Galaxy Zoo: Clump Scout: clumpy SDSS gal. at z~<0.2 J/ApJ/931/16 ivo://CDS.VizieR/J/ApJ/931/16 doi:10.26093/cds/vizier.19310016 CDS Adams D. Mehta V. Dickinson H. Scarlata C. Fortson L. Kruk S.,Simmons B. Lintott C. 2024-11-06T20:25:48Z 2024-05-06T14:28:58Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr galaxies visible-astronomy galaxy-classification-systems redshifted sloan-photometry star-forming-regions Massive, star-forming clumps are a common feature of high-redshift star-forming galaxies. How they formed, and why they are so rare at low redshift, remains unclear. In this paper we identify the largest sample yet of clumpy galaxies (7050) at low redshift using data from the citizen science project Galaxy Zoo: Clump Scout, in which volunteers classified 58550 Sloan Digital Sky Survey (SDSS) galaxies spanning redshift 0.02<z<0.15. We apply a robust completeness correction by comparing with simulated clumps identified by the same method. Requiring that the ratio of clump to galaxy flux in the SDSS u band be greater than 8% (similar to clump definitions used by other works), we estimate the fraction of local star-forming galaxies hosting at least one clump (fclumpy) to be 3.22_-0.34_^+0.38^%. We also compute the same fraction with a less stringent relative flux cut of 3% (12.68_-0.88_^+1.38^%), as the higher number count and lower statistical noise of this fraction permit finer comparison with future low-redshift clumpy galaxy studies. Our results reveal a sharp decline in fclumpy over 0<z<0.5. The minor merger rate remains roughly constant over the same span, so we suggest that minor mergers are unlikely to be the primary driver of clump formation. Instead, the rate of galaxy turbulence is a better tracer for fclumpy over 0<z<1.5 for galaxies of all masses, which supports the idea that clump formation is primarily driven by violent disk instability for all galaxy populations during this period. 2022ApJ...931...16A https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/931/16 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to II/306 : The SDSS Photometric Catalog, Release 8 (Adelman-McCarthy+, 2011) V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020) J/ApJ/428/693 : Rosette Nebula & Maddalena Cloud structures (Williams+ 1994) J/MNRAS/435/2835 : Morphological types from Galaxy Zoo 2 (Willett+, 2013) J/other/NatAs/2.76 : MACSJ1206.2-08474714 clumps photometry (Cava+, 2018) J/ApJ/853/108 : Clumpy galaxies in CANDELS. II. 0.5<=z<3.0 (Guo+, 2018) J/MNRAS/489/2792 : Clumps and satellites impact on galaxy mass (Zanella+, 2019) J/ApJ/912/49 : Clumps in z<0.06 SDSS Stripe 82 sample (Mehta+, 2021) http://z.umn.edu/ClumpScout : Clump Scout homepage on Galaxy Zoo http://wwwmpa.mpa-garching.mpg.de/SDSS/DR7/ : MPA-JHU homepage https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/931/16 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/931/16 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/931/16 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/931/16 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/931/16 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/931/16 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/931/16/table3 (*Clump Scout catalog) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/931/16/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/931/16/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/931/16/table3? 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27838-27839 27842 27844 27846-27847 27849-27851 27853-27854 27864 27866-27868 27870-27871 27877-27878 27881-27883 27888 27891 27896 27899-27900 27902-27904 27906-27907 27910 27913-27914 27918 27921 27923 27926-27928 27930-27933 27938-27939 27942 27944-27945 27948 27951 27956-27957 27959 27962 27964 27966 27970-27971 27974-27975 27977 27979 27981-27982 27984 27988 27992 27995 27997-27999 28001 28003 28005-28007 28009 28011-28012 28016-28018 28020-28021 28023 28028-28029 28031-28032 28034 28036-28037 28039 28047-28048 28050-28053 28061-28062 28064-28065 28067 28071 28073-28075 28080 28082-28084 28088-28089 28091-28093 28095-28096 28102 28104 28107-28109 28111-28112 28115-28116 28118 28121-28122 28124-28125 28129 28132 28135 28137 28139-28140 28142-28143 28145-28146 28153-28157 28159 28166-28168 28173-28175 28177-28178 28180 28182-28183 28189 28191 28193-28197 28199 28202-28205 28208 28210 28212 28214 28220-28221 28223 28225-28227 28229-28231 28233-28238 28240 28243-28244 28247 28257 28259-28260 28262-28263 28268-28269 28271-28273 28275-28276 28278-28279 28284-28286 28288-28289 28291 28296 28298-28302 28304 28306-28308 28310 28314-28316 28318-28319 28324 28327 28333-28337 28339 28341 28348 28350 28352-28353 28361-28363 28368 28370-28372 28374-28375 28384-28385 28387-28388 28390-28393 28395 28401 28403 28424 28426 28428-28429 28431-28433 28440-28441 28444 28446-28447 28449 28457 28459 28461-28464 28466-28468 28471 28473 28475 28477-28479 28486-28487 28496 28499-28502 28505 28507 28509-28511 28513 28515-28518 28528-28529 28531 28537-28539 