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Parkes Catalogue Of Radio Sources
The Parkes Catalogue of Radio Sources, also known as the Parkes Southern Radio Source Catalog, consists of 8264 astronomical radio sources, mostly south of declination +27. The catalogue was mostly compiled by John Bolton and his colleagues for 20 years. Both the Molonglo 408-MHz survey and the 80-MHz Culgoora measurements of Slee et al have contributed to the usefulness of the catalogue. For now, the catalogue only contains sources originally found in the Parkes 2700-MHz survey. The catalogue contains radio sources that have a frequency range of 80 - 22,000 MHz. Objects * PKS 0521-365 * PKS 0637-752 * PKS 1209-51/52 * PKS 1302-102 * PKS 0548-322 * PKS 1727-21 (Kepler’s Supernova) * PKS 2000-330 * PKS 2014-55 * PKS 2155-304 * PKS 2201+044 * PKS-2349-014 * PKS 2357+00 (PGC 1) See also * Astronomical catalogues *List of astronomical catalogues An astronomical catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Radio Source
An astronomical radio source is an object in outer space that emits strong radio waves. Radio emission comes from a wide variety of sources. Such objects are among the most extreme and energetic physical processes in the universe. History In 1932, American physicist and radio engineer Karl Jansky detected radio waves coming from an unknown source in the center of our galaxy. Jansky was studying the origins of radio frequency interference for Bell Laboratories. He found "...a steady hiss type static of unknown origin", which eventually he concluded had an extraterrestrial origin. This was the first time that radio waves were detected from outer space. The first radio sky survey was conducted by Grote Reber and was completed in 1941. In the 1970s, some stars in our galaxy were found to be radio emitters, one of the strongest being the unique binary MWC 349. Sources: solar system The Sun As the nearest star, the Sun is the brightest radiation source in most frequencies, down to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kepler's Supernova
SN 1604, also known as Kepler's Supernova, Kepler's Nova or Kepler's Star, was a Type Ia supernova that occurred in the Milky Way, in the constellation Ophiuchus. Appearing in 1604, it is the most recent supernova in the Milky Way galaxy to have been unquestionably observed by the naked eye, occurring no farther than 6 kiloparsecs (20,000 light-years) from Earth. Before the adoption of the current naming system for supernovae, it was named for Johannes Kepler, the German astronomer who described it in ''De Stella Nova''. Observation Visible to the naked eye, Kepler's Star was brighter at its peak than any other star in the night sky, with an apparent magnitude of −2.5. It was visible during the day for over three weeks. Records of its sighting exist in European, Chinese, Korean, and Arabic sources. It was the second supernova to be observed in a generation (after SN 1572 seen by Tycho Brahe in Cassiopeia). No further supernovae have since been observed with certainty in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Catalogues
An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. The oldest and largest are star catalogues. Hundreds have been published, including general ones and special ones for such items as infrared stars, variable stars, giant stars, multiple star systems, star clusters, and so forth. General catalogs for deep space objects or for objects other than stars are also large. Again, there are specialized ones for nebulas, galaxies, X-ray sources, radio sources, quasars and other classes. The same is true for asteroids, comets and other solar system bodies. Astronomical catalogs such as those for asteroids may be compiled from multiple sources, but most modern catalogs are the result of a particular astronomical survey of some kind. Since the late 20th century catalogs are increasingly often compiled by computers from an au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PGC 1
PGC 1 is a radio galaxy located about 1.1 billion light-years away in the constellation Pisces Pisces may refer to: * Pisces, an obsolete (because of land vertebrates) taxonomic superclass including all fish * Pisces (astrology), an astrological sign * Pisces (constellation), a constellation **Pisces Overdensity, an overdensity of stars in .... Physical characteristics PGC 1 appears to have a companion galaxy called SDSS J235958.29+004208.6. However, the difference in the recessional velocities for the two galaxies corresponds to about 55 million light years difference in distance, so it is possible that they may not be a physical pair, but however they are essentially the same distance. Radio Jet PGC 1 has a radio jet coming out of its center. See also * Principal Galaxies Catalogue References External links Galaxies Pisces (constellation) 1 Radio galaxies {{galaxy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PKS 2201+044
PKS may refer to: * Pammal K. Sambandam, a 2002 Tamil language comedy film * Państwowa Komunikacja Samochodowa, Polish transport organization * Parkstone railway station, station code * Phi Kappa Sigma International Fraternity * Parkes Catalogue of Radio Sources, an astronomical catalogue * Polyketide synthases, enzymes * Prosperous Justice Party The Prosperous Justice Party ( id, Partai Keadilan Sejahtera, sometimes called the Justice and Prosperity Party), frequently abbreviated to PKS, is an IslamistAl-Hamdi, Ridho. (2017). ''Moving towards a Normalised Path: Political Islam in Contempo ... (''Partai Keadilan Sejahtera''), Indonesia * Serbian Chamber of Commerce {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PKS 2155-304
