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Galaxy Morphologies With Galaxy Morphologies with Karen Masters ICG, Portsmouth Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters 6.5 years of Galaxy Zoo! July 2007- Feb 2009- Sept 2009- Apr 2010- Feb 2009 April 2010 Jan 2010 Aug 2012 Aug 2012 - Aug 2013 - Oct 2013 - Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Data Access •" www.data.galaxyzoo.org •" Available in Casjobs (DR8 and DR10) •" Lintott et al. 2011 – for GZ1 •" Willett et al. 2013 – for GZ2 •" Ask us about other morphologies Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters The Zooites (Our Telescope/Computer) (Raddick et al. 2009 astroph/0909.2925) Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters The Zooites (Our Telescope/Computer) (Raddick et al. 2009 astroph/0909.2925) Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters The Zooites (Our Telescope/Computer) (log) Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters The Questions Galaxy Zoo: Bars in Disk Galaxies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ubble: K& L& M& A#&?/54.& P/0$& + questions 3((.4/5'(& E$%.(& F.(4.(& 9#$*,.'?5.& F#(.& N& >'9O$&$.55& about clumpy $%'9&N& E?G*#/0& galaxies D/0$&5'9.& D#"*9'9$& Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Figure 1. We present a schematic diagram of the decision tree for GZ2 classifications. We provide the questions asked of the user for each SDSS galaxy image (starting with the top question first). For each question, we provide the possible answers they are allowed. Depending on their answers, the user can navigate down different branches of the tree. Figure 2. (Top row) Examples of GZ2 classified barred disk galaxies. (Bottom row) Examples of GZ2 classified disk galaxies with no bar. The galaxies on the left are at z ! 0.02, the galaxies in the middle at z ! 0.04 and the galaxies on the right are at z ! 0.06, thus spanning the full redshift range of the volume–limited sample used herein (see Section 2). The images are taken from the SDSS (gri composite) and are one arcminute squared in size. (These images differ to those presented to users for classification, which are scaled using the Petrosian radius of the galaxy.) "c 2010 RAS, MNRAS 000, 1–9 Clicks to Classifications (our data reduction) Collect 20-40 answers for each question (raw vote fraction) Weight users by consistency Correct for observational biases (Bamford et al. 2009, Willett et al. 2013) “Debiased” classification likelihoods pspiral, pbar etc. Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Is it Reliable? p>0.8 ? E E/S0 S0 S0/a Sa Sab Sb Sbc Sc Scd Sd Sdm Im Comparison with Fukugita et al. 2007 (cross over is 1300 galaxies) Lintott et al. 2008 Lintott et al. 2011 •" agree with experts more than 90% of the time •" increase sample size by at least factor of 10 www.data.galaxyzoo.org All galaxies looked at by at least 20 people (median 38). Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Is it Reliable (cont) EFIGI (Baillard et al. 2011) – expert visual classification Huertas-Company et al. 2011 (automated based on shape, colour, luminosity and redshift) Willett et al. 2013 www.data.galaxyzoo.org Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Galaxy Zoo Papers 30+ peer reviewed papers (incomplete list below) (over 550 citations – 100+ on description paper; h-index=18) Lintott et al. 2008, Morphologies derived from visual inspection of galaxies Cardamone et al. 2009, Green Peas: discovery of a class of compact from the SDSS extremely SF galaxies Banerji et al, 2010, Reproducing galaxy morphologies via machine learning Lintott et al. 2011, Data Release of Morphological Classifications for nearly Land et al. 2008, The large-scale spin statistics of spiral galaxies in the Sloan 900,000 galaxies Digital Sky Survey Willett et al. 2013, Detailed morphological classifications for 304,122 Slosar et al. 2009, Chiral correlation function of galaxy spins galaxies from the Sloan Digital Sky Survey Jimenez et al. 2010, A correlation between the coherence of galaxy spin chirality and SF efficiency Bamford et al. 2009, The dependence of morphology and colour on environment Lintott et al. 2009, `Hanny's Voorwerp', a quasar light echo? Skibba et al. 2009, Disentangling the environmental dependence of Keel et al. 2012, The Galaxy Zoo survey for giant AGN-ionized clouds: past morphology and colour and present black hole accretion events (Voorwerpjies) Schawinski et al. 2009, A sample of blue early-type galaxies at low redshift Masters et al. 2010, Passive red spirals Masters et al. 2011, Bars in Disk Galaxies Wong et al. 2011, Building the Low Mass end of the Red Sequence with Hoyle et al. 2011, Bar Lengths in Local Disk Galaxies Poststarburst Galaxies Skibba et al. 2012, The environmental dependence of bars and bulges in disc Tojeiro et al. 2013, The differenct star-formation histories of red and blue galaxies spiral and elliptical galaxies Masters et al. 2012, Atomic gas and the regulation of starformation in barred Schawinski et al. submitted, The Green Valley is a Red Herring disc galaxies Cheung et al. 2013, Observing secular evolution through bars Schawinski et al. 2010, The Fundamentally Different Co-Evolution of Melvin et al. submitted, An independent look at the bar fraction over the last Supermassive Black Holes and Their Early- and Late-Type Host Galaxies eight billion years from HST-COSMOS Simmons et al. 2013, Bulgeless galaxies with growing black holes Masters et al. 2010, Dust in spiral galaxies Darg et al. 2010, The properties of merging galaxies in the nearby Universe Kaviraj et al. 2012, Dust and Molecular gas in early-type galaxies with Darg et al. 2010, The fraction of merging galaxies in the SDSS and their prominent dust lanes morphologies Shabala et al. 2012, Dust lane early-type galaxies are tracers of recent, gas- Darg et al. 2011, Multi-Mergers and the Millennium Simulation rich minor mergers Casteels et al. 2013, Quantifying morphological indicators of galaxy Keel et al. 2013, A Catalogue of Overlapping Galaxy Pairs for Dust Studies interaction www.zooniverse.org/publications Karen Masters: Galaxy Zoo, 18th November 2013 blog.galaxyzoo.org/papers@KarenLMasters Galaxy Zoo Data Papers Lintott et al. 2008 Morphologies derived from visual inspection of galaxies from the SDSS Banerji et al, 2010 Reproducing galaxy morphologies via machine learning Lintott et al. 2011 Data Release of Morphological Classifications for nearly 900,000 galaxies Willett et al. 2013 Detailed morphological classifications for 304,122 galaxies from the Sloan Digital Sky Survey www.data.galaxyzoo.org Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Morphology Colour Bamford et al. 2009 The dependence of morphology and colour on environment Skibba et al. 2009 Disentangling the environmental dependence of morphology and colour Schawinski et al. 2009 A sample of blue early-type galaxies at low redshift Masters et al. 2010 Passive red spirals Wong et al. 2011 Building the Low Mass end of the Red Sequence with Poststarburst Galaxies Tojeiro et al. 2013 The different star-formation histories of red and blue spiral and elliptical galaxies Schawinski et al. submitted The Green Valley is a Red Herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early- and late-type galaxies th Karen Masters: Galaxy Zoo, 18 November 2013 @KarenLMasters Morphology Colour Median Colour and morphology prob. of are correlated, but not being spiral equivalent Colour = star formation history Morphology = dynamical history Median prob. of being elliptical Blue Red Classification “probability” from Galaxy Zoo Galaxy from “probability” Classification Skibba et al. 2009 (Colour, morphology and environment), or Bamford et al. 2009 Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Build up of red sequence is mostly due to spirals turning red… Disentangling the effects of mass and environment….. Red spiral fraction fraction spiral Red Distance to nearest cluster Contribution to build upof tobuild Contribution sequence red Local Density (Bamford et al. 2009) Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Red Spirals •" route for most evolution from blue -> red (Bundy et al. 2010 with redshift; Bamford et al. 2009 with environment) •" red because more passive than similar blue spirals (Masters et al. 2010, Tojeiro et al. 2013) •" but not totally passive (Masters et al. 2010, Cortese 2011) •" more common at high masses, intermediate environments, with large bulges and/or strong bars Masters et al. 2010 Karen Masters: Galaxy Zoo, 18th November 2013 @KarenLMasters Galaxy Zoo Bars Masters et al. 2011 Bars in (Local) Disc Galaxies Hoyle et al. 2011 Bar Lengths in Local Disc Galaxies Skibba et al. 2012 The environmental dependence of bars and bulges in disc galaxies Masters et al. 2012 Atomic gas and the regulation of starformation in barred disc galaxies Cheung et al. 2013 Willett et al. 2013 Observing secular evolution through bars (EFIGI: Baillard et al.
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