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J/MNRAS/458/3619    Planck ERCSC sources with 100 GHz flux excess  (Chen+, 2016)

The bandmerged Planck Early Release Compact Source Catalogue: probing sub-structure in the molecular gas at high Galactic latitude. Chen X., Chary R., Pearson T.J., Mcgehee P., Fowler J.W., Helou G. <Mon. Not. R. Astron. Soc., 458, 3619-3632 (2016)> =2016MNRAS.458.3619C (SIMBAD/NED BibCode)
ADC_Keywords: Millimetric/submm sources ; Surveys ; Radio continuum Keywords: radiation mechanisms: general - catalogues - surveys - radio continuum: galaxies Abstract: The Planck Early Release Compact Source Catalogue (ERCSC) includes nine lists of highly reliable sources, individually extracted at each of the nine Planck frequency channels. To facilitate the study of the Planck sources, especially their spectral behaviour across the radio/infrared frequencies, we provide a 'bandmerged' catalogue of the ERCSC sources. This catalogue consists of 15191 entries, with 79 sources detected in all nine frequency channels of Planck and 6818 sources detected in only one channel. We describe the bandmerging algorithm, including the various steps used to disentangle sources in confused regions. The multifrequency matching allows us to develop spectral energy distributions of sources between 30 and 857GHz, in particular across the 100GHz band, where the energetically important CO J=1->0 line enters the Planck bandpass. We find ∼3σ-5σ evidence for contribution to the 100GHz intensity from foreground CO along the line of sight to 147 sources with |b|>{30deg}. The median excess contribution is 4.5±0.9 per cent of their measured 100 GHz flux density which cannot be explained by calibration or beam uncertainties. This translates to 0.5±0.1K.km/s of CO which must be clumped on the scale of the Planck 100GHz beam, i.e. ∼10-arcmin. If this is due to a population of low-mass (∼15M) molecular gas clumps, the total mass in these clumps may be more than 2000 M. Further, high-spatial-resolution, ground-based observations of the high-latitude sky will help shed light on the origin of this diffuse, clumpy CO emission. Description: We have created a bandmerged catalogue of the Planck ERCSC in this paper, and we have shown how confusing cases, arising from the varying spatial resolution in the different bandpasses, can be handled in the process. We used the catalogue to probe the spectral types of the sources at different Planck frequencies. The flux densities in the Planck 100GHz bandpass are contaminated by CO J=1=>0 emission. We have shown that by simple interpolation between the 70 and 143GHz flux densities of individual sources, we can estimate the flux-density excess arising from the CO along the lines of sight. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 87 254 List of sources with 100 GHz flux excess in the Planck ERCSC
See also: VIII/88 : Planck Early Release Compact Source Catalogue (Planck, 2011) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 7 A7 --- --- [PLCKERC] 9- 22 A14 --- PLCKERC PLCKERC designation (GLL.ll+BB.bbb) 24- 25 I2 h RAh Right Ascension (J2000) 27- 28 I2 min RAm Right Ascension (J2000) 30- 31 I2 s RAs Right Ascension (J2000) 33 A1 --- DE- Declination sign (J2000) 34- 35 I2 deg DEd Declination (J2000) 37- 38 I2 arcmin DEm Declination (J2000) 40- 45 F6.2 Jy S70 70GHz flux density 47- 50 F4.2 Jy e_S70 Uncertainty to the 70 Hz flux density 52- 57 F6.2 Jy S100 100GHz flux density 59- 63 F5.2 Jy e_S100 Uncertainty to the 100GHz flux density 65- 70 F6.2 Jy S143 143GHz flux density 72- 75 F4.2 Jy e_S143 Uncertainty to the 143GHz flux density 77- 81 F5.2 Jy Sexcess Excess flux density at 100GHz 83- 87 F5.2 Jy e_Sexcess Uncertainty to the 100GHz excess flux density
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Feb-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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