J/ApJ/639/227ivo://CDS.VizieR/J/ApJ/639/227doi:10.26093/cds/vizier.16390227CDSSimon R.Jackson J.M.Rathborne J.M.Chambers E.T.2012-11-13T06:14:02Z2010-03-28T16:17:04ZCDS support team

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

cds-question@unistra.frmolecular-cloudsinterstellar-mediuminfrared-sourcesWe use 8.3{mu}m mid-infrared images acquired with the Midcourse Space Experiment satellite to identify and catalog infrared dark clouds (IRDCs) in the first and fourth quadrants of the Galactic plane. Because IRDCs are seen as dark extinction features against the diffuse Galactic infrared background, we identify them by first determining a model background from the 8.3{mu}m images and then searching for regions of high decremental contrast with respect to this background. IRDC candidates in our catalog are defined by contiguous regions bounded by closed contours of a 2{sigma} decremental contrast threshold. We identify 10,931 candidate IRDCs. For each IRDC, we also catalog cores. These cores, defined as localized regions with at least 40% higher extinction than the cloud's average extinction, are found by iteratively fitting two-dimensional elliptical Gaussian functions to the contrast peaks. We identify 12,774 cores. The catalog contains the position, angular size, orientation, area, peak contrast, peak contrast signal-to-noise, and integrated contrast of the candidate IRDCs and their cores.2006ApJ...639..227Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/639/227CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)J/AJ/126/1423 : MSX 8.3um fluxes of star-forming regions (Kraemer+, 2003)J/ApJ/641/389 : Properties of IRDC cores (Rathborne+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/639/227https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/639/227http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/639/227https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/639/227https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/639/227http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/639/227GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/639/227/catalog (MSX IR dark cloud candidate catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/639/227/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/639/227/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/639/227/catalog?GETtext/xml+votable180.050000true265.82122-28.510470.0055555555555555565/3667 3670 3672 3673 3674 7202 7203 7204 7206 7207 7218 7219 7222 7225 7228 7229 7272 7273 7275 7278 7279 7365 7376 7377 7378 7382 7383 7554 7561 7564 7565 7578 7579 7605 9480 9482 9504 10415 10419 10420 10451 10452 10453 10542 10543 10553 10556 10594 10595 10597 10598 10599 10609 10611 10612 10614 10615 10624 6/12970 14617 14621 14644 14645 14647 14652 14653 14655 14658 14659 14661 14662 14665 14666 14667 14675 14700 14701 14704 14705 14706 14712 14741 14784 15362 15370 28802 28803 28805 28806 28807 28822 28832 28833 28837 28848 28849 28852 28853 28892 28894 28896 28897 28899 28921 28924 28925 29096 29097 29099 29106 29107 29110 29154 29162 29163 29166 29167 29444 29445 29456 29457 29459 29465 29468 29469 29471 29516 29517 29518 29520 29522 29523 29526 29527 29556 29557 30210 30221 30222 30223 30234 30235 30240 30241 30243 30264 30265 30268 30269 30271 30306 30328 30330 30341 30404 30405 30416 30417 30419 30429 30592 30594 30595 30601 30604 30605 30607 30616 30618 30619 30622 30644 30645 30689 30691 30692 30694 30695 30712 30713 30716 30717 30718 37245 37333 37335 37340 37342 37343 37363 37364 37365 37366 37897 37899 37900 37901 37902 37924 38024 38025 38026 41595 41598 41599 41651 41653 41654 41655 41657 41669 41670 41671 41673 41674 41675 41684 41685 41686 41688 41689 41696 41697 41698 41755 41756 41758 41759 41765 41766 41767 41768 41769 41770 41772 41773 41776 41777 41778 41780 41781 41799 41801 41802 41803 41816 41817 41820 41824 42151 42155 42157 42158 42159 42162 42163 42166 42167 42191 42202 42203 42205 42206 42207 42210 42211 42216 42217 42218 42220 42221 42228 42229 42230 42232 42386 42387 42400 42401 42404 42405 42417 42420 42433 42434 42435 42440 42441 42443 42452 42454 42455 42468 42484 42500 42501 42502 42512 42513 42516 43015 43018 43019 43024 43026https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/639/227?format=asciiInfrareddefaultJ/ApJ/639/227/catalogMSX IR dark cloud candidate catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXDCCloud name (MSXDC GLLL.ll+BB.bb)meta.id;meta.maincharm_MSXDCIndicates a cloud (0) or core (a,b,c,...)meta.code.multipcharGLON[-0.005,360[ Galactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latMajAxisMajor axis of the cloud (1)arcminphys.angSizefloatMinAxisMinor axis of the cloud (2)arcminphys.angSizefloatPAPosition angle of ellipse (3)degpos.posAngintAreaTotal area of the cloud (4)arcmin**2phys.angSizefloatPCPeak Contrastphot.flux;arith.ratiofloatc/Dc? Ratio of the core's peak contrast to its uncertainty (c/{Delta}c)stat.snrfloatnullableIntIntegrated contrast (5)arcmin**2phot.flux;arith.ratiofloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed