IUE observations of NGC 4649, an elliptical galaxy with a strong ultraviolet flux

Details IUE observations of NGC 4649, an elliptical galaxy with a strong ultraviolet flux IUE observations of NGC 4649, an elliptical galaxy with a strong ultraviolet flux

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..494b&link_type=abstract

Astrophysical Journal, Part 1, vol. 254, Mar. 15, 1982, p. 494-499.

Astronomy and Astrophysics

Astronomy

76

Astronomical Spectroscopy, Elliptical Galaxies, Iue, Spectral Energy Distribution, Ultraviolet Spectra, Red Shift, Spectrophotometry, Ultraviolet Astronomy

Scientific paper

As in the previously studied elliptical galaxies, the flux f(lambda) in NGC 4649 has a minimum at 2500 A followed by a rapid increase towards shorter wavelengths. In NGC 4649, the flux level of this rising branch is the highest so far observed and seems not to be correlated with the luminosity or activity in the galaxy. The excess shortward of 4000 A, observed in M87, another high level rising branch galaxy, is not present in NGC 4649. The UV spectrum of NGC 4649 down to 2500 A matches closely those of NGC 3379 and NGC 4472. The implications of the UV properties of elliptical galaxies on the stellar content as well as on magnitudes and colors of distant galaxies are discussed

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