|
CEERS 1019
CEERS 1019 is a black hole in the galaxy previously identified as EGSY8p7 or z910_6811 and may be the oldest known black hole as of 2023. The galaxy and its black hole already existed about 570 million years after the Big Bang, and the black hole in the center of CEERS 1019 seems to be less massive than any other black holes identified in the early universe but still larger than black hole growth methods can currently explain. The authors of a 2023 preprint describing it state that "We find that it is difficult to explain a SMBH of this mass ... with a stellar seed", i.e. gravitational collapse into a stellar black hole. Its mass is 10 (3.8-21 million) solar masses. Nitrogen Excess Subsequent study of CEERS 1019 involved measurement of nitrogen abundance relative to oxygen (a standard reference point for metallcitiy) using ultraviolet lines emitted by oxygen, O III] 1660, and nitrogen, N IV] 1486 and N III 1750. Other abundances, such as carbon (measured from C III] 1909) foll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boötes
Boötes ( ) is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from , which comes from 'herder, herdsman' or 'plowman' (literally, 'ox-driver'; from ''boûs'' 'cow'). One of the 48 constellations described by the 2nd-century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the List of brightest stars, fourth-brightest star in the night sky, the orange giant Arcturus. Epsilon Boötis, or Izar, is a colourful multiple star popular with amateur astronomers. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye. History and mythology In ancient Babylon, the stars of Boötes were known as SHU.PA. They were apparently depicted as the god Enlil, who was the leader of the Babylonian religion, Babyloni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Hole
A black hole is a massive, compact astronomical object so dense that its gravity prevents anything from escaping, even light. Albert Einstein's theory of general relativity predicts that a sufficiently compact mass will form a black hole. The boundary (topology), boundary of no escape is called the event horizon. A black hole has a great effect on the fate and circumstances of an object crossing it, but has no locally detectable features according to general relativity. In many ways, a black hole acts like an ideal black body, as it reflects no light. Quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with thermal radiation, the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is of the Orders of magnitude (temperature), order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly. Objects whose gravitational fields are too strong for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EGSY8p7
__NOTOC__ EGSY8p7 (EGSY-2008532660) is a distant galaxy in the constellation of Boötes, with a spectroscopic redshift of ''z'' = 8.68 (photometric redshift 8.57), a light travel distance of 13.2 billion light-years from Earth. Therefore, at an age of 13.2 billion years, it is observed as it existed 570 million years after the Big Bang, which occurred 13.8 billion years ago, using the W. M. Keck Observatory. In July 2015, EGSY8p7 was announced as the oldest and most-distant known object, surpassing the previous record holder, EGS-zs8-1, which was determined in May 2015 as the oldest and most distant object. In March 2016, Pascal Oesch, one of the discoverers of EGSY8p7, announced the discovery of GN-z11, an older and more distant galaxy. The galaxy contains a supermassive black hole, CEERS 1019. Detection The light of the EGSY8p7 galaxy appears to have been magnified twofold by gravitational lensing in the light's travel to Earth, enabling the detection of EGSY8p7, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Webb Detects Most Distant Active Supermassive Black Hole To Date (NIRCam Image) (53029197077)
Webb may refer to: Places Antarctica *Webb Glacier (South Georgia) *Webb Glacier (Victoria Land) * Webb Névé, Victoria Land, the névé at the head of Seafarer Glacier * Webb Nunataks, a group of nunataks in the Neptune Range * Webb Peak (other) Canada * Rural Municipality of Webb No. 138, Saskatchewan ** Webb, Saskatchewan, a village within the rural municipality United States *Webb, Alabama, a town *Webb, Iowa, a city *Webb Lake (Maine) *Webb River, Maine *Webb Memorial State Park, Massachusetts *Webb, Mississippi, a town *Webb City, Missouri, a city *Webb City, Oklahoma, a town *Webb, New York, a town *Webb, Texas, an unincorporated community *Webb County, Texas *Webb Air Force Base, near Big Spring, Texas *Webb Hill, Utah * Webb, West Virginia, an unincorporated community *Webb Canyon, Grand Teton National Park, Wyoming The Moon *Webb (crater) Things * CSS ''Webb'', a Confederate States Navy steam ram in the American Civil War * James Webb Space Telescope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stellar Black Hole
A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star. They have masses ranging from about 5 to several tens of solar masses. They are the remnants of supernova explosions, which may be observed as a type of gamma ray burst. These black holes are also referred to as collapsars. Properties By the no-hair theorem, a black hole can only have three fundamental properties: mass, electric charge, and angular momentum. The angular momentum of a stellar black hole is due to the conservation of angular momentum of the star or objects that produced it. The gravitational collapse of a star is a natural process that can produce a black hole. It is inevitable at the end of the life of a massive star when all stellar energy sources are exhausted. If the mass of the collapsing part of the star is below the TOV limit, Tolman–Oppenheimer–Volkoff (TOV) limit for Degenerate matter#Neutron degeneracy, neutron-degenerate matter, the end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CEERS-93316
