A MID-INFRARED CENSUS OF STAR FORMATION ACTIVITY IN BOLOCAM GALACTIC PLANE SURVEY SOURCES
A MID-INFRARED CENSUS OF STAR FORMATION ACTIVITY IN BOLOCAM GALACTIC PLANE SURVEY SOURCES
复制标题
DOI：
10.1088/0004-637x/731/2/90
复制
发表时间：
2011-02
期刊：
影响因子：
--
通讯作者：
M. Dunham;T. Robitaille;N. Evans;W. Schlingman;C. Cyganowski;J. Urquhart
中科院分区：
文献类型：
--
作者：
M. Dunham;T. Robitaille;N. Evans;W. Schlingman;C. Cyganowski;J. Urquhart
我们提出的搜索结果中红外线迹象的星星形成活动的1.1毫米来源的Bolocam银河系平面调查（BGPS）。我们已经将BGPS星表与基于斯皮策太空望远镜GLIMPSE遗留调查和中途空间实验（MSX）银河平面调查的中红外银河平面星表相关联。我们发现，44%（8358个中的3712个）的BGPS源包含至少一个中红外源，包括所有调查重叠（10° <θ < 65°）的区域内的5067个中的2457个（49%）。考虑到BGPS和中红外源之间的机会对准，我们保守地估计，在所有调查重叠的区域内，20%的BPGS源显示出活跃星星形成的迹象。我们把BGPS源分为四组的基础上，他们的星星形成活动的概率。扩展的绿色物体和红色MSX源组成了最高概率组，而最低概率组由与任何中红外源不匹配的“无星”BGPS源组成。每组的平均1.1毫米通量随活跃星星形成概率的增加而增加。我们还发现，“无星”的BGPS源是最紧凑的，而具有最高概率的星星形成活动的源，平均更大的裙发射扩展。已知距离的280个BGPS源的子样本表明，质量和平均H2柱密度也随着星星形成活动的概率而增加。
We present the results of a search for mid-infrared signs of star formation activity in the 1.1 mm sources in the Bolocam Galactic Plane Survey (BGPS). We have correlated the BGPS catalog with available mid-IR Galactic plane catalogs based on the Spitzer Space Telescope GLIMPSE legacy survey and the Midcourse Space Experiment (MSX) Galactic plane survey. We find that 44% (3712 of 8358) of the BGPS sources contain at least one mid-IR source, including 2457 of 5067 (49%) within the area where all surveys overlap (10° < ℓ < 65°). Accounting for chance alignments between the BGPS and mid-IR sources, we conservatively estimate that 20% of the BPGS sources within the area where all surveys overlap show signs of active star formation. We separate the BGPS sources into four groups based on their probability of star formation activity. Extended Green Objects and Red MSX Sources make up the highest probability group, while the lowest probability group is comprised of “starless” BGPS sources which were not matched to any mid-IR sources. The mean 1.1 mm flux of each group increases with increasing probability of active star formation. We also find that the “starless” BGPS sources are the most compact, while the sources with the highest probability of star formation activity are on average more extended with large skirts of emission. A subsample of 280 BGPS sources with known distances demonstrates that mass and mean H2 column density also increase with probability of star formation activity.