The Redshift and Composite Nature of AP Librae (pks 1514-24)
Abstract
AP Librae, a violent optical variable similar to BL Lac, is found to have a redshift of z = 0.0486 and to consist of a galaxy with V magnitude of -21.4, and an unresolved, starlike core contributing about 70% of the total light in the V band. The colors of the quasi-stellar core, B - V = +0.3, U - B = -0.6, are typical of QSOs.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1974
- DOI:
- Bibcode:
- 1974ApJ...194L..79D
- Keywords:
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- Galactic Radiation;
- Quasars;
- Red Shift;
- Spectral Energy Distribution;
- Ubv Spectra;
- Variable Stars;
- Astronomical Photometry;
- Elliptical Galaxies;
- Emission Spectra;
- Light Curve;
- Astrophysics