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A Glimpse of the Southern Jellyfish Nebula and Its Massive YSO


Mercer, EP and Clemens, DP and Rathborne, JM and Meade, MR and Babler, BL and Indebetouw, R and Whitney, BA and Watson, C and Wolfire, MG and Wolff, MJ and Bania, TM and Benjamin, RA and Cohen, M and Dickey, JM and Jackson, JM and Kobulnicky, HA and Mathis, JS and Stolovy, SR and Uzpen, B and Churchwell, EB, A Glimpse of the Southern Jellyfish Nebula and Its Massive YSO, The Astrophysical Journal, 656, (1) pp. 242-247. ISSN 0004-637X (2007) [Refereed Article]

DOI: doi:10.1086/510302


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 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. © 2007. The American Astronomical Society. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Dickey, JM (Professor John Dickey)
ID Code:45538
Year Published:2007
Web of Science® Times Cited:5
Deposited By:Physics
Deposited On:2007-08-01
Last Modified:2008-04-04

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