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=[[:en:SN 1979C]]=
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=[[SN 1979C]]=
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{{corpo celeste
|tipo=Supernova
|nome= SN_1979C
|costellazione=[[Chioma di Berenice (costellazione)|Chioma di Berenice]]
|immagine=SN1979C in M100.jpg
|dimensione_immagine=280px
|didascalia=
|data=
|epoca = [[J2000.0]]
|scoperta_autore=Gus Johnson<ref name="harvard">{{cite web|title=The Man Who Discovered SN 1979C and Beat the Machines|url=http://chandra.harvard.edu/chronicle/0410/sn1979c/index.html|publisher=[[Harvard-Smithsonian Center for Astrophysics]]|author=Peter Edmonds|date=November 16, 2010|accessdate=2010-11-21}}</ref>
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|scoperta_autori=
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|data=[[19 aprile]] [[1979]]<ref name="harvard" />
|ar = {{RA|12|22|58,58}}
|declinaz = {{DEC|+15|47|52,7}}
|lat_galattica=
|long_galattica=
|tipo_SN=[[supernova di tipo II]]<ref name="ut">{{cite web|title=Has a Recent, Nearby Supernova Become a Baby Black Hole?|url=http://www.universetoday.com/78836/has-a-recent-nearby-supernova-become-a-baby-black-hole/|author=Nancy Atkinson|date=November 15th, 2010|publisher=[[Universe Today]]|accessdate=2010-11-18}}</ref>
|stella_prog=
|tipo_prog=
|host= [[M100]]
|distanza_anniluce = 50.000.000 [[anno luce|anni luce]] (15312300 [[parsec|pc]])
|magn_picco=+12,23
|indice_di_colore =
|}}
'''SN 1979C''' era una [[supernova]] distante circa 50 milioni di anni luce nella galassia [[M100]], una galassia a spirale nella costellazione della [[Coma Berenices]].
Il 15 novembre 2010 la [[NASA]] annunciò che era stato rilevato un [[buco nero]] come residuo dell'esplosione della [[supernova]]<ref>Trent Perrotto; Janet Anderson, Megan Watzke (15/11/2010). "NASA'S Chandra Finds Youngest Nearby Black Hole"</ref>. La rilevazione è stata resa possibile dai dati acquisiti attraverso i telescopi orbitanti [[Chandra]], [[Swift]], [[XMM-Newton]] e al tedesco [[ROSAT]] (operativo fino al 1999) nell'arco degli anni dal 1995 al 2007.
I dati rilevano una sorgente stabile di [[raggi X]], probabilmente alimentata da materiale inghiottito dal buco nero e proveniente dai resti della supernova o da una [[stella binaria]] compagna.
'''SN 1979C''' was a [[supernova]] about 50 million [[light-year]]s away in [[Messier 100]], a [[spiral galaxy]] in the [[constellation]] [[Coma Berenices]]. The [[Type II supernova]] was discovered April 19, 1979 by Gus Johnson, a school teacher and amateur astronomer.<ref name="harvard">{{cite web|title=The Man Who Discovered SN 1979C and Beat the Machines|url=http://chandra.harvard.edu/chronicle/0410/sn1979c/index.html|publisher=[[Harvard–Smithsonian Center for Astrophysics]]|author=Peter Edmonds|date=November 16, 2010|accessdate=2010-11-21}}</ref> This type of supernova is known as a core collapse and is the result of the internal collapse and violent explosion of a large star. A star must have at least 9 times the mass of the [[Sun]] in order to undergo this type of collapse.<ref>{{cite journal| last = Gilmore | first = Gerry| title=The Short Spectacular Life of a Superstar| journal=Science | year=2004 | volume=304| issue=5697 | pages=1915–1916 | url=http://www.sciencemag.org/cgi/content/full/sci;304/5679/1915| accessdate=2007-05-01 | doi=10.1126/science.1100370| pmid = 15218132 }}</ref> The star that resulted in this supernova was estimated to be in the range of 20 [[solar mass]]es.<ref name="ut"/>
On November 15, 2010 [[NASA]] announced that evidence of a [[black hole]] had been detected as a remnant of the supernova explosion. Scientists lead by Dr. Dan Patnaude from the [[Harvard–Smithsonian Center for Astrophysics]] in [[Cambridge, Massachusetts|Cambridge, MA]] evaluated data gathered between 1995 and 2007 from several [[space observatory|space based observatories]]. NASA's [[Chandra X-ray Observatory]], the [[Swift Gamma-Ray Burst Mission]], as well as the [[European Space Agency]]'s [[XMM-Newton]], and Germany's [[ROSAT]] all participated in the examination.<ref name="nasa">{{cite web|url=http://www.nasa.gov/home/hqnews/2010/nov/HQ_10-299_CHANDRA.html|title=NASA'S Chandra Finds Youngest Nearby Black Hole|date=Nov. 15, 2010|publisher=[[NASA]]|accessdate=2010-11-15|author=Trent Perrotto|coauthors=Janet Anderson, Megan Watzke}}</ref>
The researchers observed a steady source of [[X-ray]]s and determined that it was likely that this was material being fed into the object either from the supernova or a [[Binary system (astronomy)|binary]] companion. However, an alternative explanation would be that the X-ray emissions could be from the [[pulsar wind nebula]] from a rapidly spinning [[pulsar]], similar to the one in the center of the [[Crab Nebula]].<ref name="nasa"/> These two ideas account for several types of known X-ray sources. In the case of black holes the material that falls into the black hole emits the X-rays and not the black hole itself. Gas is heated by the fall into the strong [[gravitational field]].
SN 1979C has also been studied in the radio frequency spectrum. A [[light curve]] study was performed between 1985 and 1990 using the [[Very Large Array]] radio telescope in [[New Mexico]].<ref name="astro">{{cite journal |author=Weiler, K. W.|coauthors=van Dyk, S. D., Discenna, J. L., Panagia, N., & Sramek, R. A. |year=1991 |title=The 10 year radio light curves for SN 1979C |journal=Astrophysical Journal, Part 1 (ISSN 0004-637X)|volume= vol. 380|pages=p. 161-166 |url=http://adsabs.harvard.edu/full/1991ApJ...380..161W }}</ref>
'''SN 1979C''' era una [[supernova]] distante circa 50 milioni di anni luce nella galassia [[M100|Messier 100]], una [[galassia a spirale]] nella costellazione della [[Chioma di Berenice (costellazione)|Chioma di Berenice]]. La [[supernova di tipo II]]<ref name="ut" /> è stata scoperta il [[19 aprile]] [[1979]] da Gus Johnson, maestro di scuola e astronomo amatoriale<ref name="harvard" />. Questo tipo di supernova è conosciuto come un collasso del nucleo ed è il risultato del collasso interno e violenta esplosione di una stella di grandi dimensioni. Una stella deve avere almeno 9 volte la massa del Sole, al fine di sottoporsi a questo tipo di collasso. [3] è stata valutata la stella che ha portato in questa supernova di essere nel range di 20 masse solari [1].
== Note ==
<references/>
== Collegamenti esterni ==
* [http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=SN+1979C&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id SN 1979C in M100]
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