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J/A+A/615/A103  CORNISH project. III. UCHII region catalogue  (Kalcheva+, 2018)

The Coordinated Radio and Infrared Survey for High-mass star formation. III. A catalogue of northern ultra-compact H II regions. Kalcheva I.E., Hoare M.G., Urquhart J.S., Kurtz S., Lumsden S.L., Purcell C.R., Zijlstra A.A. <Astron. Astrophys. 615, A103 (2018)> =2018A&A...615A.103K (SIMBAD/NED BibCode)
ADC_Keywords: H II regions ; Surveys ; Radio continuum ; Photometry, infrared Keywords: stars: formation - ISM: H II regions - radio continuum: ISM Abstract: A catalogue of 239 ultra-compact HII regions (UCHIIs) found in the CORNISH survey at 5GHz and 1.5-arcsec resolution in the region 10°<l<65°, |b|<1° is presented. This is the largest complete and well-selected sample of UCHIIs to date and provides the opportunity to explore the global and individual properties of this key state in massive star formation at multiple wavelengths. The nature of the candidates was validated, based on observational properties and calculated spectral indices, and the analysis is presented in this work. The physical sizes, luminosities and other physical properties were computed by utilising literature distances or calculating the distances whenever a value was not available. The near- and mid-infrared extended source fluxes were measured and the extinctions towards the UCHIIs were computed. The new results were combined with available data at longer wavelengths and the spectral energy distributions (SEDs) were reconstructed for 177 UCHIIs. The bolometric luminosities obtained from SED fitting are presented. By comparing the radio flux densities to previous observational epochs, we find about 5% of the sources appear to be time variable. This first high-resolution area survey of the Galactic plane shows that the total number of UCHIIs in the Galaxy is ∼750 - a factor of 3-4 fewer than found in previous large area radio surveys. It will form the basis for future tests of models of massive star formation. Description: The electronic version contains the multi-wavelength and physical properties of the confirmed CORNISH UCHII regions, as derived in this work. A broken-down version of the full UCHII table is also available in the arXiv preprint (Appendices B-D: Radio fluxes and spectral indices; Extended IR source fluxes - GLIMPSE and UKIDSS; Distances and physical properties). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file uchiicat.dat 448 239 CORNISH ultra-compact HII region (UCHII) catalogue with derived multi-wavelength and physical properties
See also: II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008) II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+, 2012) J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+, 1994) J/ApJS/91/659 : Ultracompact HII regions radio images (Kurtz+, 1994) J/AJ/129/348 : Radio compact HII regions in the Milky Way (Giveon+, 2005) J/AJ/130/586 : Compact radio sources in the galactic plane (White+, 2005) J/AJ/131/2525 : MAGPIS 20cm survey (Helfand+, 2006) J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010) J/ApJS/208/11 : The Red MSX Source Survey: massive protostars (Lumsden+ 2013) J/MNRAS/435/400 : ATLASGAL properties of compact HII regions (Urquhart+, 2013) J/A+A/579/A71 : Infrared emission of young HII regions (Cesaroni+, 2015) J/ApJS/205/1 : CORNISH project. II. Source catalog (Purcell+, 2013) http://cornish.leeds.ac.uk/ : CORNISH home page Byte-by-byte Description of file: uchiicat.dat
