Abstract
view Abstract Citations (86) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Emission-Line Intensities and Radial Velocities in the Interacting Galaxies NGC 4038-4039 Rubin, Vera C. ; Ford, W. Kent, Jr. ; D'Odorico, Sandro Abstract Spectrograms of eighteen emission regions in the peculiar extragalactic system NGC 4038-4039 show emission lines of Hp; [0 iii] XX4959, 5007; He I X5876; [0 ii X6300; [N ii] XX6548, 6583; Ha; and [S iii , 6731. The value of the Ha/H intensity ranges from 6 to 14. The helium-to-hydrogen abundance is 0.16 (uncorrected for reddening) or 0.071 (corrected for reddening by using the Ha/Hp theoretical intensity ratio). From a discussion of the sizes of the luminous regions, the systemic velocity, the magnitude of the brightest stars, and the magnitude of the 1921 supernova, a distance of 9 + 3 Mpc is . The line-of-sight velocities show a spread of only 235 km over all the emission regions. The velocity field exhibits a systematic variation from knot to knot, which can be interpreted as due to two rotating, interacting galaxies. Publication: The Astrophysical Journal Pub Date: June 1970 DOI: 10.1086/150473 Bibcode: 1970ApJ...160..801R full text sources ADS | data products SIMBAD (9) NED (2)
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