Showing 61 - 80 results of 389 for search '"Sloan Digital Sky Survey"', query time: 0.40s Refine Results
  1. 61

    Environmental dependence of stellar velocity dispersion in the Main galaxy sample of SDSS DR10 by Deng Xin-Fa

    Published 2014-11-01
    “…Two volume-limited samples with different redshift and luminosity ranges were constructed from the Main galaxy data of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10). Considering some drawbacks of volume-limited samples, the apparent magnitude-limited Main galaxy sample was also applied. …”
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    Article
  2. 62

    Satellite Galaxy Velocity Dispersions in the SDSS and Modified Gravity Models by John W. Moffat, Viktor T. Toth

    Published 2014-05-01
    “…The Sloan Digital Sky Survey (SDSS) provides data on several hundred thousand galaxies. …”
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    Article
  3. 63

    The rate of stellar tidal disruption flares from SDSS data by van Velzen S., Farrar G.R.

    Published 2012-12-01
    “…We have searched for flares due to the tidal disruption of stars by supermassive black holes in archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data. Our pipeline takes advantage of the excellent astrometry of SDSS to separate nuclear flares from supernovae. …”
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    Article
  4. 64

    The cosmic evolution of low-luminosity radio sources from the SDSS DR1 by Clewley, L, Jarvis, M

    Published 2004
    “…In this paper we constrain the evolution in the comoving space density for low-luminosity (typically FRI) radio sources as a function of cosmic epoch by matching deep radio surveys (WENSS, FIRST and NVSS) with the Sloan Digital Sky Survey (SDSS). This results in 1014 matched radio sources covering an effective area of 0.217 sr, 686 with L(325 MHz) < 10^25 W/Hz/sr, which is an order of magnitude larger than any previous study at these luminosities. …”
    Journal article
  5. 65

    UV Visibility of Moderate-Redshift Giant Elliptical Galaxies by Myung-Hyun Rhee, Young-Wook Lee, Yong-Ik Byun, Young-Jong Sohn

    Published 1998-06-01
    “…We also show that obtaining UV color index such as m_1550 - V from upcoming GALEX and SDSS (Sloan Digital Sky Survey) observations should be feasible.…”
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    Article
  6. 66

    Possible Relations between Brightest Central Galaxies and Their Host Galaxies Clusters and Groups by Samir R. M., Shaker A. A.

    Published 2021-01-01
    “…The r-band of the Sloan Digital Sky Survey (SDSS) for 17,924 brightest cluster galaxies (BCGs) in clusters and groups within 0.02 ⩽ z ⩽ 0.20 are used to study possible environmental relations affecting the nature of these galaxies. …”
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    Article
  7. 67

    Study on Star-Galaxy Image Generation Method Based on GAN

    Published 2019-04-01
    “…Taking the star-galaxy images in the Sloan digital sky survey (SDSS) as the training dataset, the improved method proposed in this paper and the original GAN were respectively used to generate two kinds of stars and galaxy images with different resolutions, and the comparison has been made to verify the effectiveness of the improved method.…”
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    Article
  8. 68

    Environmental Dependence of Different Colors for the Apparent Magnitude-Limited Main Galaxy Sample of the SDSS DR7 by Deng Xin-Fa, Luo Cheng-Hong, Xin Yong, Wu Ping

    Published 2013-06-01
    “…The apparent magnitude-limited Main galaxy sample of the Sloan Digital Sky Survey Data Release 7 is used to investigate the environmental dependence of u–r, u–g, g–r, r–i and i–z colors. …”
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    Article
  9. 69

    Morphological classification of galaxies and its relation to physical properties by Wijesinghe, D, Hopkins, A, Kelly, B, Welikala, N, Connolly, A

    Published 2010
    “…Here we present an analysis of a volume limited sample of 31703 galaxies from the fourth data release of the Sloan Digital Sky Survey. We use an image analysis method called Pixel-z to extract the underlying physical properties of the galaxies, which is then quantified using the concentration, asymmetry and clumpiness (CAS) parameters. …”
    Journal article
  10. 70

    Galaxy zoo builder: Four-component photometric decomposition of spiral galaxies guided by citizen science by Lingard, TK, Masters, KL, Krawczyk, C, Lintott, C, Kruk, S, Simmons, B, Simpson, R, Bamford, S, Nichol, RC, Baeten, E

    Published 2020
    “…We attempt to resolve this dilemma of "quantity or quality" by developing a novel framework, built inside the Zooniverse citizen-science platform, to enable the crowdsourcing of model creation for Sloan Digital Sky Survey galaxies. We have applied the method, including a final algorithmic optimization step, on a test sample of 198 galaxies, and examine the robustness of this new method. …”
    Journal article
  11. 71

    MoLUSC: A MOck Local Universe Survey Constructor by Sousbie, T, Courtois, H, Bryan, G, Devriendt, J

    Published 2006
    “…We describe various tests which have been conducted to validate the method, and demonstrate a first application to generate a mock Sloan Digital Sky Survey redshift survey.…”
    Journal article
  12. 72

    Spatial orientations of angular momentum vectors of galaxies in Supercluster S [173+014+0082] by Janak Ratna Malla, Walter Saurer, B Aryal

    Published 2021-01-01
    “… The spin vector orientation of 1302 SDSS (Sloan Digital Sky Survey) galaxies in Supercluster S[173+014+0082] having redshift 0.076 to 0.091 has been analyzed. …”
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    Article
  13. 73

    SDSS J090152.05+624342.6: A NEW “OVERLAPPING-TROUGH” FeLoBAL QUASAR AT Z ~ 2 by Jing Wang, Jing Wang, Dawei Xu, Dawei Xu, Jianyan Wei, Jianyan Wei

    Published 2017-11-01
    “…No strong variation of the broad absorption lines can be revealed through the two spectra taken by the Sloan Digital Sky Survey with a time interval of ~6 yr. Further optical and infrared spectroscopic study on this object is suggested.…”
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    Article
  14. 74

    The rapidly pulsating sdO star, SDSS J160043.6+074802.9 by Rodriguez-Lopez, C, Lynas-Gray, A, Kilkenny, D, MacDonald, J, Moya, A, Koen, C, Woudt, P, Wium, D, Oruru, B, Zietsman, E

    Published 2010
    “…A spectroscopic analysis of Sloan Digital Sky Survey (SDSS) J160043.6+074802.9, a binary system containing a pulsating subdwarf-O (sdO) star with a late-type companion, yields Teff = 70 000 ± 5000 K and log g = 5.25 ± 0.30, together with a most likely type of K3 V for the secondary star. …”
    Journal article
  15. 75

    A structure in the early Universe at z similar to 1.3 that exceeds the homogeneity scale of the R-W concordance cosmology by Clowes, R, Harris, K, Raghunathan, S, Campusano, L, Soechting, I, Graham, M

    Published 2013
    “…A large quasar group (LQG) of particularly large size and high membership has been identified in theDR7QSO catalogue of the Sloan Digital Sky Survey. It has characteristic size (volume1/3) ~ 500 Mpc (proper size, present epoch), longest dimension ~1240 Mpc, membership of 73 quasars and mean redshift -z = 1.27. …”
    Journal article
  16. 76

    Galaxy Zoo: A Catalog of Overlapping Galaxy Pairs for Dust Studies by Keel, W, Manning, A, Holwerda, B, Mezzoprete, M, Lintott, C, Schawinski, K, Gay, P, Masters, K

    Published 2012
    “…We present a catalog of 1990 such galaxy pairs selected from the Sloan Digital Sky Survey (SDSS) by volunteers of the Galaxy Zoo project. …”
    Journal article
  17. 77

    Two close large quasar groups of size similar to 350 Mpc at z similar to 1.2 by Clowes, R, Campusano, L, Graham, M, Soechting, I

    Published 2012
    “…The Clowes and Campusano large quasar group (LQG) athas been re-examined using the quasar data from the DR7QSO catalogue of the Sloan Digital Sky Survey. In the 1991 discovery, the LQG impinged on the northern, southern and eastern limits of the survey. …”
    Journal article
  18. 78

    Massive elliptical galaxies : From cores to haloes by Lintott, C, Ferreras, I, Lahav, O

    Published 2005
    “…Using a sample of over 2000 galaxies from the Sloan Digital Sky Survey, by comparing the dynamical mass and stellar mass (estimated from colours) we find that ellipticals have `cores' which are baryon-dominated within their half-light radius. …”
    Journal article
  19. 79

    Spectral Properties of AGN with Very Weak [O III] Lines by Kovacevic, J.

    Published 2011-06-01
    “…The spectra are obtainedfrom Sloan Digital Sky Survey (SDSS) Database. It is found that the objectswith the weak or absent [O~III] $lambdalambda$4959, 5007 AA linesgenerally have the high continuum luminosities (log($lambda$L$_{5100}$) $>$45), that they are very rare at smaller redshifts ($z <$ 0.3) and that theyusually have strong starburst influence. …”
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  20. 80

    The quasars’ redshift estimation method based on piecewise Gaussian fitting by Yanrui Su, Li Zhang, Bin Jiang, Jiaqi Liu, Fabao Yan

    Published 2019-05-01
    “…The effectiveness and accuracy of this method have been verified by experiments based on the Sloan Digital Sky Survey data.…”
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