J/ApJ/913/53ivo://CDS.VizieR/J/ApJ/913/53doi:10.26093/cds/vizier.19130053CDSPutman M.E.Zheng Y.Price-Whelan A.M.Grcevich J.Johnson A.C.,Tollerud E.Peek J.E.G.2023-01-17T13:22:28Z2022-12-14T10:39:18ZCDS support team

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

cds-question@unistra.frgalaxiesh-i-line-emissionintergalactic-mediumThe gas content of the complete compilation of Local Group dwarf galaxies (119 within 2Mpc) is presented using HI survey data. Within the virial radius of the Milky Way (224kpc here), 53 of 55 dwarf galaxies are devoid of gas to limits of M_HI_<10^4^M_{sun}_. Within the virial radius of M31 (266kpc), 27 of 30 dwarf galaxies are devoid of gas (with limits typically <10^5^M_{sun}_). Beyond the virial radii of the Milky Way and M31, the majority of the dwarf galaxies have detected HI gas and HI masses higher than the limits. When the relationship between gas content and distance is investigated using a Local Group virial radius, more of the nondetected dwarf galaxies are within this radius (85+/-1 of the 93 nondetected dwarf galaxies) than within the virial radii of the Milky Way and M31. Using the Gaia proper-motion measurements available for 38 dwarf galaxies, the minimum gas density required to completely strip them of gas is calculated. Halo densities between 10^-5^ and 5x10^-4^cm^-3^ are typically required for instantaneous stripping at perigalacticon. When compared to halo density with radius expectations from simulations and observations, 80% of the dwarf galaxies with proper motions are consistent with being stripped by ram pressure at Milky Way pericenter. The results suggest that a diffuse gaseous galactic halo medium is important in quenching dwarf galaxies, and that a Local Group medium also potentially plays a role.2021ApJ...913...53Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/913/53CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/131/332 : Velocities of individual stars in NGC 205 (Geha+, 2006)J/AJ/133/715 : Dwarf galaxies of the Local Group (Whiting+, 2007)J/ApJ/675/201 : Radial velocities of stars near Leo I (Mateo+, 2008)J/ApJ/758/11 : Bayesian distances to M31 satellites (Conn+, 2012)J/AJ/144/134 : LITTLE THINGS survey of nearby dwarf gal. (Hunter+, 2012)J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)J/MNRAS/445/2061 : Absorption in multiphase CGM (Liang+, 2014)J/ApJ/809/146 : SDSS-DR8 isolated low-mass galaxies (Bradford+, 2015)J/ApJ/812/158 : Leo P RR Lyrae candidates & cumulative SFH (McQuinn+, 2015)J/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)J/MNRAS/458/L59 : Draco II stars gi magnitude & RVs (Martin+, 2016)J/ApJ/827/89 : HST imaging of Pisces A and B (Tollerud+, 2016)J/A+A/585/A41 : EBHIS spectra and HI column density maps (Winkel+, 2016)J/MNRAS/466/2006 : Phoenix dwarf galaxy RV and [Fe/H] catalog (Kacharov+, 2017)J/A+A/607/A48 : AGN data and absorption-line measurements (Richter+, 2017)J/A+A/612/A26 : Deep HI observations of Leo T with WSRT (Adams+, 2018)J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)J/MNRAS/479/5343 : Nearby dwarf galaxy in Magellanic bridge (Koposov+, 2018)J/MNRAS/478/1611 : Local Volume H I Survey (LVHIS) (Koribalski+, 2018)J/ApJS/234/2 : The GALFA-HI survey data release 2 (Peek+, 2018)J/ApJ/863/89 : Gaia DR2 PMs of stars in MW satellites (Simon, 2018)J/ApJ/879/22 : GALFA-HI search for local dwarf galaxies (Defelippis+, 2019)J/ApJ/887/115 : Sp. of stars in Price-Whelan 1 association (Nidever+, 2019)J/ApJ/875/77 : PMs of MW satellites with Gaia & DES (Pace+, 2019)J/ApJS/240/15 : HST/COS UV obs. of low-z SDSS galaxy groups (Stocke+, 2019)J/MNRAS/491/3496 : Andromeda XIX member stars (Collins+, 2020)J/ApJ/900/9 : AMIGA: Circumgalactic Medium of Andromeda (Lehner+, 2020)J/ApJ/892/137 : Spectroscopy of Grus II, Tuc IV and Tuc V (Simon+, 2020)J/A+A/635/A152 : Tucana dSph galaxy spectroscopic dataset (Taibi+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/913/53https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/913/53http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/913/53https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/913/53https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/913/53http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/913/53GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/913/53/dgal (Dwarf galaxies within 2Mpc: positions and HI parameters (Table 1) and other parameters (Table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/913/53/dgal?