SGR J1745−2900

SGR J1745−2900, or PSR J1745−2900, is the first-discovered magnetar orbiting the black hole Sagittarius A*, in the center of the Milky Way.[1][2] The magnetar was discovered in 2013 using the Effelsberg 100-m Radio Telescope, the Nancay Decimetric Radio Telescope, and the Jodrell Bank Lovell Telescope. The magnetar has a period of 3.76 s and a magnetic flux density of ~ 1010 T (1014 G). The magnetar is 0.33 ly from the central black hole.

SGR J1745−2900

Image of SGR J1745−2900 produced by the Chandra X-ray Observatory
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 17h 45m 40.16s
Declination −29° 00' 29.8"'
Apparent magnitude (V)  ?
Database references
SIMBADdata
Other designations
PSR J1745−2900

The object offers an unparalleled tool for probing the ionized interstellar medium (ISM) toward the Galactic Center (GC),[3] and a possible way to test quantum gravity effects.[4]

References
  1. Kennea, J. A.; et al. (20 June 2013). "DISCOVERY OF A NEW SOFT GAMMA REPEATER, SGR J1745–29, NEAR SAGITTARIUS A*". The Astrophysical Journal. 770 (2): L24. arXiv:1305.2128. Bibcode:2013ApJ...770L..24K. doi:10.1088/2041-8205/770/2/L24. S2CID 119254466.
  2. Mori, Kaya; et al. (20 June 2013). "DISCOVERY OF A 3.76 s TRANSIENT MAGNETAR NEAR SAGITTARIUS A*". The Astrophysical Journal. 770 (2): L23. arXiv:1305.1945. Bibcode:2013ApJ...770L..23M. doi:10.1088/2041-8205/770/2/L23. S2CID 6803966.
  3. Eatough, R. P.; et al. (14 August 2013). "A strong magnetic field around the supermassive black hole at the centre of the Galaxy". Nature. 501 (7467): 391–394. arXiv:1308.3147. Bibcode:2013Natur.501..391E. doi:10.1038/nature12499. PMID 23945588. S2CID 4448706.
  4. Pen, U.-L.; Broderick, A. E. (29 October 2014). "Possible astrophysical observables of quantum gravity effects near black holes". Monthly Notices of the Royal Astronomical Society. 445 (4): 3370–3373. arXiv:1312.4017. Bibcode:2014MNRAS.445.3370P. doi:10.1093/mnras/stu1919.


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