Bytes Format Units Label Explanations
1- 17 A17 --- CORNISH Unique name from Galactic coordinates (GLLL.llll+BB .bbbb) 19- 27 F9.5 deg RAdeg [272.1/296.8] Right Ascension (J2000) 29- 37 F9.5 deg DEdeg [-20.2/26] Declination (J2000) 39- 42 F4.2 arcsec e_RAdeg [0.1/2.2] Uncertainty in right ascension 44- 47 F4.2 arcsec e_DEdeg [0.1/2.2] Uncertainty in declination 49- 56 F8.2 mJy SC [3.3/12616.4] CORNISH 5GHz integrated flux density from Paper II (1) 58- 64 F7.2 mJy e_SC [0.7/1121] Uncertainty in CORNISH 5GHz flux density from Paper II (1) 65 A1 --- l_SM6 3-sigma upper limit flag for SM6 66- 73 F8.2 mJy SM6 [2/26528.2]? Remeasured MAGPIS 5GHz integrated flux density 75- 80 F6.2 mJy e_SM6 [0.6/104]? Uncertainty in MAGPIS 5GHz integrated flux density 81 A1 --- l_SM20 3-sigma upper limit flag for SM20 82- 88 F7.2 mJy SM20 ? Remeasured MAGPIS 1.4GHz integrated flux density 90- 95 F6.2 mJy e_SM20 ? Uncertainty in MAGPIS 1.4GHz integrated flux density 97-101 F5.2 --- Sp+IndCM20 [-2.1/2.2]? Spectral index between 5GHz (CORNISH images) and 1.4GHz (MAGPIS images) 103-106 F4.2 --- e_Sp+IndCM20 [0.07/0.3]? Uncertainty in spectral index 108-114 F7.2 mJy S3.6 [1.6/1899]? Spitzer/IRAC 3.6um flux of extended source 116-121 F6.2 mJy e_S3.6 [0.5/430]? Uncertainty in 3.6 micron flux of extended source 123-129 F7.2 mJy S4.5 ? Spitzer/IRAC 4.5um flux of extended source 131-136 F6.2 mJy e_S4.5 ? Uncertainty in 4.5 micron flux of extended source 138-145 F8.2 mJy S5.8 ? Spitzer/IRAC 5.8um flux of extended source 147-153 F7.2 mJy e_S5.8 ? Uncertainty in 5.8 micron flux of extended source 155-162 F8.2 mJy S8.0 ? Spitzer/IRAC 8.0um flux of extended source 164-170 F7.2 mJy e_S8.0 ? Uncertainty in 8.0 micron flux of extended source 172-176 F5.2 mag [3.6] ? Spitzer/IRAC AB magnitude from 3.6um flux 178-181 F4.2 mag e_[3.6] ? Uncertainty in AB magnitude from 3.6 micron flux 183-187 F5.2 mag [4.5] ? Spitzer/IRAC AB magnitude from 4.5um flux 189-192 F4.2 mag e_[4.5] ? Uncertainty in AB magnitude from 4.5 micron flux 194-198 F5.2 mag [5.8] ? Spitzer/IRAC AB magnitude from 5.8um flux 200-203 F4.2 mag e_[5.8] ? Uncertainty in AB magnitude from 5.8 micron flux 205-209 F5.2 mag [8.0] ? Spitzer/IRAC AB magnitude from 8.0um flux 211-214 F4.2 mag e_[8.0] ? Uncertainty in AB magnitude from 8.0 micron flux 216-220 F5.2 mJy SJneb ? J-band flux of nebula (subtracted stellar contamination) or 3-sigma flux upper limit if f_SJned=f 222-225 F4.2 mJy e_SJneb ? Uncertainty in J-band nebular flux 227-231 F5.2 mJy SHneb ? H-band flux of nebula (subtracted stellar contamination) or 3-sigma flux upper limit if f_SHned=f 233-237 F5.2 mJy e_SHneb ? Uncertainty in H-band nebular flux 239-244 F6.2 mJy SKneb ? K-band flux of nebula (subtracted stellar contamination) 246-250 F5.2 mJy e_SKneb ? Uncertainty in K-band nebular flux 252-256 F5.2 mag ABJneb ? AB magnitude from J-band nebular flux or 3-sigma flux upper limit if f_SJned=f 258-261 F4.2 mag e_ABJneb ? Uncertainty in J magnitude 263-267 F5.2 mag ABHneb ? AB magnitude from H-band nebular flux or 3-sigma flux upper limit if f_SHned=f 