Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340..729n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 15, 1989, p. 729-738. Research supported by the Japan Society for
Astronomy and Astrophysics
Astronomy
30
Astronomical Photometry, Infrared Astronomy, Interacting Galaxies, Star Formation, Starburst Galaxies, Active Galactic Nuclei, Astronomical Spectroscopy, Emission Spectra, Galactic Evolution, H Lines
Scientific paper
Extensive infrared observations have been obtained of the three active regions in Arp 299. Multiaperture JHK photometry reveals that the colors of the three regions are totally different from each other, and that there are very red nuclei smaller than 4 arcsec in two of them. Multiaperture spectroscopy of the Br-gamma and the shock-excited H2 lines shows that both the atomic and molecular lines are spatially extended, indicating that Arp 299 is undergoing an active episode of star formation not only in its nuclei but also well outside of them. Although there is some evidence that suggests the presence of a compact, active galactic nucleus, a simple starburst model can explain the bolometric luminosities, production rates of ionizing photons, and H24 line luminosities of each active region in Arp 299. However, each starburst cannot last longer than 10 to the 8th yr.
Geballe Thomas Ronald
Matsuhara Hideo
Nagata Tetsuya
Nakagawa Takao
Okuda Haruyuki
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