J/MNRAS/436/1465ivo://CDS.VizieR/J/MNRAS/436/1465doi:10.26093/cds/vizier.74361465CDSBuckner A.S.M.Froebrich D.2024-08-07T20:11:53Z2014-12-02T13:48:56ZCDS support team

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

cds-question@unistra.frstellar-associationsopen-star-clustersstellar-distanceextinctionDetermining star cluster distances is essential to analyse their properties and distribution in the Galaxy. In particular, it is desirable to have a reliable, purely photometric distance estimation method for large samples of newly discovered cluster candidates e.g. from the Two Micron All Sky Survey, the UK Infrared Deep Sky Survey Galactic Plane Survey and VVV. Here, we establish an automatic method to estimate distances and reddening from near-infrared photometry alone, without the use of isochrone fitting. We employ a decontamination procedure of JHK photometry to determine the density of stars foreground to clusters and a galactic model to estimate distances. We then calibrate the method using clusters with known properties. This allows us to establish distance estimates with better than 40 percent accuracy. We apply our method to determine the extinction and distance values to 378 known open clusters and 397 cluster candidates from the list of Froebrich, Scholz & Raftery (2007MNRAS.374..399F, Cat. J/MNRAS/374/399). We find that the sample is biased towards clusters of a distance of approximately 3kpc, with typical distances between 2 and 6kpc. Using the cluster distances and extinction values, we investigate how the average extinction per kiloparsec distance changes as a function of the Galactic longitude. We find a systematic dependence that can be approximated by A_H_(l)[mag/kpc]=0.10+0.001x|l-180{deg}|/{deg} for regions more than 60{deg} from the Galactic Centre.2013MNRAS.436.1465Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/436/1465CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/374/399 : Infrared star clusters with |b|<20{deg} (Froebrich+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/436/1465https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/436/1465http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/436/1465https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/436/1465https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/436/1465http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/436/1465GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/436/1465/tablea1 (Summary table of the FSR cluster properties determined with our method)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/436/1465/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/436/1465/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/436/1465/tablea1?GETtext/xml+votable180.050000true263.0925-27.0613890.0055555555555555565/3577 3655-3656 5552 6/1029 1101 1109 1117 1231 1243 1267 1285 1287 1289 1297 1299 1302 1308 1326 1335 1353 1380 1385 1409 1423 1433 1446 1452 1457 1461-1462 1476 1481-1482 1513-1514 1539 1582 1616 1662 1781-1783 1785 1801 1808 1811 1821 1829 1839 1845 1848 1930 1932 1959 2502 2744 2940 2967 2983 3034 3040 3047 3052 3057 3059 3061-3063 3067 3091 3143 3147 3149 3157-3158 3168 3186 3212 3227 3254 3261 3274 3277 3298 3301 3303-3305 3307 3312 3320 3335 3362 3384 3428 3493 3584 3611 3621-3623 3626 3628 3630-3634 3636 3638 3640 3642 3644-3645 3648-3649 3688 3690 3710 3712 3715 3718 3723-3724 3739 3743 3752 3755 3849 6149 6307 12538 12941 12943 12971 12990 13035-13036 13040 13048 13050 13188 13291 13309 13791 13824 13840 13989-13990 13996 14013-14014 14029 14043 14073 14202 14223 14237 14242 14246 14248 14251 14255-14256 14258 14263 14267-14268 14270 14280 14282 14288 14295 14300-14301 14306-14307 14314 14316-14317 14320-14321 14324 14328 14331 14340 14353 14400 14404 14410 14415 14418 14424 14427 14430 14451 14460 14575 14580 14603-14604 14606 14628-14629 14632-14633 14641 14643-14644 14646 14653 14655 