Workshop on Hyper-Compact HII regions
Wednesday 8 September 2010
Hyper-compact HII (HCHII) regions are an observable phase in the early stages of high-mass star formation and are thought to pinpoint the transition into the UCHII region phase. They are best identified through their rising radio continuum emission spectra, up to turnover frequencies of 30 GHz and above, and pose a puzzle for theoretical considerations of their structure and emission mechanisms.
For objects where the SED has been measured between 1 and 90 GHz, there is an excess emission at the higher frequencies that cannot be accounted for by a warm dust contribution alone. Moreover the data at the lower frequencies cannot distinguish between various theoretical models such as emission arising from trapped HII reigons or from low-temperature stellar winds. Better constraining the SED models with the current datasets is being hampered by the fact that the data points for almost all of the better-studied HCHII regions published so far have been collected from different epochs, different telescopes or non-complementary array configurations and in the case of Murphy et al. (2010) not adequately sampled in the image domain.
The goal of this 1-day workshop is to discuss a way forward in the observational studies of Hyper-Compact HII regions so that we can achieve a sample of Hyper Compact HII regions for which the SEDs have been consistently measured in the range 1 to 100 GHz. The Australia Telescope Compact Array is perfectly suited to this task and is well placed to do the ground work for follow-up studies using ALMA and SKA.
The workshop has been funded by the CSIRO Ruby Payne-Scott Award.
Wednesday 8 September 2010
The workshop will take place in Sydney the week before the conference Great Barriers in High-Mass Star Formation in Townsville.
Main Lecture Theatre
CASS (ATNF) Headquarters, Marsfield, Sydney
Marsfield is a residential suburb about 25 km north-west of the centre of Sydney. Further information is available in the online Visitors Guide to the ATNF Headquarters.
PROGRAM & PARTICIPANTS
A preliminary program (Program.pdf) with a list of participants is now available. There is still room in the program for a few more contributed talks. Email Kate Brooks with your request to contribute (include title and short abstract).
A dinner will take place after the workshop at Zaaffran in Darling Harbour. Email Kate to reserve your place in the group booking (max 30 people). The cost will be $48.90 per person for a banquet menu.
The workshop is open to anyone interested in the field of star formation. There is no formal registration process and no registration fee. For catering purposes please email Kate with your intention to attend the workshop and any dietary requirements you may have.
Discounted rates are available at the following hotels:
Grace Hotel($220 per night including breakfast). Situtated in the city centre close to bus and train.
Travelodge North Ryde ($145 per night including breakfast). Situtated close to Marsfield.
Robert Menzies Student Accommodation ($75 per night including all meals). Situated close to CASS Headquarters.
Contact Kate for help with your booking and securing the discount rate. Please note the CASS Marsfield onsite lodge is fully booked out.
Email: Kate.Brooks @ csiro.au
Talks available for download