QSO B0839+187 (PKS 0839+187) is a quasar[1] that was used for a VLBI experiment conducted by Edward Fomalont and Sergei Kopeikin in September 2002. They claimed to measure the speed of gravity, but this is disputed.[3][4][5]
References
[edit]- ^ a b Simbad
- ^ a b "NASA/IPAC Extragalactic Database". Results for 0839+1846. Retrieved 2010-04-20.
- ^ Fomalont, Ed & Kopeikin, Sergei (2003). "The measurement of the light deflection from Jupiter: Experimental results". The Astrophysical Journal. 598 (1): 704–711. arXiv:astro-ph/0302294. Bibcode:2003ApJ...598..704F. doi:10.1086/378785. S2CID 14002701.
- ^ Asada, Hideki (2002). "Light cone effect and the Shapiro time delay". The Astrophysical Journal Letters. 574 (1): L69–L70. arXiv:astro-ph/0206266. Bibcode:2002ApJ...574L..69A. doi:10.1086/342369. S2CID 14589086.
- ^ Stuart Samuel (2003). "On the Speed of Gravity and the v/c Corrections to the Shapiro Time Delay". Physical Review Letters. 90 (23): 231101. arXiv:astro-ph/0304006. Bibcode:2003PhRvL..90w1101S. doi:10.1103/PhysRevLett.90.231101. PMID 12857246. S2CID 15905017.
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