A GLIMPSE of the Southern Jellyfish Nebula and Its Massive YSO

Details A GLIMPSE of the Southern Jellyfish Nebula and Its Massive YSO A GLIMPSE of the Southern Jellyfish Nebula and Its Massive YSO

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...656..242m&link_type=abstract

The Astrophysical Journal, Volume 656, Issue 1, pp. 242-247.

Astronomy and Astrophysics

Astronomy

5

Galaxy: General, Ism: H Ii Regions, Infrared: Ism, Infrared: Stars, Stars: Distances, Stars: Formation

Scientific paper

In Spitzer/IRAC images obtained under the GLIMPSE Legacy Survey, we have identified a unique and provocative nebular object we call the ``Southern Jellyfish Nebula.'' The Southern Jellyfish Nebula is characterized by a fan of narrow tendrils with extreme length-to-width ratios that emanate from the vicinity of a bright infrared point source embedded in a smaller resolved nebula. From CO observations of the Nebula's morphologically associated molecular cloud, we have derived a kinematic distance of 5.7+/-0.8 kpc and a cloud mass of 3.2+/-0.9×103 Msolar. The tendril-like ropes of the Nebula have widths of ~0.1 pc and lengths of up to ~2 pc. We have integrated the infrared spectral energy distribution (SED) of the point source to establish it as a massive young stellar object (MYSO), most likely forming alone, but possibly masking fainter cluster members. The shape of the SED is consistent with the shape of a late Class 0 SED model. Based on its far-IR luminosity of 3.3+/-0.9×104 Lsolar, the Southern Jellyfish's MYSO has a zero-age main sequence (ZAMS) spectral type of B0. Given the curious nature of this nebula, we suspect its peculiar IR-bright structure is directly related to its current state of star formation.

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