Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-12-18
Astronomy and Astrophysics
Astrophysics
9 pages, 5 Figures, To be published in "A Long Walk Through Astronomy: A Celebration of Luis Carrasco's 60th Birthday", procee
Scientific paper
We present the results of a morphological study performed to a sample of Ultracompact (UC) HII regions with Extended Emission (EE) using Spitzer--IRAC imagery and 3.6 cm VLA conf. D radio-continuum (RC) maps. Some examples of the comparison between maps and images are presented. Usually there is an IR point source counterpart to the peak(s) of RC emission, at the position of the UC source. We find that the predominant EE morphology is the cometary, and in most cases is coincident with IR emission at 8.0 $\mu$m. Preliminary results of Spitzer--IRAC photometry of a sub-sample of 13 UC HII regions with EE based on GLIMPSE legacy data are also presented. Besides, individual IRAC photometry was performed to 19 UC sources within these 13 regions. We show that UC sources lie on specific locus, both in IRAC color-color and AM-product diagnostic diagrams. Counts of young stellar sources are presented for each region, and we conclude that a proportion of ~ 2%, ~10%, and ~88% of sources in the UC HII regions with EE are, in average, Class I, II, and III, respectively.
Franco Jose
Grave J. M. C.
Kemp Simon
Kumar M. S. N.
Kurtz Stan
No associations
LandOfFree
Spitzer--IRAC Imagery and Photometry of Ultracompact HII Regions With Extended Emission 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 Spitzer--IRAC Imagery and Photometry of Ultracompact HII Regions With Extended Emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer--IRAC Imagery and Photometry of Ultracompact HII Regions With Extended Emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-172660