J/ApJ/921/134ivo://CDS.VizieR/J/ApJ/921/134doi:10.26093/cds/vizier.19210134CDSSimha S.Tejos N.Prochaska J.X.Lee K.-G.Ryder S.D.Cantalupo S.,Bannister K.W.Bhandari S.Shannon R.M.2024-05-06T14:31:43Z2023-03-30T12:22:59ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-photometryvisible-astronomybroad-band-photometryspectroscopyredshiftedsurveysradio-sourcestransient-sourcesFast radio burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution of the matter distribution in the cosmic web. In this work, we aim to estimate the contribution to FRB 180924 DM from foreground galactic halos. Localized by ASKAP to a massive galaxy, this sightline is notable for an estimated cosmic web contribution to the DM (DM_cosmic_=220pc/cm^3^), which is less than the average value at the host redshift (z=0.3216) estimated from the Macquart relation (280pc/cm^3^). In the favored models of the cosmic web, this suggests few intersections with foreground halos at small impact parameters (<=100kpc). To test this hypothesis, we carried out spectroscopic observations of the field galaxies within ~1' of the sightline with VLT/MUSE and Keck/LRIS. Furthermore, we developed a probabilistic methodology that leverages photometric redshifts derived from wide-field DES and WISE imaging. We conclude that there is no galactic halo that closely intersects the sightline and also that the net DM contribution from halos DM_halos_<45pc/cm^3^ (95% c.l.). This value is lower than the DMhalos estimated from an "average" sightline (121pc/cm^3^) using the Planck {Lambda}CDM model and the Aemulus halo mass function and reasonably explains its low DMcosmic value. We conclude that FRB 180924 represents the predicted majority of sightlines in the universe with no proximate foreground galactic halos. Our framework lays the foundation for a comprehensive analysis of FRB fields in the near future.2021ApJ...921..134Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/921/134CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/328 : AllWISE Data Release (Cutri+ 2013)II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)II/371 : The Dark Energy Survey (DES): Data Release 2 (Abbott+, 2021)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/ApJ/740/91 : Ly{alpha} and OVI in galaxies around quasars (Prochaska+, 2011)J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)J/other/PASA/33.45 : FRBCAT: The Fast Radio Burst (FRB) Cat. (Petroff+, 2016)J/ApJ/901/134 : Foreground galaxies toward FRB 190608 from SDSS (Simha+, 2020)J/ApJS/257/59 : First CHIME/FRB Fast Radio Burst Cat. (CHIME/FRB Col.+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/921/134https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/921/134http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/921/134https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/921/134https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/921/134http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/921/134GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/921/134/table1 (Catalog of photometry from DES and WISE for galaxies in the FRB 180924 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/921/134/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/921/134/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/921/134/table1?GETtext/xml+votable180.050000true326.10521-40.900230.005555555555555556Cone search capability for table J/ApJ/921/134/table2 (MUSE and LRIS sources with unambiguous redshifts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/921/134/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/921/134/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/921/134/table2?GETtext/xml+votable180.050000true326.10947-40.894250.0055555555555555566/467848.157980699529898e-21 4.973527819473193e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/921/134?format=asciiOpticalInfraredRadiodefaultJ/ApJ/921/134/table1Catalog of photometry from DES and WISE for galaxies in the FRB 180924 fieldz[0.034/5.9] Photometric redshiftsrc.redshift.photfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoadIDDES DR1 main COADD_OBJECT_ID value (<DES JHHMMSS.ss+DDMMSS.s> in Simbad)meta.id;meta.mainlongprimaryRAJ2000[325.77/326.44] Right Ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-41.15/-40.65] Declination (J2000)degpos.eq.dec;meta.mainindexedgmag[13.95/]? DES apparent g band AB magnitudemagphot.mag;em.opt.Bfloatnullablermag[17/]? DES apparent r band AB magnitudemagphot.mag;em.opt.Rfloatnullableimag[15.78/28.8] DES apparent i band AB magnitudemagphot.mag;em.opt.Ifloatzmag[14.29/29] DES apparent z band AB magnitudemagphot.mag;em.opt.IfloatYmag[13.3/]? DES apparent Y band magnitudemagphot.mag;em.IR.JfloatnullableW1mag[11.39/17.74]? WISE W1 (3.36um) band Vega magnitudemagphot.mag;em.IR.3-4umfloatnullableW2mag[11.45/17.34]? WISE W2 (4.62um) band Vega magnitudemagphot.mag;em.IR.4-8umfloatnullableW3mag[9.9/12.55]? WISE W3 (12.1um) band Vega magnitudemagphot.flux.density;em.IR.8-15umfloatnullableW4mag[7/9.1]? WISE W4 (22.2um) band Vega magnitudemagphot.flux.density;em.IR.15-30umfloatnullablezspDisplay the MUSE/LRIS redshift obtained for this source (link to Table 2)meta.ref.urlintnullableWISEADisplay the AllWISE data (II/328) within 3" if W1mag is filledmeta.ref.urlcharJ/ApJ/921/134/table2MUSE and LRIS sources with unambiguous redshiftsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharf_zspNote on zsp (1)meta.codecharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainzsp[0.072/2.96] Unambiguous spectroscopic redshiftsrc.redshiftdoubleCoadID[209914131/209916475]? DES DR1 CoadID (2)meta.id;meta.mainlongnullablermag[18.69/24.54]? r-band AB magnitudemagphot.mag;em.opt.RfloatnullableSep[0.01/1.98] Angular separation from the FRBarcminpos.angDistancefloatDist[3/252] Angular separation converted to projected distance from the FRB sightlinekpcpos.distanceintPhotDisplay the DES/WISE photometry for this source (link to Table 1)meta.ref.urlchar