Elemental Abundances of Blue Compact Dwarfs from Mid-Infrared Spectroscopy with Spitzer
Elemental Abundances of Blue Compact Dwarfs from Mid-Infrared Spectroscopy with Spitzer
复制标题
使用斯皮策中红外光谱观察蓝致密矮星的元素丰度
DOI：
10.1086/524005
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Houck
中科院分区：
文献类型：
--
作者：
Yanling Wu;J. Bernard;V. Charmandaris;V. Charmandaris;V. Lebouteiller;L. Hao;B. Brandl;J. Houck
利用Spitzer IRS获得的~10-37 μm高分辨光谱，研究了13个蓝致密矮（BCD）星系的元素丰度。我们推导出我们的样品的氖和硫的丰度使用红外精细结构线探测区域，可能被掩盖的尘埃在光学和比较我们的结果与类似的红外研究的星暴星系从ISO。我们发现一个很好的相关性之间的氖和硫的丰度，虽然硫是相对于氖相对于太阳值不足。从红外数据测量的元素丰度（氖和硫）与那些来自光学（氖，硫，氧）研究的比较揭示了一个很好的整体协议硫，而红外衍生的氖丰度略高于光学值。这表明，要么是尘埃笼罩的区域在BCD的金属丰度是类似的光学可访问的区域，或者，如果他们是不同的，他们没有实质性的贡献，总的主星系的红外辐射。
We present a study of elemental abundances in a sample of 13 blue compact dwarf (BCD) galaxies, using the ~10-37 μm high-resolution spectra obtained with Spitzer IRS. We derive the abundances of neon and sulfur for our sample using the infrared fine-structure lines probing regions which may be obscured by dust in the optical and compare our results with similar infrared studies of starburst galaxies from ISO. We find a good correlation between the neon and sulfur abundances, although sulfur is underabundant relative to neon with respect to the solar value. A comparison of the elemental abundances (neon and sulfur) measured from the infrared data with those derived from the optical (neon, sulfur, and oxygen) studies reveals a good overall agreement for sulfur, while the infrared-derived neon abundances are slightly higher than the optical values. This indicates either that the metallicities of dust-enshrouded regions in BCDs are similar to the optically accessible regions, or that if they are different they do not contribute substantially to the total infrared emission of the host galaxy.