Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Crab_Pulsar> ?p ?o }
- Crab_Pulsar abstract "The Crab Pulsar (PSR B0531+21) is a relatively young neutron star. The star is the central star in the Crab Nebula, a remnant of the supernova SN 1054, which was widely observed on Earth in the year 1054. Discovered in 1968, the pulsar was the first to be connected with a supernova remnant.The Crab Pulsar is one of very few pulsars to be identified optically. The optical pulsar is roughly 20 km in diameter and the pulsar \"beams\" rotate once every 33 milliseconds, or 30 times each second. The outflowing relativistic wind from the neutron star generates synchrotron emission, which produces the bulk of the emission from the nebula, seen from radio waves through to gamma rays. The most dynamic feature in the inner part of the nebula is the point where the pulsar's equatorial wind slams into the surrounding nebula, forming a termination shock. The shape and position of this feature shifts rapidly, with the equatorial wind appearing as a series of wisp-like features that steepen, brighten, then fade as they move away from the pulsar into the main body of the nebula. The period of the pulsar's rotation is slowing by 38 nanoseconds per day due to the large amounts of energy carried away in the pulsar wind.The Crab Nebula is often used as a calibration source in X-ray astronomy. It is very bright in X-rays and the flux density and spectrum are known to be constant, with the exception of the pulsar itself. The pulsar provides a strong periodic signal that is used to check the timing of the X-ray detectors. In X-ray astronomy, 'crab' and 'millicrab' are sometimes used as units of flux density. A millicrab corresponds to a flux density of about 2.4x10−11 erg s−1 cm−2 (2.4x10−14 W m−2) in the 2–10 keV X-ray band, for a \"crab-like\" X-ray spectrum, which is roughly a powerlaw in photon energy, I(E)=9.5 E−1.1.Very few X-ray sources ever exceed one crab in brightness.".
- Crab_Pulsar thumbnail Chandra-crab.jpg?width=300.
- Crab_Pulsar wikiPageID "1232763".
- Crab_Pulsar wikiPageLength "14594".
- Crab_Pulsar wikiPageOutDegree "49".
- Crab_Pulsar wikiPageRevisionID "696924511".
- Crab_Pulsar wikiPageWikiLink Category:Crab_Nebula.
- Crab_Pulsar wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
- Crab_Pulsar wikiPageWikiLink Category:Optical_pulsars.
- Crab_Pulsar wikiPageWikiLink Category:Pulsars.
- Crab_Pulsar wikiPageWikiLink Category:Taurus_(constellation).
- Crab_Pulsar wikiPageWikiLink Chandra_X-ray_Observatory.
- Crab_Pulsar wikiPageWikiLink Crab_Nebula.
- Crab_Pulsar wikiPageWikiLink Doppler_effect.
- Crab_Pulsar wikiPageWikiLink Electromagnetic_spectrum.
- Crab_Pulsar wikiPageWikiLink Electronvolt.
- Crab_Pulsar wikiPageWikiLink Erg.
- Crab_Pulsar wikiPageWikiLink Flux.
- Crab_Pulsar wikiPageWikiLink Fourth_Cambridge_Survey.
- Crab_Pulsar wikiPageWikiLink Gamma_ray.
- Crab_Pulsar wikiPageWikiLink Gravitational_wave.
- Crab_Pulsar wikiPageWikiLink Green_Bank_Telescope.
- Crab_Pulsar wikiPageWikiLink Heliosphere.
- Crab_Pulsar wikiPageWikiLink Hubble_Space_Telescope.
- Crab_Pulsar wikiPageWikiLink Jocelyn_Bell_Burnell.
- Crab_Pulsar wikiPageWikiLink LIGO.
- Crab_Pulsar wikiPageWikiLink Millisecond.
- Crab_Pulsar wikiPageWikiLink Nanosecond.
- Crab_Pulsar wikiPageWikiLink Neutron_star.
- Crab_Pulsar wikiPageWikiLink New_General_Catalogue.
- Crab_Pulsar wikiPageWikiLink Optical_pulsar.
- Crab_Pulsar wikiPageWikiLink PSR_B1919+21.
- Crab_Pulsar wikiPageWikiLink Radio_wave.
- Crab_Pulsar wikiPageWikiLink Rudolph_Minkowski.
- Crab_Pulsar wikiPageWikiLink SN_1054.
- Crab_Pulsar wikiPageWikiLink Second_Cambridge_Catalogue_of_Radio_Sources.
- Crab_Pulsar wikiPageWikiLink Supernova.
- Crab_Pulsar wikiPageWikiLink Supernova_remnant.
- Crab_Pulsar wikiPageWikiLink Synchrotron_radiation.
- Crab_Pulsar wikiPageWikiLink Taurus_(constellation).
- Crab_Pulsar wikiPageWikiLink The_Astrophysical_Journal.
- Crab_Pulsar wikiPageWikiLink Third_Cambridge_Catalogue_of_Radio_Sources.
- Crab_Pulsar wikiPageWikiLink Twinkling.
- Crab_Pulsar wikiPageWikiLink Vela_Pulsar.
- Crab_Pulsar wikiPageWikiLink Walter_Baade.
- Crab_Pulsar wikiPageWikiLink Watt.
- Crab_Pulsar wikiPageWikiLink X-ray.
- Crab_Pulsar wikiPageWikiLink X-ray_astronomy.
- Crab_Pulsar wikiPageWikiLink File:Chandra-crab.jpg.
- Crab_Pulsar wikiPageWikiLink File:Crab_Lucky_video2.gif.
- Crab_Pulsar wikiPageWikiLink File:Crab_Nebula_pulsar_x-ray.jpg.
- Crab_Pulsar wikiPageWikiLinkText "Crab Pulsar".
- Crab_Pulsar wikiPageWikiLinkText "Crab".
- Crab_Pulsar wikiPageWikiLinkText "Crab-like pulsar".
- Crab_Pulsar wikiPageWikiLinkText "pulsar in the Crab nebula".
- Crab_Pulsar appmagV "16.5".
- Crab_Pulsar bV "+0.5".
- Crab_Pulsar constell Taurus_(constellation).
- Crab_Pulsar dec "52.1".
- Crab_Pulsar distPc "2200".
- Crab_Pulsar epoch "J2000".
- Crab_Pulsar luminosity "?".
- Crab_Pulsar mass "1.4".
- Crab_Pulsar propMoDec "2".
- Crab_Pulsar propMoRa "-14.7".
- Crab_Pulsar ra "20071.97".
- Crab_Pulsar radius "~1.437815 × 10−5".
- Crab_Pulsar rotation "33.5028583 ms".
- Crab_Pulsar temperature "Center : ~3 × 108".
- Crab_Pulsar temperature "K Surface: ~1.6 × 106".
- Crab_Pulsar type Neutron_star.
- Crab_Pulsar uB "-0.45".
- Crab_Pulsar wikiPageUsesTemplate Template:Age.
- Crab_Pulsar wikiPageUsesTemplate Template:Citation_needed.
- Crab_Pulsar wikiPageUsesTemplate Template:Clarify.
- Crab_Pulsar wikiPageUsesTemplate Template:Commons_category.
- Crab_Pulsar wikiPageUsesTemplate Template:Reflist.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_astrometry.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_begin.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_catalog.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_character.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_detail.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_end.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_image.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_observe.
- Crab_Pulsar wikiPageUsesTemplate Template:Starbox_reference.
- Crab_Pulsar wikiPageUsesTemplate Template:Stars_of_Taurus.
- Crab_Pulsar subject Category:Crab_Nebula.
- Crab_Pulsar subject Category:Objects_named_with_variable_star_designations.
- Crab_Pulsar subject Category:Optical_pulsars.
- Crab_Pulsar subject Category:Pulsars.
- Crab_Pulsar subject Category:Taurus_(constellation).
- Crab_Pulsar type CelestialBody.
- Crab_Pulsar type Place.
- Crab_Pulsar type Planet.
- Crab_Pulsar type Star.
- Crab_Pulsar type Planet.
- Crab_Pulsar type Redirect.
- Crab_Pulsar type Location.
- Crab_Pulsar type Place.