HighMass Star Formation UKIDSS

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High-Mass Star Formation UKIDSS GLIMPSE Views

• Melvin Hoare
• University of Leeds

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Outline

• The RMS Survey
• Galaxy-wide survey for massive star forming
  regions
• UKIDSS and GLIMPSE views
• The CORNISH Survey
• High resolution radio continuum survey
• Summary

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The Red MSX Source (RMS) Survey

• MSX survey 8, 12, 14 and 21mm, 18² resolution,
  blt5o
• Colour-select massive YSO candidates from the MSX
  PSC and 2MASS near-IR survey
• Delivers 2000 candidates
• Many other object types with similar near- and
  mid-IR colours

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Massive YSOs
C stars
UCHII regions
OH/IR stars
PN
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Multi-wavelength Ground-based Follow-up Campaign

• Identify and eliminate confusing sources
• Begin characterisation of the massive YSOs
• Radio continuum, mm-line, mid- near-IR imaging,
  near-IR spectroscopy
• RMS Team
• Stuart Lumsden, Rene Oudmaijer, James Urquhart,
  Ant Busfield, Tamara King, Andrew Clarke, Joseph
  Mottram (Leeds)
• Toby Moore, James Allsop (Liverpool JMU)
• Cormac Purcell, Michael Burton (UNSW)
• Zhibo Jiang (PMO)

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UKIDSS GLIMPSE

• JHK
• Reddened photospheres (K excess)
• Reflection nebulae H II regions
• 3.6, 4.5mm
• Reddened photospheres and excesses
• 5.8, 8.0mm
• Circumstellar dust emission
• PAH emission (interfaces)

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G30.3829-0.1100 H II region young cluster
J
K
3 x 3
8
4.5mm
8.0mm
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• Central star K10.95
• AK1.4
• Kinematic d 5 or 9 kpc
• MK-3.95 or -5.20
• Sp Ty O8.5V or O3V
• LIR and S(5 GHz) ànear
• Radio line study ànear

Sewilo et al. (2004)
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G32.15120.1317 H II region exciting star(s)
K
8.0mm
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G31.58060.0757 YSO cluster?
J
K
3 x 3
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4.5mm
8.0mm
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G30.818402727 YSO
K
8.0mm
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SEDs
Robitaille et al. Model Fitter results to 2MASS,
MSX, TIMMI2, IRAS
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The CORNISH Survey
Co-Ordinated Radio N Infrared Survey for
High-mass star formation
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The Survey

• High spatial resolution VLA survey of the
  Galactic Plane
• 5 GHz, 1.5² resolution (B configuration)
• Covers northern Spitzer GLIMPSE survey
• 10oltllt65o, blt1o

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Observational Strategy

• 110 square degrees
• 8.5 primary beam
• 9000 fields in hexagonal pattern 7.4 spacing
• 2 x 1 minute pointing on each
• 400 hours in total
• 2 mJy 50 completeness limit

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CORNISH Science

• ID of radio loud/quiet objects in GLIMPSE
• UCHIIs/MYSOs
• PN/Proto-PN
• Be stars
• WR stars
• Active binaries
• X-ray sources
• Legacy science

H II region MYSO
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Summary

• RMS survey will deliver 1000 MYSOs
• UKIDSS GLIMPSE can characterise the MYSOs, RNe,
  clusters, H II regions stars
• Nebular, stellar, ISM AV values
• extinction structure
• Kinematic vs. photometric distances
• galactic structure
• LIR, radio, photometric spectral types
• Stellar atmospheres
• CORNISH will deliver complementary radio data

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