Khác biệt giữa các bản “Sao xung”

n (robot Thay: ml:പൾസാർ)
[[File:Vela Pulsar jet.jpg|nhỏ|Sao xung Vela]]
[[File:PSR B1509-58 full.jpg|nhỏ|PSR B1509-58]]
{{Đang dịch 2 (nguồn)|ngày=16
|1 = Tiếng Anh
*The first radio pulsar [[CP 1919]] (now known as [[PSR 1919+21]]), with a pulse period of 1.337 seconds and a pulse width of 0.04 second, was discovered in 1967.<ref>Hewish, A. ''et al.'' "[ Observation of a Rapidly Pulsating Radio Source]." ''Nature'', Volume 217, 1968 (pages 709-713).</ref> A drawing of this pulsar's radio waves was used as the cover of British [[post-punk]] band [[Joy Division]]'s debut album, ''[[Unknown Pleasures]]''.
*The first [[binary pulsar]], [[PSR 1913+16]], whose orbit is decaying at the exact rate predicted due to the emission of [[gravitational radiation]] by [[general relativity]]
*The first millisecond pulsar, [[PSR B1937+21]]
*The brightest millisecond pulsar, [[PSR J0437-4715]]
*The first X-ray pulsar, [[Cen X-3]]
*The first accreting millisecond X-ray pulsar, [[SAX J1808.4-3658]]
*The first pulsar with planets, [[PSR B1257+12]]
*The first double pulsar binary system, [[PSR J0737-3039|PSR J0737&minus;3039]]
*The longest period pulsar, [[PSR J2144-3933]]
*The most stable pulsar in period, [[PSR J0437-4715]]
*The magnetar [[SGR 1806-20]] produced the largest burst of power in the Galaxy ever experimentally recorded on 27 December 2004<ref>"[ Galactic Magnetar Throws Giant Flare]." ''Astronomy Picture of the Day,'' 21 February 2005.</ref>
*PSR B1931+24 "... appears as a normal pulsar for about a week and then 'switches off' for about one month before emitting pulses again. [..] this pulsar slows down more rapidly when the pulsar is on than when it is off. [.. the] braking mechanism must be related to the radio emission and the processes creating it and the additional slow-down can be explained by the [[pulsar wind]] leaving the pulsar's magnetosphere and carrying away rotational energy.<ref>"[ Part-Time Pulsar Yields New Insight Into Inner Workings of Cosmic Clocks]." Particle Physics and Astronomy Research Council, 3 March 2006.</ref>
*[[PSR J1748-2446ad]], at 716 Hz, the pulsar with the highest rotation speed.
*[[PSR J0108-1431]], the closest known pulsar to the Earth. It lies in the direction of the constellation [[Cetus (constellation)|Cetus]], at a distance of about 85 [[parsec]]s (280 [[light year]]s). Nevertheless, it was not discovered until 1993 due to its extremely low luminosity. It was discovered by the Danish astronomer Thomas Tauris.<ref>Tauris, T. M. ''et al.'' "[ Discovery of PSR J0108-1431: The Closest Known Neutron Star]?" ''Astrophysical Journal,'' Volume 428, 1994 (page L53).</ref> in collaboration with a team of Australian and European astronomers using the Parkes 64-meter radio telescope. The pulsar is 1000 times weaker than an average radio pulsar and thus this pulsar may represent the tip of an iceberg of a population of more than half a million such dim pulsars crowding our Milky Way.<ref>Crowsell, K. "[ Science: Dim Pulsars May Crowd Our Galaxy]." ''New Scientist,'' Number 1930, 18 June 2008. (page 16).</ref><ref>"[ Closest Pulsar]?" ''Sky & Telescope,'' October 1994 (page 14).</ref>
*[[PSR J1903+0327]], a ~2.15 ms pulsar discovered to be in a highly eccentric [[binary star]] system with a sun-like star.<ref>Champion, David J. ''et al.'' "[ An Eccentric Binary Millisecond Pulsar in the Galactic Plane]." ''Science,'' 6 June 2008 Volume 320, Number 5881 (pages 1309-1312).</ref>
* A pulsar in the CTA 1 [[supernova]] remnant (4U 0000+72, in [[Cassiopeia (constellation)|Cassiopeia]]) was found by the [[Fermi Gamma-ray Space Telescope]] to emit pulsations only in gamma ray radiation, the first of its kind.<ref name=Atkinson>Atkinson, Nancy. "[ Fermi Telescope Makes First Big Discovery: Gamma Ray Pulsar]." ''Universe Today,'' 17 October 2008.</ref>
==Ứng dụng==

lần sửa đổi