|
|- style="vertical-align: top;" | Distance | 587.088 Ly (180 parsecs) PSR J2144-3933 is a pulsar about 180 parsecs (5.5 Em) from Earth. It was previously thought to have a period of 2.84 seconds but is now known to have a period of 8.51 s, which is among the longest known radio pulsar. J2144-3933 is notable for other reasons: its mean pulse profile is very narrow in comparison to the pulse period with a half-intensity width of less than one degree of longitude. It also has the lowest spindown luminosity of any pulsar at about 3×1021 watts. Writing in ''Nature'', astrophysicists M. D. Young and coworkers consider this object and suggest that its existence throws current theories into doubt. They state: :''Moreover, under the usual model assumptions, based on the neutron-star equations of state, this slowly rotating pulsar should not be emitting a radio beam. Therefore either the model assumptions are wrong, or current theories of radio emission must be revised'' ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「PSR J2144-3933」の詳細全文を読む スポンサード リンク
|