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Showing 1997 · astro-phShow all

60 papers · 2 filters

astro-ph1997★ 72 cited

Galaxy Formation and Evolution: I. The Padua TreeSPH code (PD-SPH)

Giovanni Carraro, Cesario Lia, Cesare Chiosi

In this paper we report on PD-SPH the new tree-sph code developed in Padua. The main features of the code are described and the results of a new and independent series of 1-D and 3…

astro-ph1997★ 1 cited

BeppoSAX observations of PKS 0528+134

G. Ghisellini, G. Tagliaferri, L. Costamante +25

We report on the BeppoSAX observations of the gamma-ray blazar PKS 0528+134 performed in Feb and Mar 1997, during a multiwavelength campaign involving EGRET and ground based telesc…

astro-ph1997★ 12 cited

UBVRI photometry and spectroscopy of the young open cluster Haffner 18

Ulisse Munari, Giovanni Carraro, Roberto Barbon

UBVRI CCD photometry of a field centered on the young open cluster Haffner~18 is presented and discussed. Spectroscopic classification of seven s…

astro-ph1997★ 8 cited

On the runaway instability of relativistic tori

M. A. Abramowicz, V. Karas, A. Lanza

We further investigate the runaway instability of relativistic tori around black holes assuming a power law distribution of the specific angular momentum. We neglect the self-gravi…

astro-ph1997★ 33 cited

A global descriptor of spatial pattern interaction in the galaxy distribution

Martin Kerscher, Maria Jesus Pons-Borderia, Jens Schmalzing +4

We present the function J as a morphological descriptor for point patterns formed by the distribution of galaxies in the Universe. This function was recently introduced in the fiel…

astro-ph1997

The spatial distribution and luminosity function of the open cluster NGC 4815

Bing Chen, Giovanni Carraro, Jordi Torra +1

NGC 4815 is a distant and populous open cluster, which lies in the galactic plane in a region of strong absorption. As a consequence, its membership, spatial distribution and lumin…