Volume 540, April 2012
|Number of page(s)||6|
|Section||Interstellar and circumstellar matter|
|Published online||04 April 2012|
The discovery based on GLIMPSE data of a protostar driving a bipolar outflow
1 National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, 100012 Beijing, PR China
2 Department of Physics, The University of Hong Kong, Hong Kong, PR China
3 Centre for Astrophysics and Planetary Science, School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NR, UK
Received: 9 August 2011
Accepted: 2 January 2012
We report the discovery based on GLIMPSE data of a proto-stellar system driving a bipolar outflow. The bipolar outflow closely resembles the shape of an hourglass in the infrared. The total luminosity of Ltotal = 5507 L⊙, derived from IRAS fluxes, indicates the ongoing formation of a massive star in this region. The spectral energy distribution (SED) of the driving source is fitted with an online SED fitting tool, which results in a spectral index of about 1.2. This, along with the presence of a bipolar outflow, suggests the detection of a Class I protostar. The driving source indicates prominent infrared excesses in color-color diagrams based on archived 2 MASS and GLIMPSE data, which is in line with an early evolutionary stage of the system.
Key words: ISM: jets and outflows / stars: early-type / stars: formation / stars: protostars
© ESO, 2012
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