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	Late-time photometry of two nearby type II-P supernovae: 2004dj and 2004et
	Zhang, Tian-Meng ; Wang, Xiao-Feng ; Zhou, Xu ; Ma, Jun ; Jiang, Zhao-Ji ; Wu, Jiang-Hua ; Wu, Zhen-Yu ; Basa, Stephane
	2010-10-12 ; 2010-10-12
关键词	supernovae: general supernovae: individual (SN 2004dj, SN 2004et) techniques: photometric EXPANDING PHOTOSPHERE METHOD EXTRAGALACTIC DISTANCE SCALE OBSERVATIONAL CONSTRAINTS OPTICAL PHOTOMETRY PROGENITOR NGC-2403 1999EM CLUSTER STARS FIELD Astronomy & Astrophysics
中文摘要	We present late-time photometry for two bright type II-P supernovae (SNe) 2004dj and 2004et, extending over 400 d after the explosion, which are measured with a set of intermediate-band filters that have the advantage of tracing the strength variations of some spectral features. Although these two SNe II-P exhibit similar photometric evolution at earlier times, they diverge during the nebular phase. SN 2004dj shows a slow late-time decline rate with similar to 0.7 +/- 0.1 mag (100d)(-1) during the period ranging from t approximate to 200 - 300d after the explosion, while SN 2004et shows a much faster decline rate at a comparable phase, e.g., 1.3 +/- 0.1 mag (100 d)(-1). The steeper decay rate seen in SN 2004et is likely due to dust formation in the explosion ejecta. Based on intermediate-band photometry, we derived the evolution of the feature lines [e.g., H alpha] of SNe 2004dj and 2004et which are similar in flux at comparable phases but perhaps with significantly different decay rates. The origin of the observed variations in the continuum and the feature lines is briefly discussed.
语种	英语 ; 英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES ; BEIJING ; 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/81479]
专题	清华大学
推荐引用方式 GB/T 7714	Zhang, Tian-Meng,Wang, Xiao-Feng,Zhou, Xu,et al. Late-time photometry of two nearby type II-P supernovae: 2004dj and 2004et[J],2010, 2010.
APA	Zhang, Tian-Meng.,Wang, Xiao-Feng.,Zhou, Xu.,Ma, Jun.,Jiang, Zhao-Ji.,...&Basa, Stephane.(2010).Late-time photometry of two nearby type II-P supernovae: 2004dj and 2004et..
MLA	Zhang, Tian-Meng,et al."Late-time photometry of two nearby type II-P supernovae: 2004dj and 2004et".(2010).

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