J/A+A/678/A181ivo://CDS.VizieR/J/A+A/678/A181doi:10.26093/cds/vizier.36780181CDSBourdin H.De Luca F.Mazzotta P.Bartalucci I.Donahue M.Eckert D.,Ettori S.Gastaldello F.Ghizzardi S.Kay S.Lovisari L.Maughan B.,Oppizzi F.Pointecouteau E.Pratt G.W.Rossetti M.Sereno M.2024-11-28T20:05:29Z2024-03-04T15:38:37ZCDS support team

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

cds-question@unistra.frgalaxy-clustersinterstellar-mediumh-i-line-emissionThe X-ray spectrum of extragalactic sources, such as galaxy clusters, is affected by the photo-absorption of various components of the Galactic interstellar medium (ISM). The resulting spectral distortion contributes to the systematics of cluster temperature measurements. It essentially depends on the neutral (atomic+molecular) Galactic hydrogen density column, N_H_, which remains challenging to map across the sky in the lack of a straightforward tracer of the molecular gas phase in the ISM. Combining data from the HI4PI and Planck HFI sky surveys, we investigate the mass fraction of molecular gas across the line of sight of CHEX-MATE galaxy clusters by searching for thermal dust emission excess with respects to the neutral atomic hydrogen density column, N_HI_. Consistent with earlier studies of the ISM based on IRAS and Planck data, we detect dust emission excess along the line of sight of some members of the CHEX-MATE cluster catalogue that are mostly localised behind dense ISM regions. We find that the CHEX-MATE cluster catalogue can be divided into three categories: 40% of members are located behind low N_HI_ regions where the molecular mass fraction is negligible, 40% of members are located behind intermediate N_HI_ regions where the molecular gas fraction would reach 5% on average, and the remaining 20% of members are located behind high N_HI_ regions that locally exhibit even higher molecular gas fractions. The apparent cluster temperature shifts associated with the molecular content of the ISM are about 1% or less for most CHEX-MATE clusters, but can exceed 5% in the highest N_HI_ regions.2023A&A...678A.181Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/678/A181CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/594/A27 : Planck Sunyaev-Zeldovich sources (PSZ2) (Planck+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/678/A181https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/678/A181http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/678/A181https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/678/A181https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/678/A181http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/678/A181GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/678/A181/tablea1 (Mass fraction of molecular hydrogen (f) and total hydrogen density column (NH) estimates toward CHEX-MATE clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/678/A181/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/678/A181/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/678/A181/tablea1?GETtext/xml+votable180.050000true203.5291620.250.0055555555555555566/708 4206 4394 4406 5099 5344 5438 5536 5597 6337 8220 8507 8875 8963 9036 9050 9072 9168 9354 9366 9476 9506 9508 9593 9664 9776 9997 10271 10311-10312 10318 10416 10526-10527 10664 10823 11041 11080 11279 11442-11443 12504 12642 12653 13314 14879 15112 15129 15286 16032 16486 16702 17457 17518 17741 18475 18534 18800 19009 19451 19848 19935 20247 20302 20335 20520 20536 20735 21934 22373 22467 22491 22607 22661 22915 22972 24735 25188 25451 25675 26037 26189 27742 27765 27966 28174 28271 28372 28429-28430 28448 28512 31537 32362 32379 32500 32503 32693 32766 35310 41081 43358 44802 44817 46424 46474 46571 47919https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/678/A181?format=asciiRadiodefaultJ/A+A/678/A181/tablea1Mass fraction of molecular hydrogen (f) and total hydrogen density column (NH) estimates toward CHEX-MATE clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNHI(HI4PI)HI4PI total HI column density1e+20cm**-2phys.columnDensityfloatfPlanck+HI4PI f=2N_H2_/N_H_ ratio (1)phys.density;arith.ratiofloate_fPlanck+HI4PI f=2N_H2_/N_H_ ratio errorstat.errorfloatNH(Pl+HI4PI)Planck+HI4PI total H column density (1)1e+20cm**-2phys.columnDensityfloate_NH(Pl+HI4PI)Planck+HI4PI total H column density error1e+20cm**-2stat.errorfloatNH(XMM)? XMM total H column density (1)1e+20cm**-2phys.columnDensityfloatnullableE_NH(XMM)? XMM total H column density error1e+20cm**-2stat.error;stat.maxfloatnullablee_NH(XMM)? XMM total H column density error (lower value)1e+20cm**-2stat.errorfloatnullableIDPlanck ID (PSZ2GLLL.ll+BB.BBAA)meta.id;meta.mainchar