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MX002: Molecular Gas in the LMC

MX002: Molecular Gas in the LMC. MX002 observers in 2005: Juergen Ott, Tony Wong, Erik Muller, Jorge Pineda, Min Wang, Annie Hughes. Talk Outline. the MX002 project observations in 2005 the molecular ridge near 30 Doradus: mass function, X-factor, line profiles, ASTE/Mopra

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MX002: Molecular Gas in the LMC

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  1. MX002: Molecular Gas in the LMC MX002 observers in 2005: Juergen Ott, Tony Wong, Erik Muller,Jorge Pineda, Min Wang, Annie Hughes

  2. Talk Outline • the MX002 project • observations in 2005 • the molecular ridge near 30 Doradus: • mass function, X-factor, line profiles, ASTE/Mopra • the inner LMC • plans for 2006 Annie Hughes, UNSW 3mm workshop, November 2005

  3. MX002 Overview 12CO(J=1-0) survey of the Magellanic System (LMC+SMC+MB) Scientific Motivations • Molecular cloud formation and evolution • Initial stages of star formation • Low-Z, high-UV replicates high-z conditions Annie Hughes, UNSW 3mm workshop, November 2005

  4. MX002 Overview Why the LMC? • unique opportunity for southern telescopes • low metallicity ~0.3Z, emulating conditions at high-z • high angular resolution + overview of dynamics in whole galaxy • existing HI dataset • 30 Doradus - an exciting molecular gas laboratory! Annie Hughes, UNSW 3mm workshop, November 2005

  5. Observation Strategy • OTF mapping ~120 5’x5’ fields • CO(J=1-0) (115.271 GHz) • mostly old correlator/RX • ~100 minutes per field • BW~64 MHz • Δv= ~0.16 km/s • RMS~0.4 K • beam FWHM ~ 30” • Tsys @115 GHz ~600 K • mostly extragalactic “green-time” Annie Hughes, UNSW 3mm workshop, November 2005

  6. The Molecular Ridge • ridge + arc ~ 35% of LMC molecular gas Annie Hughes, UNSW 3mm workshop, November 2005

  7. The Molecular Ridge Annie Hughes, UNSW 3mm workshop, November 2005

  8. The Molecular Ridge Annie Hughes, UNSW 3mm workshop, November 2005

  9. The Molecular Ridge Annie Hughes, UNSW 3mm workshop, November 2005

  10. The Molecular Ridge Annie Hughes, UNSW 3mm workshop, November 2005

  11. α ~ 1.5 α ~ 1.6 Clump Mass Spectrum Analysis by Jorge Pineda & Juergen MVIR~R(ΔV)2,dN/dMVIR M MW α = 1.6-1.8, NANTEN LMC α = 1.9 Annie Hughes, UNSW 3mm workshop, November 2005

  12. XCO factor Analysis by Jorge Pineda & Juergen XCO=NH2/ICO NH2 ~R(ΔV)/R2 XCO~ΔV/(RTb) Annie Hughes, UNSW 3mm workshop, November 2005

  13. Comparison with ASTE Analysis by Tony and Yojhi Annie Hughes, UNSW 3mm workshop, November 2005

  14. Comparison with ASTE Analysis by Tony and Yojhi Annie Hughes, UNSW 3mm workshop, November 2005

  15. central R~1.2 kpc • relationship between atomic and molecular gas, focusing on pressure and dynamics • includes star-forming and non-SF clouds Inner LMC Survey Annie Hughes, UNSW 3mm workshop, November 2005

  16. Preliminary Results Annie Hughes, UNSW 3mm workshop, November 2005

  17. Preliminary Results

  18. Plans for 2006+ • molecular ridge mapping is complete • continue inner LMC mapping • Mopra follow-up 3mm multi-line survey of ridge clouds to investigate physical parameters as function of the UV radiation field • ATCA follow-up of ridge clouds • NANTEN2/ASTE/APEX Annie Hughes, UNSW 3mm workshop, November 2005

  19. Finally… …a huge thank you to everyone involved in the Mopra upgrade! Annie Hughes, UNSW 3mm workshop, November 2005

  20. Appendix Annie Hughes, UNSW 3mm workshop, November 2005

  21. A Big Mess? Annie Hughes, PhD Progress Review, November 2005

  22. Preliminary Results Annie Hughes, UNSW 3mm workshop, November 2005

  23. Preliminary Results Annie Hughes, UNSW 3mm workshop, November 2005

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