The North Galactic Pole +30° Zone Galaxies. I. A Comparative Study of Galaxies with Different Nuclear Activity

Details The North Galactic Pole +30° Zone Galaxies. I. A Comparative Study of Galaxies with Different Nuclear Activity The North Galactic Pole +30° Zone Galaxies. I. A Comparative Study of Galaxies with Different Nuclear Activity

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apjs..175...86p&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 175, Issue 1, pp. 86-96.

Statistics

3

Astronomical Data Bases: Miscellaneous, Galaxies: Active, Galaxies: Interactions, Galaxies: Starburst, Galaxies: Statistics

Scientific paper

A database containing 618 active and star-forming (A/SF) galaxies and 564 normal galaxies in a 120deg×6deg wide strip crossing the north Galactic pole was constructed in order to compare the global properties of ``active'' galaxies against a control sample of ``normal'' galaxies. This database combines a literature and catalog search with new optical measurements from the Fpg (red) and Jpg (blue) band images of the STScI Digitized Sky Survey (DSS). We provide alternative names, accurate coordinates, morphological type, activity classes, red and blue apparent magnitudes, 2MASS near-infrared J-H and H-K colors, apparent diameters, axial ratios, position angles, and number counts of neighboring objects in a circle of radius 50 kpc. We also present an atlas of 103 interacting and merging systems among these galaxies. The integrated properties of A/SF and normal galaxies in this sample are compared using a multivariate factor analysis, which reveals that A/SF galaxies are objects with relatively late morphological types, and are more inclined and have bluer optical colors than normal galaxies. In this sample, all merging and interacting galaxies are A/SF objects. Star-forming galaxies are objects with relatively late morphological types, lower absolute luminosities and linear sizes, bluer colors, and higher inclination than sample X-ray or radio sources, as well as Seyfert galaxies. The near-infrared colors of the sample galaxies are independent parameters and do not correlate with activity level or any other parameter of the galaxies.

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