Astronomy:PSR J2222−0137

From HandWiki

PSR J2222−0137 is a nearby intermediate-mass binary pulsar at a distance of 267+1.2
pc (approximately 870 light-years),[1] whose low-mass neutron star's companion is a white dwarf (PSR J2222−0137 B). The white dwarf has a relatively large mass of 1.319 ± 0.004 M[2] and a temperature less than 3,000 K,[1] meaning it is likely crystallized, leading to this Earth-sized white dwarf being described as a "diamond-star".[3]


  1. 1.0 1.1 Kaplan, David L.; Boyles, Jason; Dunlap, Bart H.; Tendulkar, Shriharsh P.; Deller, Adam T.; Ransom, Scott M.; McLaughlin, Maura A.; Lorimer, Duncan R. et al. (2014). "A 1.05MCompanion to PSR J2222–0137: The Coolest Known White Dwarf?". The Astrophysical Journal 789 (2): 119. doi:10.1088/0004-637X/789/2/119. ISSN 0004-637X. Bibcode2014ApJ...789..119K. 
  2. Guo, Y. J.; Freire, P. C. C.; Guillemot, L.; Kramer, M.; Zhu, W. W.; Wex, N.; McKee, J. W.; Deller, A. et al. (2021). "PSR J2222−0137. I. Improved physical parameters for the system". Astronomy & Astrophysics 654: A16. doi:10.1051/0004-6361/202141450. Bibcode2021A&A...654A..16G. 
  3. Drake, Nadia (24 June 2014). "Astronomers Find Slow-Cooked Diamond the Size of Earth". National Geographic.