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SN 2003gd - 版本历史
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<p><b>新页面</b></p><div>{{ Supernova |<br />
| name = SN 2003gd<br />
| image = <br />
| caption= <br />
| type = SN II-P<br />
| epoch = J2000<br />
| SNRtype = <br />
| host = [[M74]](NGC 628) <br />
| constellation = [[双鱼座]]<br />
| ra = {{RA|01|36|42.65}}<br />
| dec = {{DEC|15|44|20.9}}<br />
| gal = 138.6379 -45.7477<br />
| discovery = 2003年6月12日<br />
| iauc = [http://www.cfa.harvard.edu/iauc/08100/08150.html]<br />
| mag_v = 13.2<br />
| distance = 3000万光年<br />
| progenitor = --<br />
| progenitor_type = 红巨星<br />
| b-v = --<br />
| notes = --<br />
}}<br />
'''SN 2003gd'''是2003年6月12日[[罗伯特·埃文斯]](Robert Evans)利用口径为31厘米[[反射望远镜]]在[[双鱼座]][[M74]]星系发现的[[超新星]]，并于6月13日由[[赛丁泉天文台]]的口径为1米的望远镜予以确认<ref>[http://www.cfa.harvard.edu/iauc/08100/08150.html IAU Circular No. 8150]</ref>。<br />
<br />
在SN 2003gd爆发前[[哈勃空间望远镜]]和[[双子星天文台]]对[[M74]]分别进行过大约200天和300天的观测，天文学家由此可以根据资料确定SN 2003gd的前身星是一颗质量大约为太阳7倍的红巨星，刚好符合[[恒星演化]]的预测模型。这也是天文学历史上第一次能够准确确认一颗[[II型超新星|II-P型超新星]]的前身星<ref>{{cite web | url = http://www.ing.iac.es/PR/SH/SH2004/sn.html | title = First Detection of a Progenitor Star from a Normal Type II-P Supernova | accessdate = 2008-04-10 | archive-date = 2008-03-24 | archive-url = https://web.archive.org/web/20080324021030/http://www.ing.iac.es/PR/SH/SH2004/sn.html | dead-url = no }}</ref><ref>{{cite article | author = S.J. Smartt et al. | title = Detection of a Red Supergiant Progenitor Star of a Type II-Plateau Supernova | journal = Science | year = 2004 | issue = 5657 | pages = 499–503 | url = http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004Sci...303..499S&amp;db_key=AST&amp;high=41d9aae83d25700}}</ref>。<br />
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==参考资料==<br />
{{reflist}}<br />
<br />
[[Category:超新星]]<br />
[[Category:双鱼座]]</div>
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