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arXiv 1005.3784astro-ph.GA
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Herschel揭示的Rosette分子云中的小尺度结构

Small-scale structure in the Rosette molecular cloud revealed by Herschel

J. Di Francesco, S. Sadavoy, F. Motte, N. Schneider, M. Hennemann, S. Bontemps, T. Csengeri, Z. Balog, A. Zavagno, Ph. Andre, P. Saraceno, M. Griffin, A. Men'sh… 展开作者

J. Di Francesco, S. Sadavoy, F. Motte, N. Schneider, M. Hennemann, S. Bontemps, T. Csengeri, Z. Balog, A. Zavagno, Ph. Andre, P. Saraceno, M. Griffin, A. Men'shchikov, A. Abergel, J. -P. Baluteau, J. -Ph. Bernard, P. Cox, L. Deharveng, P. Didelon, A. -M. di Giorgio, P. Hargrave, M. Huang, J. Kirk, S. Leeks, J. Z. Li, A. Marston, P. Martin, V. Minier, S. Molinari, G. Olofsson, P. Persi, S. Pezzuto, D. Russeil, M. Sauvage, B. Sibthorpe, L. Spinoglio, L. Testi, D. Teyssier, R. Vavrek, D. Ward-Thompson, G. White, C. Wilson, A. Woodcraft

摘要:

我们提出了一个初步分析的小尺度结构中发现的新的70-520微米的玫瑰花分子云(RMC),获得与SPIRE和PACS仪器的赫歇尔空间天文台的连续谱图。我们发现473块内的RMC使用一种新的结构识别算法,尺寸高达~1.0 pc的直径。与最近的斯皮策地图比较后发现,371个团块是“无星的”(没有相关的年轻恒星),而102个是“原恒星”。“利用尘埃温度的相应值,我们确定团块的质量(M_C)在-0.75 <= log(M_C/M_sun)<= 2.50的范围内。线性拟合得到的团块质谱(CMS)的高质量尾部的斜率与其他组在CO排放中识别的高质量团块的斜率一致。

英文摘要:

We present a preliminary analysis of the small-scale structure found in new 70-520 micron continuum maps of the Rosette molecular cloud (RMC), obtained with the SPIRE and PACS instruments of the Herschel Space Observatory. We find 473 clumps within the RMC using a new structure identification algorithm, with sizes up to ~1.0 pc in diameter. A comparison with recent Spitzer maps reveals that 371 clumps are "starless" (without an associated young stellar object), while 102 are "protostellar." Using the respective values of dust temperature, we determine the clumps have masses (M_C) over the range -0.75 <= log (M_C/M_sun) <= 2.50. Linear fits to the high-mass tails of the resulting clump mass spectra (CMS) have slopes that are consistent with those found for high-mass clumps identified in CO emission by other groups.

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