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The g305 star-forming complex: Embedded massive star formation discovered by herschel hi-gal

Faimali, A., Thompson, M.A., Hindson, L., Urquhart, J.S., Pestalozzi, M., Carey, S., Shenoy, S., Veneziani, M., Molinari, S., Clark, J.S. and others. (2009) The g305 star-forming complex: Embedded massive star formation discovered by herschel hi-gal. In: Proceedings of the International Astronomical Union. 5 (S261). pp. 402-415. ISBN 978-0-521-76481-0. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)

Abstract

We present a Herschel far-infrared study towards the rich massive star-forming complex G305, utilizing PACS 70, 160 ?m and SPIRE 250, 350, and 500 ?m observations from the Hi-GAL survey of the Galactic plane. The focus of this study is to identify the embedded massive star-forming population within G305, by combining far-infrared data with radio continuum, H2O maser, methanol maser, MIPS and Red MSX Source survey data available from previous studies. By applying a frequentist technique we are able to identify a sample of the most likely associations within our multiwavelength data set, which can then be identified from the derived properties obtained from fitted spectral energy distributions (SEDs). By SED modelling using both a simple modified blackbody and fitting to a comprehensive grid of model SEDs, some 16 candidate associations are identified as embedded massive star-forming regions. We derive a two-selection colour criterion from this sample of log (F70/F500)=1 and log (F160/F350)=1.6 to identify an additional 31 embedded massive star candidates with no associated star formation tracers. Using this result we can build a picture of the presentday star formation of the complex, and by extrapolating an initial mass function, suggest a current population of 2×104 young stellar objects (YSOs) present, corresponding to a star formation rate (SFR) of 0.01-0.02M yr-1. Comparing this resolved SFR, to extragalactic SFR tracers (based on the Kennicutt-Schmidt relation), we find that the star formation activity is underestimated by a factor of?2 in comparison to the SFR derived from the YSO population. © 2012 The Authors.

Item Type: Conference or workshop item (Proceeding)
Uncontrolled keywords: Formation - HII regions - infrared; ISM; Methods; Statistical - stars
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 30 Nov 2015 16:19 UTC
Last Modified: 29 May 2019 16:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52236 (The current URI for this page, for reference purposes)
Urquhart, J.S.: https://orcid.org/0000-0002-1605-8050
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