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The matter distribution in the local Universe as derived from galaxy groups in SDSS DR12 and 2MRS

Saulder, Christoph ; van Kampen, Eelco ; Chilingarian, Igor V. ; Mieske, Steffen ; Zeilinger, Werner W.

Astronomy and astrophysics (Berlin), 2016-12, Vol.596, p.A14 [Periódico revisado por pares]

EDP Sciences

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  • Título:
    The matter distribution in the local Universe as derived from galaxy groups in SDSS DR12 and 2MRS
  • Autor: Saulder, Christoph ; van Kampen, Eelco ; Chilingarian, Igor V. ; Mieske, Steffen ; Zeilinger, Werner W.
  • Assuntos: Algorithms ; Calibration ; Computer simulation ; Estimates ; Galaxies ; galaxies: clusters: general ; galaxies: distances and redshifts ; galaxies: statistics ; large-scale structure of Universe ; Local group (astronomy) ; Planes
  • É parte de: Astronomy and astrophysics (Berlin), 2016-12, Vol.596, p.A14
  • Notas: bibcode:2016A%26A...596A..14S
    The full catalogues (Tables A.1 to A.8) are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/596/A14
    publisher-ID:aa26711-15
    ark:/67375/80W-PT136346-X
    istex:335C8346F429C033BC7DA2D8F1319CB40A06E355
    dkey:10.1051/0004-6361/201526711
    e-mail: christoph.saulder@equinoxomega.net
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Context. Friends-of-friends algorithms are a common tool to detect galaxy groups and clusters in large survey data. In order to be as precise as possible, they have to be carefully calibrated using mock catalogues. Aims. We create an accurate and robust description of the matter distribution in the local Universe using the most up-to-date available data. This will provide the input for a specific cosmological test planned as follow-up to this work, and will be useful for general extragalactic and cosmological research. Methods. We created a set of galaxy group catalogues based on the 2MRS and SDSS DR12 galaxy samples using a friends-of-friends based group finder algorithm. The algorithm was carefully calibrated and optimised on a new set of wide-angle mock catalogues from the Millennium simulation, in order to provide accurate total mass estimates of the galaxy groups taking into account the relevant observational biases in 2MRS and SDSS. Results. We provide four different catalogues: (i) a 2MRS based group catalogue; (ii) an SDSS DR12 based group catalogue reaching out to a redshift z = 0.11 with stellar mass estimates for 70% of the galaxies; (iii) a catalogue providing additional fundamental plane distances for all groups of the SDSS catalogue that host elliptical galaxies; (iv) a catalogue of the mass distribution in the local Universe based on a combination of our 2MRS and SDSS catalogues. Conclusions. While motivated by a specific cosmological test, three of the four catalogues that we produced are well suited to act as reference databases for a variety of extragalactic and cosmological science cases. Our catalogue of fundamental plane distances for SDSS groups provides further added value to this paper.
  • Editor: EDP Sciences
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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