Description: We have updated the catalogs of Galactic HII regions, giant molecular clouds (GMCs), and 6.7-GHz methanol masers to outline the spiral structure of our Galaxy. The related parameters have been collected and (re)calculated based on the data in the literature. In particular, for each spiral tracer, we list the photometric or trigonometric distance, and/or the solutions of the kinematic distance ambiguity (KDA) when available. The kinematic distances when adopted are calculated using a flat rotation curve with two sets of R_0, {Theta}_0, and solar motions, where one set is the IAU standard and the other is from the new observational results. The rotation curve of Brand & Blitz (1993, Cat. J/A+A/275/67) is also used to derive the kinematic distances. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file tableA1.dat 237 4551 HII regions as tracers of spiral arms tableA2.dat 189 1348 Giant molecular clouds tableA3.dat 141 948 6.7-GHz methanol masers -------------------------------------------------------------------------------- Byte-by-byte Description of file: tableA1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- Seq Number of Galactic HII region 6- 12 F7.3 deg GLON Galactic longitude 13- 19 F7.3 deg GLAT Galactic latitude 22- 27 A6 --- Ref Reference for GLON and GLAT 29- 35 F7.2 km/s VLSR LSR radial velocity 38- 42 F5.2 km/s e_VLSR Uncertainty in VLSR 43- 47 I5 K Te LTE Electron Temperature 51- 53 A3 --- tel Abbreviations for telescopes 56- 70 A15 --- line Observed line(s) toward the HII region 72- 77 A6 --- Ref Reference for VLSR, e_VLSR and Te 79- 87 F9.4 Jy S Radio continuum flux density 88- 93 F6.3 GHz Freq Observation frequency of S 95-100 A6 --- Ref Reference for S and Freq 102-108 F7.3 kpc Dist Photometric or trigonometric distance 110-115 F6.3 kpc e_Dist Uncertainty in Dist 117-122 A6 --- Ref Reference for Dist and e_Dist 126-130 A5 --- Mark Note for the KDA (1) 133-169 A37 --- Note Reference(s) and notes 170-175 F6.2 kpc R8.5 Distance to the GC (2) 178-183 F6.2 kpc D8.5 Distance to the Sun (2) 186-191 F6.2 pc/cm^2 U8.5 Excitation parameter of HII region (2) 193-198 F6.2 kpc R8.3 Distance to the GC (3) 201-206 F6.2 kpc D8.3 Distance to the Sun (3) 209-214 F6.2 pc/cm^2 U8.3 Excitation parameter of HII region (3) 216-221 F6.2 kpc Rbb93 Distance to the GC (4) 224-229 F6.2 kpc Dbb93 Distance to the Sun (4) 232-237 F6.2 pc/cm^2 Ubb93 Excitation parameter of HII region (4) -------------------------------------------------------------------------------- Note (1): knear: the nearer kinematic distance is adopted kfar : the farther kinematic distance is adopted ktan : the tracer is located at the tangential point kout : the tracer is in the outer Galaxy n3kpc: the tracer is located in the Near 3 kpc Arm f3kpc: the tracer is located in the Far 3 kpc Arm Note (2): If the photometric or trigonometric distance is available for a tracer, we adopt it directly. The kinematic distances when adopted are calculated with a flat rotation curve with the IAU standard R_0 = 8.5 kpc and {Theta}_0 = 220 km/s and the standard solar motions. Note (3): The kinematic distances when adopted are calculated with a flat rotation curve with the new observed fundamental parameters R_0 = 8.3 kpc and {Theta}_0 = 239 km/s (Brunthaler et al., 2011AN....332..461B) and the solar motions of Schonrich et al. (2010MNRAS.403.1829S). Note (4): The kinematic distances when adopted are calculated with the rotation curve of Brand & Blitz (1993A&A...275...67B) with the IAU standard R_0 = 8.5 kpc and {Theta}_0 = 220 km/s and the standard solar motions. -------------------------------------------------------------------------------- Byte-by-byte Description of file: tableA2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 2- 8 F7.3 deg GLON Galactic longitude 10- 16 F7.3 deg GLAT Galactic latitude 18- 24 F7.2 km/s VLSR LSR radial velocity 26- 33 F8.2 10^3K.km/s/pc^2 L_CO Luminosity of CO emission line 34- 39 F6.2 kpc D_sun Distance to the Sun 41- 46 F6.2 10^5solMass M_GMC Mass of the GMC 48- 52 F5.2 deg dLon Cloud size in GLON direction 53- 57 F5.2 deg dLat Cloud size in GLAT direction 61- 67 F7.3 kpc Dist Photometric/trigonometric distance 69- 73 F5.2 kpc e_Dist Uncertainty in Dist 76- 82 A7 --- Ref Reference for Dist and e_Dist 85- 89 A5 --- Mark Note for the KDA 91-118 A28 --- Ref Reference(s) and notes 122-127 F6.2 kpc R8.5 Distance to the GC 130-135 F6.2 kpc D8.5 Distance to the Sun 138-143 F6.2 10^5solMass M8.5 Mass of the GMC 145-150 F6.2 kpc R8.3 Distance to the GC 153-158 F6.2 kpc D8.3 Distance to the Sun 161-166 F6.2 10^5solMass M8.3 Mass of the GMC 168-173 F6.2 kpc Rbb93 Distance to the GC 176-181 F6.2 kpc Dbb93 Distance to the Sun 184-189 F6.2 10^5solMass Mbb93 Mass of the GMC -------------------------------------------------------------------------------- Byte-by-byte Description of file: tableA3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 2- 8 F7.3 deg GLON Galactic longitude 9- 15 F7.3 deg GLAT Galactic latitude 18- 24 F7.2 km/s VLSR_m Median velocity of the maser lines 25- 31 F7.2 km/s VLSR_p Peak velocity of the maser lines 32- 37 A6 --- Ref Reference for GLON, GLAT and VLSR 39- 45 F7.3 kpc Dist Photometric/trigonometric distance 47- 51 F5.2 kpc e_Dist Uncertainty in Dist 55- 60 A6 --- Ref Reference for Dist and e_Dist 63- 67 A5 --- Mark Note for the KDA 69-102 A34 --- Ref Reference(s) and notes 104-109 F6.2 kpc R8.5 Distance to the GC 110-115 F6.2 kpc D8.5 Distance to the Sun 117-122 F6.2 kpc R8.3 Distance to the GC 123-128 F6.2 kpc D8.3 Distance to the Sun 130-135 F6.2 kpc Rbb93 Distance to the GC 136-141 F6.2 kpc Dbb93 Distance to the Sun ------------------------------------------------------------------------------- ================================================================================