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arXiv 1012.0782astro-ph.GA
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UWISH2 --H2的UKIRT宽视场红外测量

UWISH2 -- The UKIRT Widefield Infrared Survey for H2

D., Froebrich, C. J., Davis, G., Ioannidis, T. M., Gledhill, M., Takami, A., Chrysostomou, J., Drew, J., Eislöffel, A., Gosling, R., Gredel, J., Hatchell, K. W.… 展开作者

D., Froebrich, C. J., Davis, G., Ioannidis, T. M., Gledhill, M., Takami, A., Chrysostomou, J., Drew, J., Eislöffel, A., Gosling, R., Gredel, J., Hatchell, K. W., Hodapp, M. S. N., Kumar, P. W., Lucas, H., Matthews, M. G., Rawlings, M. D., Smith, B., Stecklum, W. P., Varricatt, H. T., Lee, P. S., Teixeira, C. A., Aspin, T., Khanzadyan, J., Karr, H. -J., Kim, B. -C., Koo, J. J., Lee, Y. -H., Lee, T. Y., Magakian, T. A., Movsessian, E. H., Nikogossian, T. S., Pyo, T., Stanke

摘要:

我们提出了对第一银河象限(10度<l<65度;-1.3度<b<+1.3度)进行无偏、近红外、窄带成像调查的目标和初步结果。这个区域包括北半球大部分的巨型分子云和大质量恒星形成区。该调查集中在H2的1- 0 S(1)振转线上,这是恒星形成区域、演化恒星周围和超新星遗迹中热致密分子气体的已证实示踪剂。这些观测补充了现有和即将进行的光度测量(Spitzer-GLIMPSE、UKIDSS-GPS、JCMT-JPS、AKARI、Herschel Hi-GAL等),虽然我们探测的是这些宽带巡天没有涵盖的恒星形成的动态活跃部分。我们的窄带调查目前已完成60%以上。在我们的图像中看到的中位数是0.73 arcsec。这些图像对点源的探测极限为5 σ,K= 18等,对我们的典型视宁度取平均值时,表面亮度极限为10^-19瓦·米^-2角秒^-2。从低质量和高质量的年轻恒星天体的喷流和外流被揭示,因为是新的行星状星云和-通过与早期的K波段观测作为UKIDSS GPS的一部分获得的比较-许多变星。凭借其卓越的空间分辨率,UWISH 2数据也有可能揭示GLIMPSE调查中发现的许多扩展绿色物体的真实性质。

英文摘要:

We present the goals and preliminary results of an unbiased, near-infrared, narrow-band imaging survey of the First Galactic Quadrant (10deg<l<65deg ; -1.3deg<b<+1.3deg). This area includes most of the Giant Molecular Clouds and massive star forming regions in the northern hemisphere. The survey is centred on the 1-0S(1) ro-vibrational line of H2, a proven tracer of hot, dense molecular gas in star-forming regions, around evolved stars, and in supernova remnants. The observations complement existing and upcoming photometric surveys (Spitzer-GLIMPSE, UKIDSS-GPS, JCMT-JPS, AKARI, Herschel Hi-GAL, etc.), though we probe a dynamically active component of star formation not covered by these broad-band surveys. Our narrow-band survey is currently more than 60% complete. The median seeing in our images is 0.73arcsec. The images have a 5sigma detection limit of point sources of K=18mag and the surface brightness limit is 10^-19Wm^-2arcsec^-2 when averaged over our typical seeing. Jets and outflows from both low and high mass Young Stellar Objects are revealed, as are new Planetary Nebulae and - via a comparison with earlier K-band observations acquired as part of the UKIDSS GPS - numerous variable stars. With their superior spatial resolution, the UWISH2 data also have the potential to reveal the true nature of many of the Extended Green Objects found in the GLIMPSE survey.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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