PKS 0521-365
| PKS 0521-365 | |
|---|---|
| Observation data (Epoch J2000) | |
| Constellation | Columba |
| Right ascension | 05h 22m 57.984s[1] |
| Declination | −36° 27′ 30.85″[1] |
| Redshift | 0.0556±0.0005[2] |
| Type | BL Lac |
| Apparent magnitude (V) | 14.62[3] |
| Other designations | |
| ESO 362-21, QSO B0521-365[4] | |
| See also: Quasar, List of quasars | |
PKS 0521-365 is an active galactic nucleus in the southern constellation of Columba. Because of its proximity, the source (BL Lac object) is a strong emitter from radio to gamma frequencies.[5] The object is at a redshift of z = 0.056.[2]
This object first came of interest when an optical counterpart of a radio source was identified. At higher resolutions, this object was found to display an elliptical profile, suggesting an active elliptical galaxy. Photometric study showed the source varied in brightness by up to a magnitude over monthly periods. The spectrum is nearly continuous with only weak emission lines, suggesting this is a BL Lac object. There is a jet-like structure extending toward the northwest.[6]
References
[edit]- ^ a b Charlot, P.; et al. (2020), "The third realization of the International Celestial Reference Frame by very long baseline interferometry", Astronomy and Astrophysics, 644: A159, arXiv:2010.13625, Bibcode:2020A&A...644A.159C, doi:10.1051/0004-6361/202038368, S2CID 225068756.
- ^ a b García-Pérez, A.; et al. (March 2024), "Powerful Radio Sources in the Southern Sky. III. First Results of the Optical Spectroscopic Campaign", The Astrophysical Journal Supplement Series, 271 (1), id. 8, Bibcode:2024ApJS..271....8G, doi:10.3847/1538-4365/ad159e.
- ^ Véron-Cetty, M.-P.; Véron, P. (2010), "A catalogue of quasars and active nuclei", Astronomy & Astrophysics, 518 (A10) (13th ed.): A10, Bibcode:2010A&A...518A..10V, doi:10.1051/0004-6361/201014188.
- ^ "ESO 362-21". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-10-19.
- ^ Tingay, S. J.; Edwards, P. G. (August 2002), "The Parsec-Scale Structure and Evolution of PKS 0521-365", The Astronomical Journal, 124 (2): 652–661, Bibcode:2002AJ....124..652T, doi:10.1086/341391.
- ^ Danziger, I. J.; et al. (March 1985), "The multi-faceted active galaxy PKS 0521 - 36", The Messenger, 39: 20, Bibcode:1985Msngr..39...20D.
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