J/A+A/657/A25ivo://CDS.VizieR/J/A+A/657/A25doi:10.26093/cds/vizier.36570025CDSNagy D.Dessauges-Zavadsky M.Richard J.Schaerer D.Combes F.,Messa M.Chisholm J.2023-12-21T15:29:56Z2021-12-25T17:42:18ZCDS support team

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

cds-question@unistra.frgravitational-lensinghst-photometryradio-sourcesWe study the spatially resolved physical properties of the Cosmic Snake arc in MACS J1206.2-0847 and the arc in Abell 0521 (A521). These are two strongly lensed galaxies at redshifts z=1.036 and z=1.044. We used observations of the Hubble Space Telescope (HST) and the Atacama Large Millimeter/submillimeter Array (ALMA). The former gives access to the star formation rate (SFR) and stellar mass (M*), and the latter to the H_2_ molecular gas mass (Mmol). HST and ALMA observations have similar angular resolutions of 0.15"-0.2", which with the help of strong gravitational lensing enable us to reach spatial resolutions down to ~30pc and ~100pc in these two galaxies, respectively. These resolutions are close to the resolution of observations of nearby galaxies. We study the radial profiles of SFR, M*, and Mmol surface densities of these high-redshift galaxies and compare the corresponding exponential scale lengths with those of local galaxies. We find that the scale lengths in the Cosmic Snake are about 0.5kpc-1.5kpc, and they are 3 to 10 times larger in A521. This is a significant difference knowing that the two galaxies have comparable integrated properties. These high-redshift scale lengths are nevertheless comparable to those of local galaxies, which cover a wide distribution. The particularity of our high-redshift radial profiles is the normalisation of the Mmol surface density profiles (Sigma Mmol), which are offset by up to a factor of 20 with respect to the profiles of z=0 counterparts. The SFR surface density profiles are also offset by the same factor as {SIGMA}Mmol, as expected from the Kennicutt-Schmidt law.2022A&A...657A..25Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/657/A25CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/657/A25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/657/A25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/657/A25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/657/A25https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/657/A25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/657/A25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/657/A25/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/657/A25/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/657/A25/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/657/A25/list?GETtext/xml+votable180.050000true73.52804-10.222680.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/657/A256/22607 22622 25451https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/657/A25?format=asciiRadiodefaultJ/A+A/657/A25/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscale? Scale of the imagearcsec/pixinstr.scalefloatnullableNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableFreq? Observed frequencyGHzem.freqfloatnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar