J/ApJS/195/14 The Bolocam Galactic Plane Survey (BGPS). V. (Schlingman+, 2011) ================================================================================ The Bolocam Galactic Plane Survey. V. HCO^+^ and N_2_H^+^ spectroscopy of 1.1 mm dust continuum sources. Schlingman W.M., Shirley Y.L., Schenk D.E., Rosolowsky E., Bally J., Battersby C., Dunham M.K., Ellsworth-Bowers T.P., Evans II N.J., Ginsburg A., Stringfellow G. =2011ApJS..195...14S ================================================================================ ADC_Keywords: Spectra, millimetric/submm ; Surveys ; Interstellar medium Keywords: Galaxy: kinematics and dynamics - Galaxy: structure - ISM: clouds - ISM: kinematics and dynamics - stars: formation - submillimeter: ISM - surveys Abstract: We present the results of observations of 1882 sources in the Bolocam Galactic Plane Survey (BGPS) at 1.1mm with the 10m Henrich Hertz Telescope simultaneously in HCO^+^J=3-2 and N_2_H^+^J=3-2. We detect 77% of these sources in HCO^+^ and 51% in N_2_H^+^ at greater than 3{sigma}. We find a strong correlation between the integrated intensity of both dense gas tracers and the 1.1mm dust emission of BGPS sources. We determine kinematic distances for 529 sources (440 in the first quadrant breaking the distance ambiguity and 89 in the second quadrant). We derive the size, mass, and average density for this subset of clumps. The median size of BGPS clumps is 0.75pc with a median mass of 330M_{sun}_ (assuming T_Dust_=20K). BGPS clumps represent a wide range of objects (from dense cores to more diffuse clumps) and are typically characterized by larger sizes and lower densities than previously published surveys of high-mass star-forming regions. Description: Observations were conducted with HHT on Mount Graham, Arizona. The data were taken over the course of 44 nights beginning in 2009 February and ending in 2009 June. We selected sources out of a preliminary version of the BGPS source catalog (BOLOCAT; Rosolowsky et al. 2010, Cat. J/ApJS/188/123). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 178 1882 Results of HCO^+^ and N_2_H^+^ spectroscopy table5.dat 98 529 Table of computed quantities -------------------------------------------------------------------------------- See also: J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010) J/ApJ/638/293 : 1.1mm sources in the Perseus Molecular Cloud (Enoch+, 2006) J/ApJ/582/756 : Velocities of HII regions (Kolpak+, 2003) http://irsa.ipac.caltech.edu/data/BOLOCAM_GPS/ : The Bolocam GPS archive Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 15 A15 --- BGPS BGPS name (Bolocam Galactic Plane Survey) 17- 18 I2 h RAh Hour of Right Ascension (J2000) 20- 21 I2 min RAm Minute of Right Ascension (J2000) 23- 26 F4.1 s RAs Second of Right Ascension (J2000) 28 A1 --- DE- Sign of the Declination (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 32- 33 I2 arcmin DEm Arcminute of Declination (J2000) 35- 38 F4.1 arcsec DEs Arcsecond of Declination (J2000) 40- 46 F7.3 deg GLON Galactic longitude 48- 53 F6.3 deg GLAT Galactic latitude 55- 60 F6.1 arcsec Offset Offset to v1.0 62- 67 F6.3 Jy F1.1 The 1.1mm flux density; Jy/beam 69- 73 F5.3 Jy e_F1.1 ? Uncertainty in F1.1; Jy/beam 76 I1 --- n_THCO ?=0 HCO^+^ line flag (3) 78- 83 F6.3 K THCO ? The HCO^+^ beam temperature 85- 89 F5.3 K e_THCO ? Uncertainty in THCO (1) 91- 97 F7.3 K.km/s IHCO ? The HCO^+^ intensity 99-103 F5.3 K.km/s e_IHCO ? Uncertainty in IHCO (1) 105-110 F6.3 km/s WHCO ? The HCO^+^ FWHM 111 A1 --- f_WHCO [N] N: Indicates a "NaN" value for WHCO (2) 113-119 F7.3 km/s VHCO ? The HCO^+^ local standard of rest velocity 121 I1 --- n_TN2H ?