J/MNRAS/442/3544ivo://CDS.VizieR/J/MNRAS/442/3544doi:10.26093/cds/vizier.74423544CDSFoster C.Lux H.Romanowsky A.J.Martinez-Delgado D.Zibetti S.,Arnold J.A.Brodie J.P.Ciardullo R.Gabany R.J.Merrifield M.R.,Singh N.Strader J.2024-08-09T20:15:32Z2015-06-23T07:08:19ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryglobular-star-clustersh-ii-regionsplanetary-nebulaevisible-astronomysloan-photometryWe study the dynamics of faint stellar substructures around the Umbrella Galaxy, NGC 4651, which hosts a dramatic system of streams and shells formed through the tidal disruption of a nucleated dwarf elliptical galaxy. We elucidate the basic characteristics of the system (colours, luminosities, stellar masses) using multiband Subaru/Suprime-Cam images. The implied stellar mass ratio of the ongoing merger event is ~1:50. We identify candidate kinematic tracers (globular clusters, planetary nebulae, HII regions) and follow up a subset with Keck/DEIMOS (DEep Imaging Multi-object Spectrograph) spectroscopy to obtain velocities. We find that 15 of the tracers are likely associated with halo substructures, including the probable stream progenitor nucleus. These objects delineate a kinematically cold feature in position-velocity phase space. We model the stream using single test particle orbits, plus a rescaled pre-existing N-body simulation. We infer a very eccentric orbit with a period of ~0.35Gyr and turning points at ~2-4 and ~40kpc, implying a recent passage of the satellite through the disc, which may have provoked the visible disturbances in the host galaxy. This work confirms that the kinematics of low surface brightness substructures can be recovered and modelled using discrete tracers - a breakthrough that opens up a fresh avenue for unravelling the detailed physics of minor merging.2014MNRAS.442.3544Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/442/3544CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/442/3544https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/442/3544http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/442/3544https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/442/3544https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/442/3544http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/442/3544GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/442/3544/candid (Catalog of photometrically selected globular cluster (table2), HII region (table3) and planetary nebula (table4) candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/442/3544/candid?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/442/3544/candid?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/442/3544/candid?GETtext/xml+votable180.050000true190.903262516.39134080.005555555555555556Cone search capability for table J/MNRAS/442/3544/table5 (Summary of measured kinematic tracers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/442/3544/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/442/3544/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/442/3544/table5?GETtext/xml+votable180.050000true190.927708316.39333330.0055555555555555566/27954-27955 279613.923898434900946e-19 3.9965340695493114e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/442/3544?format=asciiOpticaldefaultJ/MNRAS/442/3544/candidCatalog of photometrically selected globular cluster (table2), HII region (table3) and planetary nebula (table4) candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeSimbad column added by the CDSsrc.classcharNameCandidate namemeta.id;meta.maincharn_Name[*] * for spectroscopically confirmedmeta.notechartSimbad column added by the CDSmeta.ref.urlintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.maingmag? Subaru/Suprime g magnitude (not for PN)magphot.mag;em.opt.Bfloatnullablee_gmag? rms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatnullablermag? Subaru/Suprime r magnitude (not for PN)magphot.mag;em.opt.Rfloatnullablee_rmag? rms uncertainty on rmagmagstat.error;phot.mag;em.opt.Rfloatnullableimag? Subaru/Suprime i magnitude (not for PN)magphot.mag;em.opt.Ifloatnullablee_imag? rms uncertainty on imagmagstat.error;phot.mag;em.opt.Ifloatnullablem5007[21/29]? Subaru/Suprime [OIII] (5007{AA}) magnitudemagphot.mag;em.line.OIIIfloatnullablee_m5007? rms uncertainty on m5007magstat.errorfloatnullableJ/MNRAS/442/3544/table5Summary of measured kinematic tracersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeType (Nuclei, PNe, HII or GCs)src.classcharNameNamemeta.id;meta.maincharn_NameSimbad column added by the CDSmeta.ref.urlintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVobsObserved heliocentric corrected recession velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_Vobsrms uncertainty on Vobskm/sstat.errorintn_Vobs[a] a: measured from the higher resolution long-slit spectrum (1)meta.notechargmag? Subaru/Suprime-Cam foreground extinction corrected g' magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag? rms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatnullablen_gmag[c] c: photometry affected by crowding (1)meta.notecharrmag? Subaru/Suprime-Cam foreground extinction corrected r' magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag? rms uncertainty on rmagmagstat.error;phot.mag;em.opt.Rfloatnullablen_rmag[c] c: photometry affected by crowding (1)meta.notecharimag? Subaru/Suprime-Cam foreground extinction corrected i' magnitudemagphot.mag;em.opt.Ifloatnullablee_imag? rms uncertainty on imagmagstat.error;phot.mag;em.opt.Ifloatnullablen_imag[c] c: photometry affected by crowding (1)meta.notecharm5007? Subaru/Suprime-Cam foreground extinction corrected [OIII] (5007{AA}) magnitudemagphot.mag;em.line.OIIIfloatnullablee_m5007? rms uncertainty on m5007magstat.errorfloatnullablen_m5007[b] identified by eye on image (1)meta.notecharDisc[Yes/No] whether or not the kinematics are consistent with the disc of NGC 4651meta.codechar