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 2018A&A...615A.103K (SIMBAD/NED BibCode)
ADC_Keywords: H II regions ; Surveys ; Radio continuum ; Radio sources ;
Photometry, infrared
Keywords: stars: formation - 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
uchiicat.dat 448 239 CORNISH ultra-compact HII region (UCHII) catalogue
with derived multi-wavelength and physical
properties
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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 : Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)
J/ApJS/208/11 : 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)
J/MNRAS/480/2423 : CORNISH project IV. Radio-selected galactic PN
(Irabor+, 2018)
http://cornish.leeds.ac.uk/ : CORNISH home page
Byte-by-byte Description of file: uchiicat.dat
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Bytes Format Units Label Explanations
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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 ? Remeasured MAGPIS 5GHz
integrated flux density
75- 80 F6.2 mJy e_SM6 ? 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 ? Spectral index between 5GHz
(CORNISH images) and 1.4GHz (MAGPIS images)
103-106 F4.2 --- e_Sp+IndCM20 ? Uncertainty in spectral index
108-114 F7.2 mJy S3.6 ? Spitzer/IRAC 3.6um flux of
extended source
116-121 F6.2 mJy e_S3.6 ? 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 ? H-band extinction
292-295 F4.2 mag e_AH ? 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) ? 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) ? Visual extinction from intrinsic
ratio between H-band flux and 5GHz flux
(AB mags)
361-364 F4.2 mag e_AV(H) ? 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
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Note (1): see Paper II, Purcell et al., 2013, Cat. J/ApJS/205/1.
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Acknowledgements:
Ivayla E. Kalcheva, pyiek(at)leeds.ac.uk
References:
Hoare et al. Paper I. 2012PASP..124..939H 2012PASP..124..939H
Purcell et al. Paper II. 2013ApJS..205....1P 2013ApJS..205....1P, Cat. J/ApJS/205/1
Irabor et al., Paper IV 2018MNRAS.480.2423I 2018MNRAS.480.2423I, Cat. J/MNRAS/480/2423
(End) Ivayla Kalcheva [Leeds, UK], Patricia Vannier [CDS] 07-Apr-2018