Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-07-28
Astronomy and Astrophysics
Astrophysics
LaTex, 18 pages with 4 jpg figures, ApJ, in press
Scientific paper
10.1086/307920
High resolution, 1.1, 1.6, and 2.2 micron imaging of the luminous infrared galaxy NGC 6090 obtained with NICMOS of the Hubble Space Telescope are presented. These new observations are centered on the two nuclei of the merger, and reveal the spiral structure of the eastern galaxy and the amorphous nature of the western galaxy. The nuclear separation of 3.2 kpc (H_0 = 75 km/s/Mpc) indicates that NGC 6090 is at an intermediate stage of merging. Bright knots/clusters are also visible in the region overlapping the merging galaxies; four of these knots appear bluer than the underlying galaxies and have colors consistent with young (<~ 10^7 yr) star clusters. The spatial coincidence of the knots with the molecular gas in NGC 6090 indicates that much of the present star formation is occuring outside of the nuclear region of merging galaxies, consistent with recent studies of other double nuclei luminous infrared galaxies.
Dinshaw Nadine
Epps Harland
Evans Aaron S.
Rieke Marcia
Scoville Nicholas Z.
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