J/A+A/551/A28ivo://CDS.VizieR/J/A+A/551/A28doi:10.26093/cds/vizier.35510028CDSTang X.D.Esimbek J.Zhou J.J.Wu G.Ji W.G.Okoh D.2018-03-15T08:39:55Z2018-01-18T14:34:40ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmolecular-cloudsco-line-emissionWe seek to understand how the 4.8GHz formaldehyde absorption line is distributed in the MON R2, S156, DR17/L906, and M17/M18 regions. More specifically, we look for the relationship among the H_2_CO, ^12^CO, and ^13^CO spectral lines. The four regions of MON R2 (60'x90'), S156 (50'x70'), DR17/L906 (40'x60'), and M17/M18 (70'x80') were observed for H_2_CO (beam 10'), H110{alpha} recombination (beam 10'), 6 cm continuum (beam 10'), ^12^CO (beam 1'), and ^13^CO (beam 1'). We compared the H_2_CO, ^12^CO, ^13^CO, and continuum distributions, and also the spectra line parameters of H_2_CO, ^12^CO, and ^13^CO. Column densities of H_2_CO, ^13^CO, and H_2_ were also estimated. We found out that the H_2_CO distribution is similar to the ^12^CO and the ^13^CO distributions on a large scale. The correlation between the ^13^CO and the H_2_CO distributions is better than between the ^12^CO and H_2_CO distributions. The H_2_CO and the ^13^CO tracers systematically provide consistent views of the dense regions. Their maps have similar shapes, sizes, peak positions, and molecular spectra and present similar central velocities and line widths. Such good agreement indicates that the H_2_CO and the ^13^CO arise from similar regions.2013A&A...551A..28Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/551/A28CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/551/A28https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/551/A28http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/551/A28https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/551/A28https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/551/A28http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/551/A28GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/551/A28/tableb1 (Source positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/551/A28/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/551/A28/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/551/A28/tableb1?GETtext/xml+votable180.050000true90.0-6.38310.0055555555555555566/14313 14745 21452 29452https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/551/A28?format=asciiRadiodefaultJ/A+A/551/A28/tableb1Source positionsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharRAhRight ascension (J2000)pos.eq.ra;meta.mainRmhRight ascension (J2000)minpos.eq.raintRAsRight ascension (J2000)spos.eq.raDEJ2000Declination (J2000)pos.eq.dec;meta.mainSizeRASize along RAarcminphys.angSizeintSizeDESize along DEarcminphys.angSizeintRefReferencesmeta.refcharJ/A+A/551/A28/tableb2Parameters of the H110{alpha} recombination lineOffYOffset in DEarcminpos.eq.dec;arith.diffintOffXOffset in RAarcminpos.eq.ra;arith.diffintTLH110{alpha} recombination line antenna temperatureKphot.antennaTempfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharFluxH110{alpha} recombination line fluxK.km/sphot.fluxfloate_Fluxrms uncertainty on FluxK.km/sstat.error;phot.fluxfloatVelH110{alpha} recombination line velocitykm/sspect.dopplerVelocfloate_Velrms uncertainty on Velkm/sstat.errorfloatWidthH110{alpha} recombination line widthkm/sspect.line.widthfloate_Widthrms uncertainty on Widthkm/sstat.error;spect.line.widthfloatTCH110{alpha} recombination line continuum brightness temperatureKphys.temperaturefloatT*eH110{alpha} recombination line local thermodynamic equilibrium (LTE) electron temperatureKphys.temperature;phys.electronintJ/A+A/551/A28/tableb3Parameters of the H_2_CO (1_10_-1_11_) absorption linerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharOffXOffset in RAarcminpos.eq.ra;arith.diffintOffYOffset in DEarcminpos.eq.dec;arith.diffintFlux? H_2_CO absorption line flux (1)K.km/sphot.fluxfloatnullablee_Flux? rms uncertainty on FluxK.km/sstat.error;phot.fluxfloatnullableVel? H_2_CO absorption line velocity (1)km/sspect.dopplerVelocfloatnullablee_Vel? rms uncertainty on Velkm/sstat.errorfloatnullableWidth? H_2_CO absorption line width (1)km/sspect.line.widthfloatnullablee_Width? rms uncertainty on Widthkm/sstat.error;spect.line.widthfloatnullableTL? H_2_CO absorption line antenna temperature (1)Kphot.antennaTempfloatnullableTC? H_2_CO absorption line continuum brightness temperatureKphys.temperaturefloatnullableJ/A+A/551/A28/tableb4*Parameters of the ^12^CO (1-0) and ^13^CO (1-0) emission linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource namemeta.id;meta.maincharOffXOffset in RAarcminpos.eq.ra;arith.diffintOffYOffset in DEarcminpos.eq.dec;arith.diffintFlux12? ^12^CO(1-0) fluxK.km/sphot.fluxfloatnullablee_Flux12? rms uncertainty on Flux12K.km/sstat.errorfloatnullableVel12? ^12^CO(1-0) velocity (1)km/sspect.dopplerVelocfloatnullableWidth12? ^12^CO(1-0) width (1)km/sspect.line.widthfloatnullableTL12? ^12^CO(1-0) antenna temperatureKphot.antennaTempfloatnullableFlux13? ^13^CO(1-0) fluxK.km/sphot.fluxfloatnullablee_Flux13? rms uncertainty on Flux13K.km/sstat.errorfloatnullableVel13? ^13^CO(1-0) velocity (1)km/sspect.dopplerVelocfloatnullableWidth13? ^13^CO(1-0) width (1)km/sspect.line.widthfloatnullableTL13? ^13^CO(1-0) antenna temperatureKphot.antennaTempfloatnullable