NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-25 T10:04:03 PDT
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For refcode 1997A&AS..124..109P:
Retrieve 22 NED objects in this reference.
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
1997A&AS..124..109P Extragalactic database. VII. Reduction of astrophysical parameters. Paturel G., Andernach H., Bottinelli L., Di Nella H., Durand N., Garnier R., Gouguenheim L., Lanoix P., Marthinet M.C., Petit C., Rousseau J., Theureau G., Vauglin I. Received September 10; accepted November 5, 1996 Abstract. The Lyon-Meudon Extragalactic database (LEDA) gives a free access to the main astrophysical parameters for more than 100 000 galaxies. The most common names are compiled allowing users to recover quickly any galaxy. All these measured astrophysical parameters are first reduced to a common system according to well defined reduction formulae leading to mean homogeneized parameters. Further, these parameters are also transformed into corrected parameters from widely accepted models. For instance, raw 21-cm line widths are transformed into mean standard widths after correction for instrumental effect and then into maximum velocity rotation properly corrected for inclination and non-circular velocity. This paper presents the reduction formulae for each parameter: coordinates, morphological type and luminosity class, diameter and axis ratio, apparent magnitude (UBV, IR, HI) and colors, maximum velocity rotation and central velocity dispersion, radial velocity, mean surface brightness, distance modulus and absolute magnitude, and group membership. For each of these parameters intermediate quantities are given: galactic extinction, inclination, K-correction etc.. All these parameters are available from direct connexion to LEDA and distributed on a standard CD-ROM (PGC-ROM 1996) by the Observatoire de Lyon via the CNRS. Key words: galaxies: fundamental parameters - astronomical data bases: miscellaneous - catalogs
Retrieve 22 NED objects in this reference.
Please click here for ADS abstract

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