PKS 2155-304 is a BL Lac object, a galaxy hosting a type of blazar A blazar is an active galactic nucleus (AGN) with a relativistic jet (a jet composed of ionized matter traveling at nearly the speed of light) directed very nearly towards an observer. Relativistic beaming of electromagnetic radiation from the .... It is a strong emitter from radio to high-energy frequencies. PKS 2155-304 is at redshift z = 0.116 (Falomo, Pesce & Treves 1993). It is one of the brightest and most studied BL Lacs, one of the first identified through X-ray observations. References BL Lacertae objects Piscis Austrinus {{Stars of Piscis Austrinus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PKS 2014-55
PKS 2014-55 is an X-shaped radio galaxy discovered by the MeerKAT radio telescope in South Africa that is located 800 million light-years away from Earth. The galaxy looks like two boomerang A boomerang () is a thrown tool, typically constructed with aerofoil sections and designed to spin about an axis perpendicular to the direction of its flight. A returning boomerang is designed to return to the thrower, while a non-returning ...s, with jets extending 2.5 million light years across. Then the jets are “reversed” by the pressure of intergalactic gas, later deflected by gas pressure to form an “X” shape. References Galaxies Telescopium {{galaxy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PKS 2000-330
PKS 2000-330 (also known as QSO B2000-330) is a quasar located in the constellation Sagittarius. When identified in 1982, it was the most distant and most luminous object known. Distance measurements The "distance" of a far away galaxy depends on the distance measurement used. With a redshift of 3.77, light from this active galaxy is estimated to have taken around 11.7 billion years to reach us. But since this galaxy is receding from Earth at an estimated rate of 274,681 km/s (the speed of light is 299,792 km/s), the present (co-moving) distance to this galaxy is estimated to be around 22.7 billion light-years (6947 M pc). See also *List of the most distant astronomical objects This article documents the most distant astronomical objects discovered and verified so far, and the time periods in which they were so classified. For comparisons with the light travel distance of the astronomical objects listed below, the age of ... References {{Reflist Extern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PKS 0548-322
PKS may refer to: * Pammal K. Sambandam, a 2002 Tamil language comedy film * Państwowa Komunikacja Samochodowa, Polish transport organization * Parkstone railway station, station code * Phi Kappa Sigma International Fraternity * Parkes Catalogue of Radio Sources, an astronomical catalogue * Polyketide synthases, enzymes * Prosperous Justice Party The Prosperous Justice Party ( id, Partai Keadilan Sejahtera, sometimes called the Justice and Prosperity Party), frequently abbreviated to PKS, is an IslamistAl-Hamdi, Ridho. (2017). ''Moving towards a Normalised Path: Political Islam in Contempo ... (''Partai Keadilan Sejahtera''), Indonesia * Serbian Chamber of Commerce {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Declination
In astronomy, declination (abbreviated dec; symbol ''δ'') is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. Declination's angle is measured north or south of the celestial equator, along the hour circle passing through the point in question. The root of the word ''declination'' (Latin, ''declinatio'') means "a bending away" or "a bending down". It comes from the same root as the words ''incline'' ("bend foward") and ''recline'' ("bend backward"). In some 18th and 19th century astronomical texts, declination is given as ''North Pole Distance'' (N.P.D.), which is equivalent to 90 – (declination). For instance an object marked as declination −5 would have an N.P.D. of 95, and a declination of −90 (the south celestial pole) would have an N.P.D. of 180. Explanation Declination in astronomy is comparable to geographic latitude, projected onto the celestial sphere, and right ascension is like ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PKS 1302-102
PKS 1302-102 is a quasar in the Virgo constellation, located at a distance of approximately 1.1 Gpc (around 3.5 billion light-years). It has an apparent magnitude of about 14.9 mag in the V band with a redshift of 0.2784. The quasar is hosted by a bright elliptical galaxy, with two neighboring companions at distances of 3 kpc and 6 kpc. The light curve of PKS 1302-102 appears to be sinusoidal with an amplitude of 0.14 mag and a period of 1,884 ± 88 days, which suggests evidence of a supermassive black hole binary. Possible black hole binary PKS 1302-102 was selected from the Catalina Real-Time Transient Survey as one of 20 quasars with apparent periodic variations in the light curve. Of these quasars, PKS 1302-102 appeared to be the best candidate in terms of sinusoidal behavior and other selection criteria, such as data coverage of more than 1.5 cycles in the measured period. One plausible interpretation of the apparent periodic behavior is the possibility of two superma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
