Deep Near-Infrared Imaging and Photometry of the Antennae Galaxies with WIRC
Deep Near-Infrared Imaging and Photometry of the Antennae Galaxies with WIRC
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使用 WIRC 对天线星系进行深近红外成像和光度测量
DOI：
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发表时间：
2005
期刊：
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通讯作者：
Thomas L. Hayward
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作者：
B. Brandl;D. M. Clark;S. Eikenberry;John C. Wilson;C. Henderson;D. Barry;J. Houck;Joseph C. Carson;Thomas L. Hayward
我们展示了用帕洛玛广域红外相机 (WIRC) 拍摄的天线星系的深近红外图像。这些图像覆盖了星系相互作用区周围的 4.′33 × 4.′33 (24.7 × 24.7 kpc) 区域。我们推导了 172 个红外星团的 J 和 Ks 波段光度通量，并讨论了两个星系核和重叠区域的细节。我们还讨论了 WIRC、HST 和 VLA 检测到的 27 个源的子集的属性。这些光源的共同点是小于 10 Myr 的年轻星团，它们的红外颜色和 6 厘米射电特性之间没有相关性。由于灭绝和进化，这些星团覆盖了广泛的红外颜色。平均消光约为 AV ~ 2 mag，而最红的星团可能会变红达 10 mag。
We present deep near-infrared images of the Antennae galaxies, taken with the Palomar Wide-Field Infrared Camera (WIRC). The images cover a 4.′33 × 4.′33 (24.7 × 24.7 kpc) area around the galaxy interaction zone. We derive J- and Ks-band photometric fluxes for 172 infrared star clusters and discuss details of the two galactic nuclei and the overlap region. We also discuss the properties of a subset of 27 sources that have been detected with WIRC, HST, and the VLA. The sources in common are young clusters of less than 10 Myr, which show no correlation between their infrared colors and 6 cm radio properties. These clusters cover a wide range in infrared color due to extinction and evolution. The average extinction is about AV ~ 2 mag, while the reddest clusters may be reddened by up to 10 mag.