J/MNRAS/465/3784ivo://CDS.VizieR/J/MNRAS/465/3784doi:10.26093/cds/vizier.74653784CDSBizyaev D.V.Kautsch S.J.Sotnikova N.Y.Reshetnikov V.P.Mosenkov A.V.2024-08-16T20:20:15Z2019-05-02T13:22:46ZCDS support team

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

cds-question@unistra.frgalaxiesgalaxy-classification-systemsradial-velocityWe study the properties of galaxies with very thin discs (VTDs) using a sample of 85 objects whose stellar disc radial-to-vertical scale ratio determined from photometric decomposition, exceeds 9. We present evidences of similarities between the VTD galaxies and low surface brightness (LSB) disc galaxies, and conclude that both small and giant LSB galaxies may reveal themselves as VTD, edge-on galaxies. Our VTD galaxies are mostly bulgeless, and those with large radial scalelength tend to have redder colours. We performed spectral observations of 22 VTD galaxies with the Dual Imaging Spectrograph on the 3.5 m telescope at the Apache Point Observatory. The spectra with good resolution (R~5000) allow us to determine the distance and the ionized gas rotation curve maximum for the galaxies. Our VTD galaxies have low dust content, in contrast to regular disc galaxies. Apparently, VTD galaxies reside in specific cosmological low-density environments and tend to have less connection with filaments. Comparing a toy model that assumes marginally low star formation in galactic discs with obtained gas kinematics data, we conclude that there is a threshold central surface density of about 88M_{sun}_/pc^2^, which we observe in the case of very thin, rotationally supported galactic discs.2017MNRAS.465.3784Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/3784CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/787/24 : Structural parameters of true edge-on galaxies (Bizyaev+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/3784https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/3784http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/3784https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/3784https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/3784http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/3784GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/465/3784/table1 (Selected VTD galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/3784/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/3784/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/3784/table1?GETtext/xml+votable180.050000true2.6943861-0.89235190.005555555555555556Cone search capability for table J/MNRAS/465/3784/table2 (Spectral observations of VTD galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/3784/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/3784/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/3784/table2?GETtext/xml+votable180.050000true2.6943861-0.89235190.0055555555555555566/20 337 388 647 722 2895 4129 4439 4460 4516 5004 5115 5555 5592 5735 6119 6228 6604 7295 7302 7374 7784 8303 8551 8689 9003 9238 9426 9440 9613 9834 9923 10592 10635 10955 11100 11235 11388 11796 16725 17232 17239 17244 17912 18003 18035 18083 18830 19581 19778 19802 19947 19963 20008 20430 21871 22462 23212 25909 26080 26547 26960 27016 27197 27206 27277 27508 27564 27800 27825 27828 27835 27909 27980 28091 28332 28367 28385 31420 31434 31628 31669 31673 49078https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/465/3784?format=asciiOpticaldefaultJ/MNRAS/465/3784/table1Selected VTD galaxiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameEGIS Namemeta.id;meta.maincharhRadial scalelengthkpcphys.sizefloatz0Verticel scaleheightkpcphys.sizefloath/z0Scale ratiophys.size;arith.ratiofloat(r-i)0Intergated colour index r-imagphot.color;em.opt.R;em.opt.IfloatQual[YN] Quality flag (1)meta.code.qualchar_RAPositions from J/ApJ/787/24 (right ascension part)degpos.eq.ra;meta.main_DEPositions from J/ApJ/787/24 (declination part)degpos.eq.dec;meta.mainJ/MNRAS/465/3784/table2Spectral observations of VTD galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameEGIS Namemeta.id;meta.maincharn_Name[b] Note on Object (1)meta.notecharDateObservation datetime.epoch;obsnullableExpTimeExposure timemintime.duration;obs.exposureintHRVHeliocentric Radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintVmaxAmplitude of the rotation curvekm/ssrc.var.amplitudeintn_Vmax[acd] note on Vmax (1)meta.notechar_RAPositions from J/ApJ/787/24 (right ascension part)degpos.eq.ra;meta.main_DEPositions from J/ApJ/787/24 (declination part)degpos.eq.dec;meta.main