J/ApJ/708/1628ivo://CDS.VizieR/J/ApJ/708/1628doi:10.26093/cds/vizier.17081628CDSMcCall B.J.Drosback M.M.Thorburn J.A.York D.G.Friedman S.D.,Hobbs L.M.Rachford B.L.Snow T.P.Sonnentrucker P.Welty D.E.2018-01-30T07:18:24Z2012-03-26T14:48:54ZCDS support team

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

cds-question@unistra.frinterstellar-mediumline-intensitiesspectroscopyearly-type-starsIn a sample of 114 diffuse cloud sightlines spanning a wide range of interstellar environments, we find the equivalent widths of the diffuse interstellar bands (DIBs) {lambda}6196.0 and {lambda}6613.6 to be extremely well correlated, with a correlation coefficient of 0.986. A maximum likelihood functional relationship analysis shows that the observations are consistent with a perfect correlation if the observational errors, which are dominated by continuum placement and other systematics such as interfering lines, have been underestimated by a factor of 2. The quality of this correlation far exceeds other previously studied correlations, such as that between the {lambda}5780.5 DIB and either the color excess or the atomic hydrogen column density. The unusually tight correlation between these two DIBs would seem to suggest that they might represent the first pair of DIBs known to be due to the same molecular carrier. However, further theoretical work will be required to determine whether the different linewidths and band shapes of these two DIBs can be consistent with a common carrier. If the two DIBs do not in fact share the same molecular carrier, their two carriers must be chemically very closely related.2010ApJ...708.1628Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/708/1628CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/135 : Suppl. to Diffuse Interstellar Band Measurements (Guarinos 1988)II/149 : Diffuse Interstellar Band Measurements (Snow+ 1977)J/ApJ/705/32 : Diffuse interstellar bands from HD 183143 (Hobbs+, 2009)J/MNRAS/358/563 : Diffuse Interstellar Bands in 49 stars (Megier+, 2005)J/A+A/414/949 : Interstellar bands and H2, CH, CO column densitiesJ/ApJS/93/211 : IUE survey of H I Ly{alpha} absorption. I. (Diplas+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/708/1628https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/708/1628http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/708/1628https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/708/1628https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/708/1628http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/708/1628GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/708/1628/table1 (Physical properties and equivalent width measurements for program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/708/1628/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/708/1628/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/708/1628/table1?GETtext/xml+votable180.050000true8.249963362.93178250.0055555555555555566/375 418 463 859 1055 1060 1196 1198 1293 1539 1550 1558 1633 3060 3136 3183 3198 3430 13255 13331 13557 13953 13963 14015 14114 14167 14220 14302 14305 14643 14644 14691 14692 14777 15369 15392 15478 15479 15486 15624 15631 15662 15672 15687 15745 15747 18928 19009 19336 20107 20847 21401 21438 21439 21635 21646 21647 22123 22240 22249 22253 22258 22854 22855 22859 22862 22994 23298 23675 23717 23979 24338 24340 24370 24463 24504 27498 28890 28900 29089 29138 29162 29463 29513 29522 29537 29600 29619 29876 30356 30709 30718 30722 30818 31705 31756 39907 39916 42408 42977 42981 42994 44360 44366 44378 44389https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/708/1628?format=asciiOpticaldefaultJ/ApJ/708/1628/table1Physical properties and equivalent width measurements for program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharSpTypeMK spectral typesrc.spTypecharE(B-V)(B-V) color excess (1)magphot.color.excessfloatl_logNHLimit flag on NHmeta.code.errorcharlogNH? Log of Hydrogen column densitylog(cm**-2)phys.columnDensityfloatnullablee_logNH? NH uncertaintylog(cm**-2)stat.errorfloatnullabler_logNH? Reference for N(H) (2)meta.ref;pos.frameintnullablelogNH2? Log of H_2_ column densitylog(cm**-2)phys.columnDensityfloatnullablee_logNH2? NH2 uncertaintylog(cm**-2)stat.error;phys.columnDensityfloatnullabler_logNH2? Reference for N(H_2_) (2)meta.ref;pos.frameintnullableW61966196.0 equivalent width (in m{AA})1e-13mspect.line.eqWidthfloate_W6196W6196 uncertainty1e-13mstat.errorfloatW66136613.6 equivalent width (in m{AA})1e-13mspect.line.eqWidthfloate_W6613W6613 uncertainty1e-13mstat.errorfloatDIBLink to cross-match within 1.5" if any with other diffuse interstellar bands catalogsmeta.ref.urlintnullable_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main