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Related Experiment Videos

Large-Scale Structure of the Carina Nebula.

Smith, Egan, Carey

    The Astrophysical Journal
    |March 15, 2000
    PubMed
    Summary

    Midcourse Space Experiment (MSX) satellite observations reveal the Carina Nebula

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    Area of Science:

    • Astronomy
    • Astrophysics
    • Nebular Physics

    Background:

    • The Carina Nebula (NGC 3372) is a giant H II region, traditionally considered an evolved star-forming region.
    • Previous understanding suggested limited ongoing star formation, with the nebula clearing its natal molecular cloud.
    • The nebula's large-scale structure was not fully understood in the mid-infrared spectrum.

    Purpose of the Study:

    • To investigate the complex mid-infrared morphology of the entire Carina Nebula using MSX satellite data.
    • To identify potential sites of ongoing or triggered star formation within NGC 3372.
    • To analyze the interaction between infrared sources and the massive stellar population.

    Main Methods:

    • Utilized Midcourse Space Experiment (MSX) satellite data for mid-infrared observations.
    • Analyzed the thermal infrared emission across the entire Carina Nebula.
    • Examined the morphology of embedded infrared sources and their spatial relationship to dust pillars and ionization fronts.

    Main Results:

    • Revealed a coherent bipolar structure for the Carina Nebula on a ~100 pc scale, with its major axis perpendicular to the Galactic plane.
    • Identified numerous embedded infrared sources, challenging the notion of a quiescent star-forming region.
    • Located several compact infrared sources at the heads of dust pillars and behind ionization fronts.

    Conclusions:

    • The Carina Nebula exhibits a complex bipolar morphology in the mid-infrared.
    • The identified embedded infrared sources are strong candidates for active star formation.
    • These sources may represent sites of triggered star formation due to interactions with massive stars in NGC 3372.

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