J/A+A/689/A206ivo://CDS.VizieR/J/A+A/689/A206doi:10.26093/cds/vizier.36890206CDSZaragoza-Cardiel J.Smith B.J.Jones M.G.Giroux M.L.Toner S.,Alzate J.A.Fernandez-Arenas D.Mayya Y.D.Ortiz-Leon G.Portilla M.2024-11-29T20:05:40Z2024-09-13T11:18:20ZCDS support team

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

cds-question@unistra.frinteracting-galaxiesspectroscopyredshiftedTidal interactions between galaxies often give rise to tidal tails, which can harbor concentrations of stars and interstellar gas resembling dwarf galaxies. Some of these tidal dwarf galaxies (TDGs) have the potential to detach from their parent galaxies and become independent entities, but their long-term survival is uncertain. In this study, we conducted a search for detached TDGs associated with a sample of 39 interacting galaxy pairs in the local Universe using infrared, ultraviolet, and optical images. We employed IR colors and UV/optical/IR spectral energy distributions to identify potential interlopers, such as foreground stars or background quasars. Through spectroscopic observations using the Boller and Chivens spectrograph at San Pedro Martir Observatory, we confirmed that six candidate TDGs are at the same redshift as their putative parent galaxy pairs. We identified and measured emission lines in the optical spectra and calculated nebular oxygen abundances, which range from log(O/H)=8.10+/-0.01 to 8.51+/-0.02. We have serendipitously discovered an additional detached TDG candidate in Arp72 using available spectra from SDSS. Utilizing the photometric data and the CIGALE code for stellar population and dust emission fitting, we derived the stellar masses, stellar population ages, and stellar metallicities for these detached TDGs. Compared to standard mass-metallicity relations for dwarf galaxies, five of the seven candidates have higher than expected metallicities, confirming their tidal origins. One of the seven candidates remains unclear due to large uncertainties in metallicity, and another has stellar and nebular metallicities compatible with those of a preexisting dwarf galaxy. The latter object is relatively compact in the optical relative to its stellar mass, in contrast to the other candidate TDGs, which have large diameters for their stellar masses compared to most dwarf galaxies. The derived stellar population ages range from 100 Myr to 900 Myr, while the inferred stellar masses are between 2x10^6^M_{sun}_ and 8x10^7^M_{sun}_. Four of the six TDGs are associated with the gas-rich M51-like pair Arp 72, one TDG is associated with a second M51-like pair Arp 86, and another is associated with Arp 65, an approximately equal mass pair. In spite of the relatively low stellar masses of these TDGs, they have survived for at least 100-900Myrs, suggesting that they are stable and in dynamical equilibrium. We conclude that encounters with a relatively low-mass companion (1/10th-1/4th of the mass of the primary) can also produce long-lasting TDGs.2024A&A...689A.206Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A206CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/689/A206https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/689/A206http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/689/A206https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/689/A206https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/689/A206http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/689/A206GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/689/A206/table1 (Observing log, and derived redshift)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A206/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A206/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A206/table1?GETtext/xml+votable180.050000true5.488235322.37899870.005555555555555556Cone search capability for table J/A+A/689/A206/list (List of fits spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A206/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A206/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A206/list?GETtext/xml+votable180.050000true5.4882422.3790.0055555555555555566/8509 17252 19900 20371 25344 282782.040811542443644e-19 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/689/A206?format=asciidefaultJ/A+A/689/A206/table1Observing log, and derived redshiftrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGalaxy identifiermeta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDateDate of observationtime.epochnullableTexpExposure timemintime.duration;obs.exposureintNobsNumber of times observedmeta.numberintSpRange1Spectral Range of the observation0.1nminstr.bandwidth;obsintSpRange2Spectral Range of the observation0.1nminstr.bandwidth;obsintzMeasured Redshiftsrc.redshiftdoublee_zMeasured Redshift uncertaintystat.error;src.redshiftfloatJ/A+A/689/A206/table2Extinction corrected emission line fluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFHaHalpha flux1e-20W.m**-2phot.flux;em.line.Halphafloate_FHaHalpha flux