Spitzer IRAC Colors of Nebulae Associated with Star-Forming Regions

  title={Spitzer IRAC Colors of Nebulae Associated with Star-Forming Regions},
  author={Yoichi Itoh and Yumiko Oasa},
  journal={International Journal of Astronomy and Astrophysics},
  • Y. Itoh, Y. Oasa
  • Published 30 May 2020
  • Physics
  • International Journal of Astronomy and Astrophysics
Star-forming regions are often associated with nebulosity. In this study, we investigated infrared diffuse emission in Spitzer IRAC images. The infrared nebula L1527 traces outflows emanating from a low-mass protostar. The nebular color is consistent with the color of a stellar photosphere with large extinction. Nebulae around the HII region W5-East are bright in the infrared. These colors are consistent with the model color of dust containing polycyclic aromatic hydrocarbon (PAH). The strength… Expand

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