Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26..158b&link_type=abstract
XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S
Astronomy and Astrophysics
Astronomy
Scientific paper
We present a 2'-resolution, 43 GHz continuum map of the free-free radio emission of the complex RCW95 made with the 14-meter antennae of the Itapetinga radio observatory in Brazil. RCW95 is a small cloud (10'×10') with coordinates α = 15^{h}44^{m}43^{s} and δ = - 54°05'54'', associated with the radio source G326.7+0.6 and identified as an optical HII region by Rodgers et al. (1960). The region encloses three strong IRAS point sources (IRAS 15408-5356, 15411-5352 and 15412-5359) with colours of compact HII regions. This work was motivated by recent studies of the stellar population of the IRAS source 15408 (Roman-Lopes & Abraham 2004) that revealed that the source is a site of ongoing massive star formation. Previous mapping of the region were conducted by Goss & Shaver (1970) in 5 GHz with low resolution and detected strong continuum emission in this direction, but could not resolve the individual sources. In this mapping we were able to separate the emission of each HII region, identifying the radio counterparts to the IRAS sources and deriving fluxes of 7.3+/-0.3 and 3.4+/-0.5 Jy for IRAS 15408 and 15411, respectively, and an upper limit of 2.0 Jy for the flux of IRAS15412. We could also identify the radio continuum counterpart of the methanol maser detected by Ellingsen et al. (1996), firstly associated by its discoverers with IRAS15408. Finally, we report the results of an unpublished 22.2 GHz water maser survey that resulted on the identification of 7 different emission lines associated with all three IRAS sources in the region, closing the long debate on the nature of IRAS15411-5352 and supporting evidence for IRAS15412 being another star-formation site in the region.
Abraham Zulema
Barres de Almeida Ulisses
Roman-Lopes Alexandre
No associations
LandOfFree
Radiofrequency Mapping of Compact HII Regions: The RCW95 Complex does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Radiofrequency Mapping of Compact HII Regions: The RCW95 Complex, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiofrequency Mapping of Compact HII Regions: The RCW95 Complex will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1478826