Star-forming Environments throughout the M101 Group
Star-forming Environments throughout the M101 Group
复制标题
整个 M101 集团的造星环境
DOI:
10.3847/1538-4357/aa8fcd
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
P. Harding
中科院分区:
文献类型:
--
作者:
A. Watkins;A. Watkins;J. C. Mihos;P. Harding
We present a multiwavelength study of star formation within the nearby M101 Group, including new deep Hα imaging of M101 and its two companions. We perform a statistical analysis of the Hα-to-FUV flux ratios in H ii regions located in three different environments: M101's inner disk, M101's outer disk, and M101's lower-mass companion galaxy NGC 5474. We find that, once bulk radial trends in extinction are taken into account, both the median and scatter in FHα/FFUV in H ii regions are invariant across all of these environments. Also, using Starburst99 models, we are able to qualitatively reproduce the distributions of FHα/FFUV throughout these different environments using a standard Kroupa initial mass function (IMF); hence, we find no need to invoke truncations in the upper-mass end of the IMF to explain the young star-forming regions in the M101 Group even at extremely low surface density. This implies that star formation in low-density environments differs from star formation in high-density environments only by intensity and not by cloud-to-cloud physics.
DOI:
10.1088/0004-637x/702/1/277
发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Meidt S
通讯作者:
Meidt S
DOI:
10.1088/0004-637x/808/1/76
发表时间:
2015-05
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Crocker;R. Chandar;D. Calzetti;B. Holwerda;C. Leitherer;C. Popescu;R. Tuffs
通讯作者:
A. Crocker;R. Chandar;D. Calzetti;B. Holwerda;C. Leitherer;C. Popescu;R. Tuffs
DOI:
10.1088/0004-6256/140/5/1194
发表时间:
2010-07
期刊:
The Astronomical Journal
影响因子:
--
作者:
F. Bigiel;A. Leroy;F. Walter;L. Blitz;E. Brinks;W. D. Blok;B. M. U. Berkeley;Mpia Heidelberg;Nrao;U. Hertfordshire;U. C. Town;C. Observatories
通讯作者:
F. Bigiel;A. Leroy;F. Walter;L. Blitz;E. Brinks;W. D. Blok;B. M. U. Berkeley;Mpia Heidelberg;Nrao;U. Hertfordshire;U. C. Town;C. Observatories