Open Access Repository

A glimpse of the Southern Jellyfish Nebula and its massive YSO


Downloads per month over past year

Mercer, EP, Wolff, MJ, Bania, TM, Benjamin, RA, Cohen, M, Dickey, JM, Jackson, JM, Kobulnicky, HA, Mathis, JS, Stolovy, SR, Uzpen, B, Clemens, DP, Churchwell, EB, Rathborne, JM, Meade, MR, Babler, BL, Indebetouw, R, Whitney, BA, Watson, C and Wolfire, MG 2007 , 'A glimpse of the Southern Jellyfish Nebula and its massive YSO' , The Astrophysical Journal, vol. 656, no. 1 , pp. 242-247 , doi: 10.1086/510302.

[img] PDF
4098.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.


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’sMYSO 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.

Item Type: Article
Authors/Creators:Mercer, EP 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 Clemens, DP and Churchwell, EB and Rathborne, JM and Meade, MR and Babler, BL and Indebetouw, R and Whitney, BA and Watson, C and Wolfire, MG
Journal or Publication Title: The Astrophysical Journal
Publisher: University of Chicago Press
ISSN: 0004-637X
DOI / ID Number: 10.1086/510302
Additional Information:

© 2007. The American Astronomical Society.

Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page