A multivariate statistical analysis of spiral galaxy luminosities. I. Data and results

Details A multivariate statistical analysis of spiral galaxy luminosities. I. Data and results A multivariate statistical analysis of spiral galaxy luminosities. I. Data and results

2001-06-20

arxiv.org/abs/astro-ph/0106361v2

Astrophys.J.Suppl. 137 (2001) 139-200

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/322998

We have performed a multiparametric analysis of luminosity data for a sample of 234 normal spiral and irregular galaxies observed in X-rays with the {\it Einstein Observatory}. This sample is representative of S and Irr galaxies, with a good coverage of morphological types and absolute magnitudes. In addition to X-ray and optical da ta, we have compiled H-band magnitudes, IRAS near- and far-infrared, and 6cm radio co ntinuum observations for the sample from the literature. We have also performed a carefu l compilation of distance estimates. We have explored the effect of morphology by dividing the sample into early (S0/a-Sab), intermediate (Sb-Sbc), and late-type (Sc-Irr) subsamples. The data were analysed with bivariate and multiv ariate survival analysis techniques that make full use of all the information available in both detections and limits.

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