CEERS-93316 is a high-redshift galaxy with a spectroscopic redshift z=4.9. Significantly, the redshift that was initially reported was photometric redshift, photometric (z = 16.4) and would have made CEERS-93316 the earliest and most distant known galaxy observed. CEERS-93316 has a light-travel distance (Distance measure#Alternative terminology, lookback time) of 12.6 billion years, and, due to the expansion of the universe, a Comoving distance, present proper distance of 25.7 billion light-years. (H0=67.4 and OmegaM=0.315 (see Table/Planck2018 at "Lambda-CDM model#Parameters" ) Discovery The candidate Redshift, high-redshift galaxy A galaxy is a Physical system, system of stars, stellar remnants, interstellar medium, interstellar gas, cosmic dust, dust, and dark matter bound together by gravity. The word is derived from the Ancient Greek, Greek ' (), literally 'milky', ... CEERS-93316 (Right ascension, RA:14:19:39.48 Declination, DEC:+52:56:34.92), in the Boötes (cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Collapse Black Hole
Direct collapse black holes (DCBHs) are high-mass black hole seeds that form from the direct collapse of a large amount of material. They putatively formed within the redshift range ''z''=15–30, when the Universe was about 100–250 million years old. Unlike seeds formed from the first population of stars (also known as Population III stars), direct collapse black hole seeds are formed by a direct, General relativity, general relativistic instability. They are very massive, with a typical mass at formation of ~. This category of black hole seeds was originally proposed theoretically to alleviate the challenge in building supermassive black holes already at redshift z~7, as numerous observations to date have confirmed. __TOC__ Formation Direct collapse black holes (DCBHs) are massive black hole seeds theorized to have formed in the high-redshift Universe and with typical masses at formation of ~, but spanning between and . The environmental physical conditions to form a DCBH ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of The Most Distant Astronomical Objects
This article documents the most distant Astronomical object, 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 the universe since the Big Bang is currently estimated as 13.787 ± 0.020 Gyr. Distances to remote objects, other than those in nearby galaxies, are nearly always inferred by measuring the cosmological redshift of their light. By their nature, very distant objects tend to be very faint, and these distance determinations are difficult and subject to errors. An important distinction is whether the distance is determined via spectroscopy or using a photometric redshift technique. The former is generally both more precise and also more reliable, in the sense that photometric redshifts are more prone to being wrong due to confusion with lower redshift sources that may have unusual spectra. For that reason, a spectroscop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ScienceAlert
ScienceAlert is an independently run online publication and news source that publishes articles featuring scientific research, discoveries, and outcomes. The site was founded in 2004 by Julian Cribb, a science writer, to aggregate research findings from Australian universities, and it expanded in 2006 when ex-Microsoft programmer Chris Cassella took on the project of developing the website. It has readership that ranges from 11.5m to 26.5m per month. Science journalist Fiona MacDonald has been CEO since 2017. History Science communicator Julian Cribb founded ScienceAlert in 2004. The website was born out of his "concern at the lack of information available about what Australians and New Zealanders achieve in science". Chris Cassella, a former programmer for Microsoft, joined the site in order to develop new web tools. He took on this work as part of a master's degree thesis in science communication at Australia National University, where Cribb was a professor. Initially, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Live Science
Live Science is a science news website. The publication features stories on a wide range of topics, including space, animals, health, archaeology, human behavior, and planet Earth. It also includes a reference section with links to other websites. Its stated mission is to inform and entertain readers about science and the world around them.{{r, mission History Live Science was originally made in 2004. It was acquired by ediaNetwork, later called Purch, in 2009.{{r, purch Purch consumer brands (including Live Science) were acquired by Future The future is the time after the past and present. Its arrival is considered inevitable due to the existence of time and the laws of physics. Due to the apparent nature of reality and the unavoidability of the future, everything that currently ex ... in 2018. Reception In 2011, the '' Columbia Journalism Review''{{'s "News Startups Guide" called Live Science "a purebred Web animal, primarily featuring one-off stories and photo gall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankfurter Rundschau
The ''Frankfurter Rundschau'' (''FR'') is a German daily newspaper, based in Frankfurt am Main. The ''Rundschaus editorial stance is social liberal. It holds that "independence, social justice and fairness" underlie its journalism. In Post-war Germany ''Frankfurter Rundschau'' was for decades a leading force of German press. The newspaper was one of the first licensed by the US military administration in 1945 and had a traditional social democratic, antifascist and trade union stand. Starting with the decline of printed daily newspapers in the 2000s, the ''FR'' changed ownership several times, reduced its editorial team dramatically and today has little national significance. Frankfurter Rundschau Druck and Verlagshaus GmbH filed for bankruptcy on 12 November 2012. Then the paper was acquired by ''Frankfurter Allgemeine Zeitung'' and Frankfurter Societät (publisher of the ''Frankfurter Neue Presse'') in 2013, by taking over just 28 full-time journalists. The ''FR'' editori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Objects Discovered In 2021
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole. Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Egyptians, Babylonians, Greeks, Indians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
