Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Crab_Pulsar> ?p ?o. }
Showing items 1 to 64 of
64
with 100 items per page.
- 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. In between the main pulse there is also another weak pulse, called the inter-pulse.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.[citation needed]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 wikiPageRevisionID "602679073".
- Crab_Pulsar appmagV "16.5".
- Crab_Pulsar bV "+0.5".
- Crab_Pulsar constell Taurus_(constellation).
- Crab_Pulsar dec "+22° 00' 52.1"".
- Crab_Pulsar distPc "2200".
- Crab_Pulsar epoch "J2000".
- Crab_Pulsar hasPhotoCollection Crab_Pulsar.
- 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 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 CelestialBody109239740.
- Crab_Pulsar type NaturalObject100019128.
- Crab_Pulsar type NeutronStar109369692.
- Crab_Pulsar type Object100002684.
- Crab_Pulsar type OpticalPulsars.
- Crab_Pulsar type PhysicalEntity100001930.
- Crab_Pulsar type Pulsar109400987.
- Crab_Pulsar type Pulsars.
- Crab_Pulsar type Star109444100.
- Crab_Pulsar type Whole100003553.
- Crab_Pulsar type CelestialBody.
- Crab_Pulsar type Star.
- Crab_Pulsar type PhysicalBody.
- Crab_Pulsar comment "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.".
- Crab_Pulsar label "Crab Pulsar".
- Crab_Pulsar label "PSR B0531+21".
- Crab_Pulsar label "PSR B0531+21".
- Crab_Pulsar label "Pulsar del Granchio".
- Crab_Pulsar label "Pulsar do Caranguejo".
- Crab_Pulsar label "Púlsar del Cangrejo".
- Crab_Pulsar label "نباض السرطان".
- Crab_Pulsar label "かにパルサー".
- Crab_Pulsar label "蟹状星云脉冲星".
- Crab_Pulsar sameAs Krabí_pulsar.
- Crab_Pulsar sameAs Púlsar_del_Cangrejo.
- Crab_Pulsar sameAs PSR_B0531+21.
- Crab_Pulsar sameAs Pulsar_del_Granchio.
- Crab_Pulsar sameAs かにパルサー.
- Crab_Pulsar sameAs 게_성운_펄서.
- Crab_Pulsar sameAs Pulsar_do_Caranguejo.
- Crab_Pulsar sameAs m.04kmwz.
- Crab_Pulsar sameAs Q1044623.
- Crab_Pulsar sameAs Q1044623.
- Crab_Pulsar sameAs Crab_Pulsar.
- Crab_Pulsar wasDerivedFrom Crab_Pulsar?oldid=602679073.
- Crab_Pulsar depiction Chandra-crab.jpg.
- Crab_Pulsar isPrimaryTopicOf Crab_Pulsar.
- Crab_Pulsar name "Crab Pulsar".