On The Nature of Faint Galaxies with Strong UV Excess

Details On The Nature of Faint Galaxies with Strong UV Excess On The Nature of Faint Galaxies with Strong UV Excess

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.3117c&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #31.17; Bulletin of the American Astronomical Society, Vol. 25, p.843

Astronomy and Astrophysics

Astronomy

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Scientific paper

Four faint galaxies identified in the Case Low-Dispersion Northern Sky Survey (Stephenson, Pesch, MacConnell 1992,ApJSS,82,471) show unusually strong UV excess in their objective prism spectra. We are currently investigating the nature of these galaxies (CG 1280, CG 1293, CG 1298, CG 1331). The preliminary results from the analysis of the spectra for galaxies CG 1293 (R.A.=15(h}22({m}00^{s)) .0, Decl.=+30deg 29(') .7 [1950]) and CG 1331 (R.A.=15(h}54({m}41^{s)) .9, Decl.=+29deg 57(') .4 [1950]) are presented. Stephenson, Pesch and MacConnell report that both galaxies have blue magnitudes of approximately 17. We obtained observations of these objects on 1992 July 2 and 3 with the CCD spectrograph on the 40-inch telescope at Mount Laguna Observatory. This CCD has an 800 x 800 format and covers an approximate wavelength range of 4000 Angstroms to 7000 Angstroms. Our analysis of the spectra reveals strong Hα emission with broad line profiles characteristic of Seyfert 1 galaxies. The spectrum of CG 1293 indicates a redshift of z = 0.1255 0.0003 and an Hα emission line width of 4180 km/sec (FWHM). The [SII] pair lambda 6717 and lambda 6731 have also been identified. We have determined a preliminary redshift for CG 1331 of z = 0.089 +/- 0.004. The Hα emission line width for CG 1331 is 7350 km/sec (FWHM). Lines corresponding to Hβ and Hγ have also been identified. This research has been supported in part by NASA through the Nevada Space Grant Consortium.

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