Extragalactic database. VII Reduction of astrophysical parameters

Details Extragalactic database. VII Reduction of astrophysical parameters Extragalactic database. VII Reduction of astrophysical parameters

1998-06-10

arxiv.org/abs/astro-ph/9806140v1

A&A Suppl. Series 1997, 124, p109-122

Astronomy and Astrophysics

Astrophysics

13 pages, 12 figures. The CDROM of the extragalactic database LEDA is available by mailing to: petit@obs.univ-lyon1.fr

Scientific paper

10.1051/aas:1997354

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 (telnet lmc.univ-lyon1.fr, login: leda, no passwd OR http://www-obs.univ-lyon1.fr/leda ) and distributed on a standard CD-ROM (PGC-ROM 1996) by the Observatoire de Lyon via the CNRS (mail to petit@obs.univ-lyon1.fr).

Affiliated with

Also associated with

No associations

Rating

Extragalactic database. VII Reduction of astrophysical parameters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Extragalactic database. VII Reduction of astrophysical parameters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extragalactic database. VII Reduction of astrophysical parameters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-611443