NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-25 T05:57:06 PDT
Help | Comment | NED Home

For refcode 1991AJ....101..410S:
Retrieve 42 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1991AJ....101..410S THE GALAXY ACTIVITY-INTERACTION CONNECTION. I. OPTICAL OBSERVATIONS ERIC P. SMITH Laboratory for Astronomy and Solar Physics/Goddard Space Flight Center, Code 681, Greenbelt, Maryland 20771 PAUL HINTZEN Department of Physics, University of Nevada, Las Vegas, Nevada and Laboratory for Astronomy and Solar Physics/Goddard Space Flight Center, Code 681, Greenbelt, Maryland 20771 Received 16 August 1990; revised 2 October 1990 ABSTRACT As part of an investigation into the triggering of nuclear radio emission in interacting galaxies, we present new multicolor, broadband data from a subset of Arp-Madore Catalog galaxies selected on the basis of their optical morphology-systems with loops and/or tails. Using the CTIO 4m we obtained images in B, V, R, and J for the purpose of performing synthetic aperture photometry. We also have performed isophotal ellipse fitting to the more regular objects in the sample to quantify their isophotal deviation from purely elliptical morphologies. We constructed color index maps for the galaxies and discuss the optical morphologies, broadband colors, and detailed photometric properties as well as the IRAS fluxes for the galaxies. These data are used to obtain a rough measure of the level of activity present in these systems. The systems observed exhibit: (1) a wide range of colors, from redder than normal disk galaxies or ellipticals to bluer than (B - V) = 0.5. The reddest galaxies are systems with significant amounts of obscuring dust while the bluest galaxies may be experiencing a strong burst of star formation. (2) Contrasting colors in many pairs indicating that star formation is triggered in one and not the other, although sizes and masses are not grossly dissimilar. (3) Apparent superimposed stars seen in many cases, but at least two systems 1325 - 371 and 1925 - 724, appear to contain AGNs. Spectroscopy is required for further analysis of the sample. Later papers will present VLA radio data for these galaxies.
Retrieve 42 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home