269-272 F4.2 mag e_ABHneb ? Uncertainty in H magnitude 274-278 F5.2 mag ABKneb ? AB magnitude from K-band nebular flux 280-283 F4.2 mag e_ABKneb ? Uncertainty in K magnitude 285-290 F6.2 mag AH [-12.4/6.7]? H-band extinction 292-295 F4.2 mag e_AH [0.05/0.8]? Uncertainty in Ah 297-301 F5.2 mag AK ? K-band extinction 303-306 F4.2 mag e_AK ? Uncertainty in Ak 308-311 F4.2 mag J-H ? J-H colour of nebula in AB magnitudes 313-316 F4.2 mag e_J-H ? Uncertainty in J-H colour 318-323 F6.2 mag H-K ? H-K colour of nebula in AB magnitudes 325-328 F4.2 mag e_H-K ? Uncertainty in H-K colour 330-334 F5.2 mag AV(J-H) ? Visual extinction from J-H nebular colour (AB mags) 336-339 F4.2 mag e_AV(J-H) ? Uncertainty on visual extinction from J-H nebular colour 341-347 F7.2 mag AV(H-K) [-169.5/44]? Visual extinction from H-K nebular colour (AB mags) 349-353 F5.2 mag e_AV(H-K) ? Uncertainty on visual extinction from H-K nebular colour 355-359 F5.2 mag AV(H) [-8.1/59]? Visual extinction from intrinsic ratio between H-band flux and 5GHz flux (AB mags) 361-364 F4.2 mag e_AV(H) [0.4/6.3]? Uncertainty on AV(H) 366-371 F6.2 mag AV(K) ? Visual extinction from intrinsic ratio between K-band and 5GHz flux (AB mags) 373-376 F4.2 mag e_AV(K) ? Uncertainty on AV(K) 378 A1 --- f_SJneb [f/t] If FALSE, a J-band nebula is not visible and the value represents a 3-sigma flux upper limit 380 A1 --- f_SHneb [f/t] If FALSE, an H-band nebula is not visible and the value represents a 3-sigma flux upper limit 382 A1 --- f_SKneb [t] If FALSE, a K-band nebula is not visible and the value represents a 3-sigma flux upper limit 384-388 F5.2 kpc dhkpc [1.9/18.6]? Heliocentric distance 390 A1 --- newdh? [f/t] If TRUE, the heliocentric distance was computed in this work (KDA-resolved) 392 A1 --- RMSdh? [f/t] If TRUE, the heliocentric distance was adopted from the RMS database (Lumsden et al., 2013, Cat. J/ApJS/208/11) 394 A1 --- HiGALdh? [f/t] If TRUE, the heliocentric distance was adopted from Cesaroni et al., 2015, Cat. J/A+A/579/A71 (and is a FAR distance) 396 A1 --- AGALdh? [f/t] If TRUE, the heliocentric distance was adopted from ATLASGAL (Urquhart et al., 2013, Cat. J/MNRAS/435/400) 398-402 F5.2 kpc dGkpc [3/13.2]? Galactocentric distance computed from the heliocentric distance 404-408 F5.3 pc D(pc) [0.01/0.9]? Physical diameter (using angular diameter from Paper II) (1) 410 A1 --- l_D(pc) [f/t] If TRUE, the UCHII region is unresolved and hence the physical diameter value is an upper limit 412-415 F4.1 [ph/s] log(Ni) ? log10 of Lyman continuum flux 417-420 F4.2 [pc/cm+6] log(EM) ? log10 of Emission measure 422-425 F4.2 [cm-3] log(ne) ? log10 of Electron density 427-430 F4.2 [K] log(Tb) log10 of 5GHz brightness temperature 432-436 F5.3 [K] e_log(Tb) Uncertainty on log(Tb) 438-443 F6.4 --- tau Optical depth at 5GHz, assuming electron temperature of 104K 445-448 F4.2 [Lsun] log(Lbol) ? log10 of Bolometric luminosity from SED fitting
Note (1): see Paper II, Purcell et al., 2013, Cat. J/ApJS/205/1.
Acknowledgements: Ivayla E. Kalcheva, pyiek(at)leeds.ac.uk References: Hoare et al. Paper I. 2012PASP..124..939H Purcell et al. Paper II. 2013ApJS..205....1P, Cat. J/ApJS/205/1
(End) Ivayla Kalcheva [Leeds, UK], Patricia Vannier [CDS] 07-Apr-2018
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