28541-28542 28544-28545 28547-28549 28551 28557 28560 28563-28564 28566 28569 28576 28579-28581 28589 28591-28594 28597-28599 28601-28603 28613 28615 28620-28622 28625-28627 28633 28635-28636 28638-28639 28643-28645 28647 28649 28651-28653 28655 28657-28659 28664-28665 28667-28668 28670 30031 30033 30035 30041-30044 30064 31291-31292 31354-31355 31359 31363 31365 31367 31372-31373 31376 31378 31385 31389-31392 31394 31407 31409-31413 31415 31417-31419 31432 31434-31435 31443-31445 31447 31449-31451 31453-31455 31458 31461-31463 31476-31478 31529-31531 31533-31534 31545 31547 31550 31599 31616 31620 31622-31623 31625 31629-31631 31633-31634 31636 31638-31639 31644 31646-31650 31656 31658-31659 31664-31665 31667 31682 31689-31690 31697-31698 31704 31712 31714-31715 31724 31726-31727 31729 31731-31732 31740-31741 32399 32402-32403 32406 32408 32410-32412 32414-32415 32423 32427 32439 32462 32481-32484 32486 32489-32492 32494 32499 32503 32508 32510-32511 32672 32674 32681-32683 32686 40959 45039 45046-45047 45050-45051 49151 2.040811542443644e-19 6.090060298487514e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/931/16?format=ascii Optical default J/ApJ/931/16/table3 *Clump Scout catalog SimbadName Simbad column added by the CDS meta.id char nullable recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int objID SDSS DR8 object identifier meta.id;meta.main zBFlux [-0.9/112] Background z-band flux uJy.arcsec**-2 phot.flux.density;em.opt.I float NED NED column added by the CDS meta.ref.url char Index [1/8] Clump index meta.number int z [0.02/0.25] SDSS Galaxy redshift src.redshift float RAJ2000 SDSS Galaxy Right Ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 [-3.4/69.1] SDSS Galaxy Declination (J2000) deg pos.eq.dec;meta.main indexed rFWHM [0.6/2.1] SDSS Galaxy image r-band PSF-FWHM arcsec phys.angSize float uGFlux [0/5487] SDSS Galaxy u-band flux uJy phot.flux.density;em.opt.U float e_uGFlux [0/4432] Uncertainty in uGFlux uJy stat.error float gGFlux [0/20501.2] SDSS Galaxy g-band flux uJy phot.flux.density;em.opt.B float e_gGFlux [0/3231] Uncertainty in gGFLux uJy stat.error float rGFlux [0/43581] SDSS Galaxy r-band flux uJy phot.flux.density;em.opt.R float e_rGFlux [0/2686] Uncertainty in rGFLux uJy stat.error float iGFlux [0/62418] SDSS Galaxy i-band flux uJy phot.flux.density;em.opt.I float e_iGFlux [0/4210] Uncertainty in iGFLux uJy stat.error float zGFlux [0/78416] SDSS Galaxy z-band flux uJy phot.flux.density;em.opt.I float e_zGFlux [0/12019] Uncertainty in zGFLux uJy stat.error float RABdeg Central bulge Right Ascension (J2000) deg pos.eq.ra DEBdeg [-3.4/69.1] Central bulge Declination (J2000) deg pos.eq.dec reff [0.001/150] SDSS Galaxy r-band effective radius arcsec phys.angSize float logMs [7.2/12.4] MPA-JHU log galactic stellar mass log(solMass) phys.mass float logSFR [-9981/12] MPA-JHU log galactic star formation rate log(solMass.Gyr**-1) phys.SFR;pos.galactic double logsSFR [-9990/1.8] MPA-JHU log galactic specific star formation rate log(Gyr**-1) phys.SFR;pos.galactic double RACdeg Clump Right Ascension (J2000) deg pos.eq.ra DECdeg [-3.4/69.1] Clump Declination (J2000) deg pos.eq.dec Offset [1/62] Clump offset from central bulge arcsec pos;arith.diff float uCFlux [-6.1/3137] Clump u-band flux uJy phot.flux.density;em.opt.U float e_uCFlux [0.8/9] Uncertainty in uCFlux uJy stat.error float gCFlux [-12.7/10099] Clump g-band flux uJy phot.flux.density;em.opt.B double e_gCFlux [0.3/7] Uncertainty in gCFlux uJy stat.error float rCFlux [-14.1/14931] Clump r-band flux uJy phot.flux.density;em.opt.R double e_rCFlux [0.5/9] Uncertainty in rCFlux uJy stat.error float iCFlux [-15.4/16814] Clump i-band flux uJy phot.flux.density;em.opt.I double e_iCFlux [0.7/10] Uncertainty in iCFlux uJy stat.error float zCFlux [-24.6/25762] Clump z-band flux uJy phot.flux.density;em.opt.I double e_zCFlux [2.6/29] Uncertainty in zCFlux uJy stat.error float uBFlux [-0.3/26] Background u-band flux uJy.arcsec**-2 phot.flux.density;em.opt.U float e_uBFlux [0.7/3] Uncertainty in uBFlux uJy.arcsec**-2 stat.error float gBFlux [-0/63.5] Background g-band flux uJy.arcsec**-2 phot.flux.density;em.opt.B float e_gBFlux [0.3/1.3] Uncertainty in gBFlux uJy.arcsec**-2 stat.error float e_zBFlux [2.4/7.1] Uncertainty in zBFlux uJy.arcsec**-2 stat.error float fLu [0/50319]? Estimated clump/galaxy near-UV flux ratio phot.flux;arith.ratio;em.UV double nullable Frac [0/1] Volunteer unusual fraction stat.fit.param float Pec [0/1] Unusual flag (1=true) meta.code int Comp [0.01/0.9]? Completeness estimate meta.note float nullable Sloan Display the online SDSS DR14 data for this object meta.ref.url char Sample Galaxy sample ("regular":14268 occurrences or "extra") src char rBFlux [0/61] Background r-band flux uJy.arcsec**-2 phot.flux.density;em.opt.R float e_rBFlux [0.5/1.5] Uncertainty in rBFlux uJy.arcsec**-2 stat.error float iBFlux [-0.01/87] Background i-band flux uJy.arcsec**-2 phot.flux.density;em.opt.I float e_iBFlux [0.7/2] Uncertainty in iBFlux uJy.arcsec**-2 stat.error float