imported>Kcx36：// InPageEdit

2025-05-16T08:52:47Z

// InPageEdit

新页面

{{Infobox astronomical event
| name = GRB 090423
| image =
| caption = Afterglow of GRB 090423 taken by the [[Gemini Observatory]]
| credit =
| discovery = 07:55 [[UTC]]<br>2009年4月23日
| detected_by = [[雨燕卫星]]
| duration = 10秒
| ra = {{RA|09|55|33.08}}
| dec = {{DEC|+18|08|58.9}}
| redshift = 8.0 ≤ ''z'' ≤ 8.3
| distance = 130亿光年
| host =
| appmag_v =
| energy =
| names =
}}

'''GRB 090423'''是一个[[伽瑪射線暴]]（GRB）。2009年4月23日世界标准时07:55:19，专门用于观测[[伽玛射线爆發]]<ref>{{cite journal |journal=GCN Circulars |issue=9198
|url=http://gcn.gsfc.nasa.gov/gcn3/9198.gcn3 |author=Krimm, H. ''et al'' |title=GRB 090423: Swift detection of a burst |year=2009 |accessdate=2009-04-27 |archive-date=2016-03-03 |archive-url=https://web.archive.org/web/20160303184349/http://gcn.gsfc.nasa.gov/gcn3/9198.gcn3 |dead-url=no }}</ref>的[[雨燕卫星]]探测到一次遥远的伽玛射线爆发，位置在[[軒轅十三]]（獅子座η，獅子座30）西方數度之處，它的[[红移值]]Z=8.2<ref>{{cite journal |journal=GCN Circulars |issue=9209
|url=http://gcn.gsfc.nasa.gov/gcn3/9209.gcn3 |author=Cucchiara, A. ''et al'' |title=GRB 090423: NIR photometry and evidence for spectral break |year=2009 |accessdate=2009-04-27 |archive-date=2016-06-29 |archive-url=https://web.archive.org/web/20160629160418/http://gcn.gsfc.nasa.gov/gcn3/9209.gcn3 |dead-url=yes}}</ref><ref>{{cite journal|journal = GCN Circulars|issue = 9215|url = http://gcn.gsfc.nasa.gov/gcn3/9215.gcn3|author = Olivares, H. ''et al''|title = GRB 090423: GROND detection and preliminary photo-z|year = 2009|access-date = 2009-04-27|archive-date = 2013-05-11|archive-url = https://web.archive.org/web/20130511043252/http://gcn.gsfc.nasa.gov/gcn3/9215.gcn3|dead-url = yes}}</ref><ref>{{cite journal|journal = GCN Circulars|issue = 9216|url = http://gcn.gsfc.nasa.gov/gcn3/9216.gcn3|author = Thoene, H. ''et al''|title = GRB 090423: TNG Amici spectrum|year = 2009|access-date = 2009-04-27|archive-date = 2016-03-04|archive-url = https://web.archive.org/web/20160304102614/http://gcn.gsfc.nasa.gov/gcn3/9216.gcn3|dead-url = yes}}</ref><ref>{{cite journal|journal = GCN Circulars|issue = 9219|url = http://gcn.gsfc.nasa.gov/gcn3/9219.gcn3|author = Tanvir, H. ''et al''|title = GRB 090423: VLT/ISAAC spectroscopy|year = 2009|access-date = 2009-04-27|archive-date = 2013-05-11|archive-url = https://web.archive.org/web/20130511060548/http://gcn.gsfc.nasa.gov/gcn3/9219.gcn3|dead-url = yes}}</ref>，这次事件距离地球130亿[[光年]]，发生在[[宇宙大爆炸]]后约6.3亿年的宇宙诞生初期，證實巨型恆星的誕生（和死亡）在非常早期的宇宙確實發生過<ref>{{cite web | title = TNG caught the farthest GRB observed ever | url = http://www.tng.iac.es/news/2009/04/24/grb/ | date = 2009 | accessdate = 2009-04-25 | publisher = Fundación Galileo Galilei | deadurl = yes | archiveurl = https://www.webcitation.org/67tHcb4TP?url=http://www.tng.iac.es/news/2009/04/24/grb/ | archivedate = 2012-05-24 }}</ref>。GRB 090423在发现时是距离地球最远的天体，2010年被[[UDFy-38135539]]超越。而它离地球最远伽瑪射線暴的纪录则在2011年5月被[[GRB 090429B]]打破。

在雨燕探测到GRB 090423之后一周，天文学家利用[[甚大天线阵]]探测到它的第一波射电辐射，并且在其后两个月追踪它的亮度变暗情况，发现这次爆发的前身星要比其他已知的伽玛射线爆发更明亮。这使得科学家怀疑宇宙中的第一代[[恒星]]要比后来形成的恒星温度更高，质量更大。但这种假说仍然需要对更多伽玛射线暴的观测来证实<ref>{{Cite web |url=http://www.universetoday.com/2009/10/28/more-observations-of-grb-090423-the-most-distant-known-object-in-the-universe |title=More Observations of GRB 090423, the Most Distant Known Object in the Universe |accessdate=2010-02-19 |archive-date=2009-11-03 |archive-url=https://web.archive.org/web/20091103114544/http://www.universetoday.com/2009/10/28/more-observations-of-grb-090423-the-most-distant-known-object-in-the-universe/ |dead-url=no }}</ref>。

== 相關條目 ==
* [[IOK-1]]
* [[Galaxy Abell 1835 IR1916]]

== 参考資料 ==
{{reflist}}

{{start box}}
{{s-records}}
{{Succession record holder box|[[IOK-1]]|[[EGSY8p7]]|[[最遙遠的天體列表|最遙遠天體]]|2009年－2015年}}
{{Succession record holder box|[[GRB 080913]]|[[GRB 090429B]]|最遙遠的伽瑪射線暴|2009年－2011年}}
{{end}}

{{Sky|09|55|33.08|+|18|08|58.9|13000000000}}

[[Category:伽瑪射線暴|090423]]
[[Category:獅子座]]

GRB 090423 - 版本历史

imported>Kcx36：​// InPageEdit

imported>Kcx36：// InPageEdit