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| Publications | Data products | DR4 Data release | DR2 data release | Figures |
By providing homogeneous photometric and spectroscopic data of high quality for very large and objectively selected samples of galaxies, the Sloan Digital Sky Survey allows statistical studies of the physical properties of galaxies and AGN to be carried out at an entirely unprecedented level of precision and detail.
Here we publicly release catalogues of derived physical properties for 567486 spectra of approximately 520500 individual galaxies (after accounting for repeat observations), including 88178 narrow-line AGN. The majority of these are from complete samples with well understood selection criteria drawn from the normal galaxy spectroscopic sample in the fourth SDSS public data release (DR4). We do however caution that the DR4 also include further special plates which have different properties and any researcher wishing to do statistical studies must be aware of this. Files are included that provide the necessary information. We list properties obtained from the SDSS spectroscopy and photometry using modelling techniques presented in papers already published by our group.
These properties include: stellar masses; stellar mass-to-light ratios; effective stellar attenuation by dust; indicators of recent major starbursts; current total and specific star-formation rates, both for the regions with spectroscopy and for the galaxies as a whole; gas-phase metallicities; AGN classifications based on the standard emission line ratio diagnostic diagrams; AGN luminosities in the [O III]5007 emission line (a proxy for the accretion rate).
We also have kept our previous DR2 dataset which provides some quantities which have not yet been calculated for the DR4, such as environment density estimates, stellar metallicities and stellar ages, as well as matches to radio, and UV-bright samples.
We also list our own measurements of absorption line indices and emission line fluxes and a number of other parameters calculated by the SDSS, in addtion providing matches to the HST observation archive.
The data presented here were produced by a collaboration of researchers (currently or formerly) from the MPA and the JHU. The team is made up of Stephane Charlot, Guinevere Kauffmann and Simon White (MPA), Tim Heckman (JHU), Christy Tremonti (University of Arizona - formerly JHU) and Jarle Brinchmann ( Centro de Astrofísica da Universidade do Porto - formerly MPA).
Clicking on the titles below will take you to the appropriate ADS page for each paper.
Kauffmann, G. et al 2003a, MNRAS, 341, 33, "Stellar masses and star formation histories for 10^5 galaxies from the Sloan Digital Sky Survey"
Kauffmann, G. et al 2003b, MNRAS, 341, 54, "The dependence of star formation history and internal structure on stellar mass for 10^5 low-redshift galaxies"
Kauffmann G., et al., 2003c, MNRAS, 346, 1055 "The host galaxies of active galactic nuclei"
Brinchmann, J. et al 2004, MNRAS, 351, 1151, "The physical properties of star-forming galaxies in the low-redshift Universe "
Heckman, T. et al 2004, ApJ, 613, 109 "Present-Day Growth of Black Holes and Bulges: the SDSS Perspective"
Kauffmann, G. et al 2004, MNRAS, 353, 713 "The Environmental Dependence of the Relations between Stellar Mass, Structure, Star Formation and Nuclear Activity in Galaxies"
Tremonti, C. A., et al, 2004, ApJ, 613, 898 "The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS"
Heckman, T., et al, 2005, ApJL, 619, L35 "The Properties of Ultraviolet-luminous Galaxies at the Current Epoch "
Best, P., et al 2005, MNRAS, 362, 9 "A sample of radio-loud AGN in the Sloan Digital Sky Survey "
Best, P., et al 2005, MNRAS, 362, 25 "The host galaxies of radio-loud AGN: mass dependencies, gas cooling and AGN feedback "
Gallazzi, A., et al 2005, MNRAS, 362, 41 "The ages and metallicities of galaxies in the local universe".
Gallazzi, A., et al 2006, MNRAS, 370, 1106 "Ages and metallicities of early-type galaxies in the Sloan Digital Sky Survey: new insight into the physical origin of the colour-magnitude and the Mg2-σV relations", Gallazzi et al (2006).
News:
08/11/05: A table containing the specObjID for the objects was published
09/10/05: A problem with the matching of the photometry for duplicate objects was discovered and has been rectified in the file linked to here. Note however that this also affects total SFRs and the alternative stellar masses.
14/10/05 - The pages were made
publicly available..
22/10/05 - The AGN catalogue was updated to rectify a
problem with the RA & DEC values.
04/04/07: Added stellar metallicities, ages and
stellar mass estimates from Gallazzi et al. for DR4
General notice: Please note that our line fluxes where given, are all corrected for foreground (galactic) reddening using the O'Donnell, J.E., 1994, ApJ, 422, 158. If you have any questions about this please feel free to contact us.
If you are interested in our DR2 data, either because that is what you have been using or because you need the stellar metallicities and ages and/or environmental parameters, then please follow this link.
The DR4 catalogues differ from our previous release in that we have provided the full data tables we have. This includes a number of quantities that have been taken straight from the SDSS tsObj files, and a large number of quantities we have measured from the spectra using the pipeline described in Tremonti et al (2004). The total number of quantities measured from the spectra is substantial; they are described further on the raw data page.
It is also important to note that we have used all spectroscopic plates included in the DR4 in our analysis. This constitutes a superset of the DR4 galaxy targets which fulfill the galaxy sample selection criteria. This has the consequence that most catalogues contain galaxies that fall outside the galaxy sample selection criteria. We therefore recommend that you stick to the subset of galaxies included in the stellar mass catalogue which has been further constrained to satisfy the selection criteria for the main galaxy sample as well as some weak constraints on the D4000 and Hdelta values measured as detailed in Kauffmann et al (2003a)
To obtain further SDSS information and SDSS data, please refer to the official webside and the DR4 website respectively.
Please note that we do not guarantee that the quantities in the following tables will be updated to be consistent with new and improved reductions of the SDSS data - if this is important we encourage the researcher to check against the SDSS data-release site.
We here provide PS and PNG versions of the figures in all our accepted papers. Each link below takes you to a page with all the figures for that paper. If you use these diagrams, please reference the relevant paper appropriately.
The Sloan Digital Sky Survey (SDSS) is a joint project of The University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, the Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, University of Pittsburgh, Princeton University, the United States Naval Observatory, and the University of Washington. Funding for the project has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Aeronautics and Space Administration, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. www.sdss.org is a winner of the Griffith Observatory's Star Award