Spiral arms Gaia EDR3 J/A+A/651/A104 ivo://CDS.VizieR/J/A+A/651/A104 doi:10.26093/cds/vizier.36510104 CDS Poggio E. Drimmel R. Cantat-Gaudin T. Ramos P. Ripepi V. Zari E.,Andrae R. Blomme R. Chemin L. Clementini G. Figueras F. Fouesneau M.,Fremat Y. Lobel A. Marshall D.J. Muraveva T. Romero-Gomez M. 2023-02-04T18:08:02Z 2021-07-28T07:12:43Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr milky-way-galaxy open-star-clusters proper-motions visible-astronomy trigonometric-parallax Using the astrometry and integrated photometry from the Gaia Early Data Release 3 (EDR3), we map the density variations in the distribution of young Upper Main Sequence (UMS) stars, open clusters and classical Cepheids in the Galactic disk within several kiloparsecs of the Sun. Maps of relative over/under-dense regions for UMS stars in the Galactic disk are derived, using both bivariate kernel density estimators and wavelet transformations. The resulting overdensity maps exhibit large-scale arches, that extend in a clumpy but coherent way over the entire sampled volume, indicating the location of the spiral arms segments in the vicinity of the Sun. Peaks in the UMS overdensity are well-matched by the distribution of young and intrinsically bright open clusters. By applying a wavelet transformation to a sample of classical Cepheids, we find that their overdensities possibly extend the spiral arm segments on a larger scale (~10kpc from the Sun). While the resulting map based on the UMS sample is generally consistent with previous models of the Sagittarius-Carina spiral arm, the geometry of the arms in the III quadrant (galactic longitudes 180{deg}<l<270{deg}) differs significantly from many previous models. In particular we find that our maps favour a larger pitch angle for the Perseus arm, and that the Local Arm extends into the III quadrant at least 4kpc past the Sun's position, giving it a total length of at least 8kpc. 2021A&A...651A.104P https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/651/A104 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/350 : Gaia EDR3 (Gaia Collaboration, 2020) J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/651/A104 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/651/A104 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/651/A104 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/651/A104 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/651/A104 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/651/A104 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/651/A104/ocs_edr3 (Catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/651/A104/ocs_edr3? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/651/A104/ocs_edr3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/651/A104/ocs_edr3? 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40610-40612 40616 40618-40620 40623 40625 40631 40633 40696 40878 41141 41314 41381 41436 41445 41455 41461 41466-41467 41553 41557-41559 41577-41578 41582 41591 41594-41595 41599 41613 41615 41620-41622 41629 41633 41638 41643 41646 41648-41649 41652-41654 41670 41672-41673 41675-41676 41678 41682 41688 41690-41692 41697-41699 41701 41703-41704 41710-41711 41740-41741 41747 41753-41754 41762 41765 41768 41770-41771 41773-41776 41788-41789 41799 41808-41809 41812 41814 41816 41829 41831 41834 41846 41856 41858 41863 41873-41874 41878 41893 41922 41928 41944 41995 42026 42029 42046 42127 42135 42150-42151 42153-42157 42159 42162-42166 42172 42174 42177 42192 42197 42201-42203 42206-42207 42213-42214 42216-42218 42224-42225 42227 42230 42268 42274 42303 42336 42346 42351 42353 42363-42365 42367 42374 42380 42383-42384 42387 42390 42392 42394 42396 42399-42400 42402 42415-42417 42420 42432-42433 42435 42437 42450 42452 42456 42458 42464 42469-42470 42472 42486 42496 42500-42501 42503 42513 42516 42522 42548 42583 42836 42846 42850 42964 43012 43021-43022 43024 43026-43027 43036 43040-43041 43044 43046-43048 43050 43052 43059 43062 43136-43137 43140 43191 43218 43301 43450 47621 47784 47854 49099 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/651/A104?format=ascii Optical default J/A+A/651/A104/ocs_edr3 Catalog nb Number of members meta.number int Cluster Cluster name meta.id;meta.main char RA_ICRS [] Mean right ascension of members (ICRS) at Ep=2015.5 deg pos.eq.ra;meta.main e_pmRA* ? Sigma=1.4826*MAD where MAD is the median absolute deviation of pmRA* mas/yr stat.error;pos.pm;pos.eq.ra float nullable pmDE ? Median proper motion along DE of members mas/yr pos.pm;pos.eq.dec double nullable SimbadName Simbad column added by the CDS meta.id char nullable _DE.icrs Declination (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.dec nullable indexed _RA.icrs Right ascension (ICRS) at Epoch=J2000, proper motions taken into account deg pos.eq.ra nullable indexed recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int DE_ICRS Mean declination of members (ICRS) at Ep=2015.5 deg pos.eq.dec;meta.main GLON Mean Galactic longitude of members deg pos.galactic.lon GLAT Mean Galactic latitude of members deg pos.galactic.lat float r50 Radius containing half the members deg stat.fit.param float agenn ? Age (logt) of the cluster (from Cantat-gaudin et al., 2020A&A...640A...1C) log(yr) time.age float nullable dmnn ? Distance modulus of the cluster (from Cantat-gaudin et al., 2020A&A...640A...1C) mag phot.mag.distMod float nullable distpc ? Distance in parsecs (converted distance modulus) pc pos.distance float nullable pmRA* ? Median proper motion along RA of members, pmRA*cosDE mas/yr pos.pm;pos.eq.ra double nullable e_pmDE ? Sigma=1.4826*MAD where MAD is the median absolute deviation of pmRDE mas/yr stat.error;pos.pm;pos.eq.dec float nullable plx ? Median parallax of members mas pos.parallax.trig float nullable e_plx ? Sigma=1.4826*MAD where MAD is the median absolute deviation of plc mas stat.error;pos.parallax float nullable nbB0 Number of members brighter than absolute magnitude 0 in the G band meta.number int nbB2 Number of members brighter than absolute magnitude 2 in the G band meta.number int nbB4 Number of members brighter than absolute magnitude 4 in the G band meta.number int