J/MNRAS/454/3722ivo://CDS.VizieR/J/MNRAS/454/3722doi:10.26093/cds/vizier.74543722CDSSartori L.F.Schawinski K.Treister E.Trakhtenbrot B.Koss M.,Shirazi M.Oh K.2024-08-15T20:16:12Z2016-09-20T13:24:39ZCDS support team

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

cds-question@unistra.frgalaxiesactive-galactic-nucleiWe investigated AGN activity in low-mass galaxies, an important regime that can shed light on to black hole (BH) formation and evolution, and their interaction with their host galaxies. We identified 336 AGN candidates from a parent sample of ~48000 nearby low-mass galaxies (M*<=10^9.5^M_{sun}_, z<0.1) in the Sloan Digital Sky Survey. We selected the AGN using the classical BPT diagram, a similar optical emission line diagnostic based on the HeII {lambda}4686 line, and mid-IR colour cuts. Different criteria select host galaxies with different physical properties such as stellar mass and optical colour and only 3 out of 336 sources fulfil all three criteria. This could be in part due to selection biases. The resulting AGN fraction of ~0.7 percent is at least one order of magnitude below the one estimated for more massive galaxies. At optical wavelengths, the HeII-based AGN selection appears to be more sensitive to AGN hosted in star-forming galaxies than the classical BPT diagram, at least in the low-mass regime. The archival X-ray and radio data available for some of the AGN candidates seem to confirm their AGN nature, but follow-up observations are needed to confirm the AGN nature of the rest of the sample, especially in the case of mid-IR selection. Our sample will be important for future follow-up studies aiming to understand the relation between BHs and host galaxies in the low-mass regime.2015MNRAS.454.3722Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/3722CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/3722https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/3722http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/3722https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/3722https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/3722http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/3722GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/454/3722/tablea (BPT (tablea A1), HeII (table A2-A3) and Mid-IR (tables A4-A7) selected AGN candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/454/3722/tablea?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/454/3722/tablea?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/454/3722/tablea?GETtext/xml+votable180.050000true181.94212543.12636110.0055555555555555566/4109 4130 4168 4215 4251 4257-4258 4298 4314 4324 4364 4367 4395 4423 4503 4513 4516 4531 4543 4663 4685 4687 4707 4724 4732 4738 4743 4796 4814 4829 4834 4840 4911 4943 4961 4968 5016 5065 5081 5120 5133 5180 5204 5254 5261 5278 5376 5415 5472 5513 5557 5575 5598 5617 5636 5671 5687 5718 5733 5790 5848 5902 6005 6047 6124 6127-6128 6221 6442 6474 6481 6488 6546 6609 6996 7172-7173 7218 7226 7315 7318 7340 7361 7371-7372 7426 7494 7522 7538 7579 8193 8204 8262 8390 8416 8431 8445 8449 8507 8530 8591 8615 8646 8685 8706 8714 8725 8744 8820 8841 8843 8891 8902-8903 8914 8951 8991 8993 8996 9096 9182 9260 9269 9329 9350 9383 9632 9647 9736 9764 9803 9833 9863 10016 10024 10104 10180 10200 10280 10287 10308 10324 10332 10392 10409 10432 10435 10450-10451 10459 10519 10524 10528 10638 10661 10685 10690 10752 10773 10816 10818 10846 10862 10924 10937 10951 10997 11073 11101 11104 11107 11173 11183 11229 11283 11302 11433 11514 16894 17234 17244 17502 17581 17601 17742 17747 17816 18012 18017 18024 18029 18061 18091 18096 18098 18387-18388 18521 18526 18586 18767 18774 18785 18840 18851 19028 21877 21879 21970 22012 22719 23181 23210-23211 25852 25916 25943 25974 26025 26051 26057 26065 26204 26232 26324 26337 26346 26353 26400 26411 26451 26460 26504 26510 26611 26617 26968 26971 26973 27062 27072 27075 27109 27111 27231 27243 27291 27301 27318 27329 27331 27366 27403 27409 27412 27431 27439 27455 27481 27494 27499 27505 27562 27567 27581 27600 27609 27612 27623 27628 27654 27686 27693 27719 27725 27732 27734 27742 27788 27795 27892 27919 27975 28016 28059 28069 28147 28165 28199 28230 28240 28252 28280 28290 28294 28321 28324 28336 28384 28392 28401 28435 28438 28470 28473 28547-28548 28556 28579 28591 28594 28597 28599 28612 28638 28653 31459 31487 31619 31633 31638 31651 31725 32410 32440 36759 36779 49099https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/454/3722?format=asciidefaultJ/MNRAS/454/3722/tableaBPT (tablea A1), HeII (table A2-A3) and Mid-IR (tables A4-A7) selected AGN candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSelType of selectionmeta.codecharIDID numbermeta.id;meta.mainintn_ID[abc*, ] Notes on ID (1)meta.notecharRAJ2000Rigth ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainMPFSDSS MJD_Plate_Fibremeta.idcharzRedshiftsrc.redshiftfloatlogM*? Stellar masslog(solMass)phys.massfloatnullableL[OIII]? [OIII] luminositylog(1e-07W)phys.luminosityfloatnullableBPT[V] Classified as AGN with BPT selection criterium (2)meta.codecharHeII[V] Classified as HeII with HeII selection criterium (3)meta.codecharMidIRS[V] Classified as AGN with Mid-IR Stern et al. (2012ApJ...753...30S) selection criteriummeta.codecharMidIRJ[V] Classified as AGN with Mid-IR Jarrett et al. (2011ApJ...735..112J) selection criteriummeta.codecharSpInteractive spectrum from SDSSmeta.ref.urlchar