14660 14667 14669 14679 14681-14682 14686 14688 14690-14693 14698 14700 14704-14705 14707 14719 14740 14749 14752 14800 14802 14817 15363 15368 15374 15379 15384 15386 15410-15412 15426 15430 15433-15434 15439-15440 15443 15447-15448 15452 15458 15478 15489 15497 15571 15622 15629 15632-15634 15657 15664-15665 15667 15670-15671 15683 15686-15687 15701 15709 15711 15716 15722 15759 15812 15827 20752 20821 20823 20833 20849 20958 20966 20989 21302 21325 21332 21337 21428 21458 21504 21510-21511 21513 21519 21525 21529 21538 21550 21557 21586 21602 21613 21633 21643-21644 21656-21658 21664 21668 21680 21686 21688 21694 21719 21736 21939 22021 22038 22040 22051 22065 22071-22072 22093 22117 22121-22122 22130 22135 22161 22163 22197 22214 22219 22243 22245 22249 22253 22433 22499 22805 22855 23381 23580 23583 23620 23626 23637 23645-23646 23679 23696 23717 23745 23760-23761 23763 23765 23768 23770 23795-23797 23840 23904 23938 23962 23972 23976-23977 23980-23982 23986 24032 24123 24138 24291 24322 24325-24326 24333 24339 24344 24359 24367 24376 24378 24426 24450 24466 24470 24472 24474 24476 24491 24496-24497 24499 24510 24527 24554 28708 28743 28859 28914 28919 29066 29096 29106 29113 29154 29160 29216 29260 29262 29274 29304 29439 29463 29469 29505 29509 29511 29532 29549 29594 29711 29870 29997 30208 30215 30218 30257 30269 30309 30323 30335-30336 30400 30407 30427 30506 30595 30622 30654 30691-30693 30704 31061 32089 37178 37196 37230 37233 37237 37297 37334 37341 37349 37360 37362 37364 37366 37368-37369 37371 37373 37375 37592 37709 37711 37713-37715 37717-37718 37721 37723-37724 37745 37750 37753 37827 37839 37841 37844 37846 37851-37852 37862-37863 37867 37872 37874 37883-37884 37895 37897 37899-37901 37906 37914 37920 37923-37924 37926 37929 37931-37932 37934 37938 37942 37962 37971 37991 38016-38018 38024 38026 38048 38441 38529 38537 38571 39175 39181 39189 39196 39233 39236 39238 39244 39246-39249 39274 39278-39280 39283-39284 39286 39324 39326 39359 39390 39403 39420 39676 39752 39754 39756 39760 39762-39763 39766 39768 39770 39776 39778-39779 39781 39789 39804 39807 39831 39879 39883 39906-39907 39909-39910 39919-39921 39929-39930 39944 39976-39977 40010 40064 40071 40101 40104 40177 40451 40610 40616 40620 40625 41252 41389 41466 41522 41527 41545 41565 41576 41613 41620 41624 41649 41652 41655 41675 41678-41679 41682 41688 41698-41699 41701 41707 41744 41756 41768-41769 41773 41779 41793 41801 41809 41813 41817 41856-41857 41869 42113 42153 42177 42210 42218 42274 42366-42367 42370 42405 42421 42425 42435 42498 42507 42511 42516 42528 42548 42579 42590 42779 42811 42820 42835 42898 43008 43013-43014 43016 43018 43022 43025 43033-43034 43052 43058 43140 43142 47822https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/436/1465?format=asciidefaultJ/MNRAS/436/1465/tablea1Summary table of the FSR cluster properties determined with our methodGLATGalactic latitudedegpos.galactic.latfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintpDetails from previous papers about this clustermeta.ref.urlintnullableFSR[1/1785] FSR ID number (Froebrich, Scholz and Raftery 2007, J/MNRAS/374/399; <[FSR2007] NNNN> in Simbad)meta.id;meta.mainintType[new/known ] known open cluster or new open cluster candidatemeta.codecharGLONGalactic longitudedegpos.galactic.lonRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainDist? Distancekpcpos.distance;pos.heliocentricfloatnullableAH4.5H-band extinction values calculated from H-[4.5] excessmagphys.absorptionfloatAH.KH-band extinction values calculated from H-K excessmagphys.absorptionfloatYSO[0/0.15] YSO fractionstat.fit.paramfloatNtotNumber of stars within two core radii of the cluster centre (N^tot^_2rcore_)meta.numberintNmemTotal number of members (calculated as the sum of the membership probabilities of all stars) in the same area (N^mem^_2rcore_)meta.numberintSimbadSimbad column added by the CDSmeta.ref.urlchar