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arXiv 1109.0237astro-ph.CO
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用赫歇尔空间天文台研究M81、M83和NGC 2403中的尘埃加热

Investigations of dust heating in M81, M83, and NGC 2403 with the Herschel Space Observatory

G. J. Bendo, A. Boselli, A. Dariush, M. Pohlen, H. Roussel, M. Sauvage, M. W. L. Smith, C. D. Wilson, M. Baes, A. Cooray, D. L. Clements, L. Cortese, K. Foyle, … 展开作者

G. J. Bendo, A. Boselli, A. Dariush, M. Pohlen, H. Roussel, M. Sauvage, M. W. L. Smith, C. D. Wilson, M. Baes, A. Cooray, D. L. Clements, L. Cortese, K. Foyle, M. Galametz, H. L. Gomez, V. Lebouteiller, N. Lu, S. C. Madden, E. Mentuch, B. O'Halloran, M. J. Page, A. Remy, B. Schulz, L. Spinoglio

摘要:

我们使用斯皮策太空望远镜和赫歇尔空间天文台的远红外数据以及地面光学和近红外数据来了解附近面对螺旋星系M81,M83和NGC 2403的尘埃加热如何受到所有恒星星光和恒星形成区域辐射的影响。我们发现,70/160微米的表面亮度比往往更强烈的恒星形成区域的影响。然而,250/350微米和350/500微米的表面亮度比更强烈地受到来自总恒星星族的光的影响,这表明大于250微米的尘埃辐射主要来自比小于160微米的尘埃更冷的成分,并且相对不受恒星形成活动的影响。最后,我们讨论的影响,这两个附近和更遥远的星系的光谱能量分布建模,并使用远红外尘埃辐射跟踪恒星形成。

英文摘要:

We use Spitzer Space Telescope and Herschel Space Observatory far-infrared data along with ground-based optical and near-infrared data to understand how dust heating in the nearby face-on spiral galaxies M81, M83, and NGC 2403 is affected by the starlight from all stars and by the radiation from star forming regions. We find that 70/160 micron surface brightness ratios tend to be more strongly influenced by star forming regions. However, the 250/350 micron and 350/500 micron surface brightness ratios are more strongly affected by the light from the total stellar populations, suggesting that the dust emission at >250 microns originates predominantly from a component that is colder than the dust seen at <160 microns and that is relatively unaffected by star formation activity. We conclude by discussing the implications of this for modelling the spectral energy distributions of both nearby and more distant galaxies and for using far-infrared dust emission to trace star formation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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