J/ApJ/774/117 HII region kinematic distances (Jones+, 2013) ================================================================================ H I absorption toward H II regions at small Galactic longitudes. Jones C., Dickey J.M., Dawson J.R., McClure-Griffiths N.M., Anderson L.D., Bania T.M. =2013ApJ...774..117J ================================================================================ ADC_Keywords: H II regions ; Radio continuum ; Stars, distances Keywords: Galaxy: structure; H II regions Abstract: We make a comprehensive study of H I absorption toward H II regions located within |l|<10{deg}. Structures in the extreme inner Galaxy are traced using the longitude-velocity space distribution of this absorption. We find significant H I absorption associated with the Near and Far 3kpc Arms, the Connecting Arm, Bania's Clump 1, and the HI Tilted Disk. We also constrain the line-of-sight distances to H II regions, by using H I absorption spectra together with the H II region velocities measured by radio recombination lines. Description: Radio continuum maps were sourced from the NRAO VLA Sky Survey (NVSS; Condon et al. 1998, VIII/65) and the Southern Galactic Plane Survey (SGPS; McClure-Griffiths et al. 2005ApJS..158..178M). HI absorption spectra were extracted from the two SGPS data sets (5<|l|<10) and the ATCA HIGCS (5<|l|; McClure-Griffiths et al. 2012ApJS..199...12M). Observations for the SGPS (I and II) and ATCA HIGCS were performed with the Australia Telescope Compact Array (ATCA) and supplemented with data from the Parkes Radio Telescope. The Green Bank Telescope HII Region Discovery Survey (GBTHRDS; Anderson et al. 2011, J/ApJS/194/32) covered 34350%) in their calculated D_los_ value (see Section 7.1.1). Note (3): * = Errors which are >100%; note that while these errors are large, the significance of the KDAR remains. -------------------------------------------------------------------------------- Global note: Note (G1): References for V_RRL_ are as follows: 1 = Green Bank Telescope HII Region Discovery Survey (GBTHRDS); Anderson et al. 2011, J/ApJS/194/32; 2 = Lockman 1989, VIII/58; 3 = Caswell & Haynes 1987, J/A+A/171/261; 4 = Downes et al. 1980A&AS...40..379D 5 = Lockman et al. 1996ApJ...472..173L 6 = Wink et al. 1982A&A...108..227W -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Emmanuelle Perret [CDS] 03-Mar-2015