E. P. Mercer et al. 2007 ApJ 656 242 doi:10.1086/510302
A GLIMPSE of the Southern Jellyfish Nebula and Its Massive YSO
FREE ISSUEE. P. Mercer1, D. P. Clemens1, J. M. Rathborne1, M. R. Meade2, B. L. Babler2, R. Indebetouw3, B. A. Whitney4, C. Watson5, M. G. Wolfire6, M. J. Wolff4, T. M. Bania1, R. A. Benjamin7, M. Cohen8, J. M. Dickey9, J. M. Jackson1, H. A. Kobulnicky10, J. S. Mathis2, S. R. Stolovy11, B. Uzpen10 and E. B. Churchwell2
Show affiliationsIn 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 M
. 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 L, 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.
- Subject headings
Galaxy: general; H II regions; infrared: ISM; infrared: stars; stars: distances; stars: formation
- Dates
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Issue 1 (2007 February 10)
Received 2006 July 14, accepted for publication 2006 October 18
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A GLIMPSE of the Southern Jellyfish Nebula and Its Massive YSO
E. P. Mercer et al. 2007 ApJ 656 242
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