=0 N_2_H^+^ line flag (3) 123-127 F5.3 K TN2H ? The N_2_H^+^ beam temperature 129-133 F5.3 K e_TN2H Uncertainty in TN2H (1) 135-140 F6.3 K.km/s IN2H ? The N_2_H^+^ intensity 142-146 F5.3 K.km/s e_IN2H Uncertainty in IN2H (1) 148-153 F6.3 km/s WN2H ? The N_2_H^+^ FWHM 155-161 F7.3 km/s VN2H ? The N_2_H^+^ local standard of rest velocity 163-168 F6.4 kpc Dnear ? Near kinematic distance 170-176 F7.4 kpc Dfar ? Far kinematic distance 178 I1 --- n_Dfar ?=0 Reference for distance estimation (G1) -------------------------------------------------------------------------------- Note (1): For entries with no measured line, the flux value is blank but the error on the baseline is provided. Note (2): The measured linewidth is less than the channel width. The upper limit is 1.12km/s. Note (3): Line flags as follows (table2 of paper): 0 = No detection: there is no visible line 1 = Single detection: one line visible with no visible structure 2 = Multiple detections: more than one line is visible in the spectrum 4 = Obvious line wings: one line that shows a possible line wing(s) 5 = Self-absorbed profile: one line that shows a possible self-absorbed profile 9 = Unusable data: both polarizations have defects that make the spectrum unusable -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 15 A15 --- BGPS BGPS name (1) 17- 23 F7.3 deg GLON Galactic longitude 25- 30 F6.3 deg GLAT Galactic latitude 32- 37 F6.3 Jy F1.1 The 1.1mm flux density (in Jy/beam) 39- 40 I2 --- Dflg [1/13] Reference for distance estimation (G1) 42- 46 I5 Msun Mass Estimated Mass 48- 53 F6.3 km/s WHCO The HCO^+^ FWHM 55- 61 F7.3 --- alpha Virial parameter {alpha} (2) 63- 70 F8.1 cm-3 Beam averaged density 72- 78 F7.1 cm-3 Volume averaged density 80- 84 F5.3 g/cm2 SDen Mass surface density {Sigma} 86- 91 F6.3 10+5yr t(ff) Clump free fall timescale 93- 98 F6.3 10+5yr t(cc) Clump crossing timescale -------------------------------------------------------------------------------- Note (1): Calculated quantities in this table assume T_d_=20K for all sources. Note (2): the virial parameter {alpha} is defined by {alpha}=5{Delta}v^2^/8ln(2{pi}G{Sigma}R), where v = observed velocity, {Sigma} = mass surface density, R = galactocentric distance. A value {alpha}<1 indicates a gravitationally bound clump. -------------------------------------------------------------------------------- Global notes: Note (G1): Flag as follows: 1 = Parallax; 2 = Infrared Dark Cloud (IRDC) Coincidence; 3 = Kolpak et al. (2003, Cat. J/ApJ/582/756); 4 = Shirley et al. (2003ApJS..149..375S); 5 = Tangent Distance; 6 = Outer Galaxy; 7 = W3/4/5 Region; 8 = NGC 7538 Region; 9 = Cygnus X Region; 10 = Outer Arm (Cyg X); 11 = IC1396; 12 = 3kpc Arm; 13 = Outer Arm. -------------------------------------------------------------------------------- History: * 19-Sep-2011: From electronic version of the journal * 01-Dec-2011: Note on the HCO/N2H detection fixed, as note (3) of table3 (thanks to a remark from a co-author) References: Aguirre et al. Paper I. 2011ApJS..192....4A Rosolowsky et al. Paper II. 2010ApJS..188..123R Cat. J/ApJS/188/123 Dunham et al. Paper III. 2010ApJ...717.1157D Bally et al. Paper IV. 2010ApJ...721..137B Cat. J/ApJ/721/137 Schlingman et al. Paper V. 2011ApJS..195...14S Cat. J/ApJS/195/14 Dunham et al. Paper VII. 2011ApJ...741..110D Cat. J/ApJ/741/110 Ellsworth-Bowers et al. Paper VIII. 2013ApJ...770...39E Ginsburg et al. Paper IX. 2013ApJS..208...14G Shirley et al. Paper X. 2013ApJS..209....2S Cat. J/ApJS/209/2 Merello et al. Paper XI. 2015ApJS..218....1M Cat. J/ApJS/218/1 Ellsworth-Bowers et al. Paper XII. 2015ApJ...799...29E Cat. J/ApJ/799/29 Ellsworth-Bowers et al. Paper XIII. 2015ApJ...805..157E Cat. J/ApJ/805/157 Svoboda et al. Paper XIV. 2016ApJ...822...59S Cat. J/ApJ/822/59 ================================================================================ (End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 19-Sep-2011