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/913/53/dgal?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/913/53/dgal?GETtext/xml+votable180.050000true238.264.565280.0055555555555555566/619 1023 2110 2216 2234 2272 2297 2352 2565 2572-2573 2604 2611 2622 2628 2668 2676 2709 2746 2755 2758 2767 2774 2777 2781 2789 2830 2852 2953 3042 4410 4419 4433 5287 5939 6021 7265 7416 8745 10153 10183 10308 10444 10769 11655 11691 13505 13655 13720 14149 16459 16735 17165 17229 17708 17872 18041 18538 18926 19239 19833 19990 20262 20416 20437 20440 20664 22039 24652 25180 25599 26487 26858 26983 27000 27207 27351 27580 28136 28361 29699 29718 31692 32916 33096 33257 33295 33626 33685 33720 33745 33995 34366 34858 35206 35720 35969 37615 38625 38841 38846 38939 39100 40205 45423 46021 46089 46144 46169 46212 46290 46597 46621 47425 48035 48771 48942https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/913/53?format=asciiRadiodefaultJ/ApJ/913/53/dgalDwarf galaxies within 2Mpc: positions and HI parameters (Table 1) and other parameters (Table 2)SimbadNameSimbad column added by the CDSmeta.idcharnullableDLGh[-9/56] DLG adjustment, MW mass higher (8)kpcpos.distanceintDLGl[-58/-3] DLG adjustment, MW mass lower (8)kpcpos.distanceintr_LvReference for Lv (9)meta.ref;pos.framecharr_rhReference for rh (9)meta.ref;pos.framecharr_sigmaReference for sigma (9)meta.ref;pos.framecharNEDNED column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOrbmedian orbital parameters and halo densities (link to Table 3)meta.ref.urlcharNameDwarf galaxy namemeta.id;meta.maincharprimaryf_Name? Notes or flags on Name (1)meta.codeintnullableRAJ2000Hour of Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (2)pos.eq.dec;meta.mainVel[-558/477]? Velocitykm/sphys.velocintnullableDist[22/1950] Distancekpcpos.distanceinte_Dist[0.4/205] Lower (or symmetric) uncertainty in Distkpcstat.errorfloatE_Dist[5/152]? Upper uncertainty in Distkpcstat.error;stat.maxintnullableDataData (3)meta.id;meta.datasetcharMethodMethod (4)meta.notecharsigHI[0.9/360]? 1{sigma} HI flux (5)mKphot.flux.density;em.line.HIfloatnullablel_MHILimit flag on MHImeta.code.errorcharMHIHI masssolMassphys.masschare_MHILower (or symmetric) uncertainty in MHIsolMassstat.errorcharE_MHIUpper uncertainty in MHIsolMassstat.error;stat.maxcharrPos[5/21] Reference for RA/DE positions (6)meta.ref;pos.frameintr_Vel[5/27]? Reference for Vel (6)meta.ref;pos.frameintnullabler_Dist[5/18] Reference for Dist (6)meta.ref;pos.frameintLv[86/1500000000]? Luminosity, solar unitssolLumphys.luminosityfloatnullablerh[14/3065]? Half-light radius, parsecspcphys.size.radiusintnullablel_sigmaLimit flag on sigmameta.code.errorcharsigma[1.2/92]? Stellar velocity dispersion, {sigma}_*_km/sphys.veloc.dispersionfloatnullablesigma2[7.2/61]? Gas velocity dispersion (7)km/sphys.veloc.dispersionfloatnullableDMW[19/1945] Distance from the center of Milky Waykpcpos.distanceintDM31[27/2209] Distance from the center of M31kpcpos.distanceintDLG[-271/1702] Distance from the Local Group surface (8)kpcpos.distanceintJ/ApJ/913/53/table3Median orbital parameters and halo densitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDwarf galaxy namemeta.id;meta.maincharf_NameNotes or flags on Name (1)meta.codecharrperi[3/417] Dwarf galaxy perigalacticonkpcpos.distanceintE_rperi[0.3/85] Upper uncertainty in rperikpcstat.error;stat.maxfloate_rperi[0.3/115] Lower uncertainty in rperikpcstat.errorfloatvperi[214/955] Dwarf galaxy velocity at perigalacticonkm/sphys.velocinte_vperi[9/471] Uncertainty in vperikm/sstat.errorintnhalo-peri[3.5e-7/0.0009] Minimum MW halo gas density (2)cm**-3phys.density;stat.minfloatE_nhalo-peri[1e-6/0.0007] Upper uncertainty in nhalo-pericm**-3stat.error;stat.maxfloate_nhalo-peri[3e-7/0.0004] Lower uncertainty in nhalo-pericm**-3stat.errorfloatrapo[37/3865] Dwarf galaxy apogalacticonkpcpos.distanceintE_rapo[4/2033] Upper uncertainty in rapokpcstat.error;stat.maxinte_rapo[3/1814] Lower uncertainty in rapokpcstat.errorintvapo[34/931] Dwarf galaxy velocity at apogalacticonkm/sphys.velocinte_vapo[5/482] Uncertainty in vapokm/sstat.errorintnhalo-apo[9.3e-6/0.006] Minimum MW halo gas density (2)cm**-3phys.density;stat.minfloatE_nhalo-apo[6e-5/0.02] Upper uncertainty in nhalo-apocm**-3stat.error;stat.maxfloate_nhalo-apo[8.6e-6/0.004] Lower uncertainty in nhalo-apocm**-3stat.errorfloat