J/ApJ/966/93ivo://CDS.VizieR/J/ApJ/966/93doi:10.26093/cds/vizier.19660093CDSJones M.G.Sand D.J.Karunakaran A.Spekkens K.Oman K.A.Bennet P.,Besla G.Crnojevic D.Cuillandre J.-C.Fielder C.E.Gwyn S.,Mutlu-Pakdil B.2026-02-23T20:01:30Z2024-09-26T14:13:26ZCDS support team

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

cds-question@unistra.frgalaxiesstellar-massesultraviolet-astronomyvisible-astronomyh-alpha-photometryWe have imaged the entirety of eight (plus one partial) Milky Way (MW)-like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both H{alpha} and HI with the Canada-France-Hawaii Telescope and the Jansky Very Large Array. In these eight systems we have identified four cases where a satellite appears to be currently undergoing ram pressure stripping (RPS) as its HI gas collides with the circumgalactic medium (CGM) of its host. We also see a clear suppression of gas fraction (M_HI_/M*) with decreasing (projected) satellite-host separation-to our knowledge, the first time this has been observed in a sample of MW-like systems. Comparisons to the Auriga, A Project Of Simulating The Local Environment, and TNG50 cosmological zoom-in simulations show consistent global behavior, but they systematically underpredict gas fractions across all satellites by roughly 0.5 dex. Using a simplistic RPS model, we estimate the average peak CGM density that satellites in these systems have encountered to be log{rho}_cgm_~-27.3g/cm^3^. Furthermore, we see tentative evidence that these satellites are following a specific star formation rate to gas fraction relation that is distinct from field galaxies. Finally, we detect one new gas-rich satellite in the UGC 903 system with an optical size and surface brightness meeting the standard criteria to be considered an ultra- diffuse galaxy.2024ApJ...966...93Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/966/93CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/907/85 : SAGA Survey. II. Satellite systems around galaxies (Mao+, 2021)J/ApJ/916/L19 : Satellites around MW analogs from SAGA II (Karunakaran+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/966/93https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/966/93http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/966/93https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/966/93https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/966/93http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/966/93GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/966/93/table2 (Satellite HI and Star Formation Properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/966/93/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/966/93/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/966/93/table2?GETtext/xml+votable180.050000true20.28517.60220.0055555555555555566/7265 7267 18427 18669 18680 18895 18917 19792-19793 26247 26258 28076 32439 32480 32482 36286-36287 36338https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/966/93?format=asciiUVOpticaldefaultJ/ApJ/966/93/table2Satellite HI and Star Formation PropertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDesignation of satellitemeta.id;meta.maincharHostDesignation of hostmeta.id.parentcharRAJ2000Right Ascension (J2000) of satellitedegpos.eq.ra;meta.mainDEJ2000Declination (J2000) of satellitedegpos.eq.dec;meta.mainDprojProjected host-satellite separationkpcpos.distanceintDeltaczVelocity difference between host and satellitekm/sphys.veloc;arith.diffintlogMstarSatellite stellar mass (Mao et al., 2021ApJ...907...85M, Cat. J/ApJ/907/85)log(solMass)phys.massfloatl_logSFRNUV[<] Lower limit flag on satellite NUV star formation ratemeta.code.errorcharlogSFRNUVSatellite NUV star formation rate (Karunakaran et al., 2021ApJ...916L..19K, Cat. J/ApJ/916/L19)log(solMass.yr**-1)phys.SFR;instr.obstyfloate_logSFRNUV? Uncertainty of satellite NUV star formation ratelog(solMass.yr**-1)stat.errorfloatnullablel_logSFRHa[<] Lower limit flag on satellite H-alpha star formation ratemeta.code.errorcharlogSFRHa? Satellite H-alpha star formation ratelog(solMass.yr**-1)phys.SFR;instr.obsty;spect.linefloatnullablee_logSFRHa? Uncertainty of satellite H-alpha star formation ratelog(solMass.yr**-1)stat.errorfloatnullablel_logMHI[<] Lower limit flag on satellite HI massmeta.code.errorcharlogMHI? Satellite HI masslog(solMass)phys.mass;instr.obstyfloatnullablee_logMHI? Uncertainty of satellite HI masslog(solMass)stat.errorfloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullablel_logMHI/Mstar[<] Lower limit flag on satellite gas fractionmeta.code.errorcharlogMHI/Mstar? Satellite gas fractionphys.mass;arith.ratiofloatnullable