CARMA. CARMA 225 GHz map with 0.9’’ beam (C-array) 1’’ is not good enough! BN? source I.

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Presentation transcript:

CARMA

CARMA 225 GHz map with 0.9’’ beam (C-array) 1’’ is not good enough! BN? source I

subarcsec resolution requires adaptive optics to correct for atmospheric blurring blobs of water vapor signal delayed to this antenna differences from optical or NIR adaptive optics water vapor fluctuations are the main problem time scales of seconds, not milliseconds no laser guide stars

paired antenna calibration (PACS) observe nearby calibrator at 30 GHz with 3.5-m antennas 3.5-m ant quasarscience target

paired antenna calibration in action

1mm B-array map before/after PACS corrections

BN source I 229 GHz continuum map 0.15’’ resolution

a reminder: interferometer acts as a spatial filter

H recombination lines toward BN Rodriguez et al 2009 CARMA

CARMA SiO v= GHz, 0.4’’ res

SiO v=0 spectra suggest rotation about a NE-SW axis

CARMA SiO v=0 0.85’’ resolution

turnstile junction OMT Navarrini & Plambeck 2006, IEEE-MTT, 54,

1mm OMT Navarrini & Plambeck 2006, IEEE-MTT, 54, 272.

2008 summer school

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