uncertainty1e-20W.m**-2stat.errorfloatFHbHbeta flux1e-20W.m**-2phot.flux;em.line.Hbetafloate_FHbHbeta flux uncertainty1e-20W.m**-2stat.errorfloatF[OIII]4959? [OIII]4959 flux1e-20W.m**-2phot.fluxfloatnullablee_F[OIII]4959? [OIII]4959 flux uncertainty1e-20W.m**-2stat.errorfloatnullableF[OIII]5007? [OIII]5007 flux1e-20W.m**-2phot.fluxfloatnullablee_F[OIII]5007? [OIII]5007 flux uncertainty1e-20W.m**-2stat.errorfloatnullableF[NII]6548? [NII]6548 flux1e-20W.m**-2phot.fluxfloatnullablee_F[NII]6548? [NII]6548 flux uncertainty1e-20W.m**-2stat.errorfloatnullableF[NII]6583? [NII]6583 flux1e-20W.m**-2phot.fluxfloatnullablee_F[NII]6583? [NII]6583 flux uncertainty1e-20W.m**-2stat.errorfloatnullableF[SII]6717? [SII]6717 flux1e-20W.m**-2phot.fluxfloatnullablee_F[SII]6717? [SII]6717 flux uncertainty1e-20W.m**-2stat.errorfloatnullableF[SII]6731? [SII]6731 flux1e-20W.m**-2phot.fluxfloatnullablee_F[SII]6731? [SII]6731 flux uncertainty1e-20W.m**-2stat.errorfloatnullableE(B-V)? Color excessmagphot.color.excessfloatnullablee_E(B-V)? Color excess uncertaintymagstat.errorfloatnullable12+log(O/H)? Oxygen nebular abundancephys.abundfloatnullablee_12+log(O/H)? Oxygen nebular abundance uncertaintystat.errorfloatnullableIDGalaxy identifiermeta.id;meta.maincharJ/A+A/689/A206/table3GALEX, Spitzer, and DESI-LIS PhotometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGalaxy identifiermeta.id;meta.maincharFFUVFUV Flux from GALEXmJyphot.flux;em.UVdoublee_FFUVFUV Flux from GALEX uncertaintymJystat.errordoubleFNUVNUV Flux from GALEXmJyphot.flux;em.UVdoublee_FNUVNUV Flux from GALEX uncertaintymJystat.errordoublel_FuSDSSLimit flag on FuSDSSmeta.code.errorcharFuSDSSu Flux from SDSSmJyphot.mag;em.opt.Ufloate_FuSDSS? u Flux from SDSS uncertaintymJystat.errorfloatnullableFgSDSSg Flux from SDSSmJyphot.mag;em.opt.Bfloate_FgSDSSg Flux from SDSS uncertaintymJystat.errorfloatl_FrSDSSLimit flag on FrSDSSmeta.code.errorcharFrSDSSr Flux from SDSSmJyphot.mag;em.opt.Rfloate_FrSDSS? r Flux from SDSS uncertaintymJystat.errorfloatnullableFiSDSSi Flux from SDSSmJyphot.mag;em.opt.Ifloate_FiSDSS? i Flux from SDSS uncertaintymJystat.errorfloatnullableFzSDSSz Flux from SDSSmJyphot.mag;em.opt.Ifloate_FzSDSS? z Flux from SDSS uncertaintymJystat.errorfloatnullableFgDESg Flux from DESI Legacy Imaging SurveymJyphot.mag;em.opt.Bfloate_FgDESg Flux from DESI Legacy Imaging Survey uncertaintymJystat.errorfloatFrDESr Flux from DESI Legacy Imaging SurveymJyphot.mag;em.opt.Rfloate_FrDESr Flux from DESI Legacy Imaging Survey uncertaintymJystat.errorfloatFzDESz Flux from DESI Legacy Imaging SurveymJyphot.mag;em.opt.Ifloate_FzDES? z Flux from DESI Legacy Imaging Survey uncertaintymJystat.errorfloatnullableF3.6um? 3.6 microns Flux from SpitzermJyphot.mag;em.IR.3-4umfloatnullablee_F3.6um? 3.6 microns Flux from Spitzer uncertaintymJystat.errorfloatnullableF4.5um? 4.5 microns Flux from SpitzermJyphot.mag;em.IR.4-8umfloatnullablee_F4.5um? 4.5 microns Flux from Spitzer uncertaintymJystat.errorfloatnullableF5.8um? 5.8 microns Flux from SpitzermJyphot.flux.density;em.IR.4-8umfloatnullablee_F5.8um? 5.8 microns Flux from Spitzer uncertaintymJystat.errorfloatnullableF8um? 8 microns Flux from SpitzermJyphot.flux.density;em.IR.8-15umfloatnullablee_F8um? 8 microns Flux from Spitzer uncertaintymJystat.errorfloatnullableF24um? 24 microns Flux from SpitzermJyphot.flux.density;em.IR.15-30umfloatnullablee_F24um? 24 microns Flux from Spitzer uncertaintymJystat.errorfloatnullablel_FiSDSSLimit flag on FiSDSSmeta.code.errorcharl_FzSDSSLimit flag on FzSDSSmeta.code.errorcharl_FzDESLimit flag on FzDESmeta.code.errorcharl_F4.5umLimit flag on F4.5ummeta.code.errorcharl_F5.8umLimit flag on F5.8ummeta.code.errorcharl_F24umLimit flag on F24ummeta.code.errorcharJ/A+A/689/A206/table5Output results from CIGALE fitsZStellar metallicityphys.abund.ZfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGalaxy identifiermeta.id;meta.maincharM*Stellar MasssolMassphys.massdoublee_M*Stellar Mass uncertaintysolMassstat.errordoublee_ZStellar metallicity uncertaintystat.error;src.redshiftfloatSFRStar Formation RatesolMass/yrphys.SFRfloate_SFRStar Formation Rate uncertaintysolMass/yrstat.error;phys.SFRfloatfBurstFraction of stars formed in the recent burst relative to the total mass of stars ever formedmeta.numberfloate_fBurstFraction of stars formed in the recent burst relative to the total mass of stars ever formed uncertaintystat.errorfloatBurstAgeAge of the recent burstMyrtime.agedoublee_BurstAgeAge of the recent burst uncertaintyMyrstat.errordoubleJ/A+A/689/A206/listList of fits spectraNxNumber of pixels along X-axismeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainblambdaLower value of wavelength interval0.1nmem.wlfloatBlambdaUpper value of wavelength interval0.1nmem.wlfloatdlambdaWavelength resolution0.1nmspect.resolutiondoublespShow the spectrummeta.ref.urlcharFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharsizeSize of FITS fileKibytephys.size;meta.fitsintObs.dateObservation datestime.epoch;obsnullable