SPITZER 24 mu m IMAGES OF PLANETARY NEBULAE

NCU Institutional Repository > 理學院 > 天文研究所 > 期刊論文 > Item 987654321/27867

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27867

题名:	SPITZER 24 mu m IMAGES OF PLANETARY NEBULAE
作者:	Chu,YH;Gruendl,RA;Guerrero,MA;Su,KYL;Bilikova,J;Cohen,M;Parker,QA;Volk,K;Caulet,A;Chen,WP;Hora,JL;Rauch,T
贡献者:	天文研究所
关键词:	ASYMPTOTIC GIANT BRANCH;ARRAY CAMERA IRAC;CENTRAL STARS;SPACE-TELESCOPE;MASS-LOSS;CATALOG;DISTANCES;MIPS
日期:	2009
上传时间:	2010-06-29 19:35:08 (UTC+8)
出版者:	中央大學
摘要:	Spitzer MIPS 24 mu m images were obtained for 36 Galactic planetary nebulae (PNe) whose central stars are hot white dwarfs (WDs) or pre-WDs with effective temperatures of similar to 100,000 K or higher. Diffuse 24 mu m emission is detected in 28 of these PNe. The eight nondetections are angularly large PNe with very low H alpha surface brightnesses. We find three types of correspondence between the 24 mu m emission and H alpha line emission of these PNe: six show 24 mu m emission more extended than H alpha emission, nine have a similar extent at 24 mu m and H alpha, and 13 show diffuse 24 mu m emission near the center of the H alpha shell. The sizes and surface brightnesses of these three groups of PNe and the nondetections suggest an evolutionary sequence, with the youngest ones being brightest and the most evolved ones undetected. The 24 mu m band emission from these PNe is attributed to [O IV] 25.9 mu m and [Ne V] 24.3 mu m line emission and dust continuum emission, but the relative contributions of these three components depend on the temperature of the central star and the distribution of gas and dust in the nebula.
關聯:	ASTRONOMICAL JOURNAL
显示于类别:	[天文研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	427	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....