J/MNRAS/490/566ivo://CDS.VizieR/J/MNRAS/490/566doi:10.26093/cds/vizier.74900566CDSJanowiecki S.Jones M.G.Leisman L.Webb A.2024-08-20T20:14:15Z2023-02-17T13:06:35ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryh-i-line-emissionastrometryvisible-astronomyWe explore the environment of 252 HI-bearing ultra-diffuse galaxies (HUDs) from the 100 per cent ALFALFA survey catalogue in an attempt to constrain their formation mechanism. We select sources from ALFALFA with surface brightnesses, magnitudes, and radii consistent with other samples of ultra-diffuse galaxies (UDGs) without restrictions on their isolation or environment, more than doubling the previously reported ALFALFA sample. We quantify the galactic environment of HUDs using several metrics, including n^th^ nearest neighbour, tidal influence, membership in a group/cluster, and distance from nearest group/cluster or filament. We find that HUDs inhabit the same environments as other samples of HI-selected galaxies and that they show no environmental preference in any metric. We suggest that these results are consistent with a picture of the extreme properties of HUDs being driven by internal mechanisms and that they are largely unperturbed by environmental impacts. While environmental effects may be necessary to convert HUDs into gas-poor cluster UDGs, these effects are not required for diffuse galaxies to exist in the first place.2019MNRAS.490..566Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/490/566CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/842/133 : HI-bearing ultra-diffuse ALFALFA galaxies (Leisman+, 2017)J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018)II/294 : The SDSS Photometric Catalog, Release 7https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/490/566https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/490/566http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/490/566https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/490/566https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/490/566http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/490/566GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/490/566/tablea1 (Observations and derived optical properties of HUDs-R and HUDs-B samples)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/490/566/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/490/566/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/490/566/tablea1?GETtext/xml+votable180.050000true0.9891675.4011110.0055555555555555566/8 37 39 524 610 650 652 663 671 692 705 745 751 949 986 2126 2151 2183 2221 2223 2245 2249 2275 2308 2312 2564 2568 2597 2604 4168 4183 4199 4245 4381 4401 4405 4440 4605 4630 4653 4821-4822 4843 4929 4936 4961 4966 4968 4990 4998 5001 5012 5015 5019 5042 5057 5120 5122 5144 5175 5184 5291 5315 6196 8256 8375 8418 8447 8452 8495 8692 8720 8740 8840 8871 8899 8922 8953 8970 8990 8999 9029 9099 9121 9261 9265 10242 10286 10290 10295 10351 10398 10428 10473 10752 12562 12791 13363 13397 13404 13413 13426-13427 13434 13519 17777 17819 17853 17864 18006 18093 18101 18106 18135 18137 18141 18144 18233 18251 18267 18300 18308 18321 18351 18371 18404-18405 18847 18868-18869 18897 18925 18934 19225 19250 19275 19308 19424 19436 19483 19521 19529 19590 19643 19752 19784 19841 19955 19973 19980 19993 19996 20002-20003 20007 20019 20039-20040 20054 20147 20150 20167 20190 20232 20282 20302 20312 20325 20352 20369 20388 20394 20402-20403 20416 21849 22380 22389 25959 25970 26029 26044 26222 26285 26322 26347 26385 26418 26421 26439 26443 26458 26462 26465 26536 26546 26572 26611 27087 27090 27285 27324-27325 27360 27383 27444 27474 27480 27525 27567 27597 27633 27664 27706 27711 27715 27718 27740 27749 27829 27877 27887 27890 27896 27938 28153 28157 28159 28171-28172 28207 28250 28260 28274 28280 28345 28390 28419-28420 28427 28477 28556 28566 31337 31442 31531 31664https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/490/566?format=asciiOpticalRadiodefaultJ/MNRAS/490/566/tablea1Observations and derived optical properties of HUDs-R and HUDs-B samplesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleHUDs sample (HUDs-R (71 galaxies) or HUDs-B (183 galaxies))src.samplecharNameGalaxy AGC identifier (NNNNNN)meta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainDDistanceMpcpos.distancefloatlogMHILogarithm of the HI mass of the galaxysolMassphys.massfloatgMAGAbsolute magnitude in the SDSS g-bandmagphys.magAbsfloatmugSurface brightness in the SDSS g-bandmag.arcsec**-2phot.mag.sbfloate_mugError on mugmag.arcsec**-2stat.errorfloatregHalf-light radius in the SDSS g-bandarcsecphys.angSize;srcfloate_regError on regarcsecstat.errorfloat