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The Earliest Stages of Massive Clustered Star Formation: Fragmentation of Infrared Dark Clouds pp 1–18Cite as

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Abstract

The starry night is one of the most intriguing views from Earth. Stars are the basic elements of the Universe. Their origin is therefore a fundamental question in astronomy. Across the Milky Way, the Sun seems like a “normal” star, but it is unique for human beings. The formation of the Sun directly determines how our home planet formed, and how life originated on Earth. Since the Big Bang, generations of stars born and die. Through their life cycles, stars burn hydrogen and helium into heavier elements. These elements constitute a rich Universe today and a vibrant planet Earth, including the curious mankind itself.

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Notes

  1. 1.

    In fact, for a given YSO, the observed SED is determined by many factors (e.g., geometric orientation in the sky) beside the evolutionary stage, therefore statistical study and modeling is needed (Robitaille et al. 2007).

  2. 2.

    Mainly emitted from polycyclic aromatic hydrocarbons (PAHs) concentrated at 3.3, 6.2, 7.7, 8.6, and 11.2 \(\upmu \)m (Tielens 2008).

  3. 3.

    In fact, signals beyond the FWHM size is received as well, but dramatically attenuated. In some rare cases, if the signal is strong (e.g., masers) it can affect the source within the FoV (e.g., Sects. 4.2.2 and 5.3.3).

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  1. European Southern Observatory (ESO), Garching bei München, Germany

    Ke Wang

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Wang, K. (2015). Scientific Background. In: The Earliest Stages of Massive Clustered Star Formation: Fragmentation of Infrared Dark Clouds. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44969-1_1

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