Early CI and CO early results from Nanten2 towards Carina Photo: G. - PowerPoint PPT Presentation

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Early CI and CO early results from Nanten2 towards Carina Photo: G. Wong Introduction Carina What is it? Why are we observing it? Observations done towards the region Comparing Spectra to previous observations The

Early CI and CO early results from Nanten2 towards Carina Photo: G. Wong
Introduction ¤ Carina ¤ What is it? ¤ Why are we observing it? ¤ Observations done towards the region ¤ Comparing Spectra to previous observations
The Carina Nebula
What is it? ¤ Also known as the Great Nebula in Carina , the Eta Carina Nebula , or NGC 3372 , as well as " Grand Nebula ” ¤ Extreme stellar population (distance ~2.3 kpc of the sun). ¤ Evaporating the gas and dust reservoirs which young stars are trying to accrete. ¤ Up until recently, mid-1990s, Carina was viewed as an evolved HII region devoid of active star formation. ¤ Formation occurring on the edges of the nebula.
Why study it? ¤ Carina Nebular (NGC 3372) ideal location to study: ¤ Formation of stars (low and high mass) ¤ Stars being formed in molecular clouds about 5-10pc away from massive stars (Eta Carinae and HD 93129A) ¤ UV radiation and stellar winds ¤ An environment that will change rapidly when massive stars go supernova (1-2Myr) and form a giant superbubble ¤ Different stages of star formation has been observed in this region. ¤ Only can be observed in the Southern Hemisphere. ¤ Ionised hydrogen ¤ Atomic Carbon
What lines do we observe? ¤ CI 3P1-3P0 492 GHz 37 arcsec = 0.010 deg ¤ CI 3P2-3P1 809 GHz 22 arcsec ¤ CO J=4-3 460 GHz 39 arcsec = 0.011 deg ¤ CO J=7-6 806 GHz 22 arcsec = 0.006 deg ¤ Started observations in CI 3P1-3P0 (492 GHz) and more recently CO 4-3 (460 GHz) ¤ For more information: http://www.astro.uni-koeln.de/nanten2/node/173
12 CO 1-0 image taken from Mopra. Overlaid with footprints for observations with NANTEN2.
Water Vapor
12 CO 1-0 (Mopra) CO 4-3 (Nanten2)
12 CO 1-0 (Mopra) 2008: CO 4-3 (Nanten2) 2013: CO 4-3 (Nanten2)
12 CO 1-0 (Mopra) CI 1-0 (Nanten2)
12 CO 1-0 (Mopra) 2008: CI 4-3 (green & black) 2013: CI 4-3 (blue)
WARNING! Scaling needed!
Sample spectra 12 CO 2-1
Sample spectra 2008 – CO4-3 CI 1-0
Spectra 2013, 2014 – CO4-3 CI 1-0
Next Steps ¤ Carina CI (3P1-3P0) and CO (4-3) ¤ check observed tiles ¤ Scaling factor ¤ check observed tiles ¤ Comparisons to previous observation ¤ Other observations! - Musca dark lane ¤ Collaboration with Nagoya Uni (Kengo Tachihara) ¤ CI (3P1-3P0) and CO (4-3) ¤ Compliment Nanten2 and Mopra observations ¤ Files uploaded to SMART and Wiki created

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