Search Results - "Galaxy Zoo"

Galaxy Zoo: constraining the origin of spiral arms by Hart, Ross E., Bamford, Steven P., Keel, William C., Kruk, Sandor J., Masters, Karen L., Simmons, Brooke D., Smethurst, Rebecca J.

“…Using these models, we test predictions of swing amplification theory with respect to directly measured spiral arm numbers from Galaxy Zoo 2. We find that neither a universal cored or cuspy inner dark matter profile can correctly predict observed numbers of arms in galaxies. …”
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Galaxy Zoo: Mergers – Dynamical models of interacting galaxies by Holincheck, Anthony J., Wallin, John F., Borne, Kirk, Fortson, Lucy, Lintott, Chris, Smith, Arfon M., Bamford, Steven, Keel, William C., Parrish, Michael

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Galaxy Zoo: the interplay of quenching mechanisms in the group environment by Smethurst, Rebecca J., Lintott, C.J., Bamford, S.P., Hart, R.E., Kruk, S.J., Masters, K.L., Nichol, R.C., Simmons, B.D.

“…Here, we investigate the detailed morphological structures and star formation histories of a sample of SDSS group galaxies with both classifications from Galaxy Zoo 2 and near ultra-violet (NUV) detections in GALEX. …”
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Galaxy Zoo: star formation versus spiral arm number by Hart, Ross E., Bamford, Steven P., Casteels, Kevin R.V., Kruk, Sandor J., Lintott, Chris J., Masters, Karen L.

“…We investigate how these different arm types are related to a galaxy's star formation and gas properties by making use of visual spiral arm number measurements from Galaxy Zoo 2. We combine ultraviolet and mid-infrared (MIR) photometry from GALEX and WISE to measure the rates and relative fractions of obscured and unobscured star formation in a sample of low-redshift SDSS spirals. …”
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Galaxy Zoo: finding offset discs and bars in SDSS galaxies by Kruk, Sandor J., Lintott, Chris J., Simmons, Brooke D., Bamford, Steven P., Cardamone, Carolin N., Fortson, Lucy, Hart, Ross E., Häußler, Boris, Masters, Karen L., Nichol, Robert C., Schawinski, Kevin, Smethurst, Rebecca J.

“…We use multiwavelength Sloan Digital Sky Survey (SDSS) images and Galaxy Zoo morphologies to identify a sample of ∼270 late-type galaxies with an off-centre bar. …”
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Galaxy Zoo: morphological classification of galaxy images from the Illustris simulation by Dickinson, Hugh, Fortson, Lucy, Lintott, Chris, Scarlata, Claudia, Willett, Kyle, Bamford, Steven, Beck, Melanie, Cardamone, Carolin, Galloway, Melanie, Simmons, Brooke, Keel, William, Kruk, Sandor, Masters, Karen, Vogelsberger, Mark, Torrey, Paul, Snyder, Gregory F.

“…This paper tests the degree to which Illustris achieves this goal across a diverse population of galaxies using visual morphologies derived from Galaxy Zoo citizen scientists. Morphological classifications provided by these volunteers for simulated galaxies are compared with similar data for a compatible sample of images drawn from the Sloan Digital Sky Survey (SDSS) Legacy Survey. …”
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Radio Galaxy Zoo: A Search for hybrid morphology radio galaxies by Kapiñska, A., Terentev, I., Terentev, W., Shabala, S., Shabala, A., Rudnick, L., Storer, L., Banfield, J., Willett, K., Willett, F., Willett, C., Willett, A., Middelberg, E., Norris, R., Norris, K., Seymour, Nick, Simmons, B.

“…To enhance the statistical analysis of HyMoRS, we embarked on a largescale search of these sources within the international citizen science project, Radio Galaxy Zoo (RGZ). Here, we present 25 new candidate hybrid morphology radio galaxies. …”
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Galaxy Zoo: morphological classifications for 120 000 galaxies in HST legacy imaging by Willett, Kyle W., Galloway, Melanie A., Bamford, Steven P., Lintott, Chris J., Masters, Karen L., Scarlata, Claudia, Simmons, B.D., Beck, Melanie, Cardamone, Carolin N., Cheung, Edmond, Edmondson, Edward M., Fortson, Lucy F., Griffith, Roger L., Häußler, Boris, Han, Anna, Hart, Ross, Melvin, Thomas, Parrish, Michael, Schawinski, Kevin, Smethurst, Rebecca J., Smith, Arfon M.

“…We present the data release paper for the Galaxy Zoo: Hubble (GZH) project. This is the third phase in a large effort to measure reliable, detailed morphologies of galaxies by using crowdsourced visual classifications of colour-composite images. …”
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Radio Galaxy Zoo: CLARAN - A deep learning classifier for radio morphologies by Wu, C., Wong, O., Rudnick, L., Shabala, S., Alger, M., Banfield, J., Ong, C., White, Sarah, Garon, A., Norris, R., Andernach, H., Tate, J., Lukic, V., Tang, H., Schawinski, K., Diakogiannis, F.

“…Specifically, we train and test CLARAN on the FIRST and WISE (Wide-field Infrared Survey Explorer) images from the Radio Galaxy Zoo Data Release 1 catalogue. CLARAN provides end users with automated identification of radio source morphology classifications from a simple input of a radio image and a counterpart infrared image of the same region. …”
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Galaxy Zoo: quantitative visual morphological classifications for 48 000 galaxies from CANDELS by Simmons, B.D., Lintott, Chris, Willett, Kyle W., Masters, Karen L., Kartaltepe, Jeyhan S., Häußler, Boris, Kaviraj, Sugata, Krawczyk, Coleman, Kruk, S.J., McIntosh, Daniel H., Smethurst, Rebecca J., Nichol, Robert C., Scarlata, Claudia, Schawinski, Kevin, Conselice, Christopher J., Almaini, Omar, Ferguson, Henry C., Fortson, Lucy, Hartley, William, Kocevski, Dale, Koekemoer, Anton M., Mortlock, Alice, Newman, Jeffrey A., Bamford, Steven P., Grogin, N.A., Lucas, Ray A., Hathi, Nimish P., McGrath, Elizabeth, Peth, Michael, Pforr, Janine, Rizer, Zachary, Wuyts, Stijn, Barro, Guillermo, Bell, Eric F., Castellano, Marco, Dahlen, Tomas, Dekel, Avishai, Ownsworth, Jamie, Faber, Sandra M., Finkelstein, Steven L., Fontana, Adriano, Galametz, Audrey, Grützbauch, Ruth, Koo, David, Lotz, Jennifer, Mobasher, Bahram, Mozena, Mark, Salvato, Mara, Wiklind, Tommy

“…After analysing the effect of varying image depth on reported classifications, we also provide depth-corrected classifications which both preserve the information in the deepest observations and also enable the use of classifications at comparable depths across the full survey. Comparing the Galaxy Zoo classifications to previous classifications of the same galaxies shows very good agreement; for some applications, the high number of independent classifications provided by Galaxy Zoo provides an advantage in selecting galaxies with a particular morphological profile, while in others the combination of Galaxy Zoo with other classifications is a more promising approach than using any one method alone. …”
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Galaxy Zoo: secular evolution of barred galaxies from structural decomposition of multiband images by Kruk, Sandor J., Lintott, Chris J., Bamford, Steven P., Masters, Karen L., Simmons, Brooke D., Häußler, Boris, Cardamone, Carolin N., Hart, Ross E., Kelvin, Lee, Schawinski, Kevin, Smethurst, Rebecca J., Vika, Marina

“…This sample of ∼3500 nearby (z<0.06) galaxies with strong bars selected from the Galaxy Zoo citizen science project is the largest sample of barred galaxies to be studied using photometric decompositions that include a bar component. …”
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Radio Galaxy Zoo: Host galaxies and radio morphologies derived from visual inspection by Banfield, J., Wong, O., Willett, K., Norris, R., Rudnick, L., Shabala, S., Simmons, B., Snyder, C., Garon, A., Seymour, Nick, Middelberg, E., Andernach, H., Lintott, C., Jacob, K., Kapinska, A., Mao, M., Masters, K., Jarvis, M., Schawinski, K., Paget, E., Simpson, R., Klöckner, H., Bamford, S., Burchell, T., Chow, K., Cotter, G., Fortson, L., Heywood, I., Jones, T., Kaviraj, S., López-Sánchez, R., Maksym, W., Polsterer, K., Borden, K., Hollow, R., Whyte, L.

“…We present results from the first 12 months of operation of Radio Galaxy Zoo, which upon completion will enable visual inspection of over 170 000 radio sources to determine the host galaxy of the radio emission and the radio morphology. …”
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Galaxy Zoo: evidence for rapid, recent quenching within a population of AGN host galaxies by Smethurst, Rebecca J., Lintott, C.J., Simmons, B.D., Schawinski, K., Bamford, S.P., Cardamone, C.N., Kruk, S.J., Masters, K.L., Urry, C.M., Willett, K.W., Wong, O.I.

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Galaxy Zoo: comparing the demographics of spiral arm number and a new method for correcting redshift bias by Hart, Ross E., Bamford, Steven P., Willett, Kyle W., Masters, Karen L., Cardamone, Carolin, Lintott, Chris J., Mackay, Robert J., Nichol, Robert C., Rosslowe, Christopher K., Simmons, Brooke D., Smethurst, Rebecca J.

“…In this paper, we develop a new debiasing method to reliably correct for redshift-dependent bias in Galaxy Zoo 2, and release the new set of debiased classifications. …”
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Galaxy Zoo and SPARCFIRE: constraints on spiral arm formation mechanisms from spiral arm number and pitch angles by Hart, Ross E., Bamford, Steven P., Hayes, Wayne B., Cardamone, Carolin N., Keel, William C., Kruk, Sandor J., Lintott, Chris J., Masters, Karen L., Simmons, Brooke D., Smethurst, Rebecca J.

“…In this paper, we study the morphological properties of spiral galaxies, including measurements of spiral arm number and pitch angle. Using Galaxy Zoo 2, a stellar mass-complete sample of 6222 SDSS spiral galaxies is selected. …”
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Radio Galaxy Zoo: Discovery of a poor cluster through a giant wide-angle tail radio galaxy by Banfield, J., Andernach, H., Kapinska, A., Rudnick, L., Hardcastle, M., Cotter, G., Vaughan, S., Jones, T., Heywood, I., Wing, J., Wong, O., Matorny, T., Terentev, I., López-Sánchez, R., Norris, R., Seymour, Nick, Shabala, S., Willett, K.

“…We have discovered a previously unreported poor cluster of galaxies (RGZ-CL J0823.2+0333) through an unusual giant wide-angle tail radio galaxy found in the Radio Galaxy Zoo project. We obtained a spectroscopic redshift of z = 0.0897 for the E0-type host galaxy, 2MASX J08231289+0333016, leading to Mr = −22.6 and a 1.4 GHz radio luminosity density of L1.4 = 5.5 × 1024 W Hz−1. …”
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Meneroka keberkesanan diskriminan fisher dalam pengelasan morfologi galaksi by Sazatul Nadhilah Zakaria, Santtosh Muniyandy, Soo, John Y.H.

“…Dengan menggunakan data dari Tinjauan Langit Digital Sloan (SDSS), kami menguji lima transformasi pemboleh ubah pra-pemprosesan: penormalan, nyahkorelasi, analisis komponen utama (PCA), penyeragaman dan Gaussanisasi, serta mengelaskan bentuk bonjol pusat galaksi kepada bentuk bulat atau tiada bonjol, berdasarkan Pokok Keputusan Galaxy Zoo. Apabila dibandingkan dengan label daripada Galaxy Zoo 2 (GZ2), diskriminan Fisher dengan transformasi penyeragaman memperoleh skor kejituan tertinggi iaitu 0.9310, melebihi ANN, BDT dan kNN masing-masing setinggi 1.93%, 0.42% dan 3.08%.…”
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The properties and origins of spiral structure across the galaxy population by Hart, Ross Edward

“…We utilise data from Galaxy Zoo, which provides visual classifications for a flux-limited sample of Sloan Digital Sky Survey (SDSS) galaxies, complete for m_r <17.0. …”
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A first approach for handling uncertainty in citizen science by Jiménez, Manuel, Triguero, Isaac, John, Robert

“…We test our method using the Galaxy Zoo, a project which aims for the labelling of a huge dataset of galaxy images. …”
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Star formation rates for elliptical galaxies derived from the WISE 12- and 22- µm emission by Nur Hidayah Mohd Ali, Zamri Zainal Abidin, Hwang, Chorng-Yuan

“…The elliptical galaxies were selected from the Sloan Digital Sky Survey (SDSS) MPA-JHU catalog and morphology classified by Galaxy Zoo catalog. We used the 3.4-µm emission (W1) of WISE to represent the stellar mass of the galaxies and the 12- and 22-µm emission (W3 and W4) of WISE to represent the star formation activity of the galaxies. …”
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