Multi-wavelengthcarbonrecombinationlineobservationswiththeVLAtowardanUCHiiregioninW48Physicalpropertiesandkinematicsofneutralmater-北弘传媒著作.pdf

To appear in ApJ Multi-wavelength carbon recombination line observations with the VLA toward an UCH ii region in W48: Physical properties and kinematics of neutral material D. Anish Roshi Raman Research Institute, Sadashivanagar, Bangalore, India 560080, anish@rri.res.in and 1 National Radio Astronomy Observatory , Green Bank, USA W. M. Goss National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801, USA; mgoss@nrao.edu K. R. Anantharamaiah2 Raman Research Institute, Sadashivanagar, Bangalore, India 560080 and S. Jeyakumar3 Raman Research Institute, Sadashivanagar, Bangalore, India 560080 ABSTRACT Using the Very Large Array (VLA) the C76α and C53α recombination lines (RLs) have been detected toward the ultra-compact H ii region (UCH ii region) G35.20−1.74. We also obtained upper limits to the carbon RLs at 6 cm (C110α C111α) and 3.6 cm (C92α) wavelengths with the VLA. In addition, continuum images of the W48A complex ( which includes G35.20−1.74 ) are made with 1The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under a cooperative agreement by Associated Universities, Inc. 2Deceased 29 October, 2001 3Present address: Instituto de Geofisica, UNAM, Mexico 04521; sjk@soho.igeofcu.unam.mx