ATOMS IV Gas clumps properties and SFRs

We report the detection of radio recombination line (RRL) H_40{alpha} towards 75 sources, with data obtained from ACA (Atacama Compact 7 m Array) observations in the ATOMS (ALMA Three-millimeter Observations of Massive Star-forming regions) survey of 146 active Galactic star-forming regions. We calculated ionized gas mass and star formation rate (SFR) with H_40{alpha} line emission. The mass of ionized gas is significantly smaller than molecular gas mass, indicating that ionized gas is negligible in the star-forming clumps of the ATOMS sample. The SFR estimated with RRL H_40{alpha} agrees well with that calculated with the total bolometric luminosity (L_bol) when SFR => 5 M_{sun}.Myr^-1^, suggesting that millimetre RRLs could well sample the upper part of the initial mass function and thus be good tracers of SFR. We also study the relationships between L_bol and the molecular line luminosities (L'mol) of CS J = 2-1 and HC3N J = 11-10 for all the 146 ATOMS sources. The L_bol_ - L'mol correlations of both the CS J = 2-1 and HC3N J = 11-10 lines appear approximately linear and these transitions have success in predicting L_bol_ similar to that of more commonly used transitions. The L_bol_ -to- L'mol ratios or SFR-to-mass ratios (star formation efficiency) do not change with galactocentric distances (R_GC_). Sources with H_40{alpha} emission (or H II regions) show higher L_bol -to- L'mol ratios than those without H_40{alpha}_ emission, which may be an evolutionary effect.

Cone search capability for table J/MNRAS/510/4998/table2 (Gas clumps identified in CS J = 2-1)

Cone search capability for table J/MNRAS/510/4998/table3 (Gas clumps identified in HC3N J = 11-10)

Cone search capability for table J/MNRAS/510/4998/table4 (Gas clumps identified in H40{alpha})

Cone search capability for table J/MNRAS/510/4998/table5 (Luminosities of ATOMS sources)

Cone search capability for table J/MNRAS/510/4998/table7 (SFRs and gas masses of ATOMS sources)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/510/4998
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/510/4998
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/510/4998
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/510/4998
Provenance
Creator Zhang C.; Evans N.J.; Liu T.; Wu J.-W.; Wang K.; Liu H.-L.; Zhu F.-Y.,Ren Z.-Y.; Dewangan L.K.; Lee C.W.; Li S.; Bronfman L.; Tej A.; Li D.
Publisher CDS
Publication Year 2025
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Interstellar medium; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy