Research interests

Physical properties of galaxy populations

I apply various statistical and machine learning methods to derive the physical properties of galaxies from spectra and broadband photometry.

Related publications:

  • Beck, Róbert; Dobos, László; Budavári, Tamás; Szalay, Alexander S.; Csabai, István
    Photometric redshifts for the SDSS Data Release 12
    2016 Monthly Notices of the Royal Astronomical Society, Volume 460, Issue 2, p.1371-1381
    ADS | arXiv
  • Beck, Róbert; Dobos, László; Yip, Ching-Wa; Szalay, Alexander S.; Csabai, István
    Quantifying correlations between galaxy emission lines and stellar continua
    2016 Monthly Notices of the Royal Astronomical Society, Volume 457, Issue 1, p.362-374
    ADS | arXiv
  • Yip, Ching-Wa; Mahoney, Michael W.; Szalay, Alexander S.; Csabai, István; Budavári, Tamás; Wyse, Rosemary F. G.; Dobos, Laszlo
    Objective Identification of Informative Wavelength Regions in Galaxy Spectra
    2014 The Astronomical Journal, Volume 147, Issue 5, article id. 110, 15 pp.
    ADS | arXiv
  • Varga, J.; Csabai, I.; Dobos, L.
    Refined position angle measurements for galaxies of the SDSS Stripe 82 co-added dataset
    2013 Astronomische Nachrichten, Vol.334, Issue 9, p.1016
    ADS | arXiv
  • Varga, József; Csabai, István.; Dobos, László
    Revealing a strongly reddened, faint active galactic nucleus population by stacking deep co-added images
    2012 Monthly Notices of the Royal Astronomical Society, Volume 426, Issue 2, pp. 833-850.
    ADS | arXiv
  • Dobos, László; Csabai, István.; Yip, Ching-Wa; Budavári, Tamás.; Wild, Vivienne; Szalay, Alexander S.
    A high-resolution atlas of composite Sloan Digital Sky Survey galaxy spectra
    2012 Monthly Notices of the Royal Astronomical Society, Volume 420, Issue 2, pp. 1217-1238.
    ADS | arXiv
  • Dobos, László; Csabai, István
    Order statistics of the early-type galaxy luminosity function
    2011 Monthly Notices of the Royal Astronomical Society, Volume 414, Issue 3, pp. 1862-1874.
    ADS | arXiv
  • Yip, Ching-Wa; Szalay, Alex S.; Wyse, Rosemary F. G.; Dobos, László; Budavári, Tamás; Csabai, Istvan
    Extinction in Star-forming Disk Galaxies from Inclination-dependent Composite Spectra
    2010 The Astrophysical Journal, Volume 709, Issue 2, pp. 780-790
    ADS | arXiv
  • Yip, C. W.; Connolly, A. J.; Vanden Berk, D. E.; Scranton, R.; Krughoff, S.; Szalay, A. S.; Dobos, L.; Tremonti, C.; Taghizadeh-Popp, M.; Budavári, T.; Csabai, I.; Wyse, R. F. G.; Ivezić, Ž.
    Probing Spectroscopic Variability of Galaxies and Narrow-Line Active Galactic Nuclei in the Sloan Digital Sky Survey
    2009 The Astronomical Journal, Volume 137, Issue 6, pp. 5120-5133
    ADS | arXiv
  • Budavári, Tamás; Wild, Vivienne; Szalay, Alexander S.; Dobos, László; Yip, Ching-Wa
    Reliable eigenspectra for new generation surveys
    2009 Monthly Notices of the Royal Astronomical Society, Volume 394, Issue 3, pp. 1496-1502.
    ADS | arXiv

Machine learning methods in astronomy

Related publications:

  • Beck, Róbert; Dobos, László; Budavári, Tamás; Szalay, Alexander S.; Csabai, István
    Photometric redshifts for the SDSS Data Release 12
    2016 Monthly Notices of the Royal Astronomical Society, Volume 460, Issue 2, p.1371-1381
    ADS | arXiv
  • Banyai, E.; Plachy, E.; Molnar, L.; Dobos, L.; Szabo, R.
    Constraining RRc candidates using SDSS colours
    2016 Communications from the Konkoly Observatory, Vol. 105, p. 195-196
    ADS | arXiv
  • Beck, Róbert; Dobos, László; Yip, Ching-Wa; Szalay, Alexander S.; Csabai, István
    Quantifying correlations between galaxy emission lines and stellar continua
    2016 Monthly Notices of the Royal Astronomical Society, Volume 457, Issue 1, p.362-374
    ADS | arXiv
  • Kerekes, Gy.; Csabai, I.; Dobos, L.; Trencséni, M.
    Photo-Met: A non-parametric method for estimating stellar metallicity from photometric observations
    2013 Astronomische Nachrichten, Vol.334, Issue 9, p.1012
    ADS | arXiv

Scientific databases

  • Distributed and scalable databases and query execution
  • Spatial techniques for SQL databases
  • Virtual Observatory
  • noSQL solutions for distributed in-memory databases

Related publications:

  • Dobos, László; Varga-Verebélyi, Erika; Verdugo, Eva; Teyssier, David; Exter, Katrina; Valtchanov, Ivan; Budavári, Tamás; Kiss, Csaba
    The Footprint Database and Web Services of the Herschel Space Observatory
    2016 Experimental Astronomy, Volume 42, Issue 2, pp.139-164
    ADS | arXiv | ExA
  • János Szüle, László Dobos, István Csabai, Gábor Vattay
    Network Measurement Virtual Observatory: An Integrated Database Environment for Internet Research and Experimentation
    Testbeds and Research Infrastructure: Development of Networks and Communities: 9th International ICST Conference, TridentCom 2014, Guangzhou, China, May 5-7, 2014, Revised Selected Papers, 137, 65
    Google
  • László Dobos, István Csabai, János M Szalai-Gindl, Tamás Budavári, Alexander S Szalay
    Point cloud databases
    2014 Proceedings of the 26th International Conference on Scientific and Statistical Database Management, 22
    ACM
  • Dániel Kondor, László Dobos, István Csabai, András Bodor, Gábor Vattay, Tamás Budavári, Alexander S Szalay
    Efficient classification of billions of points into complex geographic regions using hierarchical triangular mesh
    2014 Proceedings of the 26th International Conference on Scientific and Statistical Database Management, 4
    arXiv | ACM
  • Tamás Sebők, Zsófia Kallus, Sándor Laki, Péter Mátray, József Stéger, János Szüle, László Dobos, István Csabai, Gábor Vattay
    Network Measurement Virtual Observatory: An Integrated Database Environment for Internet Research and Experimentation
    2014 International Conference on Testbeds and Research Infrastructures
    Volume 137 of the series Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering pp 65-74
    journal
  • László Dobos, Janos Szule, Tamás Bodnár, Tamás Hanyecz, Tamás Sebok, Dániel Kondor, Zsófia Kallus, József Stéger, István Csabai, Gábor Vattay
    A multi-terabyte relational database for geo-tagged social network data
    2013 IEEE 4th International Conference on Cognitive Infocommunications (CogInfoCom) 289-294
    arXiv | IEEE
  • Tamás Budavári, László Dobos & Alexander S. Szalay
    SkyQuery: Federating astronomy archives
    2013 Computing in Science & Engineering, 15, 3, 12
    Proceedings of the 25th International Conference on Scientific and Statistical Database Management Article No. 30
    IEEE
  • László Dobos, Alexander S. Szalay, Tamás Budavári, István Csabai & Nolan Li
    Graywulf: A platform for federated scientific databases and services
    Scientific and Statistical Database Management 2013
    Proceedings of the 25th International Conference on Scientific and Statistical Database Management Article No. 30
    ADS | arXiv | ACM
  • László Dobos, Tamás Budavári, Nolan Li, Alexander S. Szalay & István Csabai
    SkyQuery: An Implementation of a Parallel Probabilistic Join Engine for Cross-Identification of Multiple Astronomical Databases
    Scientific and Statistical Database Management 2012
    Volume 7338 of the series Lecture Notes in Computer Science pp 159-167
    ADS | arXiv | LNCS
  • László Dobos, Alexander Szalay, José Blakeley, Tamás Budavári, István Csabai, Dragan Tomic, Milos Milovanovic, Marko Tintor, Andrija Jovanovic
    Array requirements for scientific applications and an implementation for microsoft sql server
    2011 Proceedings of the EDBT/ICDT 2011 Workshop on Array Databases, 13-19
    ADS | arXiv | ACM
  • Csabai, I.; Dobos, L.; Trencséni, M.; Herczegh, G.; Józsa, P.; Purger, N.; Budavári, T.; Szalay, A. S.
    Multidimensional indexing tools for the virtual observatory
    2007 Astronomische Nachrichten, Vol.328, Issue 8, p.852
    ADS | AN

Cosmology

Social networks

Related publications:

  • Eszter Bokányi, Dániel Kondor, László Dobos, Tamás Sebők, József Stéger, István Csabai, Gábor Vattay
    Race, religion and the city: twitter word frequency patterns reveal dominant demographic dimensions in the United States
    2016 Palgrave Communications, 2, 16010
    arXiv | journal
  • János Szüle, Dániel Kondor, László Dobos, István Csabai, Gábor Vattay
    Lost in the City: Revisiting Milgram's Experiment in the Age of Social Networks
    2014 PloS ONE, 9, 11, e111973
    PLoS |
  • Dániel Kondor, László Dobos, István Csabai, András Bodor, Gábor Vattay, Tamás Budavári, Alexander S Szalay
    Efficient classification of billions of points into complex geographic regions using hierarchical triangular mesh
    2014 Proceedings of the 26th International Conference on Scientific and Statistical Database Management, 4
    arXiv | ACM
  • László Dobos, Janos Szule, Tamás Bodnár, Tamás Hanyecz, Tamás Sebok, Dániel Kondor, Zsófia Kallus, József Stéger, István Csabai, Gábor Vattay
    A multi-terabyte relational database for geo-tagged social network data
    2013 IEEE 4th International Conference on Cognitive Infocommunications (CogInfoCom) 289-294
    arXiv | IEEE
  • Dániel Kondor, István Csabai, László Dobos, Janos Szule, Norbert Barankai, Tamás Hanyecz, Tamas Sebok, Zsófia Kallus, Gábor Vattay
    Using Robust PCA to estimate regional characteristics of language use from geo-tagged Twitter messages
    2013 IEEE 4th International Conference on Cognitive Infocommunications (CogInfoCom) 393-398
    arXiv | IEEE
  • Zsófia Kallus, Norbert Barankai, Dániel Kondor, Laszlo Dobos, Tamás Hanyecz, Janos Szule, József Stéger, Tamas Sebok, Gábor Vattay, István Csabai
    Regional properties of global communication as reflected in aggregated Twitter data
    2013 IEEE 4th International Conference on Cognitive Infocommunications (CogInfoCom) 429-434
    